mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Dmitry Ivankov](/assets/img/avatar_default.png)
Currently parse-options.o pulls quite a big bunch of dependencies. his complicates it's usage in contrib/ because it pulls external dependencies and it also increases executables size. Split off less generic and more internal to git part of parse-options.c to parse-options-cb.c. Move prefix_filename function from setup.c to abspath.c. abspath.o and wrapper.o pull each other, so it's unlikely to increase the dependencies. It was a dependency of parse-options.o that pulled many others. Now parse-options.o pulls just abspath.o, ctype.o, strbuf.o, usage.o, wrapper.o, libc directly and strlcpy.o indirectly. Signed-off-by: Dmitry Ivankov <divanorama@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
170 lines
4.2 KiB
C
170 lines
4.2 KiB
C
#include "cache.h"
|
|
|
|
/*
|
|
* Do not use this for inspecting *tracked* content. When path is a
|
|
* symlink to a directory, we do not want to say it is a directory when
|
|
* dealing with tracked content in the working tree.
|
|
*/
|
|
int is_directory(const char *path)
|
|
{
|
|
struct stat st;
|
|
return (!stat(path, &st) && S_ISDIR(st.st_mode));
|
|
}
|
|
|
|
/* We allow "recursive" symbolic links. Only within reason, though. */
|
|
#define MAXDEPTH 5
|
|
|
|
/*
|
|
* Use this to get the real path, i.e. resolve links. If you want an
|
|
* absolute path but don't mind links, use absolute_path.
|
|
*
|
|
* If path is our buffer, then return path, as it's already what the
|
|
* user wants.
|
|
*/
|
|
const char *real_path(const char *path)
|
|
{
|
|
static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
|
|
char cwd[1024] = "";
|
|
int buf_index = 1;
|
|
|
|
int depth = MAXDEPTH;
|
|
char *last_elem = NULL;
|
|
struct stat st;
|
|
|
|
/* We've already done it */
|
|
if (path == buf || path == next_buf)
|
|
return path;
|
|
|
|
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
|
|
die ("Too long path: %.*s", 60, path);
|
|
|
|
while (depth--) {
|
|
if (!is_directory(buf)) {
|
|
char *last_slash = find_last_dir_sep(buf);
|
|
if (last_slash) {
|
|
*last_slash = '\0';
|
|
last_elem = xstrdup(last_slash + 1);
|
|
} else {
|
|
last_elem = xstrdup(buf);
|
|
*buf = '\0';
|
|
}
|
|
}
|
|
|
|
if (*buf) {
|
|
if (!*cwd && !getcwd(cwd, sizeof(cwd)))
|
|
die_errno ("Could not get current working directory");
|
|
|
|
if (chdir(buf))
|
|
die_errno ("Could not switch to '%s'", buf);
|
|
}
|
|
if (!getcwd(buf, PATH_MAX))
|
|
die_errno ("Could not get current working directory");
|
|
|
|
if (last_elem) {
|
|
size_t len = strlen(buf);
|
|
if (len + strlen(last_elem) + 2 > PATH_MAX)
|
|
die ("Too long path name: '%s/%s'",
|
|
buf, last_elem);
|
|
if (len && !is_dir_sep(buf[len-1]))
|
|
buf[len++] = '/';
|
|
strcpy(buf + len, last_elem);
|
|
free(last_elem);
|
|
last_elem = NULL;
|
|
}
|
|
|
|
if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
|
|
ssize_t len = readlink(buf, next_buf, PATH_MAX);
|
|
if (len < 0)
|
|
die_errno ("Invalid symlink '%s'", buf);
|
|
if (PATH_MAX <= len)
|
|
die("symbolic link too long: %s", buf);
|
|
next_buf[len] = '\0';
|
|
buf = next_buf;
|
|
buf_index = 1 - buf_index;
|
|
next_buf = bufs[buf_index];
|
|
} else
|
|
break;
|
|
}
|
|
|
|
if (*cwd && chdir(cwd))
|
|
die_errno ("Could not change back to '%s'", cwd);
|
|
|
|
return buf;
|
|
}
|
|
|
|
static const char *get_pwd_cwd(void)
|
|
{
|
|
static char cwd[PATH_MAX + 1];
|
|
char *pwd;
|
|
struct stat cwd_stat, pwd_stat;
|
|
if (getcwd(cwd, PATH_MAX) == NULL)
|
|
return NULL;
|
|
pwd = getenv("PWD");
|
|
if (pwd && strcmp(pwd, cwd)) {
|
|
stat(cwd, &cwd_stat);
|
|
if ((cwd_stat.st_dev || cwd_stat.st_ino) &&
|
|
!stat(pwd, &pwd_stat) &&
|
|
pwd_stat.st_dev == cwd_stat.st_dev &&
|
|
pwd_stat.st_ino == cwd_stat.st_ino) {
|
|
strlcpy(cwd, pwd, PATH_MAX);
|
|
}
|
|
}
|
|
return cwd;
|
|
}
|
|
|
|
/*
|
|
* Use this to get an absolute path from a relative one. If you want
|
|
* to resolve links, you should use real_path.
|
|
*
|
|
* If the path is already absolute, then return path. As the user is
|
|
* never meant to free the return value, we're safe.
|
|
*/
|
|
const char *absolute_path(const char *path)
|
|
{
|
|
static char buf[PATH_MAX + 1];
|
|
|
|
if (is_absolute_path(path)) {
|
|
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
|
|
die("Too long path: %.*s", 60, path);
|
|
} else {
|
|
size_t len;
|
|
const char *fmt;
|
|
const char *cwd = get_pwd_cwd();
|
|
if (!cwd)
|
|
die_errno("Cannot determine the current working directory");
|
|
len = strlen(cwd);
|
|
fmt = (len > 0 && is_dir_sep(cwd[len-1])) ? "%s%s" : "%s/%s";
|
|
if (snprintf(buf, PATH_MAX, fmt, cwd, path) >= PATH_MAX)
|
|
die("Too long path: %.*s", 60, path);
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* Unlike prefix_path, this should be used if the named file does
|
|
* not have to interact with index entry; i.e. name of a random file
|
|
* on the filesystem.
|
|
*/
|
|
const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
|
|
{
|
|
static char path[PATH_MAX];
|
|
#ifndef WIN32
|
|
if (!pfx_len || is_absolute_path(arg))
|
|
return arg;
|
|
memcpy(path, pfx, pfx_len);
|
|
strcpy(path + pfx_len, arg);
|
|
#else
|
|
char *p;
|
|
/* don't add prefix to absolute paths, but still replace '\' by '/' */
|
|
if (is_absolute_path(arg))
|
|
pfx_len = 0;
|
|
else if (pfx_len)
|
|
memcpy(path, pfx, pfx_len);
|
|
strcpy(path + pfx_len, arg);
|
|
for (p = path + pfx_len; *p; p++)
|
|
if (*p == '\\')
|
|
*p = '/';
|
|
#endif
|
|
return path;
|
|
}
|