sort_in_topological_order(): avoid setting a commit flag

We used to set the TOPOSORT flag of commits during the topological
sorting, but we can just as well use the member "indegree" for it:
indegree is now incremented by 1 in the cases where the commit used
to have the TOPOSORT flag.

This is the same behavior as before, since indegree could not be
non-zero when TOPOSORT was unset.

Incidentally, this fixes the bug in show-branch where the 8th column
was not shown: show-branch sorts the commits in topological order,
assuming that all the commit flags are available for show-branch's
private matters.

But this was not true: TOPOSORT was identical to the flag corresponding
to the 8th ref.  So the flags for the 8th column were unset by the
topological sorting.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/commit.c b/commit.c
index 5148ec552708bb6c98cc64a84647ec7715ad1c29..dc0c5bfdab7296bf7febb6f1b1aad64550838c15 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -436,8 +436,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
        /* Mark them and clear the indegree */
        for (next = orig; next; next = next->next) {
                struct commit *commit = next->item;
-               commit->object.flags |= TOPOSORT;
-               commit->indegree = 0;
+               commit->indegree = 1;
        }
 
        /* update the indegree */
@@ -446,7 +445,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
                while (parents) {
                        struct commit *parent = parents->item;
 
-                       if (parent->object.flags & TOPOSORT)
+                       if (parent->indegree)
                                parent->indegree++;
                        parents = parents->next;
                }
@@ -464,7 +463,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
        for (next = orig; next; next = next->next) {
                struct commit *commit = next->item;
 
-               if (!commit->indegree)
+               if (commit->indegree == 1)
                        insert = &commit_list_insert(commit, insert)->next;
        }
 
@@ -486,7 +485,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
                for (parents = commit->parents; parents ; parents = parents->next) {
                        struct commit *parent=parents->item;
 
-                       if (!(parent->object.flags & TOPOSORT))
+                       if (!parent->indegree)
                                continue;
 
                        /*
@@ -494,7 +493,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
                         * when all their children have been emitted thereby
                         * guaranteeing topological order.
                         */
-                       if (!--parent->indegree) {
+                       if (--parent->indegree == 1) {
                                if (!lifo)
                                        insert_by_date(parent, &work);
                                else
@@ -505,7 +504,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
                 * work_item is a commit all of whose children
                 * have already been emitted. we can emit it now.
                 */
-               commit->object.flags &= ~TOPOSORT;
+               commit->indegree = 0;
                *pptr = work_item;
                pptr = &work_item->next;
        }

diff --git a/revision.h b/revision.h
index fa68c651424e406ce84c890a655a5e292a7e5af6..f64e8ce7ff999e9fe4a01205ae51775827484ed4 100644 (file)
--- a/revision.h
+++ b/revision.h
@@ -12,8 +12,7 @@
 #define CHILD_SHOWN    (1u<<6)
 #define ADDED          (1u<<7) /* Parents already parsed and added? */
 #define SYMMETRIC_LEFT (1u<<8)
-#define TOPOSORT       (1u<<9) /* In the active toposort list.. */
-#define ALL_REV_FLAGS  ((1u<<10)-1)
+#define ALL_REV_FLAGS  ((1u<<9)-1)
 
 struct rev_info;
 struct log_info;

diff --git a/t/t3202-show-branch-octopus.sh b/t/t3202-show-branch-octopus.sh
index 8d50c23b84dad390a66edc1c3e80007ef43fa3a3..7fe4a6ecb05df0fbfb825fbb08207f7672e1775f 100755 (executable)
--- a/t/t3202-show-branch-octopus.sh
+++ b/t/t3202-show-branch-octopus.sh
@@ -49,7 +49,7 @@ cat > expect << EOF
 +++++++++* [branch10^] initial
 EOF
 
-test_expect_failure 'show-branch with more than 8 branches' '
+test_expect_success 'show-branch with more than 8 branches' '
 
        git show-branch $(for i in $numbers; do echo branch$i; done) > out &&
        test_cmp expect out