Release config lock if the regex is invalid
[git.git] / revision.c
index 12cd052..5f2f0be 100644 (file)
@@ -233,25 +233,20 @@ static void file_change(struct diff_options *options,
        tree_difference = REV_TREE_DIFFERENT;
 }
 
-static struct diff_options diff_opt = {
-       .recursive = 1,
-       .add_remove = file_add_remove,
-       .change = file_change,
-};
-
-int rev_compare_tree(struct tree *t1, struct tree *t2)
+int rev_compare_tree(struct rev_info *revs, struct tree *t1, struct tree *t2)
 {
        if (!t1)
                return REV_TREE_NEW;
        if (!t2)
                return REV_TREE_DIFFERENT;
        tree_difference = REV_TREE_SAME;
-       if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
+       if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "",
+                          &revs->diffopt) < 0)
                return REV_TREE_DIFFERENT;
        return tree_difference;
 }
 
-int rev_same_tree_as_empty(struct tree *t1)
+int rev_same_tree_as_empty(struct rev_info *revs, struct tree *t1)
 {
        int retval;
        void *tree;
@@ -260,7 +255,7 @@ int rev_same_tree_as_empty(struct tree *t1)
        if (!t1)
                return 0;
 
-       tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL);
+       tree = read_object_with_reference(t1->object.sha1, tree_type, &real.size, NULL);
        if (!tree)
                return 0;
        real.buf = tree;
@@ -269,7 +264,7 @@ int rev_same_tree_as_empty(struct tree *t1)
        empty.size = 0;
 
        tree_difference = 0;
-       retval = diff_tree(&empty, &real, "", &diff_opt);
+       retval = diff_tree(&empty, &real, "", &revs->diffopt);
        free(tree);
 
        return retval >= 0 && !tree_difference;
@@ -284,7 +279,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                return;
 
        if (!commit->parents) {
-               if (!rev_same_tree_as_empty(commit->tree))
+               if (!rev_same_tree_as_empty(revs, commit->tree))
                        commit->object.flags |= TREECHANGE;
                return;
        }
@@ -294,7 +289,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                struct commit *p = parent->item;
 
                parse_commit(p);
-               switch (rev_compare_tree(p->tree, commit->tree)) {
+               switch (rev_compare_tree(revs, p->tree, commit->tree)) {
                case REV_TREE_SAME:
                        if (p->object.flags & UNINTERESTING) {
                                /* Even if a merge with an uninteresting
@@ -312,7 +307,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
 
                case REV_TREE_NEW:
                        if (revs->remove_empty_trees &&
-                           rev_same_tree_as_empty(p->tree)) {
+                           rev_same_tree_as_empty(revs, p->tree)) {
                                /* We are adding all the specified
                                 * paths from this parent, so the
                                 * history beyond this parent is not
@@ -340,6 +335,10 @@ static void add_parents_to_list(struct rev_info *revs, struct commit *commit, st
 {
        struct commit_list *parent = commit->parents;
 
+       if (commit->object.flags & ADDED)
+               return;
+       commit->object.flags |= ADDED;
+
        /*
         * If the commit is uninteresting, don't try to
         * prune parents - we want the maximal uninteresting
@@ -419,6 +418,36 @@ static void limit_list(struct rev_info *revs)
                        continue;
                p = &commit_list_insert(commit, p)->next;
        }
+       if (revs->boundary) {
+               /* mark the ones that are on the result list first */
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       commit->object.flags |= TMP_MARK;
+               }
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       struct object *obj = &commit->object;
+                       struct commit_list *parent;
+                       if (obj->flags & UNINTERESTING)
+                               continue;
+                       for (parent = commit->parents;
+                            parent;
+                            parent = parent->next) {
+                               struct commit *pcommit = parent->item;
+                               if (!(pcommit->object.flags & UNINTERESTING))
+                                       continue;
+                               pcommit->object.flags |= BOUNDARY;
+                               if (pcommit->object.flags & TMP_MARK)
+                                       continue;
+                               pcommit->object.flags |= TMP_MARK;
+                               p = &commit_list_insert(pcommit, p)->next;
+                       }
+               }
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       commit->object.flags &= ~TMP_MARK;
+               }
+       }
        revs->commits = newlist;
 }
 
@@ -450,6 +479,9 @@ static void handle_all(struct rev_info *revs, unsigned flags)
 void init_revisions(struct rev_info *revs)
 {
        memset(revs, 0, sizeof(*revs));
+       revs->diffopt.recursive = 1;
+       revs->diffopt.add_remove = file_add_remove;
+       revs->diffopt.change = file_change;
        revs->lifo = 1;
        revs->dense = 1;
        revs->prefix = setup_git_directory();
@@ -505,7 +537,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                revs->max_count = atoi(arg + 12);
                                continue;
                        }
-                       /* accept -<digit>, like traditilnal "head" */
+                       /* accept -<digit>, like traditional "head" */
                        if ((*arg == '-') && isdigit(arg[1])) {
                                revs->max_count = atoi(arg + 1);
                                continue;
@@ -522,32 +554,26 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strncmp(arg, "--max-age=", 10)) {
                                revs->max_age = atoi(arg + 10);
-                               revs->limited = 1;
-                               continue;
-                       }
-                       if (!strncmp(arg, "--min-age=", 10)) {
-                               revs->min_age = atoi(arg + 10);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--since=", 8)) {
                                revs->max_age = approxidate(arg + 8);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--after=", 8)) {
                                revs->max_age = approxidate(arg + 8);
-                               revs->limited = 1;
+                               continue;
+                       }
+                       if (!strncmp(arg, "--min-age=", 10)) {
+                               revs->min_age = atoi(arg + 10);
                                continue;
                        }
                        if (!strncmp(arg, "--before=", 9)) {
                                revs->min_age = approxidate(arg + 9);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--until=", 8)) {
                                revs->min_age = approxidate(arg + 8);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--all")) {
@@ -566,13 +592,15 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strcmp(arg, "--topo-order")) {
                                revs->topo_order = 1;
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--date-order")) {
                                revs->lifo = 0;
                                revs->topo_order = 1;
-                               revs->limited = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--parents")) {
+                               revs->parents = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--dense")) {
@@ -587,10 +615,14 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                revs->remove_empty_trees = 1;
                                continue;
                        }
-                       if (!strncmp(arg, "--no-merges", 11)) {
+                       if (!strcmp(arg, "--no-merges")) {
                                revs->no_merges = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--boundary")) {
+                               revs->boundary = 1;
+                               continue;
+                       }
                        if (!strcmp(arg, "--objects")) {
                                revs->tag_objects = 1;
                                revs->tree_objects = 1;
@@ -606,7 +638,6 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strcmp(arg, "--unpacked")) {
                                revs->unpacked = 1;
-                               revs->limited = 1;
                                continue;
                        }
                        *unrecognized++ = arg;
@@ -616,15 +647,19 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                dotdot = strstr(arg, "..");
                if (dotdot) {
                        unsigned char from_sha1[20];
-                       char *next = dotdot + 2;
+                       const char *next = dotdot + 2;
+                       const char *this = arg;
                        *dotdot = 0;
                        if (!*next)
                                next = "HEAD";
-                       if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
+                       if (dotdot == arg)
+                               this = "HEAD";
+                       if (!get_sha1(this, from_sha1) &&
+                           !get_sha1(next, sha1)) {
                                struct commit *exclude;
                                struct commit *include;
 
-                               exclude = get_commit_reference(revs, arg, from_sha1, flags ^ UNINTERESTING);
+                               exclude = get_commit_reference(revs, this, from_sha1, flags ^ UNINTERESTING);
                                include = get_commit_reference(revs, next, sha1, flags);
                                if (!exclude || !include)
                                        die("Invalid revision range %s..%s", arg, next);
@@ -640,17 +675,15 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        arg++;
                }
                if (get_sha1(arg, sha1) < 0) {
-                       struct stat st;
                        int j;
 
                        if (seen_dashdash || local_flags)
                                die("bad revision '%s'", arg);
 
                        /* If we didn't have a "--", all filenames must exist */
-                       for (j = i; j < argc; j++) {
-                               if (lstat(argv[j], &st) < 0)
-                                       die("'%s': %s", arg, strerror(errno));
-                       }
+                       for (j = i; j < argc; j++)
+                               verify_filename(revs->prefix, argv[j]);
+
                        revs->prune_data = get_pathspec(revs->prefix, argv + i);
                        break;
                }
@@ -666,10 +699,12 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                add_one_commit(commit, revs);
        }
 
+       if (revs->topo_order || revs->unpacked)
+               revs->limited = 1;
+
        if (revs->prune_data) {
-               diff_tree_setup_paths(revs->prune_data);
+               diff_tree_setup_paths(revs->prune_data, &revs->diffopt);
                revs->prune_fn = try_to_simplify_commit;
-               revs->limited = 1;
        }
 
        return left;
@@ -686,10 +721,12 @@ void prepare_revision_walk(struct rev_info *revs)
                                             revs->topo_getter);
 }
 
-static int rewrite_one(struct commit **pp)
+static int rewrite_one(struct rev_info *revs, struct commit **pp)
 {
        for (;;) {
                struct commit *p = *pp;
+               if (!revs->limited)
+                       add_parents_to_list(revs, p, &revs->commits);
                if (p->object.flags & (TREECHANGE | UNINTERESTING))
                        return 0;
                if (!p->parents)
@@ -698,12 +735,12 @@ static int rewrite_one(struct commit **pp)
        }
 }
 
-static void rewrite_parents(struct commit *commit)
+static void rewrite_parents(struct rev_info *revs, struct commit *commit)
 {
        struct commit_list **pp = &commit->parents;
        while (*pp) {
                struct commit_list *parent = *pp;
-               if (rewrite_one(&parent->item) < 0) {
+               if (rewrite_one(revs, &parent->item) < 0) {
                        *pp = parent->next;
                        continue;
                }
@@ -711,6 +748,17 @@ static void rewrite_parents(struct commit *commit)
        }
 }
 
+static void mark_boundary_to_show(struct commit *commit)
+{
+       struct commit_list *p = commit->parents;
+       while (p) {
+               commit = p->item;
+               p = p->next;
+               if (commit->object.flags & BOUNDARY)
+                       commit->object.flags |= BOUNDARY_SHOW;
+       }
+}
+
 struct commit *get_revision(struct rev_info *revs)
 {
        struct commit_list *list = revs->commits;
@@ -731,26 +779,53 @@ struct commit *get_revision(struct rev_info *revs)
        do {
                struct commit *commit = revs->commits->item;
 
-               if (commit->object.flags & (UNINTERESTING|SHOWN))
-                       goto next;
+               revs->commits = revs->commits->next;
+
+               /*
+                * 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->unpacked &&
+                            has_sha1_pack(commit->object.sha1)) ||
+                           (revs->max_age != -1 &&
+                            (commit->date < revs->max_age)))
+                               continue;
+                       add_parents_to_list(revs, commit, &revs->commits);
+               }
+               if (commit->object.flags & SHOWN)
+                       continue;
+
+               /* We want to show boundary commits only when their
+                * children are shown.  When path-limiter is in effect,
+                * rewrite_parents() drops some commits from getting shown,
+                * and there is no point showing boundary parents that
+                * are not shown.  After rewrite_parents() rewrites the
+                * parents of a commit that is shown, we mark the boundary
+                * parents with BOUNDARY_SHOW.
+                */
+               if (commit->object.flags & BOUNDARY_SHOW) {
+                       commit->object.flags |= SHOWN;
+                       return commit;
+               }
+               if (commit->object.flags & UNINTERESTING)
+                       continue;
                if (revs->min_age != -1 && (commit->date > revs->min_age))
-                       goto next;
-               if (revs->max_age != -1 && (commit->date < revs->max_age))
-                       return NULL;
-               if (revs->no_merges && commit->parents && commit->parents->next)
-                       goto next;
+                       continue;
+               if (revs->no_merges &&
+                   commit->parents && commit->parents->next)
+                       continue;
                if (revs->prune_fn && revs->dense) {
                        if (!(commit->object.flags & TREECHANGE))
-                               goto next;
-                       rewrite_parents(commit);
+                               continue;
+                       if (revs->parents)
+                               rewrite_parents(revs, commit);
                }
-               /* More to go? */
-               if (revs->max_count)
-                       pop_most_recent_commit(&revs->commits, SEEN);
+               if (revs->boundary)
+                       mark_boundary_to_show(commit);
                commit->object.flags |= SHOWN;
                return commit;
-next:
-               pop_most_recent_commit(&revs->commits, SEEN);
        } while (revs->commits);
        return NULL;
 }