platform_build/tools/atree/files.cpp

483 lines
12 KiB
C++

#include "files.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <fnmatch.h>
#include <string.h>
#include <stdlib.h>
static bool
is_comment_line(const char* p)
{
while (*p && isspace(*p)) {
p++;
}
return *p == '#';
}
static string
path_append(const string& base, const string& leaf)
{
string full = base;
if (base.length() > 0 && leaf.length() > 0) {
full += '/';
}
full += leaf;
return full;
}
static bool
is_whitespace_line(const char* p)
{
while (*p) {
if (!isspace(*p)) {
return false;
}
p++;
}
return true;
}
static bool
is_exclude_line(const char* p) {
while (*p) {
if (*p == '-') {
return true;
}
else if (isspace(*p)) {
p++;
}
else {
return false;
}
}
return false;
}
void
split_line(const char* p, vector<string>* out)
{
const char* q = p;
enum { WHITE, TEXT, IN_QUOTE } state = WHITE;
while (*p) {
if (*p == '#') {
break;
}
switch (state)
{
case WHITE:
if (!isspace(*p)) {
q = p;
state = (*p == '"') ? IN_QUOTE : TEXT;
}
break;
case IN_QUOTE:
if (*p == '"') {
state = TEXT;
break;
}
// otherwise fall-through to TEXT case
case TEXT:
if (state != IN_QUOTE && isspace(*p)) {
if (q != p) {
const char* start = q;
size_t len = p-q;
if (len > 2 && *start == '"' && start[len - 1] == '"') {
start++;
len -= 2;
}
out->push_back(string(start, len));
}
state = WHITE;
}
break;
}
p++;
}
if (state == TEXT) {
const char* start = q;
size_t len = p-q;
if (len > 2 && *start == '"' && start[len - 1] == '"') {
start++;
len -= 2;
}
out->push_back(string(start, len));
}
}
static void
add_file(vector<FileRecord>* files, const FileOpType fileOp,
const string& listFile, int listLine,
const string& sourceName, const string& outName)
{
FileRecord rec;
rec.listFile = listFile;
rec.listLine = listLine;
rec.fileOp = fileOp;
rec.sourceName = sourceName;
rec.outName = outName;
files->push_back(rec);
}
static string
replace_variables(const string& input,
const map<string, string>& variables,
bool* error) {
if (variables.empty()) {
return input;
}
// Abort if the variable prefix is not found
if (input.find("${") == string::npos) {
return input;
}
string result = input;
// Note: rather than be fancy to detect recursive replacements,
// we simply iterate till a given threshold is met.
int retries = 1000;
bool did_replace;
do {
did_replace = false;
for (map<string, string>::const_iterator it = variables.begin();
it != variables.end(); ++it) {
string::size_type pos = 0;
while((pos = result.find(it->first, pos)) != string::npos) {
result = result.replace(pos, it->first.length(), it->second);
pos += it->second.length();
did_replace = true;
}
}
if (did_replace && --retries == 0) {
*error = true;
fprintf(stderr, "Recursive replacement detected during variables "
"substitution. Full list of variables is: ");
for (map<string, string>::const_iterator it = variables.begin();
it != variables.end(); ++it) {
fprintf(stderr, " %s=%s\n",
it->first.c_str(), it->second.c_str());
}
return result;
}
} while (did_replace);
return result;
}
int
read_list_file(const string& filename,
const map<string, string>& variables,
vector<FileRecord>* files,
vector<string>* excludes)
{
int err = 0;
FILE* f = NULL;
long size;
char* buf = NULL;
char *p, *q;
int i, lineCount;
f = fopen(filename.c_str(), "r");
if (f == NULL) {
fprintf(stderr, "Could not open list file (%s): %s\n",
filename.c_str(), strerror(errno));
err = errno;
goto cleanup;
}
err = fseek(f, 0, SEEK_END);
if (err != 0) {
fprintf(stderr, "Could not seek to the end of file %s. (%s)\n",
filename.c_str(), strerror(errno));
err = errno;
goto cleanup;
}
size = ftell(f);
err = fseek(f, 0, SEEK_SET);
if (err != 0) {
fprintf(stderr, "Could not seek to the beginning of file %s. (%s)\n",
filename.c_str(), strerror(errno));
err = errno;
goto cleanup;
}
buf = (char*)malloc(size+1);
if (buf == NULL) {
// (potentially large)
fprintf(stderr, "out of memory (%ld)\n", size);
err = ENOMEM;
goto cleanup;
}
if (1 != fread(buf, size, 1, f)) {
fprintf(stderr, "error reading file %s. (%s)\n",
filename.c_str(), strerror(errno));
err = errno;
goto cleanup;
}
// split on lines
p = buf;
q = buf+size;
lineCount = 0;
while (p<q) {
if (*p == '\r' || *p == '\n') {
*p = '\0';
lineCount++;
}
p++;
}
// read lines
p = buf;
for (i=0; i<lineCount; i++) {
int len = strlen(p);
q = p + len + 1;
if (is_whitespace_line(p) || is_comment_line(p)) {
;
}
else if (is_exclude_line(p)) {
while (*p != '-') p++;
p++;
excludes->push_back(string(p));
}
else {
vector<string> words;
split_line(p, &words);
#if 0
printf("[ ");
for (size_t k=0; k<words.size(); k++) {
printf("'%s' ", words[k].c_str());
}
printf("]\n");
#endif
FileOpType op = FILE_OP_COPY;
string paths[2];
int pcount = 0;
string errstr;
for (vector<string>::iterator it = words.begin(); it != words.end(); ++it) {
const string& word = *it;
if (word == "rm") {
if (op != FILE_OP_COPY) {
errstr = "Error: you can only specifiy 'rm' or 'strip' once per line.";
break;
}
op = FILE_OP_REMOVE;
} else if (word == "strip") {
if (op != FILE_OP_COPY) {
errstr = "Error: you can only specifiy 'rm' or 'strip' once per line.";
break;
}
op = FILE_OP_STRIP;
} else if (pcount < 2) {
bool error = false;
paths[pcount++] = replace_variables(word, variables, &error);
if (error) {
err = 1;
goto cleanup;
}
} else {
errstr = "Error: More than 2 paths per line.";
break;
}
}
if (pcount == 0 && !errstr.empty()) {
errstr = "Error: No path found on line.";
}
if (!errstr.empty()) {
fprintf(stderr, "%s:%d: bad format: %s\n%s\nExpected: [SRC] [rm|strip] DEST\n",
filename.c_str(), i+1, p, errstr.c_str());
err = 1;
} else {
if (pcount == 1) {
// pattern: [rm|strip] DEST
paths[1] = paths[0];
}
add_file(files, op, filename, i+1, paths[0], paths[1]);
}
}
p = q;
}
cleanup:
if (buf != NULL) {
free(buf);
}
if (f != NULL) {
fclose(f);
}
return err;
}
int
locate(FileRecord* rec, const vector<string>& search)
{
if (rec->fileOp == FILE_OP_REMOVE) {
// Don't touch source files when removing a destination.
rec->sourceMod = 0;
rec->sourceSize = 0;
rec->sourceIsDir = false;
return 0;
}
int err;
for (vector<string>::const_iterator it=search.begin();
it!=search.end(); it++) {
string full = path_append(*it, rec->sourceName);
struct stat st;
err = stat(full.c_str(), &st);
if (err == 0) {
rec->sourceBase = *it;
rec->sourcePath = full;
rec->sourceMod = st.st_mtime;
rec->sourceSize = st.st_size;
rec->sourceIsDir = S_ISDIR(st.st_mode);
return 0;
}
}
fprintf(stderr, "%s:%d: couldn't locate source file: %s\n",
rec->listFile.c_str(), rec->listLine, rec->sourceName.c_str());
return 1;
}
void
stat_out(const string& base, FileRecord* rec)
{
rec->outPath = path_append(base, rec->outName);
int err;
struct stat st;
err = stat(rec->outPath.c_str(), &st);
if (err == 0) {
rec->outMod = st.st_mtime;
rec->outSize = st.st_size;
rec->outIsDir = S_ISDIR(st.st_mode);
} else {
rec->outMod = 0;
rec->outSize = 0;
rec->outIsDir = false;
}
}
string
dir_part(const string& filename)
{
int pos = filename.rfind('/');
if (pos <= 0) {
return ".";
}
return filename.substr(0, pos);
}
static void
add_more(const string& entry, bool isDir,
const FileRecord& rec, vector<FileRecord>*more)
{
FileRecord r;
r.listFile = rec.listFile;
r.listLine = rec.listLine;
r.sourceName = path_append(rec.sourceName, entry);
r.sourcePath = path_append(rec.sourceBase, r.sourceName);
struct stat st;
int err = stat(r.sourcePath.c_str(), &st);
if (err == 0) {
r.sourceMod = st.st_mtime;
}
r.sourceIsDir = isDir;
r.outName = path_append(rec.outName, entry);
more->push_back(r);
}
static bool
matches_excludes(const char* file, const vector<string>& excludes)
{
for (vector<string>::const_iterator it=excludes.begin();
it!=excludes.end(); it++) {
if (0 == fnmatch(it->c_str(), file, FNM_PERIOD)) {
return true;
}
}
return false;
}
static int
list_dir(const string& path, const FileRecord& rec,
const vector<string>& excludes,
vector<FileRecord>* more)
{
int err;
string full = path_append(rec.sourceBase, rec.sourceName);
full = path_append(full, path);
DIR *d = opendir(full.c_str());
if (d == NULL) {
return errno;
}
vector<string> dirs;
struct dirent *ent;
while (NULL != (ent = readdir(d))) {
if (0 == strcmp(".", ent->d_name)
|| 0 == strcmp("..", ent->d_name)) {
continue;
}
if (matches_excludes(ent->d_name, excludes)) {
continue;
}
string entry = path_append(path, ent->d_name);
#ifdef HAVE_DIRENT_D_TYPE
bool is_directory = (ent->d_type == DT_DIR);
#else
// If dirent.d_type is missing, then use stat instead
struct stat stat_buf;
stat(entry.c_str(), &stat_buf);
bool is_directory = S_ISDIR(stat_buf.st_mode);
#endif
add_more(entry, is_directory, rec, more);
if (is_directory) {
dirs.push_back(entry);
}
}
closedir(d);
for (vector<string>::iterator it=dirs.begin(); it!=dirs.end(); it++) {
list_dir(*it, rec, excludes, more);
}
return 0;
}
int
list_dir(const FileRecord& rec, const vector<string>& excludes,
vector<FileRecord>* files)
{
return list_dir("", rec, excludes, files);
}
FileRecord::FileRecord() {
fileOp = FILE_OP_COPY;
}