1 files changed, 0 insertions, 323 deletions
diff --git a/third_party/git/symlinks.c b/third_party/git/symlinks.c
deleted file mode 100644
index 69d458a24d53..000000000000
--- a/third_party/git/symlinks.c
+++ /dev/null
@@ -1,323 +0,0 @@
-#include "cache.h"
-
-static int threaded_check_leading_path(struct cache_def *cache, const char *name, int len);
-static int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len);
-
-/*
- * Returns the length (on a path component basis) of the longest
- * common prefix match of 'name_a' and 'name_b'.
- */
-static int longest_path_match(const char *name_a, int len_a,
-			      const char *name_b, int len_b,
-			      int *previous_slash)
-{
-	int max_len, match_len = 0, match_len_prev = 0, i = 0;
-
-	max_len = len_a < len_b ? len_a : len_b;
-	while (i < max_len && name_a[i] == name_b[i]) {
-		if (name_a[i] == '/') {
-			match_len_prev = match_len;
-			match_len = i;
-		}
-		i++;
-	}
-	/*
-	 * Is 'name_b' a substring of 'name_a', the other way around,
-	 * or is 'name_a' and 'name_b' the exact same string?
-	 */
-	if (i >= max_len && ((len_a > len_b && name_a[len_b] == '/') ||
-			     (len_a < len_b && name_b[len_a] == '/') ||
-			     (len_a == len_b))) {
-		match_len_prev = match_len;
-		match_len = i;
-	}
-	*previous_slash = match_len_prev;
-	return match_len;
-}
-
-static struct cache_def default_cache = CACHE_DEF_INIT;
-
-static inline void reset_lstat_cache(struct cache_def *cache)
-{
-	strbuf_reset(&cache->path);
-	cache->flags = 0;
-	/*
-	 * The track_flags and prefix_len_stat_func members is only
-	 * set by the safeguard rule inside lstat_cache()
-	 */
-}
-
-#define FL_DIR      (1 << 0)
-#define FL_NOENT    (1 << 1)
-#define FL_SYMLINK  (1 << 2)
-#define FL_LSTATERR (1 << 3)
-#define FL_ERR      (1 << 4)
-#define FL_FULLPATH (1 << 5)
-
-/*
- * Check if name 'name' of length 'len' has a symlink leading
- * component, or if the directory exists and is real, or not.
- *
- * To speed up the check, some information is allowed to be cached.
- * This can be indicated by the 'track_flags' argument, which also can
- * be used to indicate that we should check the full path.
- *
- * The 'prefix_len_stat_func' parameter can be used to set the length
- * of the prefix, where the cache should use the stat() function
- * instead of the lstat() function to test each path component.
- */
-static int lstat_cache_matchlen(struct cache_def *cache,
-				const char *name, int len,
-				int *ret_flags, int track_flags,
-				int prefix_len_stat_func)
-{
-	int match_len, last_slash, last_slash_dir, previous_slash;
-	int save_flags, ret;
-	struct stat st;
-
-	if (cache->track_flags != track_flags ||
-	    cache->prefix_len_stat_func != prefix_len_stat_func) {
-		/*
-		 * As a safeguard rule we clear the cache if the
-		 * values of track_flags and/or prefix_len_stat_func
-		 * does not match with the last supplied values.
-		 */
-		reset_lstat_cache(cache);
-		cache->track_flags = track_flags;
-		cache->prefix_len_stat_func = prefix_len_stat_func;
-		match_len = last_slash = 0;
-	} else {
-		/*
-		 * Check to see if we have a match from the cache for
-		 * the 2 "excluding" path types.
-		 */
-		match_len = last_slash =
-			longest_path_match(name, len, cache->path.buf,
-					   cache->path.len, &previous_slash);
-		*ret_flags = cache->flags & track_flags & (FL_NOENT|FL_SYMLINK);
-
-		if (!(track_flags & FL_FULLPATH) && match_len == len)
-			match_len = last_slash = previous_slash;
-
-		if (*ret_flags && match_len == cache->path.len)
-			return match_len;
-		/*
-		 * If we now have match_len > 0, we would know that
-		 * the matched part will always be a directory.
-		 *
-		 * Also, if we are tracking directories and 'name' is
-		 * a substring of the cache on a path component basis,
-		 * we can return immediately.
-		 */
-		*ret_flags = track_flags & FL_DIR;
-		if (*ret_flags && len == match_len)
-			return match_len;
-	}
-
-	/*
-	 * Okay, no match from the cache so far, so now we have to
-	 * check the rest of the path components.
-	 */
-	*ret_flags = FL_DIR;
-	last_slash_dir = last_slash;
-	if (len > cache->path.len)
-		strbuf_grow(&cache->path, len - cache->path.len);
-	while (match_len < len) {
-		do {
-			cache->path.buf[match_len] = name[match_len];
-			match_len++;
-		} while (match_len < len && name[match_len] != '/');
-		if (match_len >= len && !(track_flags & FL_FULLPATH))
-			break;
-		last_slash = match_len;
-		cache->path.buf[last_slash] = '\0';
-
-		if (last_slash <= prefix_len_stat_func)
-			ret = stat(cache->path.buf, &st);
-		else
-			ret = lstat(cache->path.buf, &st);
-
-		if (ret) {
-			*ret_flags = FL_LSTATERR;
-			if (errno == ENOENT)
-				*ret_flags |= FL_NOENT;
-		} else if (S_ISDIR(st.st_mode)) {
-			last_slash_dir = last_slash;
-			continue;
-		} else if (S_ISLNK(st.st_mode)) {
-			*ret_flags = FL_SYMLINK;
-		} else {
-			*ret_flags = FL_ERR;
-		}
-		break;
-	}
-
-	/*
-	 * At the end update the cache.  Note that max 3 different
-	 * path types, FL_NOENT, FL_SYMLINK and FL_DIR, can be cached
-	 * for the moment!
-	 */
-	save_flags = *ret_flags & track_flags & (FL_NOENT|FL_SYMLINK);
-	if (save_flags && last_slash > 0) {
-		cache->path.buf[last_slash] = '\0';
-		cache->path.len = last_slash;
-		cache->flags = save_flags;
-	} else if ((track_flags & FL_DIR) && last_slash_dir > 0) {
-		/*
-		 * We have a separate test for the directory case,
-		 * since it could be that we have found a symlink or a
-		 * non-existing directory and the track_flags says
-		 * that we cannot cache this fact, so the cache would
-		 * then have been left empty in this case.
-		 *
-		 * But if we are allowed to track real directories, we
-		 * can still cache the path components before the last
-		 * one (the found symlink or non-existing component).
-		 */
-		cache->path.buf[last_slash_dir] = '\0';
-		cache->path.len = last_slash_dir;
-		cache->flags = FL_DIR;
-	} else {
-		reset_lstat_cache(cache);
-	}
-	return match_len;
-}
-
-static int lstat_cache(struct cache_def *cache, const char *name, int len,
-		       int track_flags, int prefix_len_stat_func)
-{
-	int flags;
-	(void)lstat_cache_matchlen(cache, name, len, &flags, track_flags,
-			prefix_len_stat_func);
-	return flags;
-}
-
-#define USE_ONLY_LSTAT  0
-
-/*
- * Return non-zero if path 'name' has a leading symlink component
- */
-int threaded_has_symlink_leading_path(struct cache_def *cache, const char *name, int len)
-{
-	return lstat_cache(cache, name, len, FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) & FL_SYMLINK;
-}
-
-/*
- * Return non-zero if path 'name' has a leading symlink component
- */
-int has_symlink_leading_path(const char *name, int len)
-{
-	return threaded_has_symlink_leading_path(&default_cache, name, len);
-}
-
-/*
- * Return zero if path 'name' has a leading symlink component or
- * if some leading path component does not exists.
- *
- * Return -1 if leading path exists and is a directory.
- *
- * Return path length if leading path exists and is neither a
- * directory nor a symlink.
- */
-int check_leading_path(const char *name, int len)
-{
-	return threaded_check_leading_path(&default_cache, name, len);
-}
-
-/*
- * Return zero if path 'name' has a leading symlink component or
- * if some leading path component does not exists.
- *
- * Return -1 if leading path exists and is a directory.
- *
- * Return path length if leading path exists and is neither a
- * directory nor a symlink.
- */
-static int threaded_check_leading_path(struct cache_def *cache, const char *name, int len)
-{
-	int flags;
-	int match_len = lstat_cache_matchlen(cache, name, len, &flags,
-			   FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT);
-	if (flags & FL_NOENT)
-		return 0;
-	else if (flags & FL_DIR)
-		return -1;
-	else
-		return match_len;
-}
-
-/*
- * Return non-zero if all path components of 'name' exists as a
- * directory.  If prefix_len > 0, we will test with the stat()
- * function instead of the lstat() function for a prefix length of
- * 'prefix_len', thus we then allow for symlinks in the prefix part as
- * long as those points to real existing directories.
- */
-int has_dirs_only_path(const char *name, int len, int prefix_len)
-{
-	return threaded_has_dirs_only_path(&default_cache, name, len, prefix_len);
-}
-
-/*
- * Return non-zero if all path components of 'name' exists as a
- * directory.  If prefix_len > 0, we will test with the stat()
- * function instead of the lstat() function for a prefix length of
- * 'prefix_len', thus we then allow for symlinks in the prefix part as
- * long as those points to real existing directories.
- */
-static int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len)
-{
-	return lstat_cache(cache, name, len,
-			   FL_DIR|FL_FULLPATH, prefix_len) &
-		FL_DIR;
-}
-
-static struct strbuf removal = STRBUF_INIT;
-
-static void do_remove_scheduled_dirs(int new_len)
-{
-	while (removal.len > new_len) {
-		removal.buf[removal.len] = '\0';
-		if (rmdir(removal.buf))
-			break;
-		do {
-			removal.len--;
-		} while (removal.len > new_len &&
-			 removal.buf[removal.len] != '/');
-	}
-	removal.len = new_len;
-}
-
-void schedule_dir_for_removal(const char *name, int len)
-{
-	int match_len, last_slash, i, previous_slash;
-
-	match_len = last_slash = i =
-		longest_path_match(name, len, removal.buf, removal.len,
-				   &previous_slash);
-	/* Find last slash inside 'name' */
-	while (i < len) {
-		if (name[i] == '/')
-			last_slash = i;
-		i++;
-	}
-
-	/*
-	 * If we are about to go down the directory tree, we check if
-	 * we must first go upwards the tree, such that we then can
-	 * remove possible empty directories as we go upwards.
-	 */
-	if (match_len < last_slash && match_len < removal.len)
-		do_remove_scheduled_dirs(match_len);
-	/*
-	 * If we go deeper down the directory tree, we only need to
-	 * save the new path components as we go down.
-	 */
-	if (match_len < last_slash)
-		strbuf_add(&removal, &name[match_len], last_slash - match_len);
-}
-
-void remove_scheduled_dirs(void)
-{
-	do_remove_scheduled_dirs(0);
-}