[PATCH 1/2] mergetool: honor tempfile configuration when resolving delete conflicts

[PATCH 1/2] mergetool: honor tempfile configuration when resolving delete conflicts

[David Aguilar]

Teach resolve_deleted_merge() to honor the mergetool.keepBackup and
mergetool.keepTemporaries configuration knobs.

This ensures that the worktree is kept pristine when resolving deletion
conflicts with the variables both set to false.

Signed-off-by: David Aguilar <davvid@gmail.com>
---
 git-mergetool.sh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/git-mergetool.sh b/git-mergetool.sh
index 9f77e3a..615265d 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -126,7 +126,12 @@ resolve_deleted_merge () {
 		case "$ans" in
 		[mMcC]*)
 			git add -- "$MERGED"
-			cleanup_temp_files --save-backup
+			if "$merge_keep_backup" = "true"
+			then
+				cleanup_temp_files --save-backup
+			else
+				cleanup_temp_files
+			fi
 			return 0
 			;;
 		[dD]*)
@@ -135,6 +140,10 @@ resolve_deleted_merge () {
 			return 0
 			;;
 		[aA]*)
+			if test "$merge_keep_temporaries" = "false"
+			then
+				cleanup_temp_files
+			fi
 			return 1
 			;;
 		esac
-- 
2.8.0.rc1.2.g28ba210

[PATCH 2/2] mergetool: support delete/delete conflicts

[David Aguilar]

If two branches each move a file into different directories then
mergetool will fail because it assumes that the file being merged, and
its parent directory, are present in the worktree.

Create the merge file's parent directory to allow using the
deleted base version of the file for merge resolution when
encountering a delete/delete conflict.

The end result is that a delete/delete conflict is presented for the
user to resolve.

Reported-by: Joe Einertson <joe@kidblog.org>
Signed-off-by: David Aguilar <davvid@gmail.com>
---
 git-mergetool.sh     | 14 +++++++++++---
 t/t7610-mergetool.sh | 30 ++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/git-mergetool.sh b/git-mergetool.sh
index 615265d..000f167 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -291,8 +291,14 @@ merge_file () {
 		return
 	fi
 
-	mv -- "$MERGED" "$BACKUP"
-	cp -- "$BACKUP" "$MERGED"
+	if test -f "$MERGED"
+	then
+		mv -- "$MERGED" "$BACKUP"
+		cp -- "$BACKUP" "$MERGED"
+	fi
+	# Create a parent directory to handle delete/delete conflicts
+	# where the base's directory no longer exists.
+	mkdir -p "$(dirname "$MERGED")"
 
 	checkout_staged_file 1 "$MERGED" "$BASE"
 	checkout_staged_file 2 "$MERGED" "$LOCAL"
@@ -304,7 +310,9 @@ merge_file () {
 		describe_file "$local_mode" "local" "$LOCAL"
 		describe_file "$remote_mode" "remote" "$REMOTE"
 		resolve_deleted_merge
-		return
+		status=$?
+		rmdir -p "$(dirname "$MERGED")" 2>/dev/null
+		return $status
 	fi
 
 	if is_symlink "$local_mode" || is_symlink "$remote_mode"
diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
index 6f12b23..f1668be 100755
--- a/t/t7610-mergetool.sh
+++ b/t/t7610-mergetool.sh
@@ -243,6 +243,36 @@ test_expect_success 'mergetool takes partial path' '
 	git reset --hard
 '
 
+test_expect_success 'mergetool delete/delete conflict' '
+	git checkout -b delete-base branch1 &&
+	mkdir -p a/a &&
+	(echo one; echo two; echo 3; echo 4) >a/a/file.txt &&
+	git add a/a/file.txt &&
+	git commit -m"base file" &&
+	git checkout -b move-to-b delete-base &&
+	mkdir -p b/b &&
+	git mv a/a/file.txt b/b/file.txt &&
+	(echo one; echo two; echo 4) >b/b/file.txt &&
+	git commit -a -m"move to b" &&
+	git checkout -b move-to-c delete-base &&
+	mkdir -p c/c &&
+	git mv a/a/file.txt c/c/file.txt &&
+	(echo one; echo two; echo 3) >c/c/file.txt &&
+	git commit -a -m"move to c" &&
+	! git merge move-to-b &&
+	echo d | git mergetool a/a/file.txt &&
+	! test -f a/a/file.txt &&
+	git reset --hard HEAD &&
+	! git merge move-to-b &&
+	echo m | git mergetool a/a/file.txt &&
+	test -f b/b/file.txt &&
+	git reset --hard HEAD &&
+	! git merge move-to-b &&
+	! echo a | git mergetool a/a/file.txt &&
+	! test -f a/a/file.txt &&
+	git reset --hard HEAD
+'
+
 test_expect_success 'deleted vs modified submodule' '
 	git checkout -b test6 branch1 &&
 	git submodule update -N &&
-- 
2.8.0.rc1.2.g28ba210

Re: [PATCH 1/2] mergetool: honor tempfile configuration when resolving delete conflicts

[Junio C Hamano]

David Aguilar <davvid@gmail.com> writes:

> Teach resolve_deleted_merge() to honor the mergetool.keepBackup and
> mergetool.keepTemporaries configuration knobs.
>
> This ensures that the worktree is kept pristine when resolving deletion
> conflicts with the variables both set to false.
>
> Signed-off-by: David Aguilar <davvid@gmail.com>
> ---
>  git-mergetool.sh | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/git-mergetool.sh b/git-mergetool.sh
> index 9f77e3a..615265d 100755
> --- a/git-mergetool.sh
> +++ b/git-mergetool.sh
> @@ -126,7 +126,12 @@ resolve_deleted_merge () {
>  		case "$ans" in
>  		[mMcC]*)
>  			git add -- "$MERGED"
> -			cleanup_temp_files --save-backup
> +			if "$merge_keep_backup" = "true"

The command run as the "if" condition is probably "test", like in
the other hunk?

> +			then
> +				cleanup_temp_files --save-backup
> +			else
> +				cleanup_temp_files
> +			fi
>  			return 0
>  			;;
>  		[dD]*)
> @@ -135,6 +140,10 @@ resolve_deleted_merge () {
>  			return 0
>  			;;
>  		[aA]*)
> +			if test "$merge_keep_temporaries" = "false"
> +			then
> +				cleanup_temp_files
> +			fi
>  			return 1
>  			;;
>  		esac