diff options
Diffstat (limited to 'commit.c')
| -rw-r--r-- | commit.c | 496 |
1 files changed, 123 insertions, 373 deletions
@@ -17,6 +17,8 @@ #include "sha1-lookup.h" #include "wt-status.h" #include "advice.h" +#include "refs.h" +#include "commit-reach.h" static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); @@ -24,40 +26,42 @@ 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)) { + if (!oideq(oid, &c->object.oid)) { warning(_("%s %s is not a commit!"), ref_name, oid_to_hex(oid)); } 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(the_repository, oid->hash, - alloc_commit_node(the_repository)); - 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) @@ -67,7 +71,7 @@ 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; @@ -207,7 +211,7 @@ static int read_graft_file(struct repository *r, const char *graft_file) return 0; } -static void prepare_commit_graft(struct repository *r) +void prepare_commit_graft(struct repository *r) { char *graft_file; @@ -259,18 +263,32 @@ 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 commit_buffer *v = buffer_slab_at(&buffer_slab, commit); + 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( + 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; @@ -283,7 +301,7 @@ 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; @@ -302,14 +320,16 @@ 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; @@ -324,7 +344,7 @@ struct tree *get_commit_tree(const struct commit *commit) 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); + return get_commit_tree_in_graph(the_repository, commit); } struct object_id *get_commit_tree_oid(const struct commit *commit) @@ -345,7 +365,8 @@ void release_commit_memory(struct commit *c) 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) { @@ -362,15 +383,15 @@ 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 check_graph) +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; @@ -382,11 +403,11 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s if (get_oid_hex(bufptr + 5, &parent) < 0) return error("bad tree pointer in commit %s", oid_to_hex(&item->object.oid)); - item->maybe_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(the_repository, &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; @@ -401,7 +422,7 @@ 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; } @@ -409,7 +430,8 @@ 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; @@ -418,12 +440,12 @@ 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); + 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; @@ -434,7 +456,7 @@ int parse_commit_gently(struct commit *item, int quiet_on_missing) return -1; if (item->object.parsed) return 0; - if (parse_commit_in_graph(item)) + if (use_commit_graph && parse_commit_in_graph(the_repository, item)) return 0; buffer = read_object_file(&item->object.oid, &type, &size); if (!buffer) @@ -446,15 +468,21 @@ 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, 0); + + 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)) @@ -630,7 +658,7 @@ 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) @@ -817,364 +845,86 @@ void sort_in_topological_order(struct commit_list **list, enum rev_sort_order so clear_author_date_slab(&author_date); } -/* merge-base stuff */ - -/* Remember to update object flag allocation in object.h */ -#define PARENT1 (1u<<16) -#define PARENT2 (1u<<17) -#define STALE (1u<<18) -#define RESULT (1u<<19) - -static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT); - -static int queue_has_nonstale(struct prio_queue *queue) -{ - int i; - for (i = 0; i < queue->nr; i++) { - struct commit *commit = queue->array[i].data; - if (!(commit->object.flags & STALE)) - return 1; - } - return 0; -} +struct rev_collect { + struct commit **commit; + int nr; + int alloc; + unsigned int initial : 1; +}; -/* 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, - int min_generation) +static void add_one_commit(struct object_id *oid, struct rev_collect *revs) { - 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) { - commit_list_append(one, &result); - return result; - } - prio_queue_put(&queue, one); - - for (i = 0; i < n; i++) { - twos[i]->object.flags |= PARENT2; - prio_queue_put(&queue, twos[i]); - } - - while (queue_has_nonstale(&queue)) { - struct commit *commit = prio_queue_get(&queue); - 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; + struct commit *commit; - if (commit->generation < min_generation) - break; + if (is_null_oid(oid)) + return; - flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); - if (flags == (PARENT1 | PARENT2)) { - if (!(commit->object.flags & RESULT)) { - commit->object.flags |= RESULT; - commit_list_insert_by_date(commit, &result); - } - /* Mark parents of a found merge stale */ - flags |= STALE; - } - parents = commit->parents; - while (parents) { - struct commit *p = parents->item; - parents = parents->next; - if ((p->object.flags & flags) == flags) - continue; - if (parse_commit(p)) - return NULL; - p->object.flags |= flags; - prio_queue_put(&queue, p); - } - } + commit = lookup_commit(the_repository, oid); + if (!commit || + (commit->object.flags & TMP_MARK) || + parse_commit(commit)) + return; - clear_prio_queue(&queue); - return result; + ALLOC_GROW(revs->commit, revs->nr + 1, revs->alloc); + revs->commit[revs->nr++] = commit; + commit->object.flags |= TMP_MARK; } -static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos) +static int collect_one_reflog_ent(struct object_id *ooid, struct object_id *noid, + const char *ident, timestamp_t timestamp, + int tz, const char *message, void *cbdata) { - struct commit_list *list = NULL; - struct commit_list *result = NULL; - int i; + struct rev_collect *revs = cbdata; - for (i = 0; i < n; i++) { - if (one == twos[i]) - /* - * We do not mark this even with RESULT so we do not - * have to clean it up. - */ - return commit_list_insert(one, &result); - } - - if (parse_commit(one)) - return NULL; - for (i = 0; i < n; i++) { - if (parse_commit(twos[i])) - return NULL; + if (revs->initial) { + revs->initial = 0; + add_one_commit(ooid, revs); } - - list = paint_down_to_common(one, n, twos, 0); - - while (list) { - struct commit *commit = pop_commit(&list); - if (!(commit->object.flags & STALE)) - commit_list_insert_by_date(commit, &result); - } - return result; + add_one_commit(noid, revs); + return 0; } -struct commit_list *get_octopus_merge_bases(struct commit_list *in) +struct commit *get_fork_point(const char *refname, struct commit *commit) { - struct commit_list *i, *j, *k, *ret = NULL; + struct object_id oid; + struct rev_collect revs; + struct commit_list *bases; + int i; + struct commit *ret = NULL; - if (!in) - return ret; + memset(&revs, 0, sizeof(revs)); + revs.initial = 1; + for_each_reflog_ent(refname, collect_one_reflog_ent, &revs); - commit_list_insert(in->item, &ret); + if (!revs.nr && !get_oid(refname, &oid)) + add_one_commit(&oid, &revs); - for (i = in->next; i; i = i->next) { - struct commit_list *new_commits = NULL, *end = NULL; + for (i = 0; i < revs.nr; i++) + revs.commit[i]->object.flags &= ~TMP_MARK; - for (j = ret; j; j = j->next) { - struct commit_list *bases; - bases = get_merge_bases(i->item, j->item); - if (!new_commits) - new_commits = bases; - else - end->next = bases; - for (k = bases; k; k = k->next) - end = k; - } - ret = new_commits; - } - return ret; -} + bases = get_merge_bases_many(commit, revs.nr, revs.commit); -static int remove_redundant(struct commit **array, int cnt) -{ /* - * Some commit in the array may be an ancestor of - * another commit. Move such commit to the end of - * the array, and return the number of commits that - * are independent from each other. + * There should be one and only one merge base, when we found + * a common ancestor among reflog entries. */ - struct commit **work; - unsigned char *redundant; - int *filled_index; - int i, j, filled; - - work = xcalloc(cnt, sizeof(*work)); - redundant = xcalloc(cnt, 1); - ALLOC_ARRAY(filled_index, cnt - 1); - - for (i = 0; i < cnt; i++) - 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; - for (j = filled = 0; j < cnt; j++) { - if (i == j || redundant[j]) - 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, - min_generation); - if (array[i]->object.flags & PARENT2) - redundant[i] = 1; - for (j = 0; j < filled; j++) - if (work[j]->object.flags & PARENT1) - redundant[filled_index[j]] = 1; - clear_commit_marks(array[i], all_flags); - clear_commit_marks_many(filled, work, all_flags); - free_commit_list(common); - } - - /* Now collect the result */ - COPY_ARRAY(work, array, cnt); - for (i = filled = 0; i < cnt; i++) - if (!redundant[i]) - array[filled++] = work[i]; - for (j = filled, i = 0; i < cnt; i++) - if (redundant[i]) - array[j++] = work[i]; - free(work); - free(redundant); - free(filled_index); - return filled; -} - -static struct commit_list *get_merge_bases_many_0(struct commit *one, - int n, - struct commit **twos, - int cleanup) -{ - struct commit_list *list; - struct commit **rslt; - struct commit_list *result; - int cnt, i; - - result = merge_bases_many(one, n, twos); - for (i = 0; i < n; i++) { - if (one == twos[i]) - return result; - } - if (!result || !result->next) { - if (cleanup) { - clear_commit_marks(one, all_flags); - clear_commit_marks_many(n, twos, all_flags); - } - return result; - } - - /* There are more than one */ - cnt = commit_list_count(result); - rslt = xcalloc(cnt, sizeof(*rslt)); - for (list = result, i = 0; list; list = list->next) - rslt[i++] = list->item; - free_commit_list(result); - - clear_commit_marks(one, all_flags); - clear_commit_marks_many(n, twos, all_flags); - - cnt = remove_redundant(rslt, cnt); - result = NULL; - for (i = 0; i < cnt; i++) - commit_list_insert_by_date(rslt[i], &result); - free(rslt); - return result; -} - -struct commit_list *get_merge_bases_many(struct commit *one, - int n, - struct commit **twos) -{ - return get_merge_bases_many_0(one, n, twos, 1); -} - -struct commit_list *get_merge_bases_many_dirty(struct commit *one, - int n, - struct commit **twos) -{ - return get_merge_bases_many_0(one, n, twos, 0); -} - -struct commit_list *get_merge_bases(struct commit *one, struct commit *two) -{ - return get_merge_bases_many_0(one, 1, &two, 1); -} - -/* - * Is "commit" a descendant of one of the elements on the "with_commit" list? - */ -int is_descendant_of(struct commit *commit, struct commit_list *with_commit) -{ - if (!with_commit) - return 1; - while (with_commit) { - struct commit *other; - - other = with_commit->item; - with_commit = with_commit->next; - if (in_merge_bases(other, commit)) - return 1; - } - return 0; -} - -/* - * Is "commit" an ancestor of one of the "references"? - */ -int in_merge_bases_many(struct commit *commit, int nr_reference, struct commit **reference) -{ - struct commit_list *bases; - int ret = 0, i; - uint32_t min_generation = GENERATION_NUMBER_INFINITY; + if (!bases || bases->next) + goto cleanup_return; - if (parse_commit(commit)) - return ret; - 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; - } + /* And the found one must be one of the reflog entries */ + for (i = 0; i < revs.nr; i++) + if (&bases->item->object == &revs.commit[i]->object) + break; /* found */ + if (revs.nr <= i) + goto cleanup_return; - if (commit->generation > min_generation) - return ret; + ret = bases->item; - bases = paint_down_to_common(commit, nr_reference, reference, commit->generation); - if (commit->object.flags & PARENT2) - ret = 1; - clear_commit_marks(commit, all_flags); - clear_commit_marks_many(nr_reference, reference, all_flags); +cleanup_return: free_commit_list(bases); return ret; } -/* - * Is "commit" an ancestor of (i.e. reachable from) the "reference"? - */ -int in_merge_bases(struct commit *commit, struct commit *reference) -{ - return in_merge_bases_many(commit, 1, &reference); -} - -struct commit_list *reduce_heads(struct commit_list *heads) -{ - struct commit_list *p; - struct commit_list *result = NULL, **tail = &result; - struct commit **array; - int num_head, i; - - if (!heads) - return NULL; - - /* Uniquify */ - for (p = heads; p; p = p->next) - p->item->object.flags &= ~STALE; - for (p = heads, num_head = 0; p; p = p->next) { - if (p->item->object.flags & STALE) - continue; - p->item->object.flags |= STALE; - num_head++; - } - array = xcalloc(num_head, sizeof(*array)); - for (p = heads, i = 0; p; p = p->next) { - if (p->item->object.flags & STALE) { - array[i++] = p->item; - p->item->object.flags &= ~STALE; - } - } - num_head = remove_redundant(array, num_head); - for (i = 0; i < num_head; i++) - tail = &commit_list_insert(array[i], tail)->next; - free(array); - return result; -} - -void reduce_heads_replace(struct commit_list **heads) -{ - struct commit_list *result = reduce_heads(*heads); - free_commit_list(*heads); - *heads = result; -} - static const char gpg_sig_header[] = "gpgsig"; static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; @@ -1692,7 +1442,7 @@ 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 && !merge_remote_util(commit)) set_merge_remote_desc(commit, name, obj); @@ -1758,10 +1508,10 @@ 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); |