#include "cache.h" #include "tag.h" #include "blob.h" #include "tree.h" #include "commit.h" #include "diff.h" #include "refs.h" #include "revision.h" #include "graph.h" #include "grep.h" #include "reflog-walk.h" #include "patch-ids.h" #include "decorate.h" #include "log-tree.h" #include "string-list.h" volatile show_early_output_fn_t show_early_output; char *path_name(const struct name_path *path, const char *name) { const struct name_path *p; char *n, *m; int nlen = strlen(name); int len = nlen + 1; for (p = path; p; p = p->up) { if (p->elem_len) len += p->elem_len + 1; } n = xmalloc(len); m = n + len - (nlen + 1); strcpy(m, name); for (p = path; p; p = p->up) { if (p->elem_len) { m -= p->elem_len + 1; memcpy(m, p->elem, p->elem_len); m[p->elem_len] = '/'; } } return n; } void add_object(struct object *obj, struct object_array *p, struct name_path *path, const char *name) { add_object_array(obj, path_name(path, name), p); } static void mark_blob_uninteresting(struct blob *blob) { if (!blob) return; if (blob->object.flags & UNINTERESTING) return; blob->object.flags |= UNINTERESTING; } void mark_tree_uninteresting(struct tree *tree) { struct tree_desc desc; struct name_entry entry; struct object *obj = &tree->object; if (!tree) return; if (obj->flags & UNINTERESTING) return; obj->flags |= UNINTERESTING; if (!has_sha1_file(obj->sha1)) return; if (parse_tree(tree) < 0) die("bad tree %s", sha1_to_hex(obj->sha1)); init_tree_desc(&desc, tree->buffer, tree->size); while (tree_entry(&desc, &entry)) { switch (object_type(entry.mode)) { case OBJ_TREE: mark_tree_uninteresting(lookup_tree(entry.sha1)); break; case OBJ_BLOB: mark_blob_uninteresting(lookup_blob(entry.sha1)); break; default: /* Subproject commit - not in this repository */ break; } } /* * We don't care about the tree any more * after it has been marked uninteresting. */ free(tree->buffer); tree->buffer = NULL; } void mark_parents_uninteresting(struct commit *commit) { struct commit_list *parents = commit->parents; while (parents) { struct commit *commit = parents->item; if (!(commit->object.flags & UNINTERESTING)) { commit->object.flags |= UNINTERESTING; /* * Normally we haven't parsed the parent * yet, so we won't have a parent of a parent * here. However, it may turn out that we've * reached this commit some other way (where it * wasn't uninteresting), in which case we need * to mark its parents recursively too.. */ if (commit->parents) mark_parents_uninteresting(commit); } /* * A missing commit is ok iff its parent is marked * uninteresting. * * We just mark such a thing parsed, so that when * it is popped next time around, we won't be trying * to parse it and get an error. */ if (!has_sha1_file(commit->object.sha1)) commit->object.parsed = 1; parents = parents->next; } } static void add_pending_object_with_mode(struct rev_info *revs, struct object *obj, const char *name, unsigned mode) { if (revs->no_walk && (obj->flags & UNINTERESTING)) revs->no_walk = 0; if (revs->reflog_info && obj->type == OBJ_COMMIT) { struct strbuf buf = STRBUF_INIT; int len = interpret_branch_name(name, &buf); int st; if (0 < len && name[len] && buf.len) strbuf_addstr(&buf, name + len); st = add_reflog_for_walk(revs->reflog_info, (struct commit *)obj, buf.buf[0] ? buf.buf: name); strbuf_release(&buf); if (st) return; } add_object_array_with_mode(obj, name, &revs->pending, mode); } void add_pending_object(struct rev_info *revs, struct object *obj, const char *name) { add_pending_object_with_mode(revs, obj, name, S_IFINVALID); } void add_head_to_pending(struct rev_info *revs) { unsigned char sha1[20]; struct object *obj; if (get_sha1("HEAD", sha1)) return; obj = parse_object(sha1); if (!obj) return; add_pending_object(revs, obj, "HEAD"); } static struct object *get_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags) { struct object *object; object = parse_object(sha1); if (!object) die("bad object %s", name); object->flags |= flags; return object; } static struct commit *handle_commit(struct rev_info *revs, struct object *object, const char *name) { unsigned long flags = object->flags; /* * Tag object? Look what it points to.. */ while (object->type == OBJ_TAG) { struct tag *tag = (struct tag *) object; if (revs->tag_objects && !(flags & UNINTERESTING)) add_pending_object(revs, object, tag->tag); if (!tag->tagged) die("bad tag"); object = parse_object(tag->tagged->sha1); if (!object) { if (flags & UNINTERESTING) return NULL; die("bad object %s", sha1_to_hex(tag->tagged->sha1)); } } /* * Commit object? Just return it, we'll do all the complex * reachability crud. */ if (object->type == OBJ_COMMIT) { struct commit *commit = (struct commit *)object; if (parse_commit(commit) < 0) die("unable to parse commit %s", name); if (flags & UNINTERESTING) { commit->object.flags |= UNINTERESTING; mark_parents_uninteresting(commit); revs->limited = 1; } if (revs->show_source && !commit->util) commit->util = (void *) name; return commit; } /* * Tree object? Either mark it uninteresting, or add it * to the list of objects to look at later.. */ if (object->type == OBJ_TREE) { struct tree *tree = (struct tree *)object; if (!revs->tree_objects) return NULL; if (flags & UNINTERESTING) { mark_tree_uninteresting(tree); return NULL; } add_pending_object(revs, object, ""); return NULL; } /* * Blob object? You know the drill by now.. */ if (object->type == OBJ_BLOB) { struct blob *blob = (struct blob *)object; if (!revs->blob_objects) return NULL; if (flags & UNINTERESTING) { mark_blob_uninteresting(blob); return NULL; } add_pending_object(revs, object, ""); return NULL; } die("%s is unknown object", name); } static int everybody_uninteresting(struct commit_list *orig) { struct commit_list *list = orig; while (list) { struct commit *commit = list->item; list = list->next; if (commit->object.flags & UNINTERESTING) continue; return 0; } return 1; } /* * The goal is to get REV_TREE_NEW as the result only if the * diff consists of all '+' (and no other changes), REV_TREE_OLD * if the whole diff is removal of old data, and otherwise * REV_TREE_DIFFERENT (of course if the trees are the same we * want REV_TREE_SAME). * That means that once we get to REV_TREE_DIFFERENT, we do not * have to look any further. */ static int tree_difference = REV_TREE_SAME; static void file_add_remove(struct diff_options *options, int addremove, unsigned mode, const unsigned char *sha1, const char *fullpath, unsigned dirty_submodule) { int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD; tree_difference |= diff; if (tree_difference == REV_TREE_DIFFERENT) DIFF_OPT_SET(options, HAS_CHANGES); } static void file_change(struct diff_options *options, unsigned old_mode, unsigned new_mode, const unsigned char *old_sha1, const unsigned char *new_sha1, const char *fullpath, unsigned old_dirty_submodule, unsigned new_dirty_submodule) { tree_difference = REV_TREE_DIFFERENT; DIFF_OPT_SET(options, HAS_CHANGES); } static int rev_compare_tree(struct rev_info *revs, struct commit *parent, struct commit *commit) { struct tree *t1 = parent->tree; struct tree *t2 = commit->tree; if (!t1) return REV_TREE_NEW; if (!t2) return REV_TREE_OLD; if (revs->simplify_by_decoration) { /* * If we are simplifying by decoration, then the commit * is worth showing if it has a tag pointing at it. */ if (lookup_decoration(&name_decoration, &commit->object)) return REV_TREE_DIFFERENT; /* * A commit that is not pointed by a tag is uninteresting * if we are not limited by path. This means that you will * see the usual "commits that touch the paths" plus any * tagged commit by specifying both --simplify-by-decoration * and pathspec. */ if (!revs->prune_data) return REV_TREE_SAME; } tree_difference = REV_TREE_SAME; DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES); if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &revs->pruning) < 0) return REV_TREE_DIFFERENT; return tree_difference; } static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit) { int retval; void *tree; unsigned long size; struct tree_desc empty, real; struct tree *t1 = commit->tree; if (!t1) return 0; tree = read_object_with_reference(t1->object.sha1, tree_type, &size, NULL); if (!tree) return 0; init_tree_desc(&real, tree, size); init_tree_desc(&empty, "", 0); tree_difference = REV_TREE_SAME; DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES); retval = diff_tree(&empty, &real, "", &revs->pruning); free(tree); return retval >= 0 && (tree_difference == REV_TREE_SAME); } static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit) { struct commit_list **pp, *parent; int tree_changed = 0, tree_same = 0; /* * If we don't do pruning, everything is interesting */ if (!revs->prune) return; if (!commit->tree) return; if (!commit->parents) { if (rev_same_tree_as_empty(revs, commit)) commit->object.flags |= TREESAME; return; } /* * Normal non-merge commit? If we don't want to make the * history dense, we consider it always to be a change.. */ if (!revs->dense && !commit->parents->next) return; pp = &commit->parents; while ((parent = *pp) != NULL) { struct commit *p = parent->item; if (parse_commit(p) < 0) die("cannot simplify commit %s (because of %s)", sha1_to_hex(commit->object.sha1), sha1_to_hex(p->object.sha1)); switch (rev_compare_tree(revs, p, commit)) { case REV_TREE_SAME: tree_same = 1; if (!revs->simplify_history || (p->object.flags & UNINTERESTING)) { /* Even if a merge with an uninteresting * side branch brought the entire change * we are interested in, we do not want * to lose the other branches of this * merge, so we just keep going. */ pp = &parent->next; continue; } parent->next = NULL; commit->parents = parent; commit->object.flags |= TREESAME; return; case REV_TREE_NEW: if (revs->remove_empty_trees && rev_same_tree_as_empty(revs, p)) { /* We are adding all the specified * paths from this parent, so the * history beyond this parent is not * interesting. Remove its parents * (they are grandparents for us). * IOW, we pretend this parent is a * "root" commit. */ if (parse_commit(p) < 0) die("cannot simplify commit %s (invalid %s)", sha1_to_hex(commit->object.sha1), sha1_to_hex(p->object.sha1)); p->parents = NULL; } /* fallthrough */ case REV_TREE_OLD: case REV_TREE_DIFFERENT: tree_changed = 1; pp = &parent->next; continue; } die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1)); } if (tree_changed && !tree_same) return; commit->object.flags |= TREESAME; } static void insert_by_date_cached(struct commit *p, struct commit_list **head, struct commit_list *cached_base, struct commit_list **cache) { struct commit_list *new_entry; if (cached_base && p->date < cached_base->item->date) new_entry = insert_by_date(p, &cached_base->next); else new_entry = insert_by_date(p, head); if (cache && (!*cache || p->date < (*cache)->item->date)) *cache = new_entry; } static int add_parents_to_list(struct rev_info *revs, struct commit *commit, struct commit_list **list, struct commit_list **cache_ptr) { struct commit_list *parent = commit->parents; unsigned left_flag; struct commit_list *cached_base = cache_ptr ? *cache_ptr : NULL; if (commit->object.flags & ADDED) return 0; commit->object.flags |= ADDED; /* * If the commit is uninteresting, don't try to * prune parents - we want the maximal uninteresting * set. * * Normally we haven't parsed the parent * yet, so we won't have a parent of a parent * here. However, it may turn out that we've * reached this commit some other way (where it * wasn't uninteresting), in which case we need * to mark its parents recursively too.. */ if (commit->object.flags & UNINTERESTING) { while (parent) { struct commit *p = parent->item; parent = parent->next; if (p) p->object.flags |= UNINTERESTING; if (parse_commit(p) < 0) continue; if (p->parents) mark_parents_uninteresting(p); if (p->object.flags & SEEN) continue; p->object.flags |= SEEN; insert_by_date_cached(p, list, cached_base, cache_ptr); } return 0; } /* * Ok, the commit wasn't uninteresting. Try to * simplify the commit history and find the parent * that has no differences in the path set if one exists. */ try_to_simplify_commit(revs, commit); if (revs->no_walk) return 0; left_flag = (commit->object.flags & SYMMETRIC_LEFT); for (parent = commit->parents; parent; parent = parent->next) { struct commit *p = parent->item; if (parse_commit(p) < 0) return -1; if (revs->show_source && !p->util) p->util = commit->util; p->object.flags |= left_flag; if (!(p->object.flags & SEEN)) { p->object.flags |= SEEN; insert_by_date_cached(p, list, cached_base, cache_ptr); } if (revs->first_parent_only) break; } return 0; } static void cherry_pick_list(struct commit_list *list, struct rev_info *revs) { struct commit_list *p; int left_count = 0, right_count = 0; int left_first; struct patch_ids ids; /* First count the commits on the left and on the right */ for (p = list; p; p = p->next) { struct commit *commit = p->item; unsigned flags = commit->object.flags; if (flags & BOUNDARY) ; else if (flags & SYMMETRIC_LEFT) left_count++; else right_count++; } if (!left_count || !right_count) return; left_first = left_count < right_count; init_patch_ids(&ids); if (revs->diffopt.nr_paths) { ids.diffopts.nr_paths = revs->diffopt.nr_paths; ids.diffopts.paths = revs->diffopt.paths; ids.diffopts.pathlens = revs->diffopt.pathlens; } /* Compute patch-ids for one side */ for (p = list; p; p = p->next) { struct commit *commit = p->item; unsigned flags = commit->object.flags; if (flags & BOUNDARY) continue; /* * If we have fewer left, left_first is set and we omit * commits on the right branch in this loop. If we have * fewer right, we skip the left ones. */ if (left_first != !!(flags & SYMMETRIC_LEFT)) continue; commit->util = add_commit_patch_id(commit, &ids); } /* Check the other side */ for (p = list; p; p = p->next) { struct commit *commit = p->item; struct patch_id *id; unsigned flags = commit->object.flags; if (flags & BOUNDARY) continue; /* * If we have fewer left, left_first is set and we omit * commits on the left branch in this loop. */ if (left_first == !!(flags & SYMMETRIC_LEFT)) continue; /* * Have we seen the same patch id? */ id = has_commit_patch_id(commit, &ids); if (!id) continue; id->seen = 1; commit->object.flags |= SHOWN; } /* Now check the original side for seen ones */ for (p = list; p; p = p->next) { struct commit *commit = p->item; struct patch_id *ent; ent = commit->util; if (!ent) continue; if (ent->seen) commit->object.flags |= SHOWN; commit->util = NULL; } free_patch_ids(&ids); } /* How many extra uninteresting commits we want to see.. */ #define SLOP 5 static int still_interesting(struct commit_list *src, unsigned long date, int slop) { /* * No source list at all? We're definitely done.. */ if (!src) return 0; /* * Does the destination list contain entries with a date * before the source list? Definitely _not_ done. */ if (date < src->item->date) return SLOP; /* * Does the source list still have interesting commits in * it? Definitely not done.. */ if (!everybody_uninteresting(src)) return SLOP; /* Ok, we're closing in.. */ return slop-1; } /* * "rev-list --ancestry-path A..B" computes commits that are ancestors * of B but not ancestors of A but further limits the result to those * that are descendants of A. This takes the list of bottom commits and * the result of "A..B" without --ancestry-path, and limits the latter * further to the ones that can reach one of the commits in "bottom". */ static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *list) { struct commit_list *p; struct commit_list *rlist = NULL; int made_progress; /* * Reverse the list so that it will be likely that we would * process parents before children. */ for (p = list; p; p = p->next) commit_list_insert(p->item, &rlist); for (p = bottom; p; p = p->next) p->item->object.flags |= TMP_MARK; /* * Mark the ones that can reach bottom commits in "list", * in a bottom-up fashion. */ do { made_progress = 0; for (p = rlist; p; p = p->next) { struct commit *c = p->item; struct commit_list *parents; if (c->object.flags & (TMP_MARK | UNINTERESTING)) continue; for (parents = c->parents; parents; parents = parents->next) { if (!(parents->item->object.flags & TMP_MARK)) continue; c->object.flags |= TMP_MARK; made_progress = 1; break; } } } while (made_progress); /* * NEEDSWORK: decide if we want to remove parents that are * not marked with TMP_MARK from commit->parents for commits * in the resulting list. We may not want to do that, though. */ /* * The ones that are not marked with TMP_MARK are uninteresting */ for (p = list; p; p = p->next) { struct commit *c = p->item; if (c->object.flags & TMP_MARK) continue; c->object.flags |= UNINTERESTING; } /* We are done with the TMP_MARK */ for (p = list; p; p = p->next) p->item->object.flags &= ~TMP_MARK; for (p = bottom; p; p = p->next) p->item->object.flags &= ~TMP_MARK; free_commit_list(rlist); } /* * Before walking the history, keep the set of "negative" refs the * caller has asked to exclude. * * This is used to compute "rev-list --ancestry-path A..B", as we need * to filter the result of "A..B" further to the ones that can actually * reach A. */ static struct commit_list *collect_bottom_commits(struct rev_info *revs) { struct commit_list *bottom = NULL; int i; for (i = 0; i < revs->cmdline.nr; i++) { struct rev_cmdline_entry *elem = &revs->cmdline.rev[i]; if ((elem->flags & UNINTERESTING) && elem->item->type == OBJ_COMMIT) commit_list_insert((struct commit *)elem->item, &bottom); } return bottom; } static int limit_list(struct rev_info *revs) { int slop = SLOP; unsigned long date = ~0ul; struct commit_list *list = revs->commits; struct commit_list *newlist = NULL; struct commit_list **p = &newlist; struct commit_list *bottom = NULL; if (revs->ancestry_path) { bottom = collect_bottom_commits(revs); if (!bottom) die("--ancestry-path given but there are no bottom commits"); } while (list) { struct commit_list *entry = list; struct commit *commit = list->item; struct object *obj = &commit->object; show_early_output_fn_t show; list = list->next; free(entry); if (revs->max_age != -1 && (commit->date < revs->max_age)) obj->flags |= UNINTERESTING; if (add_parents_to_list(revs, commit, &list, NULL) < 0) return -1; if (obj->flags & UNINTERESTING) { mark_parents_uninteresting(commit); if (revs->show_all) p = &commit_list_insert(commit, p)->next; slop = still_interesting(list, date, slop); if (slop) continue; /* If showing all, add the whole pending list to the end */ if (revs->show_all) *p = list; break; } if (revs->min_age != -1 && (commit->date > revs->min_age)) continue; date = commit->date; p = &commit_list_insert(commit, p)->next; show = show_early_output; if (!show) continue; show(revs, newlist); show_early_output = NULL; } if (revs->cherry_pick) cherry_pick_list(newlist, revs); if (bottom) { limit_to_ancestry(bottom, newlist); free_commit_list(bottom); } revs->commits = newlist; return 0; } static void add_rev_cmdline(struct rev_info *revs, struct object *item, const char *name, int whence, unsigned flags) { struct rev_cmdline_info *info = &revs->cmdline; int nr = info->nr; ALLOC_GROW(info->rev, nr + 1, info->alloc); info->rev[nr].item = item; info->rev[nr].name = name; info->rev[nr].whence = whence; info->rev[nr].flags = flags; info->nr++; } struct all_refs_cb { int all_flags; int warned_bad_reflog; struct rev_info *all_revs; const char *name_for_errormsg; }; static int handle_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data) { struct all_refs_cb *cb = cb_data; struct object *object = get_reference(cb->all_revs, path, sha1, cb->all_flags); add_rev_cmdline(cb->all_revs, object, path, REV_CMD_REF, cb->all_flags); add_pending_object(cb->all_revs, object, path); return 0; } static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs, unsigned flags) { cb->all_revs = revs; cb->all_flags = flags; } static void handle_refs(struct rev_info *revs, unsigned flags, int (*for_each)(each_ref_fn, void *)) { struct all_refs_cb cb; init_all_refs_cb(&cb, revs, flags); for_each(handle_one_ref, &cb); } static void handle_one_reflog_commit(unsigned char *sha1, void *cb_data) { struct all_refs_cb *cb = cb_data; if (!is_null_sha1(sha1)) { struct object *o = parse_object(sha1); if (o) { o->flags |= cb->all_flags; /* ??? CMDLINEFLAGS ??? */ add_pending_object(cb->all_revs, o, ""); } else if (!cb->warned_bad_reflog) { warning("reflog of '%s' references pruned commits", cb->name_for_errormsg); cb->warned_bad_reflog = 1; } } } static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, const char *email, unsigned long timestamp, int tz, const char *message, void *cb_data) { handle_one_reflog_commit(osha1, cb_data); handle_one_reflog_commit(nsha1, cb_data); return 0; } static int handle_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data) { struct all_refs_cb *cb = cb_data; cb->warned_bad_reflog = 0; cb->name_for_errormsg = path; for_each_reflog_ent(path, handle_one_reflog_ent, cb_data); return 0; } static void handle_reflog(struct rev_info *revs, unsigned flags) { struct all_refs_cb cb; cb.all_revs = revs; cb.all_flags = flags; for_each_reflog(handle_one_reflog, &cb); } static int add_parents_only(struct rev_info *revs, const char *arg_, int flags) { unsigned char sha1[20]; struct object *it; struct commit *commit; struct commit_list *parents; const char *arg = arg_; if (*arg == '^') { flags ^= UNINTERESTING; arg++; } if (get_sha1(arg, sha1)) return 0; while (1) { it = get_reference(revs, arg, sha1, 0); if (it->type != OBJ_TAG) break; if (!((struct tag*)it)->tagged) return 0; hashcpy(sha1, ((struct tag*)it)->tagged->sha1); } if (it->type != OBJ_COMMIT) return 0; commit = (struct commit *)it; for (parents = commit->parents; parents; parents = parents->next) { it = &parents->item->object; it->flags |= flags; add_rev_cmdline(revs, it, arg_, REV_CMD_PARENTS_ONLY, flags); add_pending_object(revs, it, arg); } return 1; } void init_revisions(struct rev_info *revs, const char *prefix) { memset(revs, 0, sizeof(*revs)); revs->abbrev = DEFAULT_ABBREV; revs->ignore_merges = 1; revs->simplify_history = 1; DIFF_OPT_SET(&revs->pruning, RECURSIVE); DIFF_OPT_SET(&revs->pruning, QUICK); revs->pruning.add_remove = file_add_remove; revs->pruning.change = file_change; revs->lifo = 1; revs->dense = 1; revs->prefix = prefix; revs->max_age = -1; revs->min_age = -1; revs->skip_count = -1; revs->max_count = -1; revs->commit_format = CMIT_FMT_DEFAULT; revs->grep_filter.status_only = 1; revs->grep_filter.pattern_tail = &(revs->grep_filter.pattern_list); revs->grep_filter.header_tail = &(revs->grep_filter.header_list); revs->grep_filter.regflags = REG_NEWLINE; diff_setup(&revs->diffopt); if (prefix && !revs->diffopt.prefix) { revs->diffopt.prefix = prefix; revs->diffopt.prefix_length = strlen(prefix); } } static void add_pending_commit_list(struct rev_info *revs, struct commit_list *commit_list, unsigned int flags) { while (commit_list) { struct object *object = &commit_list->item->object; object->flags |= flags; add_pending_object(revs, object, sha1_to_hex(object->sha1)); commit_list = commit_list->next; } } static void prepare_show_merge(struct rev_info *revs) { struct commit_list *bases; struct commit *head, *other; unsigned char sha1[20]; const char **prune = NULL; int i, prune_num = 1; /* counting terminating NULL */ if (get_sha1("HEAD", sha1) || !(head = lookup_commit(sha1))) die("--merge without HEAD?"); if (get_sha1("MERGE_HEAD", sha1) || !(other = lookup_commit(sha1))) die("--merge without MERGE_HEAD?"); add_pending_object(revs, &head->object, "HEAD"); add_pending_object(revs, &other->object, "MERGE_HEAD"); bases = get_merge_bases(head, other, 1); add_pending_commit_list(revs, bases, UNINTERESTING); free_commit_list(bases); head->object.flags |= SYMMETRIC_LEFT; if (!active_nr) read_cache(); for (i = 0; i < active_nr; i++) { struct cache_entry *ce = active_cache[i]; if (!ce_stage(ce)) continue; if (ce_path_match(ce, revs->prune_data)) { prune_num++; prune = xrealloc(prune, sizeof(*prune) * prune_num); prune[prune_num-2] = ce->name; prune[prune_num-1] = NULL; } while ((i+1 < active_nr) && ce_same_name(ce, active_cache[i+1])) i++; } revs->prune_data = prune; revs->limited = 1; } int handle_revision_arg(const char *arg_, struct rev_info *revs, int flags, int cant_be_filename) { unsigned mode; char *dotdot; struct object *object; unsigned char sha1[20]; int local_flags; const char *arg = arg_; dotdot = strstr(arg, ".."); if (dotdot) { unsigned char from_sha1[20]; const char *next = dotdot + 2; const char *this = arg; int symmetric = *next == '.'; unsigned int flags_exclude = flags ^ UNINTERESTING; unsigned int a_flags; *dotdot = 0; next += symmetric; if (!*next) next = "HEAD"; if (dotdot == arg) this = "HEAD"; if (!get_sha1(this, from_sha1) && !get_sha1(next, sha1)) { struct commit *a, *b; struct commit_list *exclude; a = lookup_commit_reference(from_sha1); b = lookup_commit_reference(sha1); if (!a || !b) { die(symmetric ? "Invalid symmetric difference expression %s...%s" : "Invalid revision range %s..%s", arg, next); } if (!cant_be_filename) { *dotdot = '.'; verify_non_filename(revs->prefix, arg); } if (symmetric) { exclude = get_merge_bases(a, b, 1); add_pending_commit_list(revs, exclude, flags_exclude); free_commit_list(exclude); a_flags = flags | SYMMETRIC_LEFT; } else a_flags = flags_exclude; a->object.flags |= a_flags; b->object.flags |= flags; add_rev_cmdline(revs, &a->object, this, REV_CMD_LEFT, a_flags); add_rev_cmdline(revs, &b->object, next, REV_CMD_RIGHT, flags); add_pending_object(revs, &a->object, this); add_pending_object(revs, &b->object, next); return 0; } *dotdot = '.'; } dotdot = strstr(arg, "^@"); if (dotdot && !dotdot[2]) { *dotdot = 0; if (add_parents_only(revs, arg, flags)) return 0; *dotdot = '^'; } dotdot = strstr(arg, "^!"); if (dotdot && !dotdot[2]) { *dotdot = 0; if (!add_parents_only(revs, arg, flags ^ UNINTERESTING)) *dotdot = '^'; } local_flags = 0; if (*arg == '^') { local_flags = UNINTERESTING; arg++; } if (get_sha1_with_mode(arg, sha1, &mode)) return -1; if (!cant_be_filename) verify_non_filename(revs->prefix, arg); object = get_reference(revs, arg, sha1, flags ^ local_flags); add_rev_cmdline(revs, object, arg_, REV_CMD_REV, flags ^ local_flags); add_pending_object_with_mode(revs, object, arg, mode); return 0; } static void read_pathspec_from_stdin(struct rev_info *revs, struct strbuf *sb, const char ***prune_data) { const char **prune = *prune_data; int prune_nr; int prune_alloc; /* count existing ones */ if (!prune) prune_nr = 0; else for (prune_nr = 0; prune[prune_nr]; prune_nr++) ; prune_alloc = prune_nr; /* not really, but we do not know */ while (strbuf_getwholeline(sb, stdin, '\n') != EOF) { int len = sb->len; if (len && sb->buf[len - 1] == '\n') sb->buf[--len] = '\0'; ALLOC_GROW(prune, prune_nr+1, prune_alloc); prune[prune_nr++] = xstrdup(sb->buf); } if (prune) { ALLOC_GROW(prune, prune_nr+1, prune_alloc); prune[prune_nr] = NULL; } *prune_data = prune; } static void read_revisions_from_stdin(struct rev_info *revs, const char ***prune) { struct strbuf sb; int seen_dashdash = 0; strbuf_init(&sb, 1000); while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) { int len = sb.len; if (len && sb.buf[len - 1] == '\n') sb.buf[--len] = '\0'; if (!len) break; if (sb.buf[0] == '-') { if (len == 2 && sb.buf[1] == '-') { seen_dashdash = 1; break; } die("options not supported in --stdin mode"); } if (handle_revision_arg(sb.buf, revs, 0, 1)) die("bad revision '%s'", sb.buf); } if (seen_dashdash) read_pathspec_from_stdin(revs, &sb, prune); strbuf_release(&sb); } static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what) { append_grep_pattern(&revs->grep_filter, ptn, "command line", 0, what); } static void add_header_grep(struct rev_info *revs, enum grep_header_field field, const char *pattern) { append_header_grep_pattern(&revs->grep_filter, field, pattern); } static void add_message_grep(struct rev_info *revs, const char *pattern) { add_grep(revs, pattern, GREP_PATTERN_BODY); } static int handle_revision_opt(struct rev_info *revs, int argc, const char **argv, int *unkc, const char **unkv) { const char *arg = argv[0]; /* pseudo revision arguments */ if (!strcmp(arg, "--all") || !strcmp(arg, "--branches") || !strcmp(arg, "--tags") || !strcmp(arg, "--remotes") || !strcmp(arg, "--reflog") || !strcmp(arg, "--not") || !strcmp(arg, "--no-walk") || !strcmp(arg, "--do-walk") || !strcmp(arg, "--bisect")) { unkv[(*unkc)++] = arg; return 1; } if (!prefixcmp(arg, "--max-count=")) { revs->max_count = atoi(arg + 12); } else if (!prefixcmp(arg, "--skip=")) { revs->skip_count = atoi(arg + 7); } else if ((*arg == '-') && isdigit(arg[1])) { /* accept -, like traditional "head" */ revs->max_count = atoi(arg + 1); } else if (!strcmp(arg, "-n")) { if (argc <= 1) return error("-n requires an argument"); revs->max_count = atoi(argv[1]); return 2; } else if (!prefixcmp(arg, "-n")) { revs->max_count = atoi(arg + 2); } else if (!prefixcmp(arg, "--max-age=")) { revs->max_age = atoi(arg + 10); } else if (!prefixcmp(arg, "--since=")) { revs->max_age = approxidate(arg + 8); } else if (!prefixcmp(arg, "--after=")) { revs->max_age = approxidate(arg + 8); } else if (!prefixcmp(arg, "--min-age=")) { revs->min_age = atoi(arg + 10); } else if (!prefixcmp(arg, "--before=")) { revs->min_age = approxidate(arg + 9); } else if (!prefixcmp(arg, "--until=")) { revs->min_age = approxidate(arg + 8); } else if (!strcmp(arg, "--first-parent")) { revs->first_parent_only = 1; } else if (!strcmp(arg, "--ancestry-path")) { revs->ancestry_path = 1; revs->simplify_history = 0; revs->limited = 1; } else if (!strcmp(arg, "-g") || !strcmp(arg, "--walk-reflogs")) { init_reflog_walk(&revs->reflog_info); } else if (!strcmp(arg, "--default")) { if (argc <= 1) return error("bad --default argument"); revs->def = argv[1]; return 2; } else if (!strcmp(arg, "--merge")) { revs->show_merge = 1; } else if (!strcmp(arg, "--topo-order")) { revs->lifo = 1; revs->topo_order = 1; } else if (!strcmp(arg, "--simplify-merges")) { revs->simplify_merges = 1; revs->rewrite_parents = 1; revs->simplify_history = 0; revs->limited = 1; } else if (!strcmp(arg, "--simplify-by-decoration")) { revs->simplify_merges = 1; revs->rewrite_parents = 1; revs->simplify_history = 0; revs->simplify_by_decoration = 1; revs->limited = 1; revs->prune = 1; load_ref_decorations(DECORATE_SHORT_REFS); } else if (!strcmp(arg, "--date-order")) { revs->lifo = 0; revs->topo_order = 1; } else if (!prefixcmp(arg, "--early-output")) { int count = 100; switch (arg[14]) { case '=': count = atoi(arg+15); /* Fallthrough */ case 0: revs->topo_order = 1; revs->early_output = count; } } else if (!strcmp(arg, "--parents")) { revs->rewrite_parents = 1; revs->print_parents = 1; } else if (!strcmp(arg, "--dense")) { revs->dense = 1; } else if (!strcmp(arg, "--sparse")) { revs->dense = 0; } else if (!strcmp(arg, "--show-all")) { revs->show_all = 1; } else if (!strcmp(arg, "--remove-empty")) { revs->remove_empty_trees = 1; } else if (!strcmp(arg, "--merges")) { revs->merges_only = 1; } else if (!strcmp(arg, "--no-merges")) { revs->no_merges = 1; } else if (!strcmp(arg, "--boundary")) { revs->boundary = 1; } else if (!strcmp(arg, "--left-right")) { revs->left_right = 1; } else if (!strcmp(arg, "--cherry-pick")) { revs->cherry_pick = 1; revs->limited = 1; } else if (!strcmp(arg, "--objects")) { revs->tag_objects = 1; revs->tree_objects = 1; revs->blob_objects = 1; } else if (!strcmp(arg, "--objects-edge")) { revs->tag_objects = 1; revs->tree_objects = 1; revs->blob_objects = 1; revs->edge_hint = 1; } else if (!strcmp(arg, "--unpacked")) { revs->unpacked = 1; } else if (!prefixcmp(arg, "--unpacked=")) { die("--unpacked= no longer supported."); } else if (!strcmp(arg, "-r")) { revs->diff = 1; DIFF_OPT_SET(&revs->diffopt, RECURSIVE); } else if (!strcmp(arg, "-t")) { revs->diff = 1; DIFF_OPT_SET(&revs->diffopt, RECURSIVE); DIFF_OPT_SET(&revs->diffopt, TREE_IN_RECURSIVE); } else if (!strcmp(arg, "-m")) { revs->ignore_merges = 0; } else if (!strcmp(arg, "-c")) { revs->diff = 1; revs->dense_combined_merges = 0; revs->combine_merges = 1; } else if (!strcmp(arg, "--cc")) { revs->diff = 1; revs->dense_combined_merges = 1; revs->combine_merges = 1; } else if (!strcmp(arg, "-v")) { revs->verbose_header = 1; } else if (!strcmp(arg, "--pretty")) { revs->verbose_header = 1; revs->pretty_given = 1; get_commit_format(arg+8, revs); } else if (!prefixcmp(arg, "--pretty=") || !prefixcmp(arg, "--format=")) { revs->verbose_header = 1; revs->pretty_given = 1; get_commit_format(arg+9, revs); } else if (!strcmp(arg, "--show-notes")) { revs->show_notes = 1; revs->show_notes_given = 1; } else if (!prefixcmp(arg, "--show-notes=")) { struct strbuf buf = STRBUF_INIT; revs->show_notes = 1; revs->show_notes_given = 1; if (!revs->notes_opt.extra_notes_refs) revs->notes_opt.extra_notes_refs = xcalloc(1, sizeof(struct string_list)); if (!prefixcmp(arg+13, "refs/")) /* happy */; else if (!prefixcmp(arg+13, "notes/")) strbuf_addstr(&buf, "refs/"); else strbuf_addstr(&buf, "refs/notes/"); strbuf_addstr(&buf, arg+13); string_list_append(strbuf_detach(&buf, NULL), revs->notes_opt.extra_notes_refs); } else if (!strcmp(arg, "--no-notes")) { revs->show_notes = 0; revs->show_notes_given = 1; } else if (!strcmp(arg, "--standard-notes")) { revs->show_notes_given = 1; revs->notes_opt.suppress_default_notes = 0; } else if (!strcmp(arg, "--no-standard-notes")) { revs->notes_opt.suppress_default_notes = 1; } else if (!strcmp(arg, "--oneline")) { revs->verbose_header = 1; get_commit_format("oneline", revs); revs->pretty_given = 1; revs->abbrev_commit = 1; } else if (!strcmp(arg, "--graph")) { revs->topo_order = 1; revs->rewrite_parents = 1; revs->graph = graph_init(revs); } else if (!strcmp(arg, "--root")) { revs->show_root_diff = 1; } else if (!strcmp(arg, "--no-commit-id")) { revs->no_commit_id = 1; } else if (!strcmp(arg, "--always")) { revs->always_show_header = 1; } else if (!strcmp(arg, "--no-abbrev")) { revs->abbrev = 0; } else if (!strcmp(arg, "--abbrev")) { revs->abbrev = DEFAULT_ABBREV; } else if (!prefixcmp(arg, "--abbrev=")) { revs->abbrev = strtoul(arg + 9, NULL, 10); if (revs->abbrev < MINIMUM_ABBREV) revs->abbrev = MINIMUM_ABBREV; else if (revs->abbrev > 40) revs->abbrev = 40; } else if (!strcmp(arg, "--abbrev-commit")) { revs->abbrev_commit = 1; } else if (!strcmp(arg, "--full-diff")) { revs->diff = 1; revs->full_diff = 1; } else if (!strcmp(arg, "--full-history")) { revs->simplify_history = 0; } else if (!strcmp(arg, "--relative-date")) { revs->date_mode = DATE_RELATIVE; revs->date_mode_explicit = 1; } else if (!strncmp(arg, "--date=", 7)) { revs->date_mode = parse_date_format(arg + 7); revs->date_mode_explicit = 1; } else if (!strcmp(arg, "--log-size")) { revs->show_log_size = 1; } /* * Grepping the commit log */ else if (!prefixcmp(arg, "--author=")) { add_header_grep(revs, GREP_HEADER_AUTHOR, arg+9); } else if (!prefixcmp(arg, "--committer=")) { add_header_grep(revs, GREP_HEADER_COMMITTER, arg+12); } else if (!prefixcmp(arg, "--grep=")) { add_message_grep(revs, arg+7); } else if (!strcmp(arg, "--extended-regexp") || !strcmp(arg, "-E")) { revs->grep_filter.regflags |= REG_EXTENDED; } else if (!strcmp(arg, "--regexp-ignore-case") || !strcmp(arg, "-i")) { revs->grep_filter.regflags |= REG_ICASE; } else if (!strcmp(arg, "--fixed-strings") || !strcmp(arg, "-F")) { revs->grep_filter.fixed = 1; } else if (!strcmp(arg, "--all-match")) { revs->grep_filter.all_match = 1; } else if (!prefixcmp(arg, "--encoding=")) { arg += 11; if (strcmp(arg, "none")) git_log_output_encoding = xstrdup(arg); else git_log_output_encoding = ""; } else if (!strcmp(arg, "--reverse")) { revs->reverse ^= 1; } else if (!strcmp(arg, "--children")) { revs->children.name = "children"; revs->limited = 1; } else { int opts = diff_opt_parse(&revs->diffopt, argv, argc); if (!opts) unkv[(*unkc)++] = arg; return opts; } return 1; } void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx, const struct option *options, const char * const usagestr[]) { int n = handle_revision_opt(revs, ctx->argc, ctx->argv, &ctx->cpidx, ctx->out); if (n <= 0) { error("unknown option `%s'", ctx->argv[0]); usage_with_options(usagestr, options); } ctx->argv += n; ctx->argc -= n; } static int for_each_bad_bisect_ref(each_ref_fn fn, void *cb_data) { return for_each_ref_in("refs/bisect/bad", fn, cb_data); } static int for_each_good_bisect_ref(each_ref_fn fn, void *cb_data) { return for_each_ref_in("refs/bisect/good", fn, cb_data); } static void append_prune_data(const char ***prune_data, const char **av) { const char **prune = *prune_data; int prune_nr; int prune_alloc; if (!prune) { *prune_data = av; return; } /* count existing ones */ for (prune_nr = 0; prune[prune_nr]; prune_nr++) ; prune_alloc = prune_nr; /* not really, but we do not know */ while (*av) { ALLOC_GROW(prune, prune_nr+1, prune_alloc); prune[prune_nr++] = *av; av++; } if (prune) { ALLOC_GROW(prune, prune_nr+1, prune_alloc); prune[prune_nr] = NULL; } *prune_data = prune; } /* * Parse revision information, filling in the "rev_info" structure, * and removing the used arguments from the argument list. * * Returns the number of arguments left that weren't recognized * (which are also moved to the head of the argument list) */ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct setup_revision_opt *opt) { int i, flags, left, seen_dashdash, read_from_stdin, got_rev_arg = 0; const char **prune_data = NULL; /* First, search for "--" */ seen_dashdash = 0; for (i = 1; i < argc; i++) { const char *arg = argv[i]; if (strcmp(arg, "--")) continue; argv[i] = NULL; argc = i; if (argv[i + 1]) prune_data = argv + i + 1; seen_dashdash = 1; break; } /* Second, deal with arguments and options */ flags = 0; read_from_stdin = 0; for (left = i = 1; i < argc; i++) { const char *arg = argv[i]; if (*arg == '-') { int opts; if (!strcmp(arg, "--all")) { handle_refs(revs, flags, for_each_ref); handle_refs(revs, flags, head_ref); continue; } if (!strcmp(arg, "--branches")) { handle_refs(revs, flags, for_each_branch_ref); continue; } if (!strcmp(arg, "--bisect")) { handle_refs(revs, flags, for_each_bad_bisect_ref); handle_refs(revs, flags ^ UNINTERESTING, for_each_good_bisect_ref); revs->bisect = 1; continue; } if (!strcmp(arg, "--tags")) { handle_refs(revs, flags, for_each_tag_ref); continue; } if (!strcmp(arg, "--remotes")) { handle_refs(revs, flags, for_each_remote_ref); continue; } if (!prefixcmp(arg, "--glob=")) { struct all_refs_cb cb; init_all_refs_cb(&cb, revs, flags); for_each_glob_ref(handle_one_ref, arg + 7, &cb); continue; } if (!prefixcmp(arg, "--branches=")) { struct all_refs_cb cb; init_all_refs_cb(&cb, revs, flags); for_each_glob_ref_in(handle_one_ref, arg + 11, "refs/heads/", &cb); continue; } if (!prefixcmp(arg, "--tags=")) { struct all_refs_cb cb; init_all_refs_cb(&cb, revs, flags); for_each_glob_ref_in(handle_one_ref, arg + 7, "refs/tags/", &cb); continue; } if (!prefixcmp(arg, "--remotes=")) { struct all_refs_cb cb; init_all_refs_cb(&cb, revs, flags); for_each_glob_ref_in(handle_one_ref, arg + 10, "refs/remotes/", &cb); continue; } if (!strcmp(arg, "--reflog")) { handle_reflog(revs, flags); continue; } if (!strcmp(arg, "--not")) { flags ^= UNINTERESTING; continue; } if (!strcmp(arg, "--no-walk")) { revs->no_walk = 1; continue; } if (!strcmp(arg, "--do-walk")) { revs->no_walk = 0; continue; } if (!strcmp(arg, "--stdin")) { if (revs->disable_stdin) { argv[left++] = arg; continue; } if (read_from_stdin++) die("--stdin given twice?"); read_revisions_from_stdin(revs, &prune_data); continue; } opts = handle_revision_opt(revs, argc - i, argv + i, &left, argv); if (opts > 0) { i += opts - 1; continue; } if (opts < 0) exit(128); continue; } if (handle_revision_arg(arg, revs, flags, seen_dashdash)) { int j; if (seen_dashdash || *arg == '^') die("bad revision '%s'", arg); /* If we didn't have a "--": * (1) all filenames must exist; * (2) all rev-args must not be interpretable * as a valid filename. * but the latter we have checked in the main loop. */ for (j = i; j < argc; j++) verify_filename(revs->prefix, argv[j]); append_prune_data(&prune_data, argv + i); break; } else got_rev_arg = 1; } if (prune_data) revs->prune_data = get_pathspec(revs->prefix, prune_data); if (revs->def == NULL) revs->def = opt ? opt->def : NULL; if (opt && opt->tweak) opt->tweak(revs, opt); if (revs->show_merge) prepare_show_merge(revs); if (revs->def && !revs->pending.nr && !got_rev_arg) { unsigned char sha1[20]; struct object *object; unsigned mode; if (get_sha1_with_mode(revs->def, sha1, &mode)) die("bad default revision '%s'", revs->def); object = get_reference(revs, revs->def, sha1, 0); add_pending_object_with_mode(revs, object, revs->def, mode); } /* Did the user ask for any diff output? Run the diff! */ if (revs->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) revs->diff = 1; /* Pickaxe, diff-filter and rename following need diffs */ if (revs->diffopt.pickaxe || revs->diffopt.filter || DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES)) revs->diff = 1; if (revs->topo_order) revs->limited = 1; if (revs->prune_data) { diff_tree_setup_paths(revs->prune_data, &revs->pruning); /* Can't prune commits with rename following: the paths change.. */ if (!DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES)) revs->prune = 1; if (!revs->full_diff) diff_tree_setup_paths(revs->prune_data, &revs->diffopt); } if (revs->combine_merges) revs->ignore_merges = 0; revs->diffopt.abbrev = revs->abbrev; if (diff_setup_done(&revs->diffopt) < 0) die("diff_setup_done failed"); compile_grep_patterns(&revs->grep_filter); if (revs->reverse && revs->reflog_info) die("cannot combine --reverse with --walk-reflogs"); if (revs->rewrite_parents && revs->children.name) die("cannot combine --parents and --children"); /* * Limitations on the graph functionality */ if (revs->reverse && revs->graph) die("cannot combine --reverse with --graph"); if (revs->reflog_info && revs->graph) die("cannot combine --walk-reflogs with --graph"); return left; } static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child) { struct commit_list *l = xcalloc(1, sizeof(*l)); l->item = child; l->next = add_decoration(&revs->children, &parent->object, l); } static int remove_duplicate_parents(struct commit *commit) { struct commit_list **pp, *p; int surviving_parents; /* Examine existing parents while marking ones we have seen... */ pp = &commit->parents; while ((p = *pp) != NULL) { struct commit *parent = p->item; if (parent->object.flags & TMP_MARK) { *pp = p->next; continue; } parent->object.flags |= TMP_MARK; pp = &p->next; } /* count them while clearing the temporary mark */ surviving_parents = 0; for (p = commit->parents; p; p = p->next) { p->item->object.flags &= ~TMP_MARK; surviving_parents++; } return surviving_parents; } struct merge_simplify_state { struct commit *simplified; }; static struct merge_simplify_state *locate_simplify_state(struct rev_info *revs, struct commit *commit) { struct merge_simplify_state *st; st = lookup_decoration(&revs->merge_simplification, &commit->object); if (!st) { st = xcalloc(1, sizeof(*st)); add_decoration(&revs->merge_simplification, &commit->object, st); } return st; } static struct commit_list **simplify_one(struct rev_info *revs, struct commit *commit, struct commit_list **tail) { struct commit_list *p; struct merge_simplify_state *st, *pst; int cnt; st = locate_simplify_state(revs, commit); /* * Have we handled this one? */ if (st->simplified) return tail; /* * An UNINTERESTING commit simplifies to itself, so does a * root commit. We do not rewrite parents of such commit * anyway. */ if ((commit->object.flags & UNINTERESTING) || !commit->parents) { st->simplified = commit; return tail; } /* * Do we know what commit all of our parents should be rewritten to? * Otherwise we are not ready to rewrite this one yet. */ for (cnt = 0, p = commit->parents; p; p = p->next) { pst = locate_simplify_state(revs, p->item); if (!pst->simplified) { tail = &commit_list_insert(p->item, tail)->next; cnt++; } } if (cnt) { tail = &commit_list_insert(commit, tail)->next; return tail; } /* * Rewrite our list of parents. */ for (p = commit->parents; p; p = p->next) { pst = locate_simplify_state(revs, p->item); p->item = pst->simplified; } cnt = remove_duplicate_parents(commit); /* * It is possible that we are a merge and one side branch * does not have any commit that touches the given paths; * in such a case, the immediate parents will be rewritten * to different commits. * * o----X X: the commit we are looking at; * / / o: a commit that touches the paths; * ---o----' * * Further reduce the parents by removing redundant parents. */ if (1 < cnt) { struct commit_list *h = reduce_heads(commit->parents); cnt = commit_list_count(h); free_commit_list(commit->parents); commit->parents = h; } /* * A commit simplifies to itself if it is a root, if it is * UNINTERESTING, if it touches the given paths, or if it is a * merge and its parents simplifies to more than one commits * (the first two cases are already handled at the beginning of * this function). * * Otherwise, it simplifies to what its sole parent simplifies to. */ if (!cnt || (commit->object.flags & UNINTERESTING) || !(commit->object.flags & TREESAME) || (1 < cnt)) st->simplified = commit; else { pst = locate_simplify_state(revs, commit->parents->item); st->simplified = pst->simplified; } return tail; } static void simplify_merges(struct rev_info *revs) { struct commit_list *list; struct commit_list *yet_to_do, **tail; if (!revs->topo_order) sort_in_topological_order(&revs->commits, revs->lifo); if (!revs->prune) return; /* feed the list reversed */ yet_to_do = NULL; for (list = revs->commits; list; list = list->next) commit_list_insert(list->item, &yet_to_do); while (yet_to_do) { list = yet_to_do; yet_to_do = NULL; tail = &yet_to_do; while (list) { struct commit *commit = list->item; struct commit_list *next = list->next; free(list); list = next; tail = simplify_one(revs, commit, tail); } } /* clean up the result, removing the simplified ones */ list = revs->commits; revs->commits = NULL; tail = &revs->commits; while (list) { struct commit *commit = list->item; struct commit_list *next = list->next; struct merge_simplify_state *st; free(list); list = next; st = locate_simplify_state(revs, commit); if (st->simplified == commit) tail = &commit_list_insert(commit, tail)->next; } } static void set_children(struct rev_info *revs) { struct commit_list *l; for (l = revs->commits; l; l = l->next) { struct commit *commit = l->item; struct commit_list *p; for (p = commit->parents; p; p = p->next) add_child(revs, p->item, commit); } } int prepare_revision_walk(struct rev_info *revs) { int nr = revs->pending.nr; struct object_array_entry *e, *list; e = list = revs->pending.objects; revs->pending.nr = 0; revs->pending.alloc = 0; revs->pending.objects = NULL; while (--nr >= 0) { struct commit *commit = handle_commit(revs, e->item, e->name); if (commit) { if (!(commit->object.flags & SEEN)) { commit->object.flags |= SEEN; insert_by_date(commit, &revs->commits); } } e++; } free(list); if (revs->no_walk) return 0; if (revs->limited) if (limit_list(revs) < 0) return -1; if (revs->topo_order) sort_in_topological_order(&revs->commits, revs->lifo); if (revs->simplify_merges) simplify_merges(revs); if (revs->children.name) set_children(revs); return 0; } enum rewrite_result { rewrite_one_ok, rewrite_one_noparents, rewrite_one_error, }; static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp) { struct commit_list *cache = NULL; for (;;) { struct commit *p = *pp; if (!revs->limited) if (add_parents_to_list(revs, p, &revs->commits, &cache) < 0) return rewrite_one_error; if (p->parents && p->parents->next) return rewrite_one_ok; if (p->object.flags & UNINTERESTING) return rewrite_one_ok; if (!(p->object.flags & TREESAME)) return rewrite_one_ok; if (!p->parents) return rewrite_one_noparents; *pp = p->parents->item; } } static int rewrite_parents(struct rev_info *revs, struct commit *commit) { struct commit_list **pp = &commit->parents; while (*pp) { struct commit_list *parent = *pp; switch (rewrite_one(revs, &parent->item)) { case rewrite_one_ok: break; case rewrite_one_noparents: *pp = parent->next; continue; case rewrite_one_error: return -1; } pp = &parent->next; } remove_duplicate_parents(commit); return 0; } static int commit_match(struct commit *commit, struct rev_info *opt) { if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list) return 1; return grep_buffer(&opt->grep_filter, NULL, /* we say nothing, not even filename */ commit->buffer, strlen(commit->buffer)); } static inline int want_ancestry(struct rev_info *revs) { return (revs->rewrite_parents || revs->children.name); } enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit) { if (commit->object.flags & SHOWN) return commit_ignore; if (revs->unpacked && has_sha1_pack(commit->object.sha1)) return commit_ignore; if (revs->show_all) return commit_show; if (commit->object.flags & UNINTERESTING) return commit_ignore; if (revs->min_age != -1 && (commit->date > revs->min_age)) return commit_ignore; if (revs->no_merges && commit->parents && commit->parents->next) return commit_ignore; if (revs->merges_only && !(commit->parents && commit->parents->next)) return commit_ignore; if (!commit_match(commit, revs)) return commit_ignore; if (revs->prune && revs->dense) { /* Commit without changes? */ if (commit->object.flags & TREESAME) { /* drop merges unless we want parenthood */ if (!want_ancestry(revs)) return commit_ignore; /* non-merge - always ignore it */ if (!commit->parents || !commit->parents->next) return commit_ignore; } } return commit_show; } enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit) { enum commit_action action = get_commit_action(revs, commit); if (action == commit_show && !revs->show_all && revs->prune && revs->dense && want_ancestry(revs)) { if (rewrite_parents(revs, commit) < 0) return commit_error; } return action; } static struct commit *get_revision_1(struct rev_info *revs) { if (!revs->commits) return NULL; do { struct commit_list *entry = revs->commits; struct commit *commit = entry->item; revs->commits = entry->next; free(entry); if (revs->reflog_info) fake_reflog_parent(revs->reflog_info, commit); /* * If we haven't done the list limiting, we need to look at * the parents here. We also need to do the date-based limiting * that we'd otherwise have done in limit_list(). */ if (!revs->limited) { if (revs->max_age != -1 && (commit->date < revs->max_age)) continue; if (add_parents_to_list(revs, commit, &revs->commits, NULL) < 0) die("Failed to traverse parents of commit %s", sha1_to_hex(commit->object.sha1)); } switch (simplify_commit(revs, commit)) { case commit_ignore: continue; case commit_error: die("Failed to simplify parents of commit %s", sha1_to_hex(commit->object.sha1)); default: return commit; } } while (revs->commits); return NULL; } static void gc_boundary(struct object_array *array) { unsigned nr = array->nr; unsigned alloc = array->alloc; struct object_array_entry *objects = array->objects; if (alloc <= nr) { unsigned i, j; for (i = j = 0; i < nr; i++) { if (objects[i].item->flags & SHOWN) continue; if (i != j) objects[j] = objects[i]; j++; } for (i = j; i < nr; i++) objects[i].item = NULL; array->nr = j; } } static void create_boundary_commit_list(struct rev_info *revs) { unsigned i; struct commit *c; struct object_array *array = &revs->boundary_commits; struct object_array_entry *objects = array->objects; /* * If revs->commits is non-NULL at this point, an error occurred in * get_revision_1(). Ignore the error and continue printing the * boundary commits anyway. (This is what the code has always * done.) */ if (revs->commits) { free_commit_list(revs->commits); revs->commits = NULL; } /* * Put all of the actual boundary commits from revs->boundary_commits * into revs->commits */ for (i = 0; i < array->nr; i++) { c = (struct commit *)(objects[i].item); if (!c) continue; if (!(c->object.flags & CHILD_SHOWN)) continue; if (c->object.flags & (SHOWN | BOUNDARY)) continue; c->object.flags |= BOUNDARY; commit_list_insert(c, &revs->commits); } /* * If revs->topo_order is set, sort the boundary commits * in topological order */ sort_in_topological_order(&revs->commits, revs->lifo); } static struct commit *get_revision_internal(struct rev_info *revs) { struct commit *c = NULL; struct commit_list *l; if (revs->boundary == 2) { /* * All of the normal commits have already been returned, * and we are now returning boundary commits. * create_boundary_commit_list() has populated * revs->commits with the remaining commits to return. */ c = pop_commit(&revs->commits); if (c) c->object.flags |= SHOWN; return c; } /* * Now pick up what they want to give us */ c = get_revision_1(revs); if (c) { while (0 < revs->skip_count) { revs->skip_count--; c = get_revision_1(revs); if (!c) break; } } /* * Check the max_count. */ switch (revs->max_count) { case -1: break; case 0: c = NULL; break; default: revs->max_count--; } if (c) c->object.flags |= SHOWN; if (!revs->boundary) { return c; } if (!c) { /* * get_revision_1() runs out the commits, and * we are done computing the boundaries. * switch to boundary commits output mode. */ revs->boundary = 2; /* * Update revs->commits to contain the list of * boundary commits. */ create_boundary_commit_list(revs); return get_revision_internal(revs); } /* * boundary commits are the commits that are parents of the * ones we got from get_revision_1() but they themselves are * not returned from get_revision_1(). Before returning * 'c', we need to mark its parents that they could be boundaries. */ for (l = c->parents; l; l = l->next) { struct object *p; p = &(l->item->object); if (p->flags & (CHILD_SHOWN | SHOWN)) continue; p->flags |= CHILD_SHOWN; gc_boundary(&revs->boundary_commits); add_object_array(p, NULL, &revs->boundary_commits); } return c; } struct commit *get_revision(struct rev_info *revs) { struct commit *c; struct commit_list *reversed; if (revs->reverse) { reversed = NULL; while ((c = get_revision_internal(revs))) { commit_list_insert(c, &reversed); } revs->commits = reversed; revs->reverse = 0; revs->reverse_output_stage = 1; } if (revs->reverse_output_stage) return pop_commit(&revs->commits); c = get_revision_internal(revs); if (c && revs->graph) graph_update(revs->graph, c); return c; }