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134 lines
3.2 KiB
134 lines
3.2 KiB
#include "builtin.h" |
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#include "cache.h" |
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#include "refs.h" |
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#include "object.h" |
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#include "tag.h" |
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#include "parse-options.h" |
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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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#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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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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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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int is_tag_ref; |
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/* Do not pack the symbolic refs */ |
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if ((flags & REF_ISSYMREF)) |
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return 0; |
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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->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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if (is_tag_ref) { |
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struct object *o = parse_object(sha1); |
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if (o->type == OBJ_TAG) { |
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o = deref_tag(o, path, 0); |
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if (o) |
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fprintf(cb->refs_file, "^%s\n", |
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sha1_to_hex(o->sha1)); |
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} |
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} |
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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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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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static int pack_refs(unsigned int flags) |
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{ |
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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.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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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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/* perhaps other traits later as well */ |
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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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if (ferror(cbdata.refs_file)) |
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die("failed to write ref-pack 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.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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static char const * const pack_refs_usage[] = { |
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"git-pack-refs [options]", |
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NULL |
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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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unsigned int flags = PACK_REFS_PRUNE; |
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struct option opts[] = { |
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OPT_BIT(0, "all", &flags, "pack everything", PACK_REFS_ALL), |
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OPT_BIT(0, "prune", &flags, "prune loose refs (default)", PACK_REFS_PRUNE), |
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OPT_END(), |
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}; |
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if (parse_options(argc, argv, opts, pack_refs_usage, 0)) |
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usage_with_options(pack_refs_usage, opts); |
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return pack_refs(flags); |
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}
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