forked from openkylin/libconfig-general-perl
2890 lines
84 KiB
Perl
2890 lines
84 KiB
Perl
#
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# Config::General.pm - Generic Config Module
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#
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# Purpose: Provide a convenient way for loading
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# config values from a given file and
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# return it as hash structure
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#
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# Copyright (c) 2000-2022 Thomas Linden <tlinden |AT| cpan.org>.
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# All Rights Reserved. Std. disclaimer applies.
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# Licensed under the Artistic License 2.0.
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#
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# namespace
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package Config::General;
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use strict;
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use warnings;
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use English '-no_match_vars';
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use IO::File;
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use FileHandle;
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use File::Spec::Functions qw(splitpath file_name_is_absolute catfile catpath);
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use File::Glob qw/:glob/;
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# on debian with perl > 5.8.4 croak() doesn't work anymore without this.
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# There is some require statement which dies 'cause it can't find Carp::Heavy,
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# I really don't understand, what the hell they made, but the debian perl
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# installation is definitely bullshit, damn!
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use Carp::Heavy;
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use Carp;
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use Exporter;
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$Config::General::VERSION = "2.65";
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use vars qw(@ISA @EXPORT_OK);
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use base qw(Exporter);
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@EXPORT_OK = qw(ParseConfig SaveConfig SaveConfigString);
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use constant _UTF8_BOM => "\x{ef}\x{bb}\x{bf}";
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sub new {
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#
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# create new Config::General object
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#
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my($this, @param ) = @_;
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my $class = ref($this) || $this;
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# define default options
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my $self = {
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# sha256 of current date
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# hopefully this lowers the probability that
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# this matches any configuration key or value out there
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# bugfix for rt.40925
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EOFseparator => 'ad7d7b87f5b81d2a0d5cb75294afeb91aa4801b1f8e8532dc1b633c0e1d47037',
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SlashIsDirectory => 0,
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AllowMultiOptions => 1,
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MergeDuplicateOptions => 0,
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MergeDuplicateBlocks => 0,
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LowerCaseNames => 0,
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ApacheCompatible => 0,
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UseApacheInclude => 0,
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IncludeRelative => 0,
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IncludeDirectories => 0,
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IncludeGlob => 0,
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IncludeAgain => 0,
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AutoLaunder => 0,
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AutoTrue => 0,
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AutoTrueFlags => {
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true => '^(on|yes|true|1)$',
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false => '^(off|no|false|0)$',
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},
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DefaultConfig => {},
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String => '',
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level => 1,
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InterPolateVars => 0,
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InterPolateEnv => 0,
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ExtendedAccess => 0,
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SplitPolicy => 'guess', # also possible: whitespace, equalsign and custom
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SplitDelimiter => 0, # must be set by the user if SplitPolicy is 'custom'
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StoreDelimiter => 0, # will be set by me unless user uses 'custom' policy
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CComments => 1, # by default turned on
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BackslashEscape => 0, # deprecated
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StrictObjects => 1, # be strict on non-existent keys in OOP mode
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StrictVars => 1, # be strict on undefined variables in Interpolate mode
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Tie => q(), # could be set to a perl module for tie'ing new hashes
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parsed => 0, # internal state stuff for variable interpolation
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files => {}, # which files we have read, if any
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UTF8 => 0,
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SaveSorted => 0,
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ForceArray => 0, # force single value array if value enclosed in []
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AllowSingleQuoteInterpolation => 0,
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NoEscape => 0,
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NormalizeBlock => 0,
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NormalizeOption => 0,
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NormalizeValue => 0,
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Plug => {},
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UseApacheIfDefine => 0,
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Define => {}
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};
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# create the class instance
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bless $self, $class;
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if ($#param >= 1) {
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# use of the new hash interface!
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$self->_prepare(@param);
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}
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elsif ($#param == 0) {
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# use of the old style
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$self->{ConfigFile} = $param[0];
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if (ref($self->{ConfigFile}) eq 'HASH') {
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$self->{ConfigHash} = delete $self->{ConfigFile};
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}
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}
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else {
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# this happens if $#param == -1,1 thus no param was given to new!
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$self->{config} = $self->_hashref();
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$self->{parsed} = 1;
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}
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# find split policy to use for option/value separation
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$self->_splitpolicy();
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# bless into variable interpolation module if necessary
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$self->_blessvars();
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# process as usual
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if (!$self->{parsed}) {
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$self->_process();
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}
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if ($self->{InterPolateVars}) {
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$self->{config} = $self->_clean_stack($self->{config});
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}
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# bless into OOP namespace if required
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$self->_blessoop();
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return $self;
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}
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sub _process {
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#
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# call _read() and _parse() on the given config
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my($self) = @_;
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if ($self->{DefaultConfig} && $self->{InterPolateVars}) {
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$self->{DefaultConfig} = $self->_interpolate_hash($self->{DefaultConfig}); # FIXME: _hashref() ?
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}
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if (exists $self->{StringContent}) {
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# consider the supplied string as config file
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$self->_read($self->{StringContent}, 'SCALAR');
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$self->{config} = $self->_parse($self->{DefaultConfig}, $self->{content});
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}
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elsif (exists $self->{ConfigHash}) {
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if (ref($self->{ConfigHash}) eq 'HASH') {
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# initialize with given hash
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$self->{config} = $self->{ConfigHash};
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$self->{parsed} = 1;
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}
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else {
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croak "Config::General: Parameter -ConfigHash must be a hash reference!\n";
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}
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}
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elsif (ref($self->{ConfigFile}) eq 'GLOB' || ref($self->{ConfigFile}) eq 'FileHandle') {
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# use the file the glob points to
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$self->_read($self->{ConfigFile});
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$self->{config} = $self->_parse($self->{DefaultConfig}, $self->{content});
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}
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else {
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if ($self->{ConfigFile}) {
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# open the file and read the contents in
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$self->{configfile} = $self->{ConfigFile};
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if ( file_name_is_absolute($self->{ConfigFile}) ) {
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# look if this is an absolute path and save the basename if it is absolute
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my ($volume, $path, undef) = splitpath($self->{ConfigFile});
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$path =~ s#/$##; # remove eventually existing trailing slash
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if (! $self->{ConfigPath}) {
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$self->{ConfigPath} = [];
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}
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unshift @{$self->{ConfigPath}}, catpath($volume, $path, q());
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}
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$self->_open($self->{configfile});
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# now, we parse immediately, getall simply returns the whole hash
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$self->{config} = $self->_hashref();
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$self->{config} = $self->_parse($self->{DefaultConfig}, $self->{content});
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}
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else {
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# hm, no valid config file given, so try it as an empty object
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$self->{config} = $self->_hashref();
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$self->{parsed} = 1;
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}
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}
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}
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sub _blessoop {
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#
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# bless into ::Extended if necessary
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my($self) = @_;
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if ($self->{ExtendedAccess}) {
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# we are blessing here again, to get into the ::Extended namespace
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# for inheriting the methods available over there, which we doesn't have.
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bless $self, 'Config::General::Extended';
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eval {
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require Config::General::Extended;
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};
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if ($EVAL_ERROR) {
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croak "Config::General: " . $EVAL_ERROR;
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}
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}
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# return $self;
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}
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sub _blessvars {
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#
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# bless into ::Interpolated if necessary
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my($self) = @_;
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if ($self->{InterPolateVars} || $self->{InterPolateEnv}) {
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# InterPolateEnv implies InterPolateVars
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$self->{InterPolateVars} = 1;
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# we are blessing here again, to get into the ::InterPolated namespace
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# for inheriting the methods available overthere, which we doesn't have here.
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bless $self, 'Config::General::Interpolated';
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eval {
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require Config::General::Interpolated;
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};
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if ($EVAL_ERROR) {
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croak "Config::General: " . $EVAL_ERROR;
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}
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# pre-compile the variable regexp
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$self->{regex} = $self->_set_regex();
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}
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}
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sub _splitpolicy {
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#
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# find out what split policy to use
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my($self) = @_;
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if ($self->{SplitPolicy} ne 'guess') {
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if ($self->{SplitPolicy} eq 'whitespace') {
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$self->{SplitDelimiter} = '\s+';
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if (!$self->{StoreDelimiter}) {
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$self->{StoreDelimiter} = q( );
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}
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}
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elsif ($self->{SplitPolicy} eq 'equalsign') {
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$self->{SplitDelimiter} = '\s*=\s*';
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if (!$self->{StoreDelimiter}) {
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$self->{StoreDelimiter} = ' = ';
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}
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}
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elsif ($self->{SplitPolicy} eq 'custom') {
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if (! $self->{SplitDelimiter} ) {
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croak "Config::General: SplitPolicy set to 'custom' but no SplitDelimiter set.\n";
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}
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}
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else {
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croak "Config::General: Unsupported SplitPolicy: $self->{SplitPolicy}.\n";
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}
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}
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else {
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if (!$self->{StoreDelimiter}) {
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$self->{StoreDelimiter} = q( );
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}
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}
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}
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sub _prepare {
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#
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# prepare the class parameters, mangle them, if there
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# are options to reset or to override, do it here.
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my ($self, %conf) = @_;
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# save the parameter list for ::Extended's new() calls
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$self->{Params} = \%conf;
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# be backwards compatible
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if (exists $conf{-file}) {
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$self->{ConfigFile} = delete $conf{-file};
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}
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if (exists $conf{-hash}) {
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$self->{ConfigHash} = delete $conf{-hash};
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}
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# store input, file, handle, or array
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if (exists $conf{-ConfigFile}) {
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$self->{ConfigFile} = delete $conf{-ConfigFile};
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}
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if (exists $conf{-ConfigHash}) {
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$self->{ConfigHash} = delete $conf{-ConfigHash};
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}
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# store search path for relative configs, if any
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if (exists $conf{-ConfigPath}) {
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my $configpath = delete $conf{-ConfigPath};
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$self->{ConfigPath} = ref $configpath eq 'ARRAY' ? $configpath : [$configpath];
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}
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# handle options which contains values we need (strings, hashrefs or the like)
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if (exists $conf{-String} ) {
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if (not ref $conf{-String}) {
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if ( $conf{-String}) {
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$self->{StringContent} = $conf{-String};
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}
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delete $conf{-String};
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}
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# re-implement arrayref support, removed after 2.22 as _read were
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# re-organized
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# fixed bug#33385
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elsif(ref($conf{-String}) eq 'ARRAY') {
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$self->{StringContent} = join "\n", @{$conf{-String}};
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}
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else {
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croak "Config::General: Parameter -String must be a SCALAR or ARRAYREF!\n";
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}
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delete $conf{-String};
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}
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if (exists $conf{-Tie}) {
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if ($conf{-Tie}) {
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$self->{Tie} = delete $conf{-Tie};
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$self->{DefaultConfig} = $self->_hashref();
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}
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}
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if (exists $conf{-FlagBits}) {
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if ($conf{-FlagBits} && ref($conf{-FlagBits}) eq 'HASH') {
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$self->{FlagBits} = 1;
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$self->{FlagBitsFlags} = $conf{-FlagBits};
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}
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delete $conf{-FlagBits};
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}
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if (exists $conf{-DefaultConfig}) {
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if ($conf{-DefaultConfig} && ref($conf{-DefaultConfig}) eq 'HASH') {
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# copy the hashref so that it is not being modified by subsequent calls, fixes bug#142095
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$self->{DefaultConfig} = $self->_copy($conf{-DefaultConfig});
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}
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elsif ($conf{-DefaultConfig} && ref($conf{-DefaultConfig}) eq q()) {
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$self->_read($conf{-DefaultConfig}, 'SCALAR');
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$self->{DefaultConfig} = $self->_parse($self->_hashref(), $self->{content});
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$self->{content} = ();
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}
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delete $conf{-DefaultConfig};
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}
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# handle options which may either be true or false
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# allowing "human" logic about what is true and what is not
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foreach my $entry (keys %conf) {
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my $key = $entry;
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$key =~ s/^\-//;
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if (! exists $self->{$key}) {
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croak "Config::General: Unknown parameter: $entry => \"$conf{$entry}\" (key: <$key>)\n";
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}
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if ($conf{$entry} =~ /$self->{AutoTrueFlags}->{true}/io) {
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$self->{$key} = 1;
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}
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elsif ($conf{$entry} =~ /$self->{AutoTrueFlags}->{false}/io) {
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$self->{$key} = 0;
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}
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else {
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# keep it untouched
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$self->{$key} = $conf{$entry};
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}
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}
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if ($self->{MergeDuplicateOptions}) {
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# override if not set by user
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if (! exists $conf{-AllowMultiOptions}) {
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$self->{AllowMultiOptions} = 0;
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}
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}
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if ($self->{ApacheCompatible}) {
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# turn on all apache compatibility options which has
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# been incorporated during the years...
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$self->{UseApacheInclude} = 1;
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$self->{IncludeRelative} = 1;
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$self->{IncludeDirectories} = 1;
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$self->{IncludeGlob} = 1;
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$self->{SlashIsDirectory} = 1;
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$self->{SplitPolicy} = 'whitespace';
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$self->{CComments} = 0;
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$self->{UseApacheIfDefine} = 1;
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}
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if ($self->{UseApacheIfDefine}) {
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if (exists $conf{-Define}) {
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my $ref = ref($conf{-Define});
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if ($ref eq '') {
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$self->{Define} = {$conf{-Define} => 1};
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}
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elsif ($ref eq 'SCALAR') {
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$self->{Define} = {${$conf{-Define}} = 1};
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}
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elsif ($ref eq 'ARRAY') {
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my %h = map { $_ => 1 } @{$conf{-Define}};
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$self->{Define} = \%h;
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}
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elsif ($ref eq 'HASH') {
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$self->{Define} = $conf{-Define};
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}
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else {
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croak qq{Config::General: Unsupported ref '$ref' for 'Define'};
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}
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delete $conf{-Define};
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}
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}
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}
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sub getall {
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#
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# just return the whole config hash
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#
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my($this) = @_;
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return (exists $this->{config} ? %{$this->{config}} : () );
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}
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sub files {
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#
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# return a list of files opened so far
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#
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my($this) = @_;
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return (exists $this->{files} ? keys %{$this->{files}} : () );
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}
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sub _open {
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#
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# open the config file, or expand a directory or glob or include
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#
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my($this, $basefile, $basepath) = @_;
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my $cont;
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($cont, $basefile, $basepath) = $this->_hook('pre_open', $basefile, $basepath);
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return if(!$cont);
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my($fh, $configfile);
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if($basepath) {
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# if this doesn't work we can still try later the global config path to use
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$configfile = catfile($basepath, $basefile);
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}
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else {
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$configfile = $basefile;
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}
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my $glob = qr/[*?\[\{\\]/;
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if ($^O =~ /win/i) {
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# fix for rt.cpan.org#116340: do only consider a backslash
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# as meta escape char, but not if it appears on it's own,
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# as it happens on windows platforms.
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$glob = qr/(\\[*?\[\{\\]|[*?\[\{])/;
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}
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if ($this->{IncludeGlob} and $configfile =~ /$glob/) {
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# Something like: *.conf (or maybe dir/*.conf) was included; expand it and
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# pass each expansion through this method again.
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local $_;
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my @include = grep { -f $_ } bsd_glob($configfile, GLOB_BRACE | GLOB_QUOTE);
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# applied patch by AlexK fixing rt.cpan.org#41030
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if ( !@include && defined $this->{ConfigPath} ) {
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foreach my $dir (@{$this->{ConfigPath}}) {
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my ($volume, $path, undef) = splitpath($basefile);
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if ( -d catfile( $dir, $path ) ) {
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push @include, grep { -f $_ } bsd_glob(catfile($dir, $basefile), GLOB_BRACE | GLOB_QUOTE);
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last;
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}
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}
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}
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# Multiple results or no expansion results (which is fine,
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# include foo/* shouldn't fail if there isn't anything matching)
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# rt.cpan.org#79869: local $this->{IncludeGlob};
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foreach my $file (@include) {
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$this->_open($file);
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}
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return;
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}
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if (!-e $configfile) {
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my $found;
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if (defined $this->{ConfigPath}) {
|
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# try to find the file within ConfigPath
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foreach my $dir (@{$this->{ConfigPath}}) {
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if( -e catfile($dir, $basefile) ) {
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$configfile = catfile($dir, $basefile);
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$found = 1;
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last; # found it
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}
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}
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}
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if (!$found) {
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my $path_message = defined $this->{ConfigPath} ? q( within ConfigPath: ) . join(q(.), @{$this->{ConfigPath}}) : q();
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croak qq{Config::General The file "$basefile" does not exist$path_message!};
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}
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}
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local ($RS) = $RS;
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if (! $RS) {
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carp(q(\$RS (INPUT_RECORD_SEPARATOR) is undefined. Guessing you want a line feed character));
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$RS = "\n";
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}
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if (-d $configfile and $this->{IncludeDirectories}) {
|
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# A directory was included; include all the files inside that directory in ASCII order
|
|
local *INCLUDEDIR;
|
|
opendir INCLUDEDIR, $configfile or croak "Config::General: Could not open directory $configfile!($!)\n";
|
|
#my @files = sort grep { -f catfile($configfile, $_) } catfile($configfile, $_), readdir INCLUDEDIR;
|
|
# fixes rt.cpan.org#139261
|
|
my @files = sort grep { -f catfile($configfile, $_) } readdir INCLUDEDIR;
|
|
closedir INCLUDEDIR;
|
|
local $this->{CurrentConfigFilePath} = $configfile;
|
|
for (@files) {
|
|
my $file = catfile($configfile, $_);
|
|
if (! exists $this->{files}->{$file} or $this->{IncludeAgain} ) {
|
|
# support re-read if used urged us to do so, otherwise ignore the file
|
|
$fh = $this->_openfile_for_read($file);
|
|
$this->{files}->{"$file"} = 1;
|
|
$this->_read($fh);
|
|
}
|
|
else {
|
|
warn "File $file already loaded. Use -IncludeAgain to load it again.\n";
|
|
}
|
|
}
|
|
}
|
|
elsif (-d $configfile) {
|
|
croak "Config::General: config file argument is a directory, expecting a file!\n";
|
|
}
|
|
elsif (-e _) {
|
|
if (exists $this->{files}->{$configfile} and not $this->{IncludeAgain}) {
|
|
# do not read the same file twice, just return
|
|
warn "File $configfile already loaded. Use -IncludeAgain to load it again.\n";
|
|
return;
|
|
}
|
|
else {
|
|
$fh = $this->_openfile_for_read($configfile);
|
|
$this->{files}->{$configfile} = 1;
|
|
|
|
my ($volume, $path, undef) = splitpath($configfile);
|
|
local $this->{CurrentConfigFilePath} = catpath($volume, $path, q());
|
|
|
|
$this->_read($fh);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
sub _openfile_for_read {
|
|
#
|
|
# actually open a file, turn on utf8 mode if requested by bom
|
|
#
|
|
my ($this, $file) = @_;
|
|
|
|
my $fh = IO::File->new( $file, 'r')
|
|
or croak "Config::General: Could not open $file!($!)\n";
|
|
|
|
# attempt to read an initial utf8 byte-order mark (BOM)
|
|
my $n_read = sysread $fh, my $read_BOM, length(_UTF8_BOM);
|
|
my $has_BOM = $n_read == length(_UTF8_BOM) && $read_BOM eq _UTF8_BOM;
|
|
|
|
# set utf8 perlio layer if BOM was found or if option -UTF8 is turned on
|
|
binmode $fh, ":utf8" if $this->{UTF8} || $has_BOM;
|
|
|
|
# rewind to beginning of file if we read chars that were not the BOM
|
|
sysseek $fh, 0, 0 if $n_read && !$has_BOM;
|
|
|
|
return $fh;
|
|
}
|
|
|
|
|
|
|
|
sub _read {
|
|
#
|
|
# store the config contents in @content
|
|
# and prepare it somewhat for easier parsing later
|
|
# (comments, continuing lines, and stuff)
|
|
#
|
|
my($this, $fh, $flag) = @_;
|
|
|
|
|
|
my(@stuff, @content, $c_comment, $longline, $hier, $hierend, @hierdoc);
|
|
local $_ = q();
|
|
|
|
if ($flag && $flag eq 'SCALAR') {
|
|
if (ref($fh) eq 'ARRAY') {
|
|
@stuff = @{$fh};
|
|
}
|
|
else {
|
|
@stuff = split /\n/, $fh;
|
|
}
|
|
}
|
|
else {
|
|
@stuff = <$fh>;
|
|
}
|
|
|
|
my $cont;
|
|
($cont, $fh, @stuff) = $this->_hook('pre_read', $fh, @stuff);
|
|
return if(!$cont);
|
|
|
|
if ($this->{UseApacheIfDefine}) {
|
|
$this->_process_apache_ifdefine(\@stuff);
|
|
}
|
|
|
|
foreach (@stuff) {
|
|
if ($this->{AutoLaunder}) {
|
|
if (m/^(.*)$/) {
|
|
$_ = $1;
|
|
}
|
|
}
|
|
|
|
chomp;
|
|
|
|
|
|
if ($hier) {
|
|
# inside here-doc, only look for $hierend marker
|
|
if (/^(\s*)\Q$hierend\E\s*$/) {
|
|
my $indent = $1; # preserve indentation
|
|
$hier .= ' ' . $this->{EOFseparator}; # bugfix of rt.40925
|
|
# _parse will also preserver indentation
|
|
if ($indent) {
|
|
foreach (@hierdoc) {
|
|
s/^$indent//; # i.e. the end was: " EOF" then we remove " " from every here-doc line
|
|
$hier .= $_ . "\n"; # and store it in $hier
|
|
}
|
|
}
|
|
else {
|
|
$hier .= join "\n", @hierdoc; # there was no indentation of the end-string, so join it 1:1
|
|
}
|
|
push @{$this->{content}}, $hier; # push it onto the content stack
|
|
@hierdoc = ();
|
|
undef $hier;
|
|
undef $hierend;
|
|
}
|
|
else {
|
|
# everything else onto the stack
|
|
push @hierdoc, $_;
|
|
}
|
|
next;
|
|
}
|
|
|
|
if ($this->{CComments}) {
|
|
# look for C-Style comments, if activated
|
|
if (/(\s*\/\*.*\*\/\s*)/) {
|
|
# single c-comment on one line
|
|
s/\s*\/\*.*\*\/\s*//;
|
|
}
|
|
elsif (/^\s*\/\*/) {
|
|
# the beginning of a C-comment ("/*"), from now on ignore everything.
|
|
if (/\*\/\s*$/) {
|
|
# C-comment end is already there, so just ignore this line!
|
|
$c_comment = 0;
|
|
}
|
|
else {
|
|
$c_comment = 1;
|
|
}
|
|
}
|
|
elsif (/\*\//) {
|
|
if (!$c_comment) {
|
|
warn "invalid syntax: found end of C-comment without previous start!\n";
|
|
}
|
|
$c_comment = 0; # the current C-comment ends here, go on
|
|
s/^.*\*\///; # if there is still stuff, it will be read
|
|
}
|
|
next if($c_comment); # ignore EVERYTHING from now on, IF it IS a C-Comment
|
|
}
|
|
|
|
# Remove comments and empty lines
|
|
s/(?<!\\)#.*$//; # .+ => .* bugfix rt.cpan.org#44600
|
|
next if /^\s*#/;
|
|
|
|
# look for multiline option, indicated by a trailing backslash
|
|
if (/(?<!\\)\\$/) {
|
|
chop; # remove trailing backslash
|
|
s/^\s*//;
|
|
$longline .= $_;
|
|
next;
|
|
}
|
|
|
|
# transform explicit-empty blocks to conforming blocks
|
|
# rt.cpan.org#80006 added \s* before $/
|
|
if (!$this->{ApacheCompatible} && /\s*<([^\/]+?.*?)\/>\s*$/) {
|
|
my $block = $1;
|
|
if ($block !~ /\"/) {
|
|
if ($block !~ /\s[^\s]/) {
|
|
# fix of bug 7957, add quotation to pure slash at the
|
|
# end of a block so that it will be considered as directory
|
|
# unless the block is already quoted or contains whitespaces
|
|
# and no quotes.
|
|
if ($this->{SlashIsDirectory}) {
|
|
push @{$this->{content}}, '<' . $block . '"/">';
|
|
next;
|
|
}
|
|
}
|
|
}
|
|
my $orig = $_;
|
|
$orig =~ s/\/>$/>/;
|
|
$block =~ s/\s\s*.*$//;
|
|
push @{$this->{content}}, $orig, "</${block}>";
|
|
next;
|
|
}
|
|
|
|
|
|
# look for here-doc identifier
|
|
if ($this->{SplitPolicy} eq 'guess') {
|
|
if (/^\s*([^=]+?)\s*=\s*<<\s*(.+?)\s*$/) {
|
|
# try equal sign (fix bug rt#36607)
|
|
$hier = $1; # the actual here-doc variable name
|
|
$hierend = $2; # the here-doc identifier, i.e. "EOF"
|
|
next;
|
|
}
|
|
elsif (/^\s*(\S+?)\s+<<\s*(.+?)\s*$/) {
|
|
# try whitespace
|
|
$hier = $1; # the actual here-doc variable name
|
|
$hierend = $2; # the here-doc identifier, i.e. "EOF"
|
|
next;
|
|
}
|
|
}
|
|
else {
|
|
# no guess, use one of the configured strict split policies
|
|
if (/^\s*(.+?)($this->{SplitDelimiter})<<\s*(.+?)\s*$/) {
|
|
$hier = $1; # the actual here-doc variable name
|
|
$hierend = $3; # the here-doc identifier, i.e. "EOF"
|
|
next;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
###
|
|
### any "normal" config lines from now on
|
|
###
|
|
|
|
if ($longline) {
|
|
# previous stuff was a longline and this is the last line of the longline
|
|
s/^\s*//;
|
|
$longline .= $_;
|
|
push @{$this->{content}}, $longline; # push it onto the content stack
|
|
undef $longline;
|
|
next;
|
|
}
|
|
else {
|
|
# ignore empty lines
|
|
next if /^\s*$/;
|
|
|
|
# look for include statement(s)
|
|
my $incl_file;
|
|
my $path = '';
|
|
if ( $this->{IncludeRelative} and defined $this->{CurrentConfigFilePath}) {
|
|
$path = $this->{CurrentConfigFilePath};
|
|
}
|
|
elsif (defined $this->{ConfigPath}) {
|
|
# fetch pathname of base config file, assuming the 1st one is the path of it
|
|
$path = $this->{ConfigPath}->[0];
|
|
}
|
|
|
|
# bugfix rt.cpan.org#38635: support quoted filenames
|
|
if ($this->{UseApacheInclude}) {
|
|
my $opt = '';
|
|
if (/^\s*(include|includeoptional)\s*(["'])(.*?)(?<!\\)\2$/i) {
|
|
$incl_file = $3;
|
|
$opt = $1;
|
|
}
|
|
elsif (/^\s*(include|includeoptional)\s+(.+?)\s*$/i) {
|
|
$incl_file = $2;
|
|
$opt = $1;
|
|
}
|
|
if ($incl_file) {
|
|
if ($this->{IncludeGlob} && $opt =~ /opt/i && $incl_file !~ /[*?\[\{\\]/) {
|
|
# fix rt#107108
|
|
# glob enabled && optional include && file is not already a glob:
|
|
# turn it into a singular matching glob, like:
|
|
# "file" => "[f][i][l][e]" and:
|
|
# "dir/file" => "dir/[f][i][l][e]"
|
|
# which IS a glob but only matches that particular file. if it
|
|
# doesn't exist, it will be ignored by _open(), just what
|
|
# we'd like to have when using IncludeOptional.
|
|
my ($vol,$dirs,$file) = splitpath( $incl_file );
|
|
$incl_file = catpath($vol, $dirs, join '', map { "[$_]" } split //, $file);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (/^\s*<<include\s+(["'])(.+?)>>\\s*$/i) {
|
|
$incl_file = $2;
|
|
}
|
|
elsif (/^\s*<<include\s+(.+?)>>\s*$/i) {
|
|
$incl_file = $1;
|
|
}
|
|
}
|
|
|
|
if ($incl_file) {
|
|
if ( $this->{IncludeRelative} && $path && !file_name_is_absolute($incl_file) ) {
|
|
# include the file from within location of $this->{configfile}
|
|
$this->_open( $incl_file, $path );
|
|
}
|
|
else {
|
|
# include the file from within pwd, or absolute
|
|
$this->_open($incl_file);
|
|
}
|
|
}
|
|
else {
|
|
# standard entry, (option = value)
|
|
push @{$this->{content}}, $_;
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
($cont, $this->{content}) = $this->_hook('post_read', $this->{content});
|
|
return 1;
|
|
}
|
|
|
|
|
|
sub _process_apache_ifdefine {
|
|
#
|
|
# Loop trough config lines and exclude all those entries
|
|
# for which there's no IFDEF but which reside inside an IFDEF.
|
|
#
|
|
# Called from _read(), if UseApacheIfDefine is enabled, returns
|
|
# the modified array.
|
|
my($this, $rawlines) = @_;
|
|
|
|
my @filtered;
|
|
my @includeFlag = (1);
|
|
|
|
foreach (@{$rawlines}) {
|
|
if (/^\s*<\s*IfDefine\s+([!]*)("[^"]+"|\S+)\s*>/i) {
|
|
# new IFDEF block, mark following content to be included if
|
|
# the DEF is known, otherwise skip it til end of IFDEF
|
|
my ($negate, $define) = ($1 eq '!',$2);
|
|
|
|
push(@includeFlag,
|
|
$includeFlag[-1] &
|
|
((not $negate) & (exists $this->{Define}{$define}))
|
|
);
|
|
}
|
|
elsif (/^\s*<\s*\/IfDefine\s*>/i) {
|
|
if (scalar(@includeFlag) <= 1) {
|
|
croak qq(Config::General: </IfDefine> without a <IfDefine>!\n);
|
|
}
|
|
pop(@includeFlag);
|
|
}
|
|
elsif ($includeFlag[-1] && /^\s*Define\s+("[^"]+"|\S+)/i) {
|
|
# inline Define, add it to our list
|
|
$this->{Define}{$1} = 1;
|
|
}
|
|
elsif ($includeFlag[-1]) {
|
|
push @filtered, $_;
|
|
}
|
|
}
|
|
|
|
if (scalar(@includeFlag) > 1) {
|
|
croak qq(Config::General: Block <IfDefine> has no EndBlock statement!\n);
|
|
}
|
|
|
|
@$rawlines = @filtered; # replace caller array
|
|
}
|
|
|
|
|
|
sub _parse {
|
|
#
|
|
# parse the contents of the file
|
|
#
|
|
my($this, $config, $content) = @_;
|
|
my(@newcontent, $block, $blockname, $chunk,$block_level);
|
|
local $_;
|
|
|
|
foreach (@{$content}) { # loop over content stack
|
|
chomp;
|
|
$chunk++;
|
|
$_ =~ s/^\s+//; # strip spaces @ end and begin
|
|
$_ =~ s/\s+$//;
|
|
|
|
#
|
|
# build option value assignment, split current input
|
|
# using whitespace, equal sign or optionally here-doc
|
|
# separator EOFseparator
|
|
my ($option,$value);
|
|
if (/$this->{EOFseparator}/) {
|
|
($option,$value) = split /\s*$this->{EOFseparator}\s*/, $_, 2; # separated by heredoc-finding in _open()
|
|
}
|
|
else {
|
|
if ($this->{SplitPolicy} eq 'guess') {
|
|
# again the old regex. use equalsign SplitPolicy to get the
|
|
# 2.00 behavior. the new regexes were too odd.
|
|
($option,$value) = split /\s*=\s*|\s+/, $_, 2;
|
|
}
|
|
else {
|
|
# no guess, use one of the configured strict split policies
|
|
($option,$value) = split /$this->{SplitDelimiter}/, $_, 2;
|
|
}
|
|
}
|
|
|
|
if($this->{NormalizeOption}) {
|
|
$option = $this->{NormalizeOption}($option);
|
|
}
|
|
|
|
if ($value && $value =~ /^"/ && $value =~ /"$/) {
|
|
$value =~ s/^"//; # remove leading and trailing "
|
|
$value =~ s/"$//;
|
|
}
|
|
if (! defined $block) { # not inside a block @ the moment
|
|
if (/^<([^\/]+?.*?)>$/) { # look if it is a block
|
|
$block = $1; # store block name
|
|
if ($block =~ /^"([^"]+)"$/) {
|
|
# quoted block, unquote it and do not split
|
|
$block =~ s/"//g;
|
|
}
|
|
else {
|
|
# If it is a named block store the name separately; allow the block and name to each be quoted
|
|
if ($block =~ /^(?:"([^"]+)"|(\S+))(?:\s+(?:"([^"]+)"|(.*)))?$/) {
|
|
$block = $1 || $2;
|
|
$blockname = $3 || $4;
|
|
}
|
|
}
|
|
if($this->{NormalizeBlock}) {
|
|
$block = $this->{NormalizeBlock}($block);
|
|
if (defined $blockname) {
|
|
$blockname = $this->{NormalizeBlock}($blockname);
|
|
if($blockname eq "") {
|
|
# if, after normalization no blockname is left, remove it
|
|
$blockname = undef;
|
|
}
|
|
}
|
|
}
|
|
if ($this->{InterPolateVars}) {
|
|
# interpolate block(name), add "<" and ">" to the key, because
|
|
# it is sure that such keys does not exist otherwise.
|
|
$block = $this->_interpolate($config, "<$block>", $block);
|
|
if (defined $blockname) {
|
|
$blockname = $this->_interpolate($config, "<$blockname>", "$blockname");
|
|
}
|
|
}
|
|
if ($this->{LowerCaseNames}) {
|
|
$block = lc $block; # only for blocks lc(), if configured via new()
|
|
}
|
|
$this->{level} += 1;
|
|
undef @newcontent;
|
|
next;
|
|
}
|
|
elsif (/^<\/(.+?)>$/) { # it is an end block, but we don't have a matching block!
|
|
croak "Config::General: EndBlock \"<\/$1>\" has no StartBlock statement (level: $this->{level}, chunk $chunk)!\n";
|
|
}
|
|
else { # insert key/value pair into actual node
|
|
if ($this->{LowerCaseNames}) {
|
|
$option = lc $option;
|
|
}
|
|
|
|
if (exists $config->{$option}) {
|
|
if ($this->{MergeDuplicateOptions}) {
|
|
$config->{$option} = $this->_parse_value($config, $option, $value);
|
|
|
|
# bugfix rt.cpan.org#33216
|
|
if ($this->{InterPolateVars}) {
|
|
# save pair on local stack
|
|
$config->{__stack}->{$option} = $config->{$option};
|
|
}
|
|
}
|
|
else {
|
|
if (! $this->{AllowMultiOptions} ) {
|
|
# no, duplicates not allowed
|
|
croak "Config::General: Option \"$option\" occurs more than once (level: $this->{level}, chunk $chunk)!\n";
|
|
}
|
|
else {
|
|
# yes, duplicates allowed
|
|
if (ref($config->{$option}) ne 'ARRAY') { # convert scalar to array
|
|
my $savevalue = $config->{$option};
|
|
delete $config->{$option};
|
|
push @{$config->{$option}}, $savevalue;
|
|
}
|
|
eval {
|
|
# check if arrays are supported by the underlying hash
|
|
my $i = scalar @{$config->{$option}};
|
|
};
|
|
if ($EVAL_ERROR) {
|
|
$config->{$option} = $this->_parse_value($config, $option, $value);
|
|
}
|
|
else {
|
|
# it's already an array, just push
|
|
push @{$config->{$option}}, $this->_parse_value($config, $option, $value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if($this->{ForceArray} && defined $value && $value =~ /^\[\s*(.+?)\s*\]$/) {
|
|
# force single value array entry
|
|
push @{$config->{$option}}, $this->_parse_value($config, $option, $1);
|
|
}
|
|
else {
|
|
# standard config option, insert key/value pair into node
|
|
$config->{$option} = $this->_parse_value($config, $option, $value);
|
|
|
|
if ($this->{InterPolateVars}) {
|
|
# save pair on local stack
|
|
$config->{__stack}->{$option} = $config->{$option};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
elsif (/^<([^\/]+?.*?)>$/) { # found a start block inside a block, don't forget it
|
|
$block_level++; # $block_level indicates wether we are still inside a node
|
|
push @newcontent, $_; # push onto new content stack for later recursive call of _parse()
|
|
}
|
|
elsif (/^<\/(.+?)>$/) {
|
|
if ($block_level) { # this endblock is not the one we are searching for, decrement and push
|
|
$block_level--; # if it is 0, then the endblock was the one we searched for, see below
|
|
push @newcontent, $_; # push onto new content stack
|
|
}
|
|
else { # calling myself recursively, end of $block reached, $block_level is 0
|
|
if (defined $blockname) {
|
|
# a named block, make it a hashref inside a hash within the current node
|
|
|
|
if (! exists $config->{$block}) {
|
|
# Make sure that the hash is not created implicitly
|
|
$config->{$block} = $this->_hashref();
|
|
|
|
if ($this->{InterPolateVars}) {
|
|
# inherit current __stack to new block
|
|
$config->{$block}->{__stack} = $this->_copy($config->{__stack});
|
|
}
|
|
}
|
|
|
|
if (ref($config->{$block}) eq '') {
|
|
croak "Config::General: Block <$block> already exists as scalar entry!\n";
|
|
}
|
|
elsif (ref($config->{$block}) eq 'ARRAY') {
|
|
croak "Config::General: Cannot append named block <$block $blockname> to array of scalars!\n"
|
|
."Block <$block> or scalar '$block' occurs more than once.\n"
|
|
."Turn on -MergeDuplicateBlocks or make sure <$block> occurs only once in the config.\n";
|
|
}
|
|
elsif (exists $config->{$block}->{$blockname}) {
|
|
# the named block already exists, make it an array
|
|
if ($this->{MergeDuplicateBlocks}) {
|
|
# just merge the new block with the same name as an existing one into
|
|
# this one.
|
|
$config->{$block}->{$blockname} = $this->_parse($config->{$block}->{$blockname}, \@newcontent);
|
|
}
|
|
else {
|
|
if (! $this->{AllowMultiOptions}) {
|
|
croak "Config::General: Named block \"<$block $blockname>\" occurs more than once (level: $this->{level}, chunk $chunk)!\n";
|
|
}
|
|
else { # preserve existing data
|
|
my $savevalue = $config->{$block}->{$blockname};
|
|
delete $config->{$block}->{$blockname};
|
|
my @ar;
|
|
if (ref $savevalue eq 'ARRAY') {
|
|
push @ar, @{$savevalue}; # preserve array if any
|
|
}
|
|
else {
|
|
push @ar, $savevalue;
|
|
}
|
|
push @ar, $this->_parse( $this->_hashref(), \@newcontent); # append it
|
|
$config->{$block}->{$blockname} = \@ar;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
# the first occurrence of this particular named block
|
|
my $tmphash = $this->_hashref();
|
|
|
|
if ($this->{InterPolateVars}) {
|
|
# inherit current __stack to new block
|
|
$tmphash->{__stack} = $this->_copy($config->{__stack});
|
|
}
|
|
|
|
$config->{$block}->{$blockname} = $this->_parse($tmphash, \@newcontent);
|
|
}
|
|
}
|
|
else {
|
|
# standard block
|
|
if (exists $config->{$block}) {
|
|
if (ref($config->{$block}) eq '') {
|
|
croak "Config::General: Cannot create hashref from <$block> because there is\n"
|
|
."already a scalar option '$block' with value '$config->{$block}'\n";
|
|
}
|
|
|
|
# the block already exists, make it an array
|
|
if ($this->{MergeDuplicateBlocks}) {
|
|
# just merge the new block with the same name as an existing one into
|
|
# this one.
|
|
$config->{$block} = $this->_parse($config->{$block}, \@newcontent);
|
|
}
|
|
else {
|
|
if (! $this->{AllowMultiOptions}) {
|
|
croak "Config::General: Block \"<$block>\" occurs more than once (level: $this->{level}, chunk $chunk)!\n";
|
|
}
|
|
else {
|
|
my $savevalue = $config->{$block};
|
|
delete $config->{$block};
|
|
my @ar;
|
|
if (ref $savevalue eq "ARRAY") {
|
|
push @ar, @{$savevalue};
|
|
}
|
|
else {
|
|
push @ar, $savevalue;
|
|
}
|
|
|
|
# fixes rt#31529
|
|
my $tmphash = $this->_hashref();
|
|
if ($this->{InterPolateVars}) {
|
|
# inherit current __stack to new block
|
|
$tmphash->{__stack} = $this->_copy($config->{__stack});
|
|
}
|
|
|
|
push @ar, $this->_parse( $tmphash, \@newcontent);
|
|
|
|
$config->{$block} = \@ar;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
# the first occurrence of this particular block
|
|
my $tmphash = $this->_hashref();
|
|
|
|
if ($this->{InterPolateVars}) {
|
|
# inherit current __stack to new block
|
|
$tmphash->{__stack} = $this->_copy($config->{__stack});
|
|
}
|
|
|
|
$config->{$block} = $this->_parse($tmphash, \@newcontent);
|
|
}
|
|
}
|
|
undef $blockname;
|
|
undef $block;
|
|
$this->{level} -= 1;
|
|
next;
|
|
}
|
|
}
|
|
else { # inside $block, just push onto new content stack
|
|
push @newcontent, $_;
|
|
}
|
|
}
|
|
if ($block) {
|
|
# $block is still defined, which means, that it had
|
|
# no matching endblock!
|
|
croak "Config::General: Block \"<$block>\" has no EndBlock statement (level: $this->{level}, chunk $chunk)!\n";
|
|
}
|
|
return $config;
|
|
}
|
|
|
|
|
|
sub _copy {
|
|
#
|
|
# copy the contents of one hash into another
|
|
# to circumvent invalid references
|
|
# fixes rt.cpan.org bug #35122
|
|
my($this, $source) = @_;
|
|
my %hash = ();
|
|
while (my ($key, $value) = each %{$source}) {
|
|
$hash{$key} = $value;
|
|
}
|
|
return \%hash;
|
|
}
|
|
|
|
|
|
sub _parse_value {
|
|
#
|
|
# parse the value if value parsing is turned on
|
|
# by either -AutoTrue and/or -FlagBits
|
|
# otherwise just return the given value unchanged
|
|
#
|
|
my($this, $config, $option, $value) =@_;
|
|
|
|
my $cont;
|
|
($cont, $option, $value) = $this->_hook('pre_parse_value', $option, $value);
|
|
return $value if(!$cont);
|
|
|
|
# avoid "Use of uninitialized value"
|
|
if (! defined $value) {
|
|
# patch fix rt#54583
|
|
# Return an input undefined value without trying transformations
|
|
return $value;
|
|
}
|
|
|
|
if($this->{NormalizeValue}) {
|
|
$value = $this->{NormalizeValue}($value);
|
|
}
|
|
|
|
if ($this->{InterPolateVars}) {
|
|
$value = $this->_interpolate($config, $option, $value);
|
|
}
|
|
|
|
# make true/false values to 1 or 0 (-AutoTrue)
|
|
if ($this->{AutoTrue}) {
|
|
if ($value =~ /$this->{AutoTrueFlags}->{true}/io) {
|
|
$value = 1;
|
|
}
|
|
elsif ($value =~ /$this->{AutoTrueFlags}->{false}/io) {
|
|
$value = 0;
|
|
}
|
|
}
|
|
|
|
# assign predefined flags or undef for every flag | flag ... (-FlagBits)
|
|
if ($this->{FlagBits}) {
|
|
if (exists $this->{FlagBitsFlags}->{$option}) {
|
|
my %__flags = map { $_ => 1 } split /\s*\|\s*/, $value;
|
|
foreach my $flag (keys %{$this->{FlagBitsFlags}->{$option}}) {
|
|
if (exists $__flags{$flag}) {
|
|
$__flags{$flag} = $this->{FlagBitsFlags}->{$option}->{$flag};
|
|
}
|
|
else {
|
|
$__flags{$flag} = undef;
|
|
}
|
|
}
|
|
$value = \%__flags;
|
|
}
|
|
}
|
|
|
|
if (!$this->{NoEscape}) {
|
|
# are there any escaped characters left? put them out as is
|
|
$value =~ s/\\([\$\\\"#])/$1/g;
|
|
}
|
|
|
|
($cont, $option, $value) = $this->_hook('post_parse_value', $option, $value);
|
|
|
|
return $value;
|
|
}
|
|
|
|
|
|
|
|
sub _hook {
|
|
my ($this, $hook, @arguments) = @_;
|
|
if(exists $this->{Plug}->{$hook}) {
|
|
my $sub = $this->{Plug}->{$hook};
|
|
my @hooked = &$sub(@arguments);
|
|
return @hooked;
|
|
}
|
|
return (1, @arguments);
|
|
}
|
|
|
|
|
|
|
|
sub save {
|
|
#
|
|
# this is the old version of save() whose API interface
|
|
# has been changed. I'm very sorry 'bout this.
|
|
#
|
|
# I'll try to figure out, if it has been called correctly
|
|
# and if yes, feed the call to Save(), otherwise croak.
|
|
#
|
|
my($this, $one, @two) = @_;
|
|
|
|
if ( (@two && $one) && ( (scalar @two) % 2 == 0) ) {
|
|
# @two seems to be a hash
|
|
my %h = @two;
|
|
$this->save_file($one, \%h);
|
|
}
|
|
else {
|
|
croak q(Config::General: The save() method is deprecated. Use the new save_file() method instead!);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
sub save_file {
|
|
#
|
|
# save the config back to disk
|
|
#
|
|
my($this, $file, $config) = @_;
|
|
my $fh;
|
|
my $config_string;
|
|
|
|
if (!$file) {
|
|
croak "Config::General: Filename is required!";
|
|
}
|
|
else {
|
|
if ($this->{UTF8}) {
|
|
$fh = IO::File->new;
|
|
open($fh, ">:utf8", $file)
|
|
or croak "Config::General: Could not open $file in UTF8 mode!($!)\n";
|
|
}
|
|
else {
|
|
$fh = IO::File->new( "$file", 'w')
|
|
or croak "Config::General: Could not open $file!($!)\n";
|
|
}
|
|
if (!$config) {
|
|
if (exists $this->{config}) {
|
|
$config_string = $this->_store(0, $this->{config});
|
|
}
|
|
else {
|
|
croak "Config::General: No config hash supplied which could be saved to disk!\n";
|
|
}
|
|
}
|
|
else {
|
|
$config_string = $this->_store(0, $config);
|
|
}
|
|
|
|
if ($config_string) {
|
|
print {$fh} $config_string;
|
|
}
|
|
else {
|
|
# empty config for whatever reason, I don't care
|
|
print {$fh} q();
|
|
}
|
|
|
|
close $fh;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
sub save_string {
|
|
#
|
|
# return the saved config as a string
|
|
#
|
|
my($this, $config) = @_;
|
|
|
|
if (!$config || ref($config) ne 'HASH') {
|
|
if (exists $this->{config}) {
|
|
return $this->_store(0, $this->{config});
|
|
}
|
|
else {
|
|
croak "Config::General: No config hash supplied which could be saved to disk!\n";
|
|
}
|
|
}
|
|
else {
|
|
return $this->_store(0, $config);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
sub _store {
|
|
#
|
|
# internal sub for saving a block
|
|
#
|
|
my($this, $level, $config) = @_;
|
|
local $_;
|
|
my $indent = q( ) x $level;
|
|
|
|
my $config_string = q();
|
|
|
|
foreach my $entry ( $this->{SaveSorted} ? sort keys %$config : keys %$config ) {
|
|
# fix rt#104548
|
|
if ($entry =~ /[<>\n\r]/) {
|
|
croak "Config::General: current key contains invalid characters: $entry!\n";
|
|
}
|
|
|
|
if (ref($config->{$entry}) eq 'ARRAY') {
|
|
if( $this->{ForceArray} && scalar @{$config->{$entry}} == 1 && ! ref($config->{$entry}->[0]) ) {
|
|
# a single value array forced to stay as array
|
|
$config_string .= $this->_write_scalar($level, $entry, '[' . $config->{$entry}->[0] . ']');
|
|
}
|
|
else {
|
|
foreach my $line ( $this->{SaveSorted} ? sort @{$config->{$entry}} : @{$config->{$entry}} ) {
|
|
if (ref($line) eq 'HASH') {
|
|
$config_string .= $this->_write_hash($level, $entry, $line);
|
|
}
|
|
else {
|
|
$config_string .= $this->_write_scalar($level, $entry, $line);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
elsif (ref($config->{$entry}) eq 'HASH') {
|
|
$config_string .= $this->_write_hash($level, $entry, $config->{$entry});
|
|
}
|
|
else {
|
|
$config_string .= $this->_write_scalar($level, $entry, $config->{$entry});
|
|
}
|
|
}
|
|
|
|
return $config_string;
|
|
}
|
|
|
|
|
|
sub _write_scalar {
|
|
#
|
|
# internal sub, which writes a scalar
|
|
# it returns it, in fact
|
|
#
|
|
my($this, $level, $entry, $line) = @_;
|
|
|
|
my $indent = q( ) x $level;
|
|
|
|
my $config_string;
|
|
|
|
# patch fix rt#54583
|
|
if ( ! defined $line ) {
|
|
$config_string .= $indent . $entry . "\n";
|
|
}
|
|
elsif ($line =~ /\n/ || $line =~ /\\$/) {
|
|
# it is a here doc
|
|
my $delimiter;
|
|
my $tmplimiter = 'EOF';
|
|
while (!$delimiter) {
|
|
# create a unique here-doc identifier
|
|
if ($line =~ /$tmplimiter/s) {
|
|
$tmplimiter .= '%';
|
|
}
|
|
else {
|
|
$delimiter = $tmplimiter;
|
|
}
|
|
}
|
|
my @lines = split /\n/, $line;
|
|
$config_string .= $indent . $entry . $this->{StoreDelimiter} . "<<$delimiter\n";
|
|
foreach (@lines) {
|
|
$config_string .= $indent . $_ . "\n";
|
|
}
|
|
$config_string .= $indent . "$delimiter\n";
|
|
}
|
|
else {
|
|
# a simple stupid scalar entry
|
|
|
|
if (!$this->{NoEscape}) {
|
|
# re-escape contained $ or # or \ chars
|
|
$line =~ s/([#\$\\\"])/\\$1/g;
|
|
}
|
|
|
|
# bugfix rt.cpan.org#42287
|
|
if ($line =~ /^\s/ or $line =~ /\s$/) {
|
|
# need to quote it
|
|
$line = "\"$line\"";
|
|
}
|
|
$config_string .= $indent . $entry . $this->{StoreDelimiter} . $line . "\n";
|
|
}
|
|
|
|
return $config_string;
|
|
}
|
|
|
|
sub _write_hash {
|
|
#
|
|
# internal sub, which writes a hash (block)
|
|
# it returns it, in fact
|
|
#
|
|
my($this, $level, $entry, $line) = @_;
|
|
|
|
my $indent = q( ) x $level;
|
|
my $config_string;
|
|
|
|
if ($entry =~ /\s/) {
|
|
# quote the entry if it contains whitespaces
|
|
$entry = q(") . $entry . q(");
|
|
}
|
|
|
|
# check if the next level key points to a hash and is the only one
|
|
# in this case put out a named block
|
|
# fixes rt.77667
|
|
my $num = scalar keys %{$line};
|
|
if($num == 1) {
|
|
my $key = (keys %{$line})[0];
|
|
if(ref($line->{$key}) eq 'HASH') {
|
|
$config_string .= $indent . qq(<$entry $key>\n);
|
|
$config_string .= $this->_store($level + 1, $line->{$key});
|
|
$config_string .= $indent . qq(</) . $entry . ">\n";
|
|
return $config_string;
|
|
}
|
|
}
|
|
|
|
$config_string .= $indent . q(<) . $entry . ">\n";
|
|
$config_string .= $this->_store($level + 1, $line);
|
|
$config_string .= $indent . q(</) . $entry . ">\n";
|
|
|
|
return $config_string
|
|
}
|
|
|
|
|
|
sub _hashref {
|
|
#
|
|
# return a probably tied new empty hash ref
|
|
#
|
|
my($this) = @_;
|
|
if ($this->{Tie}) {
|
|
eval {
|
|
eval qq{require $this->{Tie}};
|
|
};
|
|
if ($EVAL_ERROR) {
|
|
croak q(Config::General: Could not create a tied hash of type: ) . $this->{Tie} . q(: ) . $EVAL_ERROR;
|
|
}
|
|
my %hash;
|
|
tie %hash, $this->{Tie};
|
|
return \%hash;
|
|
}
|
|
else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
|
|
#
|
|
# Procedural interface
|
|
#
|
|
sub ParseConfig {
|
|
#
|
|
# @_ may contain everything which is allowed for new()
|
|
#
|
|
return (new Config::General(@_))->getall();
|
|
}
|
|
|
|
sub SaveConfig {
|
|
#
|
|
# 2 parameters are required, filename and hash ref
|
|
#
|
|
my ($file, $hash) = @_;
|
|
|
|
if (!$file || !$hash) {
|
|
croak q{Config::General::SaveConfig(): filename and hash argument required.};
|
|
}
|
|
else {
|
|
if (ref($hash) ne 'HASH') {
|
|
croak q(Config::General::SaveConfig() The second parameter must be a reference to a hash!);
|
|
}
|
|
else {
|
|
(new Config::General(-ConfigHash => $hash))->save_file($file);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
sub SaveConfigString {
|
|
#
|
|
# same as SaveConfig, but return the config,
|
|
# instead of saving it
|
|
#
|
|
my ($hash) = @_;
|
|
|
|
if (!$hash) {
|
|
croak q{Config::General::SaveConfigString(): Hash argument required.};
|
|
}
|
|
else {
|
|
if (ref($hash) ne 'HASH') {
|
|
croak q(Config::General::SaveConfigString() The parameter must be a reference to a hash!);
|
|
}
|
|
else {
|
|
return (new Config::General(-ConfigHash => $hash))->save_string();
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
# keep this one
|
|
1;
|
|
__END__
|
|
|
|
|
|
|
|
|
|
=head1 NAME
|
|
|
|
Config::General - Generic Config Module
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#
|
|
# the OOP way
|
|
use Config::General;
|
|
$conf = Config::General->new("rcfile");
|
|
my %config = $conf->getall;
|
|
|
|
#
|
|
# the procedural way
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use Config::General qw(ParseConfig SaveConfig SaveConfigString);
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my %config = ParseConfig("rcfile");
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=head1 DESCRIPTION
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This module opens a config file and parses its contents for you. The B<new> method
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requires one parameter which needs to be a filename. The method B<getall> returns a hash
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which contains all options and its associated values of your config file.
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The format of config files supported by B<Config::General> is inspired by the well known Apache config
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format, in fact, this module is 100% compatible to Apache configs, but you can also just use simple
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name/value pairs in your config files.
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In addition to the capabilities of an Apache config file it supports some enhancements such as here-documents,
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C-style comments or multiline options.
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=head1 SUBROUTINES/METHODS
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=over
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=item new()
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Possible ways to call B<new()>:
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$conf = Config::General->new("rcfile");
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$conf = Config::General->new(\%somehash);
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$conf = Config::General->new( %options ); # see below for description of possible options
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This method returns a B<Config::General> object (a hash blessed into "Config::General" namespace.
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All further methods must be used from that returned object. see below.
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You can use the new style with hash parameters or the old style which is of course
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still supported. Possible parameters to B<new()> are:
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* a filename of a configfile, which will be opened and parsed by the parser
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or
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* a hash reference, which will be used as the config.
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An alternative way to call B<new()> is supplying an option- hash with one or more of
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the following keys set:
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=over
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=item B<-ConfigFile>
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A filename or a filehandle, i.e.:
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-ConfigFile => "rcfile" or -ConfigFile => \$FileHandle
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=item B<-ConfigHash>
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A hash reference, which will be used as the config, i.e.:
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-ConfigHash => \%somehash
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=item B<-String>
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A string which contains a whole config, or an arrayref
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containing the whole config line by line.
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The parser will parse the contents of the string instead
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of a file. i.e:
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-String => $complete_config
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it is also possible to feed an array reference to -String:
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-String => \@config_lines
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=item B<-AllowMultiOptions>
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If the value is "no", then multiple identical options are disallowed.
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The default is "yes".
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i.e.:
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-AllowMultiOptions => "yes"
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see B<IDENTICAL OPTIONS> for details.
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=item B<-LowerCaseNames>
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If set to a true value, then all options found in the config will be converted
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to lowercase. This allows you to provide case-in-sensitive configs. The
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values of the options will B<not> lowercased.
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=item B<-UseApacheInclude>
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If set to a true value, the parser will consider "include ..." as valid include
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statement (just like the well known Apache include statement).
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It also supports apache's "IncludeOptional" statement with the same behavior,
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that is, if the include file doesn't exist no error will be thrown.
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=item B<-IncludeRelative>
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If set to a true value, included files with a relative path (i.e. "cfg/blah.conf")
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will be opened from within the location of the configfile instead from within the
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location of the script($0). This works only if the configfile has a absolute pathname
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(i.e. "/etc/main.conf").
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If the variable B<-ConfigPath> has been set and if the file to be included could
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not be found in the location relative to the current config file, the module
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will search within B<-ConfigPath> for the file. See the description of B<-ConfigPath>
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for more details.
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=item B<-IncludeDirectories>
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If set to a true value, you may specify include a directory, in which case all
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files inside the directory will be loaded in ASCII order. Directory includes
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will not recurse into subdirectories. This is comparable to including a
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directory in Apache-style config files.
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=item B<-IncludeGlob>
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If set to a true value, you may specify a glob pattern for an include to
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include all matching files (e.g. <<include conf.d/*.conf>>). Also note that as
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with standard file patterns, * will not match dot-files, so <<include dir/*>>
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is often more desirable than including a directory with B<-IncludeDirectories>.
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An include option will not cause a parser error if the glob didn't return anything.
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=item B<-IncludeAgain>
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If set to a true value, you will be able to include a sub-configfile
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multiple times. With the default, false, you will get a warning about
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duplicate includes and only the first include will succeed.
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Reincluding a configfile can be useful if it contains data that you want to
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be present in multiple places in the data tree. See the example under
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L</INCLUDES>.
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Note, however, that there is currently no check for include recursion.
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=item B<-ConfigPath>
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As mentioned above, you can use this variable to specify a search path for relative
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config files which have to be included. Config::General will search within this
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path for the file if it cannot find the file at the location relative to the
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current config file.
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To provide multiple search paths you can specify an array reference for the
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path. For example:
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@path = qw(/usr/lib/perl /nfs/apps/lib /home/lib);
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..
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-ConfigPath => \@path
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=item B<-MergeDuplicateBlocks>
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If set to a true value, then duplicate blocks, that means blocks and named blocks,
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will be merged into a single one (see below for more details on this).
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The default behavior of Config::General is to create an array if some junk in a
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config appears more than once.
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=item B<-MergeDuplicateOptions>
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If set to a true value, then duplicate options will be merged. That means, if the
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same option occurs more than once, the last one will be used in the resulting
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config hash.
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Setting this option implies B<-AllowMultiOptions == false> unless you set
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B<-AllowMultiOptions> explicit to 'true'. In this case duplicate blocks are
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allowed and put into an array but duplicate options will be merged.
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=item B<-AutoLaunder>
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If set to a true value, then all values in your config file will be laundered
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to allow them to be used under a -T taint flag. This could be regarded as circumventing
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the purpose of the -T flag, however, if the bad guys can mess with your config file,
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you have problems that -T will not be able to stop. AutoLaunder will only handle
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a config file being read from -ConfigFile.
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=item B<-AutoTrue>
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If set to a true value, then options in your config file, whose values are set to
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true or false values, will be normalised to 1 or 0 respectively.
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The following values will be considered as B<true>:
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yes, on, 1, true
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The following values will be considered as B<false>:
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no, off, 0, false
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This effect is case-insensitive, i.e. both "Yes" or "No" will result in 1.
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=item B<-FlagBits>
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This option takes one required parameter, which must be a hash reference.
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The supplied hash reference needs to define variables for which you
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want to preset values. Each variable you have defined in this hash-ref
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and which occurs in your config file, will cause this variable being
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set to the preset values to which the value in the config file refers to.
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Multiple flags can be used, separated by the pipe character |.
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Well, an example will clarify things:
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my $conf = Config::General->new(
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-ConfigFile => "rcfile",
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-FlagBits => {
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Mode => {
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CLEAR => 1,
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STRONG => 1,
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UNSECURE => "32bit" }
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}
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);
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In this example we are defining a variable named I<"Mode"> which
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may contain one or more of "CLEAR", "STRONG" and "UNSECURE" as value.
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The appropriate config entry may look like this:
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# rcfile
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Mode = CLEAR | UNSECURE
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The parser will create a hash which will be the value of the key "Mode". This
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hash will contain B<all> flags which you have pre-defined, but only those
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which were set in the config will contain the pre-defined value, the other
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ones will be undefined.
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The resulting config structure would look like this after parsing:
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%config = (
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Mode => {
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CLEAR => 1,
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UNSECURE => "32bit",
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STRONG => undef,
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}
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);
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This method allows the user (or, the "maintainer" of the configfile for your
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application) to set multiple pre-defined values for one option.
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Please beware, that all occurrences of those variables will be handled this
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way, there is no way to distinguish between variables in different scopes.
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That means, if "Mode" would also occur inside a named block, it would
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also parsed this way.
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Values which are not defined in the hash-ref supplied to the parameter B<-FlagBits>
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and used in the corresponding variable in the config will be ignored.
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Example:
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# rcfile
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Mode = BLAH | CLEAR
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would result in this hash structure:
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%config = (
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Mode => {
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CLEAR => 1,
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UNSECURE => undef,
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STRONG => undef,
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}
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);
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"BLAH" will be ignored silently.
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=item B<-DefaultConfig>
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This can be a hash reference or a simple scalar (string) of a config. This
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causes the module to preset the resulting config hash with the given values,
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which allows you to set default values for particular config options directly.
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Note that you probably want to use this with B<-MergeDuplicateOptions>, otherwise
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a default value already in the configuration file will produce an array of two
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values.
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=item B<-Tie>
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B<-Tie> takes the name of a Tie class as argument that each new hash should be
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based off of.
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This hash will be used as the 'backing hash' instead of a standard Perl hash,
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which allows you to affect the way, variable storing will be done. You could, for
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example supply a tied hash, say Tie::DxHash, which preserves ordering of the
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keys in the config (which a standard Perl hash won't do). Or, you could supply
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a hash tied to a DBM file to save the parsed variables to disk.
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There are many more things to do in tie-land, see L<tie> to get some interesting
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ideas.
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If you want to use the B<-Tie> feature together with B<-DefaultConfig> make sure
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that the hash supplied to B<-DefaultConfig> must be tied to the same Tie class.
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Make sure that the hash which receives the generated hash structure (e.g. which
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you are using in the assignment: %hash = $config->getall()) must be tied to
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the same Tie class.
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Example:
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use Config::General qw(ParseConfig);
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use Tie::IxHash;
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tie my %hash, "Tie::IxHash";
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%hash = ParseConfig(
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-ConfigFile => shift(),
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-Tie => "Tie::IxHash"
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);
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=item B<-InterPolateVars>
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If set to a true value, variable interpolation will be done on your config
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input. See L<Config::General::Interpolated> for more information.
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=item B<-InterPolateEnv>
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If set to a true value, environment variables can be used in
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configs.
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This implies B<-InterPolateVars>.
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=item B<-AllowSingleQuoteInterpolation>
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By default variables inside single quotes will not be interpolated. If
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you turn on this option, they will be interpolated as well.
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=item B<-ExtendedAccess>
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If set to a true value, you can use object oriented (extended) methods to
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access the parsed config. See L<Config::General::Extended> for more information.
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=item B<-StrictObjects>
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By default this is turned on, which causes Config::General to croak with an
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error if you try to access a non-existent key using the OOP-way (B<-ExtendedAcess>
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enabled). If you turn B<-StrictObjects> off (by setting to 0 or "no") it will
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just return an empty object/hash/scalar. This is valid for OOP-access 8via AUTOLOAD
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and for the methods obj(), hash() and value().
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=item B<-StrictVars>
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By default this is turned on, which causes Config::General to croak with an
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error if an undefined variable with B<InterPolateVars> turned on occurs
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in a config. Set to I<false> (i.e. 0) to avoid such error messages.
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=item B<-SplitPolicy>
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You can influence the way how Config::General decides which part of a line
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in a config file is the key and which one is the value. By default it tries
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its best to guess. That means you can mix equalsign assignments and whitespace
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assignments.
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However, sometime you may wish to make it more strictly for some reason. In
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this case you can set B<-SplitPolicy>. The possible values are: 'guess' which
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is the default, 'whitespace' which causes the module to split by whitespace,
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'equalsign' which causes it to split strictly by equal sign, or 'custom'. In the
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latter case you must also set B<-SplitDelimiter> to some regular expression
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of your choice. For example:
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-SplitDelimiter => '\s*:\s*'
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will cause the module to split by colon while whitespace which surrounds
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the delimiter will be removed.
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Please note that the delimiter used when saving a config (save_file() or save_string())
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will be chosen according to the current B<-SplitPolicy>. If -SplitPolicy is
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set to 'guess' or 'whitespace', 3 spaces will be used to delimit saved
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options. If 'custom' is set, then you need to set B<-StoreDelimiter>.
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=item B<-SplitDelimiter>
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Set this to any arbitrary regular expression which will be used for option/value
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splitting. B<-SplitPolicy> must be set to 'custom' to make this work.
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=item B<-StoreDelimiter>
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You can use this parameter to specify a custom delimiter to use when saving
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configs to a file or string. You only need to set it if you want to store
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the config back to disk and if you have B<-SplitPolicy> set to 'custom'.
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However, this parameter takes precedence over whatever is set for B<-SplitPolicy>.
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Be very careful with this parameter.
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=item B<-CComments>
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Config::General is able to notice c-style comments (see section COMMENTS).
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But for some reason you might no need this. In this case you can turn
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this feature off by setting B<-CComments> to a false value('no', 0, 'off').
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By default B<-CComments> is turned on.
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=item B<-BackslashEscape>
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B<Deprecated Option>.
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=item B<-SlashIsDirectory>
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If you turn on this parameter, a single slash as the last character
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of a named block will be considered as a directory name.
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By default this flag is turned off, which makes the module somewhat
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incompatible to Apache configs, since such a setup will be normally
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considered as an explicit empty block, just as XML defines it.
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For example, if you have the following config:
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<Directory />
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Index index.awk
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</Directory>
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you will get such an error message from the parser:
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EndBlock "</Directory>" has no StartBlock statement (level: 1, chunk 10)!
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This is caused by the fact that the config chunk below will be
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internally converted to:
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<Directory></Directory>
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Index index.awk
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</Directory>
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Now there is one '</Directory>' too much. The proper solution is
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to use quotation to circumvent this error:
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<Directory "/">
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Index index.awk
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</Directory>
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However, a raw apache config comes without such quotes. In this
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case you may consider to turn on B<-SlashIsDirectory>.
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Please note that this is a new option (incorporated in version 2.30),
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it may lead to various unexpected side effects or other failures.
|
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You've been warned.
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=item B<-UseApacheIfDefine>
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Enables support for Apache <IfDefine> ... </IfDefine>. See -Define.
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=item B<-Define>
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Defines the symbols to be used for conditional configuration files.
|
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Allowed arguments: scalar, scalar ref, array ref or hash ref.
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Examples:
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-Define => 'TEST'
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-Define => \$testOrProduction
|
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-Define => [qw(TEST VERBOSE)]
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-Define => {TEST => 1, VERBOSE => 1}
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|
|
Sample configuration:
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|
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<Logging>
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<IfDefine TEST>
|
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Level Debug
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include test/*.cfg
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</IfDef>
|
|
<IfDefine !TEST>
|
|
Level Notice
|
|
include production/*.cfg
|
|
</IfDefine>
|
|
</Logging>
|
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|
|
=item B<-ApacheCompatible>
|
|
|
|
Over the past years a lot of options has been incorporated
|
|
into Config::General to be able to parse real Apache configs.
|
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|
|
The new B<-ApacheCompatible> option now makes it possible to
|
|
tweak all options in a way that Apache configs can be parsed.
|
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|
|
This is called "apache compatibility mode" - if you will ever
|
|
have problems with parsing Apache configs without this option
|
|
being set, you'll get no help by me. Thanks :)
|
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|
|
The following options will be set:
|
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|
|
UseApacheInclude = 1
|
|
IncludeRelative = 1
|
|
IncludeDirectories = 1
|
|
IncludeGlob = 1
|
|
SlashIsDirectory = 1
|
|
SplitPolicy = 'whitespace'
|
|
CComments = 0
|
|
UseApacheIfDefine = 1
|
|
|
|
Take a look into the particular documentation sections what
|
|
those options are doing.
|
|
|
|
Beside setting some options it also turns off support for
|
|
explicit empty blocks.
|
|
|
|
=item B<-UTF8>
|
|
|
|
If turned on, all files will be opened in utf8 mode. This may
|
|
not work properly with older versions of Perl.
|
|
|
|
=item B<-SaveSorted>
|
|
|
|
If you want to save configs in a sorted manner, turn this
|
|
parameter on. It is not enabled by default.
|
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|
|
=item B<-NoEscape>
|
|
|
|
If you want to use the data ( scalar or final leaf ) without escaping special character, turn this
|
|
parameter on. It is not enabled by default.
|
|
|
|
=item B<-NormalizeBlock>
|
|
|
|
Takes a subroutine reference as parameter and gets the current
|
|
block or blockname passed as parameter and is expected to return
|
|
it in some altered way as a scalar string. The sub will be called
|
|
before anything else will be done by the module itself (e.g. interpolation).
|
|
|
|
Example:
|
|
|
|
-NormalizeBlock => sub { my $x = shift; $x =~ s/\s*$//; $x; }
|
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|
|
This removes trailing whitespaces of block names.
|
|
|
|
=item B<-NormalizeOption>
|
|
|
|
Same as B<-NormalizeBlock> but applied on options only.
|
|
|
|
=item B<-NormalizeValue>
|
|
|
|
Same as B<-NormalizeBlock> but applied on values only.
|
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|
|
=back
|
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|
|
|
|
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|
|
=item getall()
|
|
|
|
Returns a hash structure which represents the whole config.
|
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|
|
=item files()
|
|
|
|
Returns a list of all files read in.
|
|
|
|
=item save_file()
|
|
|
|
Writes the config hash back to the hard disk. This method takes one or two
|
|
parameters. The first parameter must be the filename where the config
|
|
should be written to. The second parameter is optional, it must be a
|
|
reference to a hash structure, if you set it. If you do not supply this second parameter
|
|
then the internal config hash, which has already been parsed, will be
|
|
used.
|
|
|
|
Please note that any occurrence of comments will be ignored by getall()
|
|
and thus be lost after you call this method.
|
|
|
|
You need also to know that named blocks will be converted to nested blocks
|
|
(which is the same from the perl point of view). An example:
|
|
|
|
<user hans>
|
|
id 13
|
|
</user>
|
|
|
|
will become the following after saving:
|
|
|
|
<user>
|
|
<hans>
|
|
id 13
|
|
</hans>
|
|
</user>
|
|
|
|
Example:
|
|
|
|
$conf_obj->save_file("newrcfile", \%config);
|
|
|
|
or, if the config has already been parsed, or if it didn't change:
|
|
|
|
$conf_obj->save_file("newrcfile");
|
|
|
|
|
|
=item save_string()
|
|
|
|
This method is equivalent to the previous save_file(), but it does not
|
|
store the generated config to a file. Instead it returns it as a string,
|
|
which you can save yourself afterwards.
|
|
|
|
It takes one optional parameter, which must be a reference to a hash structure.
|
|
If you omit this parameter, the internal config hash, which has already been parsed,
|
|
will be used.
|
|
|
|
Example:
|
|
|
|
my $content = $conf_obj->save_string(\%config);
|
|
|
|
or:
|
|
|
|
my $content = $conf_obj->save_string();
|
|
|
|
|
|
=back
|
|
|
|
|
|
=head1 CONFIG FILE FORMAT
|
|
|
|
Lines beginning with B<#> and empty lines will be ignored. (see section COMMENTS!)
|
|
Spaces at the beginning and the end of a line will also be ignored as well as tabulators.
|
|
If you need spaces at the end or the beginning of a value you can surround it with
|
|
double quotes.
|
|
An option line starts with its name followed by a value. An equal sign is optional.
|
|
Some possible examples:
|
|
|
|
user max
|
|
user = max
|
|
user max
|
|
|
|
If there are more than one statements with the same name, it will create an array
|
|
instead of a scalar. See the example below.
|
|
|
|
The method B<getall> returns a hash of all values.
|
|
|
|
|
|
=head1 BLOCKS
|
|
|
|
You can define a B<block> of options. A B<block> looks much like a block
|
|
in the wellknown Apache config format. It starts with E<lt>B<blockname>E<gt> and ends
|
|
with E<lt>/B<blockname>E<gt>.
|
|
|
|
A block start and end cannot be on the same line.
|
|
|
|
An example:
|
|
|
|
<database>
|
|
host = muli
|
|
user = moare
|
|
dbname = modb
|
|
dbpass = D4r_9Iu
|
|
</database>
|
|
|
|
Blocks can also be nested. Here is a more complicated example:
|
|
|
|
user = hans
|
|
server = mc200
|
|
db = maxis
|
|
passwd = D3rf$
|
|
<jonas>
|
|
user = tom
|
|
db = unknown
|
|
host = mila
|
|
<tablestructure>
|
|
index int(100000)
|
|
name char(100)
|
|
prename char(100)
|
|
city char(100)
|
|
status int(10)
|
|
allowed moses
|
|
allowed ingram
|
|
allowed joice
|
|
</tablestructure>
|
|
</jonas>
|
|
|
|
The hash which the method B<getall> returns look like that:
|
|
|
|
print Data::Dumper(\%hash);
|
|
$VAR1 = {
|
|
'passwd' => 'D3rf$',
|
|
'jonas' => {
|
|
'tablestructure' => {
|
|
'prename' => 'char(100)',
|
|
'index' => 'int(100000)',
|
|
'city' => 'char(100)',
|
|
'name' => 'char(100)',
|
|
'status' => 'int(10)',
|
|
'allowed' => [
|
|
'moses',
|
|
'ingram',
|
|
'joice',
|
|
]
|
|
},
|
|
'host' => 'mila',
|
|
'db' => 'unknown',
|
|
'user' => 'tom'
|
|
},
|
|
'db' => 'maxis',
|
|
'server' => 'mc200',
|
|
'user' => 'hans'
|
|
};
|
|
|
|
If you have turned on B<-LowerCaseNames> (see new()) then blocks as in the
|
|
following example:
|
|
|
|
<Dir>
|
|
<AttriBUTES>
|
|
Owner root
|
|
</attributes>
|
|
</dir>
|
|
|
|
would produce the following hash structure:
|
|
|
|
$VAR1 = {
|
|
'dir' => {
|
|
'attributes' => {
|
|
'owner' => "root",
|
|
}
|
|
}
|
|
};
|
|
|
|
As you can see, the keys inside the config hash are normalized.
|
|
|
|
Please note, that the above config block would result in a
|
|
valid hash structure, even if B<-LowerCaseNames> is not set!
|
|
This is because I<Config::General> does not
|
|
use the block names to check if a block ends, instead it uses an internal
|
|
state counter, which indicates a block end.
|
|
|
|
If the module cannot find an end-block statement, then this block will be ignored.
|
|
|
|
|
|
|
|
=head1 NAMED BLOCKS
|
|
|
|
If you need multiple blocks of the same name, then you have to name every block.
|
|
This works much like Apache config. If the module finds a named block, it will
|
|
create a hashref with the left part of the named block as the key containing
|
|
one or more hashrefs with the right part of the block as key containing everything
|
|
inside the block(which may again be nested!). As examples says more than words:
|
|
|
|
# given the following sample
|
|
<Directory /usr/frisco>
|
|
Limit Deny
|
|
Options ExecCgi Index
|
|
</Directory>
|
|
<Directory /usr/frik>
|
|
Limit DenyAll
|
|
Options None
|
|
</Directory>
|
|
|
|
# you will get:
|
|
|
|
$VAR1 = {
|
|
'Directory' => {
|
|
'/usr/frik' => {
|
|
'Options' => 'None',
|
|
'Limit' => 'DenyAll'
|
|
},
|
|
'/usr/frisco' => {
|
|
'Options' => 'ExecCgi Index',
|
|
'Limit' => 'Deny'
|
|
}
|
|
}
|
|
};
|
|
|
|
You cannot have more than one named block with the same name because it will
|
|
be stored in a hashref and therefore be overwritten if a block occurs once more.
|
|
|
|
|
|
=head1 WHITESPACE IN BLOCKS
|
|
|
|
The normal behavior of Config::General is to look for whitespace in
|
|
block names to decide if it's a named block or just a simple block.
|
|
|
|
Sometimes you may need blocknames which have whitespace in their names.
|
|
|
|
With named blocks this is no problem, as the module only looks for the
|
|
first whitespace:
|
|
|
|
<person hugo gera>
|
|
</person>
|
|
|
|
would be parsed to:
|
|
|
|
$VAR1 = {
|
|
'person' => {
|
|
'hugo gera' => {
|
|
},
|
|
}
|
|
};
|
|
|
|
The problem occurs, if you want to have a simple block containing whitespace:
|
|
|
|
<hugo gera>
|
|
</hugo gera>
|
|
|
|
This would be parsed as a named block, which is not what you wanted. In this
|
|
very case you may use quotation marks to indicate that it is not a named block:
|
|
|
|
<"hugo gera">
|
|
</"hugo gera">
|
|
|
|
The save() method of the module inserts automatically quotation marks in such
|
|
cases.
|
|
|
|
|
|
=head1 EXPLICIT EMPTY BLOCKS
|
|
|
|
Beside the notation of blocks mentioned above it is possible to use
|
|
explicit empty blocks.
|
|
|
|
Normally you would write this in your config to define an empty
|
|
block:
|
|
|
|
<driver Apache>
|
|
</driver>
|
|
|
|
To save writing you can also write:
|
|
|
|
<driver Apache/>
|
|
|
|
which is the very same as above. This works for normal blocks and
|
|
for named blocks.
|
|
|
|
|
|
|
|
=head1 IDENTICAL OPTIONS (ARRAYS)
|
|
|
|
You may have more than one line of the same option with different values.
|
|
Example:
|
|
|
|
log log1
|
|
log log2
|
|
log log2
|
|
|
|
You will get a scalar if the option occurred only once or an array if it occurred
|
|
more than once. If you expect multiple identical options, then you may need to
|
|
check if an option occurred more than once:
|
|
|
|
$allowed = $hash{jonas}->{tablestructure}->{allowed};
|
|
if (ref($allowed) eq "ARRAY") {
|
|
@ALLOWED = @{$allowed};
|
|
else {
|
|
@ALLOWED = ($allowed);
|
|
}
|
|
}
|
|
|
|
The same applies to blocks and named blocks too (they are described in more detail
|
|
below). For example, if you have the following config:
|
|
|
|
<dir blah>
|
|
user max
|
|
</dir>
|
|
<dir blah>
|
|
user hannes
|
|
</dir>
|
|
|
|
then you would end up with a data structure like this:
|
|
|
|
$VAR1 = {
|
|
'dir' => {
|
|
'blah' => [
|
|
{
|
|
'user' => 'max'
|
|
},
|
|
{
|
|
'user' => 'hannes'
|
|
}
|
|
]
|
|
}
|
|
};
|
|
|
|
As you can see, the two identical blocks are stored in a hash which contains
|
|
an array(-reference) of hashes.
|
|
|
|
Under some rare conditions you might not want this behavior with blocks (and
|
|
named blocks too). If you want to get one single hash with the contents of
|
|
both identical blocks, then you need to turn the B<new()> parameter B<-MergeDuplicateBlocks>
|
|
on (see above). The parsed structure of the example above would then look like
|
|
this:
|
|
|
|
|
|
$VAR1 = {
|
|
'dir' => {
|
|
'blah' => {
|
|
'user' => [
|
|
'max',
|
|
'hannes'
|
|
]
|
|
}
|
|
}
|
|
};
|
|
|
|
As you can see, there is only one hash "dir->{blah}" containing multiple
|
|
"user" entries. As you can also see, turning on B<-MergeDuplicateBlocks>
|
|
does not affect scalar options (i.e. "option = value"). In fact you can
|
|
tune merging of duplicate blocks and options independent from each other.
|
|
|
|
If you don't want to allow more than one identical options, you may turn it off
|
|
by setting the flag I<AllowMultiOptions> in the B<new()> method to "no".
|
|
If turned off, Config::General will complain about multiple occurring options
|
|
with identical names!
|
|
|
|
=head2 FORCE SINGLE VALUE ARRAYS
|
|
|
|
You may also force a single config line to get parsed into an array by
|
|
turning on the option B<-ForceArray> and by surrounding the value of the
|
|
config entry by []. Example:
|
|
|
|
hostlist = [ foo.bar ]
|
|
|
|
Will be a singlevalue array entry if the option is turned on. If you want
|
|
it to remain to be an array you have to turn on B<-ForceArray> during save too.
|
|
|
|
=head1 LONG LINES
|
|
|
|
If you have a config value, which is too long and would take more than one line,
|
|
you can break it into multiple lines by using the backslash character at the end
|
|
of the line. The Config::General module will concatenate those lines to one single-value.
|
|
|
|
Example:
|
|
|
|
command = cat /var/log/secure/tripwire | \
|
|
mail C<-s> "report from tripwire" \
|
|
honey@myotherhost.nl
|
|
|
|
command will become:
|
|
"cat /var/log/secure/tripwire | mail C<-s> 'report from twire' honey@myotherhost.nl"
|
|
|
|
|
|
=head1 HERE DOCUMENTS
|
|
|
|
You can also define a config value as a so called "here-document". You must tell
|
|
the module an identifier which indicates the end of a here document. An
|
|
identifier must follow a "<<".
|
|
|
|
Example:
|
|
|
|
message <<EOF
|
|
we want to
|
|
remove the
|
|
homedir of
|
|
root.
|
|
EOF
|
|
|
|
Everything between the two "EOF" strings will be in the option I<message>.
|
|
|
|
There is a special feature which allows you to use indentation with here documents.
|
|
You can have any amount of whitespace or tabulators in front of the end
|
|
identifier. If the module finds spaces or tabs then it will remove exactly those
|
|
amount of spaces from every line inside the here-document.
|
|
|
|
Example:
|
|
|
|
message <<EOF
|
|
we want to
|
|
remove the
|
|
homedir of
|
|
root.
|
|
EOF
|
|
|
|
After parsing, message will become:
|
|
|
|
we want to
|
|
remove the
|
|
homedir of
|
|
root.
|
|
|
|
because there were the string " " in front of EOF, which were cut from every
|
|
line inside the here-document.
|
|
|
|
|
|
|
|
=head1 INCLUDES
|
|
|
|
You can include an external file at any position in your config file using the following statement
|
|
in your config file:
|
|
|
|
<<include externalconfig.rc>>
|
|
|
|
If you turned on B<-UseApacheInclude> (see B<new()>), then you can also use the following
|
|
statement to include an external file:
|
|
|
|
include externalconfig.rc
|
|
|
|
This file will be inserted at the position where it was found as if the contents of this file
|
|
were directly at this position.
|
|
|
|
You can also recursively include files, so an included file may include another one and so on.
|
|
Beware that you do not recursively load the same file, you will end with an error message like
|
|
"too many open files in system!".
|
|
|
|
By default included files with a relative pathname will be opened from within the current
|
|
working directory. Under some circumstances it maybe possible to
|
|
open included files from the directory, where the configfile resides. You need to turn on
|
|
the option B<-IncludeRelative> (see B<new()>) if you want that. An example:
|
|
|
|
my $conf = Config::General(
|
|
-ConfigFile => "/etc/crypt.d/server.cfg"
|
|
-IncludeRelative => 1
|
|
);
|
|
|
|
/etc/crypt.d/server.cfg:
|
|
|
|
<<include acl.cfg>>
|
|
|
|
In this example Config::General will try to include I<acl.cfg> from I</etc/crypt.d>:
|
|
|
|
/etc/crypt.d/acl.cfg
|
|
|
|
The default behavior (if B<-IncludeRelative> is B<not> set!) will be to open just I<acl.cfg>,
|
|
wherever it is, i.e. if you did a chdir("/usr/local/etc"), then Config::General will include:
|
|
|
|
/usr/local/etc/acl.cfg
|
|
|
|
Include statements can be case insensitive (added in version 1.25).
|
|
|
|
Include statements will be ignored within C-Comments and here-documents.
|
|
|
|
By default, a config file will only be included the first time it is
|
|
referenced. If you wish to include a file in multiple places, set
|
|
B</-IncludeAgain> to true. But be warned: this may lead to infinite loops,
|
|
so make sure, you're not including the same file from within itself!
|
|
|
|
Example:
|
|
|
|
# main.cfg
|
|
<object billy>
|
|
class=Some::Class
|
|
<printers>
|
|
include printers.cfg
|
|
</printers>
|
|
# ...
|
|
</object>
|
|
<object bob>
|
|
class=Another::Class
|
|
<printers>
|
|
include printers.cfg
|
|
</printers>
|
|
# ...
|
|
</object>
|
|
|
|
Now C<printers.cfg> will be include in both the C<billy> and C<bob> objects.
|
|
|
|
You will have to be careful to not recursively include a file. Behaviour
|
|
in this case is undefined.
|
|
|
|
|
|
|
|
=head1 COMMENTS
|
|
|
|
A comment starts with the number sign B<#>, there can be any number of spaces and/or
|
|
tab stops in front of the #.
|
|
|
|
A comment can also occur after a config statement. Example:
|
|
|
|
username = max # this is the comment
|
|
|
|
If you want to comment out a large block you can use C-style comments. A B</*> signals
|
|
the begin of a comment block and the B<*/> signals the end of the comment block.
|
|
Example:
|
|
|
|
user = max # valid option
|
|
db = tothemax
|
|
/*
|
|
user = andors
|
|
db = toand
|
|
*/
|
|
|
|
In this example the second options of user and db will be ignored. Please beware of the fact,
|
|
if the Module finds a B</*> string which is the start of a comment block, but no matching
|
|
end block, it will ignore the whole rest of the config file!
|
|
|
|
B<NOTE:> If you require the B<#> character (number sign) to remain in the option value, then
|
|
you can use a backslash in front of it, to escape it. Example:
|
|
|
|
bgcolor = \#ffffcc
|
|
|
|
In this example the value of $config{bgcolor} will be "#ffffcc", Config::General will not treat
|
|
the number sign as the begin of a comment because of the leading backslash.
|
|
|
|
Inside here-documents escaping of number signs is NOT required!
|
|
|
|
|
|
=head1 PARSER PLUGINS
|
|
|
|
You can alter the behavior of the parser by supplying closures
|
|
which will be called on certain hooks during config file processing
|
|
and parsing.
|
|
|
|
The general aproach works like this:
|
|
|
|
sub ck {
|
|
my($file, $base) = @_;
|
|
print "_open() tries $file ... ";
|
|
if ($file =~ /blah/) {
|
|
print "ignored\n";
|
|
return (0);
|
|
} else {
|
|
print "allowed\n";
|
|
return (1, @_);
|
|
}
|
|
}
|
|
|
|
my %c = ParseConfig(
|
|
-IncludeGlob => 1,
|
|
-UseApacheInclude => 1,
|
|
-ConfigFile => shift,
|
|
-Plug => { pre_open => *ck }
|
|
);
|
|
|
|
Output:
|
|
|
|
_open() tries cfg ... allowed
|
|
_open() tries x/*.conf ... allowed
|
|
_open() tries x/1.conf ... allowed
|
|
_open() tries x/2.conf ... allowed
|
|
_open() tries x/blah.conf ... ignored
|
|
|
|
As you can see, we wrote a little sub which takes a filename
|
|
and a base directory as parameters. We tell Config::General via
|
|
the B<Plug> parameter of B<new()> to call this sub everytime
|
|
before it attempts to open a file.
|
|
|
|
General processing continues as usual if the first value of
|
|
the returned array is true. The second value of that array
|
|
depends on the kind of hook being called.
|
|
|
|
The following hooks are available so far:
|
|
|
|
=over
|
|
|
|
=item B<pre_open>
|
|
|
|
Takes two parameters: filename and basedirectory.
|
|
|
|
Has to return an array consisting of 3 values:
|
|
|
|
- 1 or 0 (continue processing or not)
|
|
- filename
|
|
- base directory
|
|
|
|
=item B<pre_read>
|
|
|
|
Takes two parameters: the filehandle of the file to be read
|
|
and an array containing the raw contents of said file.
|
|
|
|
This hook will be applied in _read(). File contents are already
|
|
available at this stage, comments will be removed, here-docs normalized
|
|
and the like. This hook gets the unaltered, original contents.
|
|
|
|
Has to return an array of 3 values:
|
|
|
|
- 1 or 0 (continue processing or not)
|
|
- the filehandle
|
|
- an array of strings
|
|
|
|
You can use this hook to apply your own normalizations or whatever.
|
|
|
|
Be careful when returning the abort value (1st value of returned array 0),
|
|
since in this case nothing else would be done on the contents. If it still
|
|
contains comments or something, they will be parsed as legal config options.
|
|
|
|
=item B<post_read>
|
|
|
|
Takes one parameter: a reference to an array containing the prepared
|
|
config lines (after being processed by _read()).
|
|
|
|
This hook will be applied in _read() when everything else has been done.
|
|
|
|
Has to return an array of 2 values:
|
|
|
|
- 1 or 0 (continue processing or not) [Ignored for post hooks]
|
|
- a reference to an array containing the config lines
|
|
|
|
=item B<pre_parse_value>
|
|
|
|
Takes 2 parameters: an option name and its value.
|
|
|
|
This hook will be applied in _parse_value() before any processing.
|
|
|
|
Has to return an array of 3 values:
|
|
|
|
- 1 or 0 (continue processing or not)
|
|
- option name
|
|
- value of the option
|
|
|
|
=item B<post_parse_value>
|
|
|
|
Almost identical to pre_parse_value, but will be applied after _parse_value()
|
|
is finished and all usual processing and normalization is done.
|
|
|
|
=back
|
|
|
|
Not implemented yet: hooks for variable interpolation and block
|
|
parsing.
|
|
|
|
|
|
=head1 OBJECT ORIENTED INTERFACE
|
|
|
|
There is a way to access a parsed config the OO-way.
|
|
Use the module B<Config::General::Extended>, which is
|
|
supplied with the Config::General distribution.
|
|
|
|
=head1 VARIABLE INTERPOLATION
|
|
|
|
You can use variables inside your config files if you like. To do
|
|
that you have to use the module B<Config::General::Interpolated>,
|
|
which is supplied with the Config::General distribution.
|
|
|
|
|
|
=head1 EXPORTED FUNCTIONS
|
|
|
|
Config::General exports some functions too, which makes it somewhat
|
|
easier to use it, if you like this.
|
|
|
|
How to import the functions:
|
|
|
|
use Config::General qw(ParseConfig SaveConfig SaveConfigString);
|
|
|
|
=over
|
|
|
|
=item B<ParseConfig()>
|
|
|
|
This function takes exactly all those parameters, which are
|
|
allowed to the B<new()> method of the standard interface.
|
|
|
|
Example:
|
|
|
|
use Config::General qw(ParseConfig);
|
|
my %config = ParseConfig(-ConfigFile => "rcfile", -AutoTrue => 1);
|
|
|
|
|
|
=item B<SaveConfig()>
|
|
|
|
This function requires two arguments, a filename and a reference
|
|
to a hash structure.
|
|
|
|
Example:
|
|
|
|
use Config::General qw(SaveConfig);
|
|
..
|
|
SaveConfig("rcfile", \%some_hash);
|
|
|
|
|
|
=item B<SaveConfigString()>
|
|
|
|
This function requires a reference to a config hash as parameter.
|
|
It generates a configuration based on this hash as the object-interface
|
|
method B<save_string()> does.
|
|
|
|
Example:
|
|
|
|
use Config::General qw(ParseConfig SaveConfigString);
|
|
my %config = ParseConfig(-ConfigFile => "rcfile");
|
|
.. # change %config something
|
|
my $content = SaveConfigString(\%config);
|
|
|
|
|
|
=back
|
|
|
|
=head1 CONFIGURATION AND ENVIRONMENT
|
|
|
|
No environment variables will be used.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
I recommend you to read the following documents, which are supplied with Perl:
|
|
|
|
perlreftut Perl references short introduction
|
|
perlref Perl references, the rest of the story
|
|
perldsc Perl data structures intro
|
|
perllol Perl data structures: arrays of arrays
|
|
|
|
Config::General::Extended Object oriented interface to parsed configs
|
|
Config::General::Interpolated Allows one to use variables inside config files
|
|
|
|
=head1 LICENSE AND COPYRIGHT
|
|
|
|
Copyright (c) 2000-2022 Thomas Linden
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the same terms of the Artistic License 2.0.
|
|
|
|
=head1 BUGS AND LIMITATIONS
|
|
|
|
See rt.cpan.org for current bugs, if any.
|
|
|
|
=head1 INCOMPATIBILITIES
|
|
|
|
None known.
|
|
|
|
=head1 DIAGNOSTICS
|
|
|
|
To debug Config::General use the Perl debugger, see L<perldebug>.
|
|
|
|
=head1 DEPENDENCIES
|
|
|
|
Config::General depends on the modules L<FileHandle>,
|
|
L<File::Spec::Functions>, L<File::Glob>, which all are
|
|
shipped with Perl.
|
|
|
|
=head1 AUTHOR
|
|
|
|
Thomas Linden <tlinden |AT| cpan.org>
|
|
|
|
=head1 VERSION
|
|
|
|
2.65
|
|
|
|
=cut
|
|
|