diff options
| -rw-r--r-- | builtin-pack-refs.c | 24 | ||||
| -rw-r--r-- | builtin-show-ref.c | 36 | ||||
| -rw-r--r-- | refs.c | 73 | ||||
| -rw-r--r-- | refs.h | 4 |
4 files changed, 117 insertions, 20 deletions
diff --git a/builtin-pack-refs.c b/builtin-pack-refs.c index 042d2718f9..ee5a5565af 100644 --- a/builtin-pack-refs.c +++ b/builtin-pack-refs.c @@ -1,5 +1,7 @@ #include "cache.h" #include "refs.h" +#include "object.h" +#include "tag.h" static const char builtin_pack_refs_usage[] = "git-pack-refs [--all] [--prune]"; @@ -29,12 +31,26 @@ 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; - if (!cb->all && strncmp(path, "refs/tags/", 10)) - return 0; /* Do not pack the symbolic refs */ - if (!(flags & REF_ISSYMREF)) - fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path); + if ((flags & REF_ISSYMREF)) + return 0; + is_tag_ref = !strncmp(path, "refs/tags/", 10); + if (!cb->all && !is_tag_ref) + 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 %s^{}\n", + sha1_to_hex(o->sha1), path); + } + } + if (cb->prune && !do_not_prune(flags)) { int namelen = strlen(path) + 1; struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen); diff --git a/builtin-show-ref.c b/builtin-show-ref.c index 06ec400d7f..9ae3d08546 100644 --- a/builtin-show-ref.c +++ b/builtin-show-ref.c @@ -13,6 +13,7 @@ static int show_ref(const char *refname, const unsigned char *sha1, int flag, vo { struct object *obj; const char *hex; + unsigned char peeled[20]; if (tags_only || heads_only) { int match; @@ -44,12 +45,15 @@ static int show_ref(const char *refname, const unsigned char *sha1, int flag, vo match: found_match++; - obj = parse_object(sha1); - if (!obj) { - if (quiet) - return 0; - die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1)); - } + + /* This changes the semantics slightly that even under quiet we + * detect and return error if the repository is corrupt and + * ref points at a nonexistent object. + */ + if (!has_sha1_file(sha1)) + die("git-show-ref: bad ref %s (%s)", refname, + sha1_to_hex(sha1)); + if (quiet) return 0; @@ -58,11 +62,25 @@ match: printf("%s\n", hex); else printf("%s %s\n", hex, refname); - if (deref_tags && obj->type == OBJ_TAG) { - obj = deref_tag(obj, refname, 0); - hex = find_unique_abbrev(obj->sha1, abbrev); + + if (!deref_tags) + return 0; + + if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) { + hex = find_unique_abbrev(peeled, abbrev); printf("%s %s^{}\n", hex, refname); } + else { + obj = parse_object(sha1); + if (!obj) + die("git-show-ref: bad ref %s (%s)", refname, + sha1_to_hex(sha1)); + if (obj->type == OBJ_TAG) { + obj = deref_tag(obj, refname, 0); + hex = find_unique_abbrev(obj->sha1, abbrev); + printf("%s %s^{}\n", hex, refname); + } + } return 0; } @@ -1,16 +1,18 @@ #include "refs.h" #include "cache.h" +#include "object.h" +#include "tag.h" #include <errno.h> struct ref_list { struct ref_list *next; - unsigned char flag; /* ISSYMREF? ISPACKED? */ + unsigned char flag; /* ISSYMREF? ISPACKED? ISPEELED? */ unsigned char sha1[20]; char name[FLEX_ARRAY]; }; -static const char *parse_ref_line(char *line, unsigned char *sha1) +static const char *parse_ref_line(char *line, unsigned char *sha1, int *flag) { /* * 42: the answer to everything. @@ -21,6 +23,7 @@ static const char *parse_ref_line(char *line, unsigned char *sha1) * +1 (newline at the end of the line) */ int len = strlen(line) - 42; + int peeled = 0; if (len <= 0) return NULL; @@ -29,11 +32,24 @@ static const char *parse_ref_line(char *line, unsigned char *sha1) if (!isspace(line[40])) return NULL; line += 41; - if (isspace(*line)) - return NULL; + + if (isspace(*line)) { + /* "SHA-1 SP SP refs/tags/tagname^{} LF"? */ + line++; + len--; + peeled = 1; + } if (line[len] != '\n') return NULL; line[len] = 0; + + if (peeled && (len < 3 || strcmp(line + len - 3, "^{}"))) + return NULL; + + if (!peeled) + *flag &= ~REF_ISPEELED; + else + *flag |= REF_ISPEELED; return line; } @@ -108,10 +124,12 @@ static struct ref_list *get_packed_refs(void) char refline[PATH_MAX]; while (fgets(refline, sizeof(refline), f)) { unsigned char sha1[20]; - const char *name = parse_ref_line(refline, sha1); + int flag = REF_ISPACKED; + const char *name = + parse_ref_line(refline, sha1, &flag); if (!name) continue; - list = add_ref(name, sha1, REF_ISPACKED, list); + list = add_ref(name, sha1, flag, list); } fclose(f); refs = list; @@ -207,7 +225,8 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int * if (lstat(path, &st) < 0) { struct ref_list *list = get_packed_refs(); while (list) { - if (!strcmp(ref, list->name)) { + if (!(list->flag & REF_ISPEELED) && + !strcmp(ref, list->name)) { hashcpy(sha1, list->sha1); if (flag) *flag |= REF_ISPACKED; @@ -329,6 +348,8 @@ static int do_one_ref(const char *base, each_ref_fn fn, int trim, return 0; if (is_null_sha1(entry->sha1)) return 0; + if (entry->flag & REF_ISPEELED) + return 0; if (!has_sha1_file(entry->sha1)) { error("%s does not point to a valid object!", entry->name); return 0; @@ -336,6 +357,44 @@ static int do_one_ref(const char *base, each_ref_fn fn, int trim, return fn(entry->name + trim, entry->sha1, entry->flag, cb_data); } +int peel_ref(const char *ref, unsigned char *sha1) +{ + int flag; + unsigned char base[20]; + struct object *o; + + if (!resolve_ref(ref, base, 1, &flag)) + return -1; + + if ((flag & REF_ISPACKED)) { + struct ref_list *list = get_packed_refs(); + int len = strlen(ref); + + while (list) { + if ((list->flag & REF_ISPEELED) && + !strncmp(list->name, ref, len) && + strlen(list->name) == len + 3 && + !strcmp(list->name + len, "^{}")) { + hashcpy(sha1, list->sha1); + return 0; + } + list = list->next; + } + /* older pack-refs did not leave peeled ones in */ + } + + /* otherwise ... */ + o = parse_object(base); + if (o->type == OBJ_TAG) { + o = deref_tag(o, ref, 0); + if (o) { + hashcpy(sha1, o->sha1); + return 0; + } + } + return -1; +} + static int do_for_each_ref(const char *base, each_ref_fn fn, int trim, void *cb_data) { @@ -16,6 +16,8 @@ struct ref_lock { */ #define REF_ISSYMREF 01 #define REF_ISPACKED 02 +#define REF_ISPEELED 04 /* internal use */ + typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data); extern int head_ref(each_ref_fn, void *); extern int for_each_ref(each_ref_fn, void *); @@ -23,6 +25,8 @@ extern int for_each_tag_ref(each_ref_fn, void *); extern int for_each_branch_ref(each_ref_fn, void *); extern int for_each_remote_ref(each_ref_fn, void *); +extern int peel_ref(const char *, unsigned char *); + /** Reads the refs file specified into sha1 **/ extern int get_ref_sha1(const char *ref, unsigned char *sha1); |