diff options
Diffstat (limited to 'commit.c')
| -rw-r--r-- | commit.c | 310 |
1 files changed, 222 insertions, 88 deletions
@@ -1,17 +1,22 @@ #include "cache.h" #include "tag.h" #include "commit.h" +#include "commit-graph.h" +#include "repository.h" +#include "object-store.h" #include "pkt-line.h" #include "utf8.h" #include "diff.h" #include "revision.h" #include "notes.h" +#include "alloc.h" #include "gpg-interface.h" #include "mergesort.h" #include "commit-slab.h" #include "prio-queue.h" #include "sha1-lookup.h" #include "wt-status.h" +#include "advice.h" static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); @@ -19,24 +24,26 @@ int save_commit_buffer = 1; const char *commit_type = "commit"; -struct commit *lookup_commit_reference_gently(const struct object_id *oid, - int quiet) +struct commit *lookup_commit_reference_gently(struct repository *r, + const struct object_id *oid, int quiet) { - struct object *obj = deref_tag(parse_object(oid), NULL, 0); + struct object *obj = deref_tag(r, + parse_object(r, oid), + NULL, 0); if (!obj) return NULL; - return object_as_type(obj, OBJ_COMMIT, quiet); + return object_as_type(r, obj, OBJ_COMMIT, quiet); } -struct commit *lookup_commit_reference(const struct object_id *oid) +struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid) { - return lookup_commit_reference_gently(oid, 0); + return lookup_commit_reference_gently(r, oid, 0); } struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) { - struct commit *c = lookup_commit_reference(oid); + struct commit *c = lookup_commit_reference(the_repository, oid); if (!c) die(_("could not parse %s"), ref_name); if (oidcmp(oid, &c->object.oid)) { @@ -46,12 +53,13 @@ struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref return c; } -struct commit *lookup_commit(const struct object_id *oid) +struct commit *lookup_commit(struct repository *r, const struct object_id *oid) { - struct object *obj = lookup_object(oid->hash); + struct object *obj = lookup_object(r, oid->hash); if (!obj) - return create_object(oid->hash, alloc_commit_node()); - return object_as_type(obj, OBJ_COMMIT, 0); + return create_object(r, oid->hash, + alloc_commit_node(r)); + return object_as_type(r, obj, OBJ_COMMIT, 0); } struct commit *lookup_commit_reference_by_name(const char *name) @@ -61,7 +69,7 @@ struct commit *lookup_commit_reference_by_name(const char *name) if (get_oid_committish(name, &oid)) return NULL; - commit = lookup_commit_reference(&oid); + commit = lookup_commit_reference(the_repository, &oid); if (parse_commit(commit)) return NULL; return commit; @@ -94,41 +102,44 @@ static timestamp_t parse_commit_date(const char *buf, const char *tail) return parse_timestamp(dateptr, NULL, 10); } -static struct commit_graft **commit_graft; -static int commit_graft_alloc, commit_graft_nr; - static const unsigned char *commit_graft_sha1_access(size_t index, void *table) { struct commit_graft **commit_graft_table = table; return commit_graft_table[index]->oid.hash; } -static int commit_graft_pos(const unsigned char *sha1) +static int commit_graft_pos(struct repository *r, const unsigned char *sha1) { - return sha1_pos(sha1, commit_graft, commit_graft_nr, + return sha1_pos(sha1, r->parsed_objects->grafts, + r->parsed_objects->grafts_nr, commit_graft_sha1_access); } -int register_commit_graft(struct commit_graft *graft, int ignore_dups) +int register_commit_graft(struct repository *r, struct commit_graft *graft, + int ignore_dups) { - int pos = commit_graft_pos(graft->oid.hash); + int pos = commit_graft_pos(r, graft->oid.hash); if (0 <= pos) { if (ignore_dups) free(graft); else { - free(commit_graft[pos]); - commit_graft[pos] = graft; + free(r->parsed_objects->grafts[pos]); + r->parsed_objects->grafts[pos] = graft; } return 1; } pos = -pos - 1; - ALLOC_GROW(commit_graft, commit_graft_nr + 1, commit_graft_alloc); - commit_graft_nr++; - if (pos < commit_graft_nr) - MOVE_ARRAY(commit_graft + pos + 1, commit_graft + pos, - commit_graft_nr - pos - 1); - commit_graft[pos] = graft; + ALLOC_GROW(r->parsed_objects->grafts, + r->parsed_objects->grafts_nr + 1, + r->parsed_objects->grafts_alloc); + r->parsed_objects->grafts_nr++; + if (pos < r->parsed_objects->grafts_nr) + memmove(r->parsed_objects->grafts + pos + 1, + r->parsed_objects->grafts + pos, + (r->parsed_objects->grafts_nr - pos - 1) * + sizeof(*r->parsed_objects->grafts)); + r->parsed_objects->grafts[pos] = graft; return 0; } @@ -170,18 +181,27 @@ bad_graft_data: return NULL; } -static int read_graft_file(const char *graft_file) +static int read_graft_file(struct repository *r, const char *graft_file) { FILE *fp = fopen_or_warn(graft_file, "r"); struct strbuf buf = STRBUF_INIT; if (!fp) return -1; + if (advice_graft_file_deprecated) + advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n" + "and will be removed in a future Git version.\n" + "\n" + "Please use \"git replace --convert-graft-file\"\n" + "to convert the grafts into replace refs.\n" + "\n" + "Turn this message off by running\n" + "\"git config advice.graftFileDeprecated false\"")); while (!strbuf_getwholeline(&buf, fp, '\n')) { /* The format is just "Commit Parent1 Parent2 ...\n" */ struct commit_graft *graft = read_graft_line(&buf); if (!graft) continue; - if (register_commit_graft(graft, 1)) + if (register_commit_graft(r, graft, 1)) error("duplicate graft data: %s", buf.buf); } fclose(fp); @@ -189,47 +209,50 @@ static int read_graft_file(const char *graft_file) return 0; } -static void prepare_commit_graft(void) +void prepare_commit_graft(struct repository *r) { - static int commit_graft_prepared; char *graft_file; - if (commit_graft_prepared) + if (r->parsed_objects->commit_graft_prepared) + return; + if (!startup_info->have_repository) return; - graft_file = get_graft_file(); - read_graft_file(graft_file); + + graft_file = get_graft_file(r); + read_graft_file(r, graft_file); /* make sure shallows are read */ - is_repository_shallow(); - commit_graft_prepared = 1; + is_repository_shallow(r); + r->parsed_objects->commit_graft_prepared = 1; } -struct commit_graft *lookup_commit_graft(const struct object_id *oid) +struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid) { int pos; - prepare_commit_graft(); - pos = commit_graft_pos(oid->hash); + prepare_commit_graft(r); + pos = commit_graft_pos(r, oid->hash); if (pos < 0) return NULL; - return commit_graft[pos]; + return r->parsed_objects->grafts[pos]; } int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) { int i, ret; - for (i = ret = 0; i < commit_graft_nr && !ret; i++) - ret = fn(commit_graft[i], cb_data); + for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++) + ret = fn(the_repository->parsed_objects->grafts[i], cb_data); return ret; } int unregister_shallow(const struct object_id *oid) { - int pos = commit_graft_pos(oid->hash); + int pos = commit_graft_pos(the_repository, oid->hash); if (pos < 0) return -1; - if (pos + 1 < commit_graft_nr) - MOVE_ARRAY(commit_graft + pos, commit_graft + pos + 1, - commit_graft_nr - pos - 1); - commit_graft_nr--; + if (pos + 1 < the_repository->parsed_objects->grafts_nr) + MOVE_ARRAY(the_repository->parsed_objects->grafts + pos, + the_repository->parsed_objects->grafts + pos + 1, + the_repository->parsed_objects->grafts_nr - pos - 1); + the_repository->parsed_objects->grafts_nr--; return 0; } @@ -238,18 +261,32 @@ struct commit_buffer { unsigned long size; }; define_commit_slab(buffer_slab, struct commit_buffer); -static struct buffer_slab buffer_slab = COMMIT_SLAB_INIT(1, buffer_slab); -void set_commit_buffer(struct commit *commit, void *buffer, unsigned long size) +struct buffer_slab *allocate_commit_buffer_slab(void) +{ + struct buffer_slab *bs = xmalloc(sizeof(*bs)); + init_buffer_slab(bs); + return bs; +} + +void free_commit_buffer_slab(struct buffer_slab *bs) +{ + clear_buffer_slab(bs); + free(bs); +} + +void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size) { - struct commit_buffer *v = buffer_slab_at(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_at( + r->parsed_objects->buffer_slab, commit); v->buffer = buffer; v->size = size; } -const void *get_cached_commit_buffer(const struct commit *commit, unsigned long *sizep) +const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep) { - struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek( + r->parsed_objects->buffer_slab, commit); if (!v) { if (sizep) *sizep = 0; @@ -262,11 +299,11 @@ const void *get_cached_commit_buffer(const struct commit *commit, unsigned long const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) { - const void *ret = get_cached_commit_buffer(commit, sizep); + const void *ret = get_cached_commit_buffer(the_repository, commit, sizep); if (!ret) { enum object_type type; unsigned long size; - ret = read_sha1_file(commit->object.oid.hash, &type, &size); + ret = read_object_file(&commit->object.oid, &type, &size); if (!ret) die("cannot read commit object %s", oid_to_hex(&commit->object.oid)); @@ -281,23 +318,53 @@ const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) void unuse_commit_buffer(const struct commit *commit, const void *buffer) { - struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek( + the_repository->parsed_objects->buffer_slab, commit); if (!(v && v->buffer == buffer)) free((void *)buffer); } void free_commit_buffer(struct commit *commit) { - struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek( + the_repository->parsed_objects->buffer_slab, commit); if (v) { FREE_AND_NULL(v->buffer); v->size = 0; } } +struct tree *get_commit_tree(const struct commit *commit) +{ + if (commit->maybe_tree || !commit->object.parsed) + return commit->maybe_tree; + + if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH) + BUG("commit has NULL tree, but was not loaded from commit-graph"); + + return get_commit_tree_in_graph(the_repository, commit); +} + +struct object_id *get_commit_tree_oid(const struct commit *commit) +{ + return &get_commit_tree(commit)->object.oid; +} + +void release_commit_memory(struct commit *c) +{ + c->maybe_tree = NULL; + c->index = 0; + free_commit_buffer(c); + free_commit_list(c->parents); + /* TODO: what about commit->util? */ + + c->object.parsed = 0; +} + const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) { - struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit); + struct commit_buffer *v = buffer_slab_peek( + the_repository->parsed_objects->buffer_slab, commit); void *ret; if (!v) { @@ -314,15 +381,15 @@ const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) return ret; } -int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size) +int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph) { const char *tail = buffer; const char *bufptr = buffer; struct object_id parent; struct commit_list **pptr; struct commit_graft *graft; - const int tree_entry_len = GIT_SHA1_HEXSZ + 5; - const int parent_entry_len = GIT_SHA1_HEXSZ + 7; + const int tree_entry_len = the_hash_algo->hexsz + 5; + const int parent_entry_len = the_hash_algo->hexsz + 7; if (item->object.parsed) return 0; @@ -331,19 +398,19 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || bufptr[tree_entry_len] != '\n') return error("bogus commit object %s", oid_to_hex(&item->object.oid)); - if (get_sha1_hex(bufptr + 5, parent.hash) < 0) + if (get_oid_hex(bufptr + 5, &parent) < 0) return error("bad tree pointer in commit %s", oid_to_hex(&item->object.oid)); - item->tree = lookup_tree(&parent); + item->maybe_tree = lookup_tree(r, &parent); bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ pptr = &item->parents; - graft = lookup_commit_graft(&item->object.oid); + graft = lookup_commit_graft(r, &item->object.oid); while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { struct commit *new_parent; if (tail <= bufptr + parent_entry_len + 1 || - get_sha1_hex(bufptr + 7, parent.hash) || + get_oid_hex(bufptr + 7, &parent) || bufptr[parent_entry_len] != '\n') return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); bufptr += parent_entry_len + 1; @@ -353,7 +420,7 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s */ if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) continue; - new_parent = lookup_commit(&parent); + new_parent = lookup_commit(r, &parent); if (new_parent) pptr = &commit_list_insert(new_parent, pptr)->next; } @@ -361,7 +428,8 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s int i; struct commit *new_parent; for (i = 0; i < graft->nr_parent; i++) { - new_parent = lookup_commit(&graft->parent[i]); + new_parent = lookup_commit(r, + &graft->parent[i]); if (!new_parent) continue; pptr = &commit_list_insert(new_parent, pptr)->next; @@ -369,10 +437,13 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s } item->date = parse_commit_date(bufptr, tail); + if (check_graph) + load_commit_graph_info(the_repository, item); + return 0; } -int parse_commit_gently(struct commit *item, int quiet_on_missing) +int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_commit_graph) { enum object_type type; void *buffer; @@ -383,7 +454,9 @@ int parse_commit_gently(struct commit *item, int quiet_on_missing) return -1; if (item->object.parsed) return 0; - buffer = read_sha1_file(item->object.oid.hash, &type, &size); + if (use_commit_graph && parse_commit_in_graph(the_repository, item)) + return 0; + buffer = read_object_file(&item->object.oid, &type, &size); if (!buffer) return quiet_on_missing ? -1 : error("Could not read %s", @@ -393,15 +466,21 @@ int parse_commit_gently(struct commit *item, int quiet_on_missing) return error("Object %s not a commit", oid_to_hex(&item->object.oid)); } - ret = parse_commit_buffer(item, buffer, size); + + ret = parse_commit_buffer(the_repository, item, buffer, size, 0); if (save_commit_buffer && !ret) { - set_commit_buffer(item, buffer, size); + set_commit_buffer(the_repository, item, buffer, size); return 0; } free(buffer); return ret; } +int parse_commit_gently(struct commit *item, int quiet_on_missing) +{ + return parse_commit_internal(item, quiet_on_missing, 1); +} + void parse_commit_or_die(struct commit *item) { if (parse_commit(item)) @@ -577,7 +656,7 @@ struct commit *pop_commit(struct commit_list **stack) define_commit_slab(indegree_slab, int); /* record author-date for each commit object */ -define_commit_slab(author_date_slab, unsigned long); +define_commit_slab(author_date_slab, timestamp_t); static void record_author_date(struct author_date_slab *author_date, struct commit *commit) @@ -621,6 +700,24 @@ static int compare_commits_by_author_date(const void *a_, const void *b_, return 0; } +int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused) +{ + const struct commit *a = a_, *b = b_; + + /* newer commits first */ + if (a->generation < b->generation) + return 1; + else if (a->generation > b->generation) + return -1; + + /* use date as a heuristic when generations are equal */ + if (a->date < b->date) + return 1; + else if (a->date > b->date) + return -1; + return 0; +} + int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) { const struct commit *a = a_, *b = b_; @@ -768,11 +865,17 @@ static int queue_has_nonstale(struct prio_queue *queue) } /* all input commits in one and twos[] must have been parsed! */ -static struct commit_list *paint_down_to_common(struct commit *one, int n, struct commit **twos) +static struct commit_list *paint_down_to_common(struct commit *one, int n, + struct commit **twos, + int min_generation) { - struct prio_queue queue = { compare_commits_by_commit_date }; + struct prio_queue queue = { compare_commits_by_gen_then_commit_date }; struct commit_list *result = NULL; int i; + uint32_t last_gen = GENERATION_NUMBER_INFINITY; + + if (!min_generation) + queue.compare = compare_commits_by_commit_date; one->object.flags |= PARENT1; if (!n) { @@ -791,6 +894,15 @@ static struct commit_list *paint_down_to_common(struct commit *one, int n, struc struct commit_list *parents; int flags; + if (min_generation && commit->generation > last_gen) + BUG("bad generation skip %8x > %8x at %s", + commit->generation, last_gen, + oid_to_hex(&commit->object.oid)); + last_gen = commit->generation; + + if (commit->generation < min_generation) + break; + flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); if (flags == (PARENT1 | PARENT2)) { if (!(commit->object.flags & RESULT)) { @@ -839,7 +951,7 @@ static struct commit_list *merge_bases_many(struct commit *one, int n, struct co return NULL; } - list = paint_down_to_common(one, n, twos); + list = paint_down_to_common(one, n, twos, 0); while (list) { struct commit *commit = pop_commit(&list); @@ -897,6 +1009,7 @@ static int remove_redundant(struct commit **array, int cnt) parse_commit(array[i]); for (i = 0; i < cnt; i++) { struct commit_list *common; + uint32_t min_generation = array[i]->generation; if (redundant[i]) continue; @@ -905,8 +1018,12 @@ static int remove_redundant(struct commit **array, int cnt) continue; filled_index[filled] = j; work[filled++] = array[j]; + + if (array[j]->generation < min_generation) + min_generation = array[j]->generation; } - common = paint_down_to_common(array[i], filled, work); + common = paint_down_to_common(array[i], filled, work, + min_generation); if (array[i]->object.flags & PARENT2) redundant[i] = 1; for (j = 0; j < filled; j++) @@ -1016,14 +1133,21 @@ int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit * { struct commit_list *bases; int ret = 0, i; + uint32_t min_generation = GENERATION_NUMBER_INFINITY; if (parse_commit(commit)) return ret; - for (i = 0; i < nr_reference; i++) + for (i = 0; i < nr_reference; i++) { if (parse_commit(reference[i])) return ret; + if (reference[i]->generation < min_generation) + min_generation = reference[i]->generation; + } + + if (commit->generation > min_generation) + return ret; - bases = paint_down_to_common(commit, nr_reference, reference); + bases = paint_down_to_common(commit, nr_reference, reference, commit->generation); if (commit->object.flags & PARENT2) ret = 1; clear_commit_marks(commit, all_flags); @@ -1206,7 +1330,7 @@ static void handle_signed_tag(struct commit *parent, struct commit_extra_header desc = merge_remote_util(parent); if (!desc || !desc->obj) return; - buf = read_sha1_file(desc->obj->oid.hash, &type, &size); + buf = read_object_file(&desc->obj->oid, &type, &size); if (!buf || type != OBJ_TAG) goto free_return; len = parse_signature(buf, size); @@ -1288,17 +1412,19 @@ struct commit_extra_header *read_commit_extra_headers(struct commit *commit, return extra; } -void for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) +int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) { struct commit_extra_header *extra, *to_free; + int res = 0; to_free = read_commit_extra_headers(commit, NULL); - for (extra = to_free; extra; extra = extra->next) { + for (extra = to_free; !res && extra; extra = extra->next) { if (strcmp(extra->key, "mergetag")) continue; /* not a merge tag */ - fn(commit, extra, data); + res = fn(commit, extra, data); } free_commit_extra_headers(to_free); + return res; } static inline int standard_header_field(const char *field, size_t len) @@ -1517,7 +1643,7 @@ int commit_tree_extended(const char *msg, size_t msg_len, int encoding_is_utf8; struct strbuf buffer; - assert_sha1_type(tree->hash, OBJ_TREE); + assert_oid_type(tree, OBJ_TREE); if (memchr(msg, '\0', msg_len)) return error("a NUL byte in commit log message not allowed."); @@ -1571,13 +1697,21 @@ out: return result; } +define_commit_slab(merge_desc_slab, struct merge_remote_desc *); +static struct merge_desc_slab merge_desc_slab = COMMIT_SLAB_INIT(1, merge_desc_slab); + +struct merge_remote_desc *merge_remote_util(struct commit *commit) +{ + return *merge_desc_slab_at(&merge_desc_slab, commit); +} + void set_merge_remote_desc(struct commit *commit, const char *name, struct object *obj) { struct merge_remote_desc *desc; FLEX_ALLOC_STR(desc, name, name); desc->obj = obj; - commit->util = desc; + *merge_desc_slab_at(&merge_desc_slab, commit) = desc; } struct commit *get_merge_parent(const char *name) @@ -1587,9 +1721,9 @@ struct commit *get_merge_parent(const char *name) struct object_id oid; if (get_oid(name, &oid)) return NULL; - obj = parse_object(&oid); + obj = parse_object(the_repository, &oid); commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); - if (commit && !commit->util) + if (commit && !merge_remote_util(commit)) set_merge_remote_desc(commit, name, obj); return commit; } @@ -1653,10 +1787,10 @@ const char *find_commit_header(const char *msg, const char *key, size_t *out_len * Returns the number of bytes from the tail to ignore, to be fed as * the second parameter to append_signoff(). */ -int ignore_non_trailer(const char *buf, size_t len) +size_t ignore_non_trailer(const char *buf, size_t len) { - int boc = 0; - int bol = 0; + size_t boc = 0; + size_t bol = 0; int in_old_conflicts_block = 0; size_t cutoff = wt_status_locate_end(buf, len); |