diff options
Diffstat (limited to 'commit.c')
| -rw-r--r-- | commit.c | 254 |
1 files changed, 178 insertions, 76 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 **); @@ -50,7 +55,8 @@ struct commit *lookup_commit(const struct object_id *oid) { struct object *obj = lookup_object(oid->hash); if (!obj) - return create_object(oid->hash, alloc_commit_node()); + return create_object(the_repository, oid->hash, + alloc_commit_node(the_repository)); return object_as_type(obj, OBJ_COMMIT, 0); } @@ -94,43 +100,44 @@ 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) - memmove(commit_graft + pos + 1, - commit_graft + pos, - (commit_graft_nr - pos - 1) * - sizeof(*commit_graft)); - 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; } @@ -172,18 +179,27 @@ 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); @@ -191,47 +207,50 @@ static int read_graft_file(const char *graft_file) return 0; } -static void prepare_commit_graft(void) +static 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; } @@ -268,13 +287,13 @@ const void *get_commit_buffer(const struct commit *commit, unsigned long *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)); if (type != OBJ_COMMIT) die("expected commit for %s, got %s", - oid_to_hex(&commit->object.oid), typename(type)); + oid_to_hex(&commit->object.oid), type_name(type)); if (sizep) *sizep = size; } @@ -297,6 +316,33 @@ void free_commit_buffer(struct commit *commit) } } +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(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); @@ -316,7 +362,7 @@ 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 commit *item, const void *buffer, unsigned long size, int check_graph) { const char *tail = buffer; const char *bufptr = buffer; @@ -333,19 +379,19 @@ 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(&parent); bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ pptr = &item->parents; - graft = lookup_commit_graft(&item->object.oid); + graft = lookup_commit_graft(the_repository, &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; @@ -371,6 +417,9 @@ 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(item); + return 0; } @@ -385,7 +434,9 @@ 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 (parse_commit_in_graph(item)) + return 0; + buffer = read_object_file(&item->object.oid, &type, &size); if (!buffer) return quiet_on_missing ? -1 : error("Could not read %s", @@ -395,7 +446,7 @@ 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(item, buffer, size, 0); if (save_commit_buffer && !ret) { set_commit_buffer(item, buffer, size); return 0; @@ -623,6 +674,24 @@ 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_; @@ -770,11 +839,14 @@ 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; one->object.flags |= PARENT1; if (!n) { @@ -793,6 +865,15 @@ static struct commit_list *paint_down_to_common(struct commit *one, int n, struc struct commit_list *parents; int flags; + if (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)) { @@ -841,7 +922,7 @@ 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); @@ -861,19 +942,19 @@ struct commit_list *get_octopus_merge_bases(struct commit_list *in) commit_list_insert(in->item, &ret); for (i = in->next; i; i = i->next) { - struct commit_list *new = NULL, *end = NULL; + struct commit_list *new_commits = NULL, *end = NULL; for (j = ret; j; j = j->next) { struct commit_list *bases; bases = get_merge_bases(i->item, j->item); - if (!new) - new = bases; + if (!new_commits) + new_commits = bases; else end->next = bases; for (k = bases; k; k = k->next) end = k; } - ret = new; + ret = new_commits; } return ret; } @@ -899,6 +980,7 @@ 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; @@ -907,8 +989,12 @@ 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++) @@ -1018,14 +1104,21 @@ 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); @@ -1208,7 +1301,7 @@ 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); @@ -1290,17 +1383,19 @@ 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) @@ -1380,9 +1475,8 @@ void free_commit_extra_headers(struct commit_extra_header *extra) } } -int commit_tree(const char *msg, size_t msg_len, - const unsigned char *tree, - struct commit_list *parents, unsigned char *ret, +int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, + struct commit_list *parents, struct object_id *ret, const char *author, const char *sign_commit) { struct commit_extra_header *extra = NULL, **tail = &extra; @@ -1511,8 +1605,8 @@ N_("Warning: commit message did not conform to UTF-8.\n" "variable i18n.commitencoding to the encoding your project uses.\n"); int commit_tree_extended(const char *msg, size_t msg_len, - const unsigned char *tree, - struct commit_list *parents, unsigned char *ret, + const struct object_id *tree, + struct commit_list *parents, struct object_id *ret, const char *author, const char *sign_commit, struct commit_extra_header *extra) { @@ -1520,7 +1614,7 @@ int commit_tree_extended(const char *msg, size_t msg_len, int encoding_is_utf8; struct strbuf buffer; - assert_sha1_type(tree, 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."); @@ -1529,7 +1623,7 @@ int commit_tree_extended(const char *msg, size_t msg_len, encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ - strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree)); + strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); /* * NOTE! This ordering means that the same exact tree merged with a @@ -1568,19 +1662,27 @@ int commit_tree_extended(const char *msg, size_t msg_len, goto out; } - result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret); + result = write_object_file(buffer.buf, buffer.len, commit_type, ret); out: strbuf_release(&buffer); 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) @@ -1592,7 +1694,7 @@ struct commit *get_merge_parent(const char *name) return NULL; obj = parse_object(&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; } @@ -1617,11 +1719,11 @@ struct commit *get_merge_parent(const char *name) struct commit_list **commit_list_append(struct commit *commit, struct commit_list **next) { - struct commit_list *new = xmalloc(sizeof(struct commit_list)); - new->item = commit; - *next = new; - new->next = NULL; - return &new->next; + struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); + new_commit->item = commit; + *next = new_commit; + new_commit->next = NULL; + return &new_commit->next; } const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |