diff options
| -rw-r--r-- | builtin/grep.c | 4 | ||||
| -rw-r--r-- | builtin/prune.c | 4 | ||||
| -rw-r--r-- | bundle.c | 6 | ||||
| -rw-r--r-- | object.c | 10 | ||||
| -rw-r--r-- | object.h | 13 | ||||
| -rw-r--r-- | pack-refs.c | 18 | ||||
| -rw-r--r-- | reachable.c | 4 | ||||
| -rw-r--r-- | refs.c | 49 | ||||
| -rwxr-xr-x | t/t3211-peel-ref.sh | 64 |
9 files changed, 145 insertions, 27 deletions
diff --git a/builtin/grep.c b/builtin/grep.c index 0e1b6c860e..e8f0f92cf7 100644 --- a/builtin/grep.c +++ b/builtin/grep.c @@ -820,9 +820,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix) unsigned char sha1[20]; /* Is it a rev? */ if (!get_sha1(arg, sha1)) { - struct object *object = parse_object(sha1); - if (!object) - die(_("bad object %s"), arg); + struct object *object = parse_object_or_die(sha1, arg); add_object_array(object, arg, &list); continue; } diff --git a/builtin/prune.c b/builtin/prune.c index 8cb8b9186a..85843d4f17 100644 --- a/builtin/prune.c +++ b/builtin/prune.c @@ -149,9 +149,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix) const char *name = *argv++; if (!get_sha1(name, sha1)) { - struct object *object = parse_object(sha1); - if (!object) - die("bad object: %s", name); + struct object *object = parse_object_or_die(sha1, name); add_pending_object(&revs, object, ""); } else @@ -279,12 +279,12 @@ int create_bundle(struct bundle_header *header, const char *path, if (buf.len > 0 && buf.buf[0] == '-') { write_or_die(bundle_fd, buf.buf, buf.len); if (!get_sha1_hex(buf.buf + 1, sha1)) { - struct object *object = parse_object(sha1); + struct object *object = parse_object_or_die(sha1, buf.buf); object->flags |= UNINTERESTING; add_pending_object(&revs, object, xstrdup(buf.buf)); } } else if (!get_sha1_hex(buf.buf, sha1)) { - struct object *object = parse_object(sha1); + struct object *object = parse_object_or_die(sha1, buf.buf); object->flags |= SHOWN; } } @@ -361,7 +361,7 @@ int create_bundle(struct bundle_header *header, const char *path, * end up triggering "empty bundle" * error. */ - obj = parse_object(sha1); + obj = parse_object_or_die(sha1, e->name); obj->flags |= SHOWN; add_pending_object(&revs, obj, e->name); } @@ -185,6 +185,16 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t return obj; } +struct object *parse_object_or_die(const unsigned char *sha1, + const char *name) +{ + struct object *o = parse_object(sha1); + if (o) + return o; + + die(_("unable to parse object: %s"), name ? name : sha1_to_hex(sha1)); +} + struct object *parse_object(const unsigned char *sha1) { unsigned long size; @@ -54,9 +54,20 @@ struct object *lookup_object(const unsigned char *sha1); extern void *create_object(const unsigned char *sha1, int type, void *obj); -/** Returns the object, having parsed it to find out what it is. **/ +/* + * Returns the object, having parsed it to find out what it is. + * + * Returns NULL if the object is missing or corrupt. + */ struct object *parse_object(const unsigned char *sha1); +/* + * Like parse_object, but will die() instead of returning NULL. If the + * "name" parameter is not NULL, it is included in the error message + * (otherwise, the sha1 hex is given). + */ +struct object *parse_object_or_die(const unsigned char *sha1, const char *name); + /* Given the result of read_sha1_file(), returns the object after * parsing it. eaten_p indicates if the object has a borrowed copy * of buffer and the caller should not free() it. diff --git a/pack-refs.c b/pack-refs.c index f09a054228..4461f71a37 100644 --- a/pack-refs.c +++ b/pack-refs.c @@ -27,6 +27,7 @@ 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; + struct object *o; int is_tag_ref; /* Do not pack the symbolic refs */ @@ -39,14 +40,13 @@ static int handle_one_ref(const char *path, const unsigned char *sha1, 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)); - } + + o = parse_object_or_die(sha1, path); + 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)) { @@ -128,7 +128,7 @@ int pack_refs(unsigned int flags) die_errno("unable to create ref-pack file structure"); /* perhaps other traits later as well */ - fprintf(cbdata.refs_file, "# pack-refs with: peeled \n"); + fprintf(cbdata.refs_file, "# pack-refs with: peeled fully-peeled \n"); for_each_ref(handle_one_ref, &cbdata); if (ferror(cbdata.refs_file)) diff --git a/reachable.c b/reachable.c index bf7970661f..e7e6a1e342 100644 --- a/reachable.c +++ b/reachable.c @@ -152,11 +152,9 @@ static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, static int add_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data) { - struct object *object = parse_object(sha1); + struct object *object = parse_object_or_die(sha1, path); struct rev_info *revs = (struct rev_info *)cb_data; - if (!object) - die("bad object ref: %s:%s", path, sha1_to_hex(sha1)); add_pending_object(revs, object, ""); return 0; @@ -804,11 +804,38 @@ static const char *parse_ref_line(char *line, unsigned char *sha1) return line; } +/* + * Read f, which is a packed-refs file, into dir. + * + * A comment line of the form "# pack-refs with: " may contain zero or + * more traits. We interpret the traits as follows: + * + * No traits: + * + * Probably no references are peeled. But if the file contains a + * peeled value for a reference, we will use it. + * + * peeled: + * + * References under "refs/tags/", if they *can* be peeled, *are* + * peeled in this file. References outside of "refs/tags/" are + * probably not peeled even if they could have been, but if we find + * a peeled value for such a reference we will use it. + * + * fully-peeled: + * + * All references in the file that can be peeled are peeled. + * Inversely (and this is more important), any references in the + * file for which no peeled value is recorded is not peelable. This + * trait should typically be written alongside "peeled" for + * compatibility with older clients, but we do not require it + * (i.e., "peeled" is a no-op if "fully-peeled" is set). + */ static void read_packed_refs(FILE *f, struct ref_dir *dir) { struct ref_entry *last = NULL; char refline[PATH_MAX]; - int flag = REF_ISPACKED; + enum { PEELED_NONE, PEELED_TAGS, PEELED_FULLY } peeled = PEELED_NONE; while (fgets(refline, sizeof(refline), f)) { unsigned char sha1[20]; @@ -817,15 +844,20 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir) if (!strncmp(refline, header, sizeof(header)-1)) { const char *traits = refline + sizeof(header) - 1; - if (strstr(traits, " peeled ")) - flag |= REF_KNOWS_PEELED; + if (strstr(traits, " fully-peeled ")) + peeled = PEELED_FULLY; + else if (strstr(traits, " peeled ")) + peeled = PEELED_TAGS; /* perhaps other traits later as well */ continue; } refname = parse_ref_line(refline, sha1); if (refname) { - last = create_ref_entry(refname, sha1, flag, 1); + last = create_ref_entry(refname, sha1, REF_ISPACKED, 1); + if (peeled == PEELED_FULLY || + (peeled == PEELED_TAGS && !prefixcmp(refname, "refs/tags/"))) + last->flag |= REF_KNOWS_PEELED; add_ref(dir, last); continue; } @@ -833,8 +865,15 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir) refline[0] == '^' && strlen(refline) == 42 && refline[41] == '\n' && - !get_sha1_hex(refline + 1, sha1)) + !get_sha1_hex(refline + 1, sha1)) { hashcpy(last->u.value.peeled, sha1); + /* + * Regardless of what the file header said, + * we definitely know the value of *this* + * reference: + */ + last->flag |= REF_KNOWS_PEELED; + } } } diff --git a/t/t3211-peel-ref.sh b/t/t3211-peel-ref.sh new file mode 100755 index 0000000000..d4d7792eae --- /dev/null +++ b/t/t3211-peel-ref.sh @@ -0,0 +1,64 @@ +#!/bin/sh + +test_description='tests for the peel_ref optimization of packed-refs' +. ./test-lib.sh + +test_expect_success 'create annotated tag in refs/tags' ' + test_commit base && + git tag -m annotated foo +' + +test_expect_success 'create annotated tag outside of refs/tags' ' + git update-ref refs/outside/foo refs/tags/foo +' + +# This matches show-ref's output +print_ref() { + echo "$(git rev-parse "$1") $1" +} + +test_expect_success 'set up expected show-ref output' ' + { + print_ref "refs/heads/master" && + print_ref "refs/outside/foo" && + print_ref "refs/outside/foo^{}" && + print_ref "refs/tags/base" && + print_ref "refs/tags/foo" && + print_ref "refs/tags/foo^{}" + } >expect +' + +test_expect_success 'refs are peeled outside of refs/tags (loose)' ' + git show-ref -d >actual && + test_cmp expect actual +' + +test_expect_success 'refs are peeled outside of refs/tags (packed)' ' + git pack-refs --all && + git show-ref -d >actual && + test_cmp expect actual +' + +test_expect_success 'create old-style pack-refs without fully-peeled' ' + # Git no longer writes without fully-peeled, so we just write our own + # from scratch; we could also munge the existing file to remove the + # fully-peeled bits, but that seems even more prone to failure, + # especially if the format ever changes again. At least this way we + # know we are emulating exactly what an older git would have written. + { + echo "# pack-refs with: peeled " && + print_ref "refs/heads/master" && + print_ref "refs/outside/foo" && + print_ref "refs/tags/base" && + print_ref "refs/tags/foo" && + echo "^$(git rev-parse "refs/tags/foo^{}")" + } >tmp && + mv tmp .git/packed-refs +' + +test_expect_success 'refs are peeled outside of refs/tags (old packed)' ' + git show-ref -d >actual && + test_cmp expect actual +' + +test_done |