[PATCH/RFC v2 2/2] git-am: add am.threeWay config variable

From

Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>

Date

Jun 2, 2015, 13:24 UTC

Message-ID

<1433251472-29460-2-git-send-email-remi.lespinet@ensimag.grenoble-inp.fr>

In-Reply-To

<1433251472-29460-1-git-send-email-remi.lespinet@ensimag.grenoble-inp.fr>

Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>
---
 Documentation/config.txt |  7 +++++++
 Documentation/git-am.txt |  6 ++++--
 git-am.sh                |  7 +++++++
 t/t4150-am.sh            | 19 +++++++++++++++++++
 4 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index d44bc85..8e42752 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -769,6 +769,13 @@ am.keepcr::
 	by giving '--no-keep-cr' from the command line.
 	See linkgit:git-am[1], linkgit:git-mailsplit[1].
 
+am.threeWay::
+	If true, git-am will fall back on 3-way merge when the patch
+	cannot be applied cleanly, in the same way as the '-3' or
+	'--3-way' option. Can be overridden by giving '--no-3-way'
+	from the command line.
+	See linkgit:git-am[1].
+
 apply.ignoreWhitespace::
 	When set to 'change', tells 'git apply' to ignore changes in
 	whitespace, in the same way as the '--ignore-space-change'
diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 0d8ba48..3190c05 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -89,11 +89,13 @@ default.   You can use `--no-utf8` to override this.
 	linkgit:git-mailinfo[1]).
 
 -3::
---3way::
+--[no-]3way::
 	When the patch does not apply cleanly, fall back on
 	3-way merge if the patch records the identity of blobs
 	it is supposed to apply to and we have those blobs
-	available locally.
+	available locally.  `am.threeWay` configuration variable
+	can be used to specify the default behaviour.  `--no-3way`
+	is useful to override `am.threeWay`.
 
 --ignore-space-change::
 --ignore-whitespace::
diff --git a/git-am.sh b/git-am.sh
index 761befb..781507c 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -389,6 +389,11 @@ then
     keepcr=t
 fi
 
+if test "$(git config --bool --get am.threeWay)" = true
+then
+    threeway=t
+fi
+
 while test $# != 0
 do
 	case "$1" in
@@ -400,6 +405,8 @@ it will be removed. Please do not use it anymore."
 		;;
 	-3|--3way)
 		threeway=t ;;
+	--no-3way)
+		threeway=f ;;
 	-s|--signoff)
 		sign=t ;;
 	-u|--utf8)
diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index 6ced98c..b822a39 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -303,6 +303,25 @@ test_expect_success 'am -3 -p0 can read --no-prefix patch' '
 	git diff --exit-code lorem
 '
 
+test_expect_success 'am with config am.threeWay falls back to 3-way merge' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	git checkout -b lorem4 base3way &&
+	test_config am.threeWay 1 &&
+	git am lorem-move.patch &&
+	test_path_is_missing .git/rebase-apply &&
+	git diff --exit-code lorem
+'
+
+test_expect_success 'am with config am.threeWay overridden by --no-3way' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	git checkout -b lorem5 base3way &&
+	test_config am.threeWay 1 &&
+	test_must_fail git am --no-3way lorem-move.patch &&
+	test_path_is_dir .git/rebase-apply
+'
+
 test_expect_success 'am can rename a file' '
 	grep "^rename from" rename.patch &&
 	rm -fr .git/rebase-apply &&

-- 
1.9.1