Using a relative_path as git_dir first appears in v1.5.6-1-g044bbbc.
It will make git_dir shorter only if git_dir is inside work_tree,
and this will increase performance. But my last refactor effort on
relative_path function (commit v1.8.3-rc2-12-ge02ca72) changed that.
Always use relative_path as git_dir may bring troubles like
$gmane/234434.
Because new relative_path is a combination of original relative_path
from path.c and original path_relative from quote.c, so in order to
restore the origin implementation, save the original relative_path
as remove_leading_path, and call it in setup.c.
Suggested-by: Karsten Blees <karsten.bl...@gmail.com>
Signed-off-by: Jiang Xin <worldhello....@gmail.com>
---
cache.h | 1 +
path.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
setup.c | 5 +----
3 files changed, 47 insertions(+), 4 deletions(-)
diff --git a/cache.h b/cache.h
index 8e42256..94475bd 100644
--- a/cache.h
+++ b/cache.h
@@ -737,6 +737,7 @@ int is_directory(const char *);
const char *real_path(const char *path);
const char *real_path_if_valid(const char *path);
const char *absolute_path(const char *path);
+const char *remove_leading_path(const char *in, const char *prefix);
const char *relative_path(const char *in, const char *prefix, struct strbuf
*sb);
int normalize_path_copy(char *dst, const char *src);
int longest_ancestor_length(const char *path, struct string_list *prefixes);
diff --git a/path.c b/path.c
index 0c16dc5..fa62da5 100644
--- a/path.c
+++ b/path.c
@@ -558,6 +558,51 @@ const char *relative_path(const char *in, const char
*prefix,
}
/*
+ * A simpler implementation of relative_path
+ *
+ * Get relative path by removing "prefix" from "in". This function
+ * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
+ * to increase performance when traversing the path to work_tree.
+ */
+const char *remove_leading_path(const char *in, const char *prefix)
+{
+ static char buf[PATH_MAX + 1];
+ int i = 0, j = 0;
+
+ if (!prefix || !prefix[0])
+ return in;
+ while (prefix[i]) {
+ if (is_dir_sep(prefix[i])) {
+ if (!is_dir_sep(in[j]))
+ return in;
+ while (is_dir_sep(prefix[i]))
+ i++;
+ while (is_dir_sep(in[j]))
+ j++;
+ continue;
+ } else if (in[j] != prefix[i]) {
+ return in;
+ }
+ i++;
+ j++;
+ }
+ if (
+ /* "/foo" is a prefix of "/foo" */
+ in[j] &&
+ /* "/foo" is not a prefix of "/foobar" */
+ !is_dir_sep(prefix[i-1]) && !is_dir_sep(in[j])
+ )
+ return in;
+ while (is_dir_sep(in[j]))
+ j++;
+ if (!in[j])
+ strcpy(buf, ".");
+ else
+ strcpy(buf, in + j);
+ return buf;
+}
+
+/*
* It is okay if dst == src, but they should not overlap otherwise.
*
* Performs the following normalizations on src, storing the result in dst:
diff --git a/setup.c b/setup.c
index 0d9ea62..dad39c1 100644
--- a/setup.c
+++ b/setup.c
@@ -360,7 +360,6 @@ int is_inside_work_tree(void)
void setup_work_tree(void)
{
- struct strbuf sb = STRBUF_INIT;
const char *work_tree, *git_dir;
static int initialized = 0;
@@ -380,10 +379,8 @@ void setup_work_tree(void)
if (getenv(GIT_WORK_TREE_ENVIRONMENT))
setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
- set_git_dir(relative_path(git_dir, work_tree, &sb));
+ set_git_dir(remove_leading_path(git_dir, work_tree));
initialized = 1;
-
- strbuf_release(&sb);
}
static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
--
1.8.4.460.gbed9cb4
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
