130 lines
3.6 KiB
Python
Executable File
130 lines
3.6 KiB
Python
Executable File
#!/usr/bin/python
|
|
#
|
|
# diffconfig - a tool to compare .config files.
|
|
#
|
|
# originally written in 2006 by Matt Mackall
|
|
# (at least, this was in his bloatwatch source code)
|
|
# last worked on 2008 by Tim Bird
|
|
#
|
|
|
|
import sys, os
|
|
|
|
def usage():
|
|
print """Usage: diffconfig [-h] [-m] [<config1> <config2>]
|
|
|
|
Diffconfig is a simple utility for comparing two .config files.
|
|
Using standard diff to compare .config files often includes extraneous and
|
|
distracting information. This utility produces sorted output with only the
|
|
changes in configuration values between the two files.
|
|
|
|
Added and removed items are shown with a leading plus or minus, respectively.
|
|
Changed items show the old and new values on a single line.
|
|
|
|
If -m is specified, then output will be in "merge" style, which has the
|
|
changed and new values in kernel config option format.
|
|
|
|
If no config files are specified, .config and .config.old are used.
|
|
|
|
Example usage:
|
|
$ diffconfig .config config-with-some-changes
|
|
-EXT2_FS_XATTR n
|
|
-EXT2_FS_XIP n
|
|
CRAMFS n -> y
|
|
EXT2_FS y -> n
|
|
LOG_BUF_SHIFT 14 -> 16
|
|
PRINTK_TIME n -> y
|
|
"""
|
|
sys.exit(0)
|
|
|
|
# returns a dictionary of name/value pairs for config items in the file
|
|
def readconfig(config_file):
|
|
d = {}
|
|
for line in config_file:
|
|
line = line[:-1]
|
|
if line[:7] == "CONFIG_":
|
|
name, val = line[7:].split("=", 1)
|
|
d[name] = val
|
|
if line[-11:] == " is not set":
|
|
d[line[9:-11]] = "n"
|
|
return d
|
|
|
|
def print_config(op, config, value, new_value):
|
|
global merge_style
|
|
|
|
if merge_style:
|
|
if new_value:
|
|
if new_value=="n":
|
|
print "# CONFIG_%s is not set" % config
|
|
else:
|
|
print "CONFIG_%s=%s" % (config, new_value)
|
|
else:
|
|
if op=="-":
|
|
print "-%s %s" % (config, value)
|
|
elif op=="+":
|
|
print "+%s %s" % (config, new_value)
|
|
else:
|
|
print " %s %s -> %s" % (config, value, new_value)
|
|
|
|
def main():
|
|
global merge_style
|
|
|
|
# parse command line args
|
|
if ("-h" in sys.argv or "--help" in sys.argv):
|
|
usage()
|
|
|
|
merge_style = 0
|
|
if "-m" in sys.argv:
|
|
merge_style = 1
|
|
sys.argv.remove("-m")
|
|
|
|
argc = len(sys.argv)
|
|
if not (argc==1 or argc == 3):
|
|
print "Error: incorrect number of arguments or unrecognized option"
|
|
usage()
|
|
|
|
if argc == 1:
|
|
# if no filenames given, assume .config and .config.old
|
|
build_dir=""
|
|
if os.environ.has_key("KBUILD_OUTPUT"):
|
|
build_dir = os.environ["KBUILD_OUTPUT"]+"/"
|
|
|
|
configa_filename = build_dir + ".config.old"
|
|
configb_filename = build_dir + ".config"
|
|
else:
|
|
configa_filename = sys.argv[1]
|
|
configb_filename = sys.argv[2]
|
|
|
|
a = readconfig(file(configa_filename))
|
|
b = readconfig(file(configb_filename))
|
|
|
|
# print items in a but not b (accumulate, sort and print)
|
|
old = []
|
|
for config in a:
|
|
if config not in b:
|
|
old.append(config)
|
|
old.sort()
|
|
for config in old:
|
|
print_config("-", config, a[config], None)
|
|
del a[config]
|
|
|
|
# print items that changed (accumulate, sort, and print)
|
|
changed = []
|
|
for config in a:
|
|
if a[config] != b[config]:
|
|
changed.append(config)
|
|
else:
|
|
del b[config]
|
|
changed.sort()
|
|
for config in changed:
|
|
print_config("->", config, a[config], b[config])
|
|
del b[config]
|
|
|
|
# now print items in b but not in a
|
|
# (items from b that were in a were removed above)
|
|
new = b.keys()
|
|
new.sort()
|
|
for config in new:
|
|
print_config("+", config, None, b[config])
|
|
|
|
main()
|