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authorJulius Plenz <plenz@cis.fu-berlin.de>2011-04-07 12:59:24 +0200
committerLars Hjemli <hjemli@gmail.com>2011-06-20 20:42:19 +0200
commitd711de55280c3c9c10cfda4e24c8f3b3015217b2 (patch)
tree2e4a7d8dcaeefb4259756a16be04c40dee7ed49c /scan-tree.c
parentb0d72da02850abaf4be65ff220774a457c214651 (diff)
guess default branch from HEAD
This is a saner alternative than hardcoding the default branch to be "master". The add_repo() function will now check for a symbolic ref in repo_path/HEAD. If there is a suitable one, overwrite repo->defbranch with it. Note that you'll need to strip the newline from the file (-> len-17). If HEAD is a symbolic link pointing directly to a branch below refs/heads/, do a readlink() instead to find the ref name. Signed-off-by: Julius Plenz <plenz@cis.fu-berlin.de> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to 'scan-tree.c')
-rw-r--r--scan-tree.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/scan-tree.c b/scan-tree.c
index 378d795..a429a9f 100644
--- a/scan-tree.c
+++ b/scan-tree.c
@@ -68,6 +68,39 @@ static char *xstrrchr(char *s, char *from, int c)
return from < s ? NULL : from;
}
+static char *guess_defbranch(const char *repo_path)
+{
+ int fd, len;
+ char buffer[256];
+ char *ref_start;
+ char *head;
+
+ head = fmt("%s/HEAD", repo_path);
+ fd = open(head, O_RDONLY);
+ if (fd == -1)
+ return xstrdup("master");
+
+ memset(buffer, 0, sizeof(buffer));
+ len = read_in_full(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+
+ if(!memcmp(buffer, "ref: refs/heads/", 16))
+ return xstrndup(buffer+16, len-17);
+
+ if(strlen(buffer) == 41) {
+ /* probably contains a SHA1 sum */
+ memset(buffer, 0, sizeof(buffer));
+ if(readlink(head, buffer, sizeof(buffer)-1)) {
+ ref_start = memmem(buffer, sizeof(buffer)-1, "refs/heads/", 11);
+ if(ref_start)
+ return xstrdup(ref_start+11);
+ }
+ }
+
+ return xstrdup("master");
+}
+
+
static void add_repo(const char *base, const char *path, repo_config_fn fn)
{
struct stat st;
@@ -105,6 +138,9 @@ static void add_repo(const char *base, const char *path, repo_config_fn fn)
*p = '\0';
repo->name = repo->url;
repo->path = xstrdup(path);
+
+ repo->defbranch = guess_defbranch(repo->path);
+
while (!owner) {
if ((pwd = getpwuid(st.st_uid)) == NULL) {
fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",