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fsck-cache: walk the 'refs' directory if the user doesn't give any
explicit references for reachability analysis. We already had that as separate logic in git-prune-script, so this is not a new special case - it's an old special case moved into fsck, making normal usage be much simpler.
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commit
1024932f01
83
fsck-cache.c
83
fsck-cache.c
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@ -296,6 +296,70 @@ static int fsck_dir(int i, char *path)
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return 0;
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}
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static void read_sha1_reference(const char *path)
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{
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char hexname[60];
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unsigned char sha1[20];
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int fd = open(path, O_RDONLY), len;
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struct object *obj;
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if (fd < 0)
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return;
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len = read(fd, hexname, sizeof(hexname));
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close(fd);
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if (len < 40)
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return;
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if (get_sha1_hex(hexname, sha1) < 0)
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return;
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obj = lookup_object(sha1);
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obj->used = 1;
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mark_reachable(obj, REACHABLE);
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}
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static void find_file_objects(const char *base, const char *name)
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{
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int baselen = strlen(base);
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int namelen = strlen(name);
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char *path = xmalloc(baselen + namelen + 2);
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struct stat st;
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memcpy(path, base, baselen);
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path[baselen] = '/';
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memcpy(path + baselen + 1, name, namelen+1);
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if (stat(path, &st) < 0)
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return;
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/*
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* Recurse into directories
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*/
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if (S_ISDIR(st.st_mode)) {
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DIR *dir = opendir(path);
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if (dir) {
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struct dirent *de;
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while ((de = readdir(dir)) != NULL) {
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if (de->d_name[0] == '.')
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continue;
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find_file_objects(path, de->d_name);
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}
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closedir(dir);
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}
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return;
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}
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if (S_ISREG(st.st_mode)) {
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read_sha1_reference(path);
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return;
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}
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}
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static void get_default_heads(void)
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{
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char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
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find_file_objects(git_dir, "refs");
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}
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int main(int argc, char **argv)
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{
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int i, heads;
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@ -354,6 +418,16 @@ int main(int argc, char **argv)
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error("expected sha1, got %s", arg);
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}
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/*
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* If we've been asked to do reachability without any explicit
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* head information, do the default ones from .git/refs. We also
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* consider the index file in this case (ie this implies --cache).
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*/
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if (show_unreachable && !heads) {
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get_default_heads();
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keep_cache_objects = 1;
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}
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if (keep_cache_objects) {
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int i;
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read_cache();
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@ -368,15 +442,6 @@ int main(int argc, char **argv)
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}
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}
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if (!heads && !keep_cache_objects) {
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if (show_unreachable) {
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fprintf(stderr, "unable to do reachability without a head nor --cache\n");
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show_unreachable = 0;
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}
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if (!heads)
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fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
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}
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check_connectivity();
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return 0;
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}
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@ -14,19 +14,6 @@ done
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: ${GIT_DIR=.git}
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: ${GIT_OBJECT_DIRECTORY="${SHA1_FILE_DIRECTORY-"$GIT_DIR/objects"}"}
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# Defaulting to include .git/refs/*/* may be debatable from the
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# purist POV but power users can always give explicit parameters
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# to the script anyway.
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case "$#" in
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0)
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x_40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
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x_40="$x_40$x_40$x_40$x_40$x_40$x_40$x_40$x_40"
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set x $(sed -ne "/^$x_40\$/p" \
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"$GIT_DIR"/HEAD "$GIT_DIR"/refs/*/* /dev/null 2>/dev/null)
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shift ;;
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esac
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git-fsck-cache --cache --unreachable "$@" |
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sed -ne '/unreachable /{
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s/unreachable [^ ][^ ]* //
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