Re: [PATCH v2] merge-tree: don't print entries that match "local"

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Am 07.04.2013 23:07, schrieb John Keeping:
The documentation says:

	the output from the command omits entries that match the
	<branch1> tree.

But currently "added in branch1" and "removed in branch1" (both while
unchanged in branch2) do print output.  Change this so that the
behaviour matches the documentation.

Signed-off-by: John Keeping <john@xxxxxxxxxxxxx>
---
  builtin/merge-tree.c  | 26 +++++++++++++-------------
  t/t4300-merge-tree.sh | 10 ----------
  2 files changed, 13 insertions(+), 23 deletions(-)

diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index bc912e3..ed25d81 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -155,6 +155,11 @@ static int same_entry(struct name_entry *a, struct name_entry *b)
  		a->mode == b->mode;
  }

+static int both_empty(struct name_entry *a, struct name_entry *b)
+{
+	return !(a->sha1 || b->sha1);
+}
+
  static struct merge_list *create_entry(unsigned stage, unsigned mode, const unsigned char *sha1, const char *path)
  {
  	struct merge_list *res = xcalloc(1, sizeof(*res));
@@ -297,13 +302,10 @@ static void unresolved(const struct traverse_info *info, struct name_entry n[3])
  static int threeway_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *info)
  {
  	/* Same in both? */
-	if (same_entry(entry+1, entry+2)) {
-		if (entry[0].sha1) {
-			/* Modified identically */
-			resolve(info, NULL, entry+1);
-			return mask;
-		}
-		/* "Both added the same" is left unresolved */
+	if (same_entry(entry+1, entry+2) || both_empty(entry+0, entry+2)) {

Shouldn't this zero be a one instead?

+		/* Modified, added or removed identically */
+		resolve(info, NULL, entry+1);
+		return mask;
  	}

  	if (same_entry(entry+0, entry+1)) {
@@ -319,12 +321,10 @@ static int threeway_callback(int n, unsigned long mask, unsigned long dirmask, s
  		 */
  	}

-	if (same_entry(entry+0, entry+2)) {
-		if (entry[1].sha1 && !S_ISDIR(entry[1].mode)) {
-			/* We modified, they did not touch -- take ours */
-			resolve(info, NULL, entry+1);
-			return mask;
-		}
+	if (same_entry(entry+0, entry+2) || both_empty(entry+0, entry+2)) {

Otherwise the both_empty check here can be removed because we'd have already returned above if it was true.

But do we actually want to resolve the removal of a file on both sides silently? The added comment above says so, but the commit message doesn't mention it.

+		/* We added, modified or removed, they did not touch -- take ours */
+		resolve(info, NULL, entry+1);
+		return mask;
  	}

  	unresolved(info, entry);
diff --git a/t/t4300-merge-tree.sh b/t/t4300-merge-tree.sh
index d0b2a45..bd43b3d 100755
--- a/t/t4300-merge-tree.sh
+++ b/t/t4300-merge-tree.sh
@@ -26,8 +26,6 @@ EXPECTED

  test_expect_success 'file add !A, B' '
  	cat >expected <<\EXPECTED &&
-added in local
-  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
  EXPECTED

  	git reset --hard initial &&
@@ -38,9 +36,6 @@ EXPECTED

  test_expect_success 'file add A, B (same)' '
  	cat >expected <<\EXPECTED &&
-added in both
-  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  their  100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
  EXPECTED

  	git reset --hard initial &&
@@ -181,9 +176,6 @@ AAA" &&

  test_expect_success 'file remove A, !B' '
  	cat >expected <<\EXPECTED &&
-removed in local
-  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  their  100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
  EXPECTED

  	git reset --hard initial &&
@@ -283,8 +275,6 @@ test_expect_success 'turn tree to file' '
  	test_commit "make-file" "dir" "CCC" &&
  	git merge-tree add-tree add-another-tree make-file >actual &&
  	cat >expect <<-\EOF &&
-	added in local
-	  our    100644 ba629238ca89489f2b350e196ca445e09d8bb834 dir/another
  	removed in remote
  	  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path
  	  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path


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