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#include "cache.h" #include "refs.h" #include "object.h" #include "tag.h" static const char builtin_pack_refs_usage[] = "git-pack-refs [--all] [--prune | --no-prune]"; struct ref_to_prune { struct ref_to_prune *next; unsigned char sha1[20]; char name[FLEX_ARRAY]; }; #define PACK_REFS_PRUNE 0x0001 #define PACK_REFS_ALL 0x0002 struct pack_refs_cb_data { unsigned int flags; struct ref_to_prune *ref_to_prune; FILE *refs_file; }; static int do_not_prune(int flags) { /* 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) { 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 = !prefixcmp(path, "refs/tags/"); /* ALWAYS pack refs that were already packed or are tags */ if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref && !(flags & REF_ISPACKED)) return 0; 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->flags & PACK_REFS_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; static int pack_refs(unsigned int flags) { int fd; struct pack_refs_cb_data cbdata; memset(&cbdata, 0, sizeof(cbdata)); cbdata.flags = flags; 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)); /* perhaps other traits later as well */ fprintf(cbdata.refs_file, "# pack-refs with: peeled \n"); for_each_ref(handle_one_ref, &cbdata); if (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file)) die("failed to write ref-pack file (%s)", strerror(errno)); if (commit_lock_file(&packed) < 0) die("unable to overwrite old ref-pack file (%s)", strerror(errno)); if (cbdata.flags & PACK_REFS_PRUNE) prune_refs(cbdata.ref_to_prune); return 0; } int cmd_pack_refs(int argc, const char **argv, const char *prefix) { int i; unsigned int flags; flags = PACK_REFS_PRUNE; for (i = 1; i < argc; i++) { const char *arg = argv[i]; if (!strcmp(arg, "--prune")) { flags |= PACK_REFS_PRUNE; /* now the default */ continue; } if (!strcmp(arg, "--no-prune")) { flags &= ~PACK_REFS_PRUNE; continue; } if (!strcmp(arg, "--all")) { flags |= PACK_REFS_ALL; continue; } /* perhaps other parameters later... */ break; } if (i != argc) usage(builtin_pack_refs_usage); return pack_refs(flags); }
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