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b3d4204fc4
This changes 'git-pack-refs' to pack only tags by default. Branches are meant to be updated, either by committing onto it yourself or tracking remote branches, and packed entries can become stale easily, but tags are usually "create once and live forever" and benefit more from packing. Signed-off-by: Junio C Hamano <junkio@cox.net>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
#include "cache.h"
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#include "refs.h"
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static const char builtin_pack_refs_usage[] =
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"git-pack-refs [--all] [--prune]";
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struct ref_to_prune {
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struct ref_to_prune *next;
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unsigned char sha1[20];
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char name[FLEX_ARRAY];
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};
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struct pack_refs_cb_data {
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int prune;
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struct ref_to_prune *ref_to_prune;
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FILE *refs_file;
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};
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static int do_not_prune(int flags)
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{
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/* If it is already packed or if it is a symref,
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* do not prune it.
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*/
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return (flags & (REF_ISSYMREF|REF_ISPACKED));
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}
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static int handle_one_ref(const char *path, const unsigned char *sha1,
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int flags, void *cb_data)
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{
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struct pack_refs_cb_data *cb = cb_data;
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/* Do not pack the symbolic refs */
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if (!(flags & REF_ISSYMREF))
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fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path);
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if (cb->prune && !do_not_prune(flags)) {
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int namelen = strlen(path) + 1;
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struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
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hashcpy(n->sha1, sha1);
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strcpy(n->name, path);
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n->next = cb->ref_to_prune;
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cb->ref_to_prune = n;
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}
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return 0;
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}
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/* make sure nobody touched the ref, and unlink */
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static void prune_ref(struct ref_to_prune *r)
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{
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struct ref_lock *lock = lock_ref_sha1(r->name + 5, r->sha1);
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if (lock) {
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unlink(git_path("%s", r->name));
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unlock_ref(lock);
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}
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}
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static void prune_refs(struct ref_to_prune *r)
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{
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while (r) {
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prune_ref(r);
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r = r->next;
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}
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}
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static struct lock_file packed;
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int cmd_pack_refs(int argc, const char **argv, const char *prefix)
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{
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int fd, i;
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struct pack_refs_cb_data cbdata;
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int (*iterate_ref)(each_ref_fn, void *) = for_each_tag_ref;
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memset(&cbdata, 0, sizeof(cbdata));
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (!strcmp(arg, "--prune")) {
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cbdata.prune = 1;
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continue;
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}
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if (!strcmp(arg, "--all")) {
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iterate_ref = for_each_ref;
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continue;
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}
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/* perhaps other parameters later... */
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break;
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}
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if (i != argc)
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usage(builtin_pack_refs_usage);
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fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), 1);
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cbdata.refs_file = fdopen(fd, "w");
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if (!cbdata.refs_file)
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die("unable to create ref-pack file structure (%s)",
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strerror(errno));
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iterate_ref(handle_one_ref, &cbdata);
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fflush(cbdata.refs_file);
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fsync(fd);
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fclose(cbdata.refs_file);
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if (commit_lock_file(&packed) < 0)
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die("unable to overwrite old ref-pack file (%s)", strerror(errno));
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if (cbdata.prune)
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prune_refs(cbdata.ref_to_prune);
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return 0;
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}
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