From: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
resolve_gitlink_ref_recursive() did about the same thing as
parse_ref(), but didn't know as many tricks. It also had another
random limit of 128 bytes for symrefs. So base resolve_gitlink_ref()
on parse_ref() instead.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
refs.c | 69 ++++++++++++++++++++++++++----------------------------------------
1 file changed, 27 insertions(+), 42 deletions(-)
diff --git a/refs.c b/refs.c
index e1aa6a4..a7c8abd 100644
--- a/refs.c
+++ b/refs.c
@@ -1299,48 +1299,11 @@ static int resolve_gitlink_packed_ref(struct ref_cache *refs,
return 0;
}
-static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
- const char *refname, unsigned char *sha1,
- int recursion)
-{
- int fd, len;
- char buffer[128], *p;
- char *path;
-
- if (recursion > MAXDEPTH)
- return -1;
- path = *refs->name
- ? git_path_submodule(refs->name, "%s", refname)
- : git_path("%s", refname);
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return resolve_gitlink_packed_ref(refs, refname, sha1);
-
- len = read(fd, buffer, sizeof(buffer)-1);
- close(fd);
- if (len < 0)
- return -1;
- while (len && isspace(buffer[len-1]))
- len--;
- buffer[len] = 0;
-
- /* Was it a detached head or an old-fashioned symlink? */
- if (!get_sha1_hex(buffer, sha1))
- return 0;
-
- /* Symref? */
- if (strncmp(buffer, "ref:", 4))
- return -1;
- p = buffer + 4;
- while (isspace(*p))
- p++;
-
- return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1);
-}
-
int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1)
{
- int len = strlen(path), retval;
+ struct strbuf result = STRBUF_INIT;
+ int len = strlen(path), parseval, ret;
+ int depth = MAXDEPTH;
char *submodule;
struct ref_cache *refs;
@@ -1352,8 +1315,30 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sh
refs = get_ref_cache(submodule);
free(submodule);
- retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0);
- return retval;
+ strbuf_addstr(&result, refname);
+ do {
+ if (--depth < 0) {
+ errno = ELOOP;
+ ret = -1;
+ goto out;
+ }
+ path = *refs->name
+ ? git_path_submodule(refs->name, "%s", result.buf)
+ : git_path("%s", result.buf);
+ parseval = parse_ref(path, &result, sha1, NULL);
+ } while (!parseval);
+
+ if (parseval == 1) {
+ ret = 0;
+ } else if (parseval == -2) {
+ ret = resolve_gitlink_packed_ref(refs, result.buf, sha1) ? -1 : 0;
+ } else {
+ ret = -1;
+ }
+
+out:
+ strbuf_release(&result);
+ return ret;
}
/*
--
2.1.1
--
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