[PATCH] Add git-local-pull.

diff --git a/sha1_file.c b/sha1_file.c
index 29f48d56b18fae6e323d37eebbd440574aed2cfa..ced079184702fad6f1e79a3b90aa4fc317aa0b88 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -45,6 +45,48 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
        return 0;
 }
 
+int get_sha1_file(const char *path, unsigned char *result)
+{
+       char buffer[60];
+       int fd = open(path, O_RDONLY);
+       int len;
+
+       if (fd < 0)
+               return -1;
+       len = read(fd, buffer, sizeof(buffer));
+       close(fd);
+       if (len < 40)
+               return -1;
+       return get_sha1_hex(buffer, result);
+}
+
+int get_sha1(const char *str, unsigned char *sha1)
+{
+       static char pathname[PATH_MAX];
+       static const char *prefix[] = {
+               "",
+               "refs",
+               "refs/tags",
+               "refs/heads",
+               "refs/snap",
+               NULL
+       };
+       const char *gitdir;
+       const char **p;
+
+       if (!get_sha1_hex(str, sha1))
+               return 0;
+
+       gitdir = ".git";
+       for (p = prefix; *p; p++) {
+               snprintf(pathname, sizeof(pathname), "%s/%s/%s", gitdir, *p, str);
+               if (!get_sha1_file(pathname, sha1))
+                       return 0;
+       }
+
+       return -1;
+}
+
 char * sha1_to_hex(const unsigned char *sha1)
 {
        static char buffer[50];