unpack-trees: allow Porcelain to give different error messages

diff --git a/builtin-rev-list.c b/builtin-rev-list.c
index f5149e59b7c04d943f3b90f706a66d185f8a396c..edc0bd35bb0e96a230284250dc4c40776cf7caac 100644 (file)
--- a/builtin-rev-list.c
+++ b/builtin-rev-list.c
@@ -25,11 +25,15 @@ static const char rev_list_usage[] =
 "    --no-merges\n"
 "    --remove-empty\n"
 "    --all\n"
+"    --branches\n"
+"    --tags\n"
+"    --remotes\n"
 "    --stdin\n"
 "    --quiet\n"
 "  ordering output:\n"
 "    --topo-order\n"
 "    --date-order\n"
+"    --reverse\n"
 "  formatting output:\n"
 "    --parents\n"
 "    --objects | --objects-edge\n"
@@ -60,6 +64,8 @@ static void show_commit(struct commit *commit)
                fputs(header_prefix, stdout);
        if (commit->object.flags & BOUNDARY)
                putchar('-');
+       else if (commit->object.flags & UNINTERESTING)
+               putchar('^');
        else if (revs.left_right) {
                if (commit->object.flags & SYMMETRIC_LEFT)
                        putchar('<');
@@ -84,7 +90,7 @@ static void show_commit(struct commit *commit)
        else
                putchar('\n');
 
-       if (revs.verbose_header) {
+       if (revs.verbose_header && commit->buffer) {
                struct strbuf buf;
                strbuf_init(&buf, 0);
                pretty_print_commit(revs.commit_format, commit,
@@ -153,7 +159,7 @@ static int count_distance(struct commit_list *entry)
 
                if (commit->object.flags & (UNINTERESTING | COUNTED))
                        break;
-               if (!revs.prune_fn || (commit->object.flags & TREECHANGE))
+               if (!(commit->object.flags & TREESAME))
                        nr++;
                commit->object.flags |= COUNTED;
                p = commit->parents;
@@ -209,7 +215,7 @@ static inline int halfway(struct commit_list *p, int nr)
        /*
         * Don't short-cut something we are not going to return!
         */
-       if (revs.prune_fn && !(p->item->object.flags & TREECHANGE))
+       if (p->item->object.flags & TREESAME)
                return 0;
        if (DEBUG_BISECT)
                return 0;
@@ -245,7 +251,7 @@ static void show_list(const char *debug, int counted, int nr,
                char *ep, *sp;
 
                fprintf(stderr, "%c%c%c ",
-                       (flags & TREECHANGE) ? 'T' : ' ',
+                       (flags & TREESAME) ? ' ' : 'T',
                        (flags & UNINTERESTING) ? 'U' : ' ',
                        (flags & COUNTED) ? 'C' : ' ');
                if (commit->util)
@@ -279,7 +285,7 @@ static struct commit_list *best_bisection(struct commit_list *list, int nr)
                int distance;
                unsigned flags = p->item->object.flags;
 
-               if (revs.prune_fn && !(flags & TREECHANGE))
+               if (flags & TREESAME)
                        continue;
                distance = weight(p);
                if (nr - distance < distance)
@@ -319,7 +325,7 @@ static struct commit_list *best_bisection_sorted(struct commit_list *list, int n
                int distance;
                unsigned flags = p->item->object.flags;
 
-               if (revs.prune_fn && !(flags & TREECHANGE))
+               if (flags & TREESAME)
                        continue;
                distance = weight(p);
                if (nr - distance < distance)
@@ -373,7 +379,7 @@ static struct commit_list *do_find_bisection(struct commit_list *list,
                p->item->util = &weights[n++];
                switch (count_interesting_parents(commit)) {
                case 0:
-                       if (!revs.prune_fn || (flags & TREECHANGE)) {
+                       if (!(flags & TREESAME)) {
                                weight_set(p, 1);
                                counted++;
                                show_list("bisection 2 count one",
@@ -446,7 +452,7 @@ static struct commit_list *do_find_bisection(struct commit_list *list,
                         * add one for p itself if p is to be counted,
                         * otherwise inherit it from q directly.
                         */
-                       if (!revs.prune_fn || (flags & TREECHANGE)) {
+                       if (!(flags & TREESAME)) {
                                weight_set(p, weight(q)+1);
                                counted++;
                                show_list("bisection 2 count one",
@@ -493,7 +499,7 @@ static struct commit_list *find_bisection(struct commit_list *list,
                        continue;
                p->next = last;
                last = p;
-               if (!revs.prune_fn || (flags & TREECHANGE))
+               if (!(flags & TREESAME))
                        nr++;
                on_list++;
        }
@@ -520,7 +526,7 @@ static void read_revisions_from_stdin(struct rev_info *revs)
 
        while (fgets(line, sizeof(line), stdin) != NULL) {
                int len = strlen(line);
-               if (line[len - 1] == '\n')
+               if (len && line[len - 1] == '\n')
                        line[--len] = 0;
                if (!len)
                        break;
@@ -605,11 +611,11 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
                usage(rev_list_usage);
 
        save_commit_buffer = revs.verbose_header || revs.grep_filter;
-       track_object_refs = 0;
        if (bisect_list)
                revs.limited = 1;
 
-       prepare_revision_walk(&revs);
+       if (prepare_revision_walk(&revs))
+               die("revision walk setup failed");
        if (revs.tree_objects)
                mark_edges_uninteresting(revs.commits, &revs, show_edge);