Merge branch 'jt/use-trailer-api-in-commands'

Commands that operate on a log message and add lines to the trailer
blocks, such as "format-patch -s", "cherry-pick (-x|-s)", and
"commit -s", have been taught to use the logic of and share the
code with "git interpret-trailer".

* jt/use-trailer-api-in-commands:
  sequencer: use trailer's trailer layout
  trailer: have function to describe trailer layout
  trailer: avoid unnecessary splitting on lines
  commit: make ignore_non_trailer take buf/len
  trailer: be stricter in parsing separators

3 files changed, 81 insertions, 8 deletions

diff --git a/t/t3511-cherry-pick-x.sh b/t/t3511-cherry-pick-x.sh
index 9cce5ae88..bf0a5c988 100755
--- a/t/t3511-cherry-pick-x.sh
+++ b/t/t3511-cherry-pick-x.sh
@@ -25,9 +25,8 @@ Signed-off-by: B.U. Thor <buthor@example.com>"
 
 mesg_broken_footer="$mesg_no_footer
 
-The signed-off-by string should begin with the words Signed-off-by followed
-by a colon and space, and then the signers name and email address. e.g.
-Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
+This is not recognized as a footer because Myfooter is not a recognized token.
+Myfooter: A.U. Thor <author@example.com>"
 
 mesg_with_footer_sob="$mesg_with_footer
 Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
@@ -112,6 +111,17 @@ test_expect_success 'cherry-pick -s inserts blank line after non-conforming foot
 	test_cmp expect actual
 '
 
+test_expect_success 'cherry-pick -s recognizes trailer config' '
+	pristine_detach initial &&
+	git -c "trailer.Myfooter.ifexists=add" cherry-pick -s mesg-broken-footer &&
+	cat <<-EOF >expect &&
+		$mesg_broken_footer
+		Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>
+	EOF
+	git log -1 --pretty=format:%B >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'cherry-pick -x inserts blank line when conforming footer not found' '
 	pristine_detach initial &&
 	sha1=$(git rev-parse mesg-no-footer^0) &&
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index ba4902df2..482112ca3 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -1294,8 +1294,7 @@ EOF
 4:Subject: [PATCH] subject
 8:
 10:Signed-off-by: example happens to be wrapped here.
-11:
-12:Signed-off-by: C O Mitter <committer@example.com>
+11:Signed-off-by: C O Mitter <committer@example.com>
 EOF
 	test_cmp expected actual
 '
@@ -1368,7 +1367,7 @@ EOF
 	test_cmp expected actual
 '
 
-test_expect_success 'signoff: detect garbage in non-conforming footer' '
+test_expect_success 'signoff: tolerate garbage in conforming footer' '
 	append_signoff <<\EOF >actual &&
 subject
 
@@ -1383,8 +1382,36 @@ EOF
 8:
 10:
 13:Signed-off-by: C O Mitter <committer@example.com>
-14:
-15:Signed-off-by: C O Mitter <committer@example.com>
+EOF
+	test_cmp expected actual
+'
+
+test_expect_success 'signoff: respect trailer config' '
+	append_signoff <<\EOF >actual &&
+subject
+
+Myfooter: x
+Some Trash
+EOF
+	cat >expected <<\EOF &&
+4:Subject: [PATCH] subject
+8:
+11:
+12:Signed-off-by: C O Mitter <committer@example.com>
+EOF
+	test_cmp expected actual &&
+
+	test_config trailer.Myfooter.ifexists add &&
+	append_signoff <<\EOF >actual &&
+subject
+
+Myfooter: x
+Some Trash
+EOF
+	cat >expected <<\EOF &&
+4:Subject: [PATCH] subject
+8:
+11:Signed-off-by: C O Mitter <committer@example.com>
 EOF
 	test_cmp expected actual
 '
diff --git a/t/t7501-commit.sh b/t/t7501-commit.sh
index d84897a67..4003a27e6 100755
--- a/t/t7501-commit.sh
+++ b/t/t7501-commit.sh
@@ -460,6 +460,42 @@ $alt" &&
 	test_cmp expected actual
 '
 
+test_expect_success 'signoff respects trailer config' '
+
+	echo 5 >positive &&
+	git add positive &&
+	git commit -s -m "subject
+
+non-trailer line
+Myfooter: x" &&
+	git cat-file commit HEAD | sed -e "1,/^\$/d" > actual &&
+	(
+		echo subject
+		echo
+		echo non-trailer line
+		echo Myfooter: x
+		echo
+		echo "Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
+	) >expected &&
+	test_cmp expected actual &&
+
+	echo 6 >positive &&
+	git add positive &&
+	git -c "trailer.Myfooter.ifexists=add" commit -s -m "subject
+
+non-trailer line
+Myfooter: x" &&
+	git cat-file commit HEAD | sed -e "1,/^\$/d" > actual &&
+	(
+		echo subject
+		echo
+		echo non-trailer line
+		echo Myfooter: x
+		echo "Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
+	) >expected &&
+	test_cmp expected actual
+'
+
 test_expect_success 'multiple -m' '
 
 	>negative &&