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Make the pack-refs interfaces usable from outside
This just basically creates a "pack_refs()" function that could be used by anybody. You pass it in the flags you want as a bitmask (PACK_REFS_ALL and PACK_REFS_PRUNE), and it will do all the heavy lifting. Of course, it's still static, and it's all in the builtin-pack-refs.c file, so it's not actually visible to the outside, but the next step would be to just move it all to a library file (probably refs.c) and expose it. Then we could easily make "git gc" do this too. While I did it, I also made it check the return value of the fflush and fsync stage, to make sure that we don't overwrite the old packed-refs file with something that got truncated due to write errors! Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
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@ -12,9 +12,11 @@ struct ref_to_prune {
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char name[FLEX_ARRAY];
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};
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#define PACK_REFS_PRUNE 0x0001
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#define PACK_REFS_ALL 0x0002
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struct pack_refs_cb_data {
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int prune;
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int all;
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unsigned int flags;
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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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@ -39,7 +41,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
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is_tag_ref = !prefixcmp(path, "refs/tags/");
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/* ALWAYS pack refs that were already packed or are tags */
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if (!cb->all && !is_tag_ref && !(flags & REF_ISPACKED))
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if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref && !(flags & REF_ISPACKED))
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return 0;
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fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path);
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@ -53,7 +55,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
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}
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}
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if (cb->prune && !do_not_prune(flags)) {
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if ((cb->flags & PACK_REFS_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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@ -85,33 +87,13 @@ static void prune_refs(struct ref_to_prune *r)
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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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static int pack_refs(unsigned int flags)
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{
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int fd, i;
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int fd;
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struct pack_refs_cb_data cbdata;
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memset(&cbdata, 0, sizeof(cbdata));
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cbdata.prune = 1;
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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; /* now the default */
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continue;
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}
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if (!strcmp(arg, "--no-prune")) {
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cbdata.prune = 0;
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continue;
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}
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if (!strcmp(arg, "--all")) {
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cbdata.all = 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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cbdata.flags = flags;
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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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@ -123,12 +105,40 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
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fprintf(cbdata.refs_file, "# pack-refs with: peeled \n");
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for_each_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 (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file))
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die("failed to write ref-pack file (%s)", strerror(errno));
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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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if (cbdata.flags & PACK_REFS_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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int cmd_pack_refs(int argc, const char **argv, const char *prefix)
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{
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int i;
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unsigned int flags;
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flags = PACK_REFS_PRUNE;
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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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flags |= PACK_REFS_PRUNE; /* now the default */
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continue;
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}
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if (!strcmp(arg, "--no-prune")) {
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flags &= ~PACK_REFS_PRUNE;
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continue;
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}
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if (!strcmp(arg, "--all")) {
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flags |= PACK_REFS_ALL;
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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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return pack_refs(flags);
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}
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