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![Johannes Sixt](/assets/img/avatar_default.png)
Make a few more spots more readable by using the recently introduced, Windows-specific helper. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
181 lines
4.4 KiB
C
181 lines
4.4 KiB
C
#include "cache.h"
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/*
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* Do not use this for inspecting *tracked* content. When path is a
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* symlink to a directory, we do not want to say it is a directory when
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* dealing with tracked content in the working tree.
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*/
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int is_directory(const char *path)
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{
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struct stat st;
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return (!stat(path, &st) && S_ISDIR(st.st_mode));
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}
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/* We allow "recursive" symbolic links. Only within reason, though. */
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#define MAXDEPTH 5
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/*
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* Return the real path (i.e., absolute path, with symlinks resolved
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* and extra slashes removed) equivalent to the specified path. (If
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* you want an absolute path but don't mind links, use
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* absolute_path().) The return value is a pointer to a static
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* buffer.
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*
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* The input and all intermediate paths must be shorter than MAX_PATH.
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* The directory part of path (i.e., everything up to the last
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* dir_sep) must denote a valid, existing directory, but the last
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* component need not exist. If die_on_error is set, then die with an
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* informative error message if there is a problem. Otherwise, return
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* NULL on errors (without generating any output).
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*
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* If path is our buffer, then return path, as it's already what the
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* user wants.
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*/
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static const char *real_path_internal(const char *path, int die_on_error)
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{
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static struct strbuf sb = STRBUF_INIT;
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char *retval = NULL;
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/*
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* If we have to temporarily chdir(), store the original CWD
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* here so that we can chdir() back to it at the end of the
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* function:
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*/
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struct strbuf cwd = STRBUF_INIT;
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int depth = MAXDEPTH;
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char *last_elem = NULL;
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struct stat st;
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/* We've already done it */
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if (path == sb.buf)
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return path;
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if (!*path) {
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if (die_on_error)
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die("The empty string is not a valid path");
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else
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goto error_out;
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}
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strbuf_reset(&sb);
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strbuf_addstr(&sb, path);
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while (depth--) {
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if (!is_directory(sb.buf)) {
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char *last_slash = find_last_dir_sep(sb.buf);
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if (last_slash) {
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last_elem = xstrdup(last_slash + 1);
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strbuf_setlen(&sb, last_slash - sb.buf + 1);
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} else {
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last_elem = xmemdupz(sb.buf, sb.len);
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strbuf_reset(&sb);
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}
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}
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if (sb.len) {
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if (!cwd.len && strbuf_getcwd(&cwd)) {
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if (die_on_error)
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die_errno("Could not get current working directory");
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else
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goto error_out;
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}
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if (chdir(sb.buf)) {
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if (die_on_error)
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die_errno("Could not switch to '%s'",
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sb.buf);
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else
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goto error_out;
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}
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}
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if (strbuf_getcwd(&sb)) {
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if (die_on_error)
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die_errno("Could not get current working directory");
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else
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goto error_out;
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}
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if (last_elem) {
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if (sb.len && !is_dir_sep(sb.buf[sb.len - 1]))
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strbuf_addch(&sb, '/');
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strbuf_addstr(&sb, last_elem);
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free(last_elem);
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last_elem = NULL;
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}
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if (!lstat(sb.buf, &st) && S_ISLNK(st.st_mode)) {
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struct strbuf next_sb = STRBUF_INIT;
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ssize_t len = strbuf_readlink(&next_sb, sb.buf, 0);
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if (len < 0) {
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if (die_on_error)
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die_errno("Invalid symlink '%s'",
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sb.buf);
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else
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goto error_out;
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}
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strbuf_swap(&sb, &next_sb);
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strbuf_release(&next_sb);
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} else
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break;
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}
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retval = sb.buf;
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error_out:
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free(last_elem);
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if (cwd.len && chdir(cwd.buf))
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die_errno("Could not change back to '%s'", cwd.buf);
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strbuf_release(&cwd);
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return retval;
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}
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const char *real_path(const char *path)
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{
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return real_path_internal(path, 1);
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}
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const char *real_path_if_valid(const char *path)
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{
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return real_path_internal(path, 0);
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}
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/*
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* Use this to get an absolute path from a relative one. If you want
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* to resolve links, you should use real_path.
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*/
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const char *absolute_path(const char *path)
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{
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static struct strbuf sb = STRBUF_INIT;
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strbuf_reset(&sb);
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strbuf_add_absolute_path(&sb, path);
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return sb.buf;
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}
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/*
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* Unlike prefix_path, this should be used if the named file does
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* not have to interact with index entry; i.e. name of a random file
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* on the filesystem.
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*/
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const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
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{
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static struct strbuf path = STRBUF_INIT;
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#ifndef GIT_WINDOWS_NATIVE
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if (!pfx_len || is_absolute_path(arg))
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return arg;
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strbuf_reset(&path);
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strbuf_add(&path, pfx, pfx_len);
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strbuf_addstr(&path, arg);
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#else
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/* don't add prefix to absolute paths, but still replace '\' by '/' */
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strbuf_reset(&path);
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if (is_absolute_path(arg))
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pfx_len = 0;
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else if (pfx_len)
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strbuf_add(&path, pfx, pfx_len);
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strbuf_addstr(&path, arg);
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convert_slashes(path.buf + pfx_len);
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#endif
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return path.buf;
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}
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