Keep untracked files not involved in a merge.

spearce · Junio C Hamano · commit 183d79724f6c · 2007-02-03T22:04:28.000-08:00
My earlier fix (8371234) to delete renamed tracked files from the working directory also caused merge-recursive to delete untracked files that were in the working directory. The problem here is merge-recursive is deleting the working directory file without regard for which branch it was associated with. What we really want to do during a merge is to only delete files that were renamed by the branch we are merging into the current branch, and that are still tracked by the current branch. These files definitely don't belong in the working directory anymore. Anything else is either a merge conflict (already handled in other parts of the code) or a file that is untracked by the current branch and thus is not even participating in the merge. Its this latter class that must be left alone. For this fix to work we are now assuming that the first non-base argument passed to git-merge-recursive always corresponds to the working directory. This is already true for all in-tree callers of merge-recursive. This assumption is also supported by the long time usage message of "<base> ... -- <head> <remote>", where "<head>" is implied to be HEAD, which is generally assumed to be the current tree-ish. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/merge-recursive.c b/merge-recursive.c
@@ -891,7 +891,7 @@ static int process_renames(struct path_list *a_renames,
 			struct diff_filespec src_other, dst_other;
 			int try_merge, stage = a_renames == renames1 ? 3: 2;
 
-			remove_file(1, ren1_src, index_only);
+			remove_file(1, ren1_src, index_only || stage == 3);
 
 			hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha);
 			src_other.mode = ren1->src_entry->stages[stage].mode;
diff --git a/t/t6023-merge-rename-nocruft.sh b/t/t6023-merge-rename-nocruft.sh
@@ -45,6 +45,7 @@ git add A M &&
 git commit -m "initial has A and M" &&
 git branch white &&
 git branch red &&
+git branch blue &&
 
 git checkout white &&
 sed -e "/^g /s/.*/g : white changes a line/" <A >B &&
@@ -58,6 +59,13 @@ echo created by red >R &&
 git update-index --add R &&
 git commit -m "red creates R" &&
 
+git checkout blue &&
+sed -e "/^o /s/.*/g : blue changes a line/" <A >B &&
+rm -f A &&
+mv B A &&
+git update-index A &&
+git commit -m "blue modify A" &&
+
 git checkout master'
 
 # This test broke in 65ac6e9c3f47807cb603af07a6a9e1a43bc119ae
@@ -94,4 +102,38 @@ test_expect_success 'merge white into red (A->B,M->N)' \
 	return 0
 '
 
+# This test broke in 8371234ecaaf6e14fe3f2082a855eff1bbd79ae9
+test_expect_success 'merge blue into white (A->B, mod A, A untracked)' \
+'
+	git checkout -b white-blue white &&
+	echo dirty >A &&
+	git merge blue &&
+	git write-tree >/dev/null || {
+		echo "BAD: merge did not complete"
+		return 1
+	}
+
+	test -f A || {
+		echo "BAD: A does not exist in working directory"
+		return 1
+	}
+	test `cat A` = dirty || {
+		echo "BAD: A content is wrong"
+		return 1
+	}
+	test -f B || {
+		echo "BAD: B does not exist in working directory"
+		return 1
+	}
+	test -f N || {
+		echo "BAD: N does not exist in working directory"
+		return 1
+	}
+	test -f M && {
+		echo "BAD: M still exists in working directory"
+		return 1
+	}
+	return 0
+'
+
 test_done
