#include "cache.h"
#include "refs.h"
+#include "object.h"
+#include "tag.h"
-static const char *result_path, *lock_path;
+static const char builtin_pack_refs_usage[] =
+"git-pack-refs [--all] [--prune]";
-static void remove_lock_file(void)
+struct ref_to_prune {
+ struct ref_to_prune *next;
+ unsigned char sha1[20];
+ char name[FLEX_ARRAY];
+};
+
+struct pack_refs_cb_data {
+ int prune;
+ int all;
+ struct ref_to_prune *ref_to_prune;
+ FILE *refs_file;
+};
+
+static int do_not_prune(int flags)
{
- if (lock_path)
- unlink(lock_path);
+ /* If it is already packed or if it is a symref,
+ * do not prune it.
+ */
+ return (flags & (REF_ISSYMREF|REF_ISPACKED));
}
static int handle_one_ref(const char *path, const unsigned char *sha1,
int flags, void *cb_data)
{
- FILE *refs_file = cb_data;
+ struct pack_refs_cb_data *cb = cb_data;
+ int is_tag_ref;
+
+ /* Do not pack the symbolic refs */
+ if ((flags & REF_ISSYMREF))
+ return 0;
+ is_tag_ref = !strncmp(path, "refs/tags/", 10);
+ if (!cb->all && !is_tag_ref)
+ return 0;
- fprintf(refs_file, "%s %s\n", sha1_to_hex(sha1), path);
+ fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path);
+ if (is_tag_ref) {
+ struct object *o = parse_object(sha1);
+ if (o->type == OBJ_TAG) {
+ o = deref_tag(o, path, 0);
+ if (o)
+ fprintf(cb->refs_file, "^%s\n",
+ sha1_to_hex(o->sha1));
+ }
+ }
+
+ if (cb->prune && !do_not_prune(flags)) {
+ int namelen = strlen(path) + 1;
+ struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
+ hashcpy(n->sha1, sha1);
+ strcpy(n->name, path);
+ n->next = cb->ref_to_prune;
+ cb->ref_to_prune = n;
+ }
return 0;
}
+/* make sure nobody touched the ref, and unlink */
+static void prune_ref(struct ref_to_prune *r)
+{
+ struct ref_lock *lock = lock_ref_sha1(r->name + 5, r->sha1);
+
+ if (lock) {
+ unlink(git_path("%s", r->name));
+ unlock_ref(lock);
+ }
+}
+
+static void prune_refs(struct ref_to_prune *r)
+{
+ while (r) {
+ prune_ref(r);
+ r = r->next;
+ }
+}
+
+static struct lock_file packed;
+
int cmd_pack_refs(int argc, const char **argv, const char *prefix)
{
- int fd;
- FILE *refs_file;
+ int fd, i;
+ struct pack_refs_cb_data cbdata;
+
+ memset(&cbdata, 0, sizeof(cbdata));
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!strcmp(arg, "--prune")) {
+ cbdata.prune = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--all")) {
+ cbdata.all = 1;
+ continue;
+ }
+ /* perhaps other parameters later... */
+ break;
+ }
+ if (i != argc)
+ usage(builtin_pack_refs_usage);
- result_path = xstrdup(git_path("packed-refs"));
- lock_path = xstrdup(mkpath("%s.lock", result_path));
+ fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), 1);
+ cbdata.refs_file = fdopen(fd, "w");
+ if (!cbdata.refs_file)
+ die("unable to create ref-pack file structure (%s)",
+ strerror(errno));
- fd = open(lock_path, O_CREAT | O_EXCL | O_WRONLY, 0666);
- if (fd < 0)
- die("unable to create new ref-pack file (%s)", strerror(errno));
- atexit(remove_lock_file);
+ /* perhaps other traits later as well */
+ fprintf(cbdata.refs_file, "# pack-refs with: peeled \n");
- refs_file = fdopen(fd, "w");
- if (!refs_file)
- die("unable to create ref-pack file structure (%s)", strerror(errno));
- for_each_ref(handle_one_ref, refs_file);
+ for_each_ref(handle_one_ref, &cbdata);
+ fflush(cbdata.refs_file);
fsync(fd);
- fclose(refs_file);
- if (rename(lock_path, result_path) < 0)
+ fclose(cbdata.refs_file);
+ if (commit_lock_file(&packed) < 0)
die("unable to overwrite old ref-pack file (%s)", strerror(errno));
- lock_path = NULL;
+ if (cbdata.prune)
+ prune_refs(cbdata.ref_to_prune);
return 0;
}