4431fcc4b1
This drops "mustexist" parameter lock_ref_sha1() and lock_any_ref_forupdate() functions take. Signed-off-by: Junio C Hamano <junkio@cox.net>
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
#include "cache.h"
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#include "refs.h"
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static const char *result_path, *lock_path;
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static const char builtin_pack_refs_usage[] =
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"git-pack-refs [--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 void remove_lock_file(void)
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{
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if (lock_path)
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unlink(lock_path);
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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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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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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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/* 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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result_path = xstrdup(git_path("packed-refs"));
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lock_path = xstrdup(mkpath("%s.lock", result_path));
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fd = open(lock_path, O_CREAT | O_EXCL | O_WRONLY, 0666);
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if (fd < 0)
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die("unable to create new ref-pack file (%s)", strerror(errno));
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atexit(remove_lock_file);
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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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for_each_ref(handle_one_ref, &cbdata);
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fsync(fd);
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fclose(cbdata.refs_file);
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if (rename(lock_path, result_path) < 0)
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die("unable to overwrite old ref-pack file (%s)", strerror(errno));
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lock_path = NULL;
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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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