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fsck-cache: walk the 'refs' directory if the user doesn't give any

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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.
This commit is contained in:
Linus Torvalds 2005-05-18 10:16:14 -07:00
parent b58f23b38a
commit 1024932f01
2 changed files with 74 additions and 22 deletions
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83
fsck-cache.c
View File

@ -296,6 +296,70 @@ static int fsck_dir(int i, char *path)
return 0;
}
static void read_sha1_reference(const char *path)
{
char hexname[60];
unsigned char sha1[20];
int fd = open(path, O_RDONLY), len;
struct object *obj;
if (fd < 0)
return;
len = read(fd, hexname, sizeof(hexname));
close(fd);
if (len < 40)
return;
if (get_sha1_hex(hexname, sha1) < 0)
return;
obj = lookup_object(sha1);
obj->used = 1;
mark_reachable(obj, REACHABLE);
}
static void find_file_objects(const char *base, const char *name)
{
int baselen = strlen(base);
int namelen = strlen(name);
char *path = xmalloc(baselen + namelen + 2);
struct stat st;
memcpy(path, base, baselen);
path[baselen] = '/';
memcpy(path + baselen + 1, name, namelen+1);
if (stat(path, &st) < 0)
return;
/*
* Recurse into directories
*/
if (S_ISDIR(st.st_mode)) {
DIR *dir = opendir(path);
if (dir) {
struct dirent *de;
while ((de = readdir(dir)) != NULL) {
if (de->d_name[0] == '.')
continue;
find_file_objects(path, de->d_name);
}
closedir(dir);
}
return;
}
if (S_ISREG(st.st_mode)) {
read_sha1_reference(path);
return;
}
}
static void get_default_heads(void)
{
char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
find_file_objects(git_dir, "refs");
}
int main(int argc, char **argv)
{
int i, heads;
@ -354,6 +418,16 @@ int main(int argc, char **argv)
error("expected sha1, got %s", arg);
}
/*
* If we've been asked to do reachability without any explicit
* head information, do the default ones from .git/refs. We also
* consider the index file in this case (ie this implies --cache).
*/
if (show_unreachable && !heads) {
get_default_heads();
keep_cache_objects = 1;
}
if (keep_cache_objects) {
int i;
read_cache();
@ -368,15 +442,6 @@ int main(int argc, char **argv)
}
}
if (!heads && !keep_cache_objects) {
if (show_unreachable) {
fprintf(stderr, "unable to do reachability without a head nor --cache\n");
show_unreachable = 0;
}
if (!heads)
fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
}
check_connectivity();
return 0;
}

13
git-prune-script
View File

@ -14,19 +14,6 @@ done
: ${GIT_DIR=.git}
: ${GIT_OBJECT_DIRECTORY="${SHA1_FILE_DIRECTORY-"$GIT_DIR/objects"}"}
# Defaulting to include .git/refs/*/* may be debatable from the
# purist POV but power users can always give explicit parameters
# to the script anyway.
case "$#" in
0)
x_40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
x_40="$x_40$x_40$x_40$x_40$x_40$x_40$x_40$x_40"
set x $(sed -ne "/^$x_40\$/p" \
"$GIT_DIR"/HEAD "$GIT_DIR"/refs/*/* /dev/null 2>/dev/null)
shift ;;
esac
git-fsck-cache --cache --unreachable "$@" |
sed -ne '/unreachable /{
s/unreachable [^ ][^ ]* //