[PATCH/RFC v2] Do not strip empty lines / trailing spaces from a commit message template

[Boris Faure <billiob@gmail.com>]

Templates should be just that: A form that the user fills out, and forms
have blanks. If people are attached to not having extra whitespace in the
editor, they can simply clean up their templates.

Added test with editor adding even more whitespace.

Signed-off-by: Boris Faure <billiob@gmail.com>
Based-on-patch-by:Sebastian Schuberth <sschuberth@gmail.com>
---
 builtin/commit.c                |    4 +++-
 t/t7500-commit.sh               |   14 ++++++++++++++
 t/t7500/add-whitespaced-content |    3 +++
 3 files changed, 20 insertions(+), 1 deletions(-)
 create mode 100755 t/t7500/add-whitespaced-content

diff --git a/builtin/commit.c b/builtin/commit.c
index 67757e9..411d5e4 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -615,6 +615,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	const char *hook_arg1 = NULL;
 	const char *hook_arg2 = NULL;
 	int ident_shown = 0;
+	int clean_message_contents = (cleanup_mode != CLEANUP_NONE);
 
 	if (!no_verify && run_hook(index_file, "pre-commit", NULL))
 		return 0;
@@ -681,6 +682,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		if (strbuf_read_file(&sb, template_file, 0) < 0)
 			die_errno(_("could not read '%s'"), template_file);
 		hook_arg1 = "template";
+		clean_message_contents = 0;
 	}
 
 	/*
@@ -708,7 +710,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	if (s->fp == NULL)
 		die_errno(_("could not open '%s'"), git_path(commit_editmsg));
 
-	if (cleanup_mode != CLEANUP_NONE)
+	if (clean_message_contents)
 		stripspace(&sb, 0);
 
 	if (signoff) {
diff --git a/t/t7500-commit.sh b/t/t7500-commit.sh
index 47096f9..dedbc0d 100755
--- a/t/t7500-commit.sh
+++ b/t/t7500-commit.sh
@@ -123,6 +123,20 @@ test_expect_success 'commit message from file should override template' '
 	commit_msg_is "standard input msg"
 '
 
+cat > "$TEMPLATE" << EOF
+
+
+### template
+
+EOF
+test_expect_success 'commit message from template with whitespace issue' '
+	echo "content galore" >> foo &&
+	git add foo &&
+	GIT_EDITOR="$TEST_DIRECTORY"/t7500/add-whitespaced-content git commit \
+		--template "$TEMPLATE" &&
+	commit_msg_is "commit message"
+'
+
 test_expect_success 'using alternate GIT_INDEX_FILE (1)' '
 
 	cp .git/index saved-index &&
diff --git a/t/t7500/add-whitespaced-content b/t/t7500/add-whitespaced-content
new file mode 100755
index 0000000..3d71c68
--- /dev/null
+++ b/t/t7500/add-whitespaced-content
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo -e "\n \ncommit message  	 \n\n" >> "$1"
+exit 0
-- 
1.7.5.1.217.g4e3aa.dirty