[PATCH 1/2] Allow to override mergetool.prompt with $GIT_MERGETOOL*_PROMPT

[Sebastian Schuberth <sschuberth@gmail.com>]

This is for symmetry with git-difftool, and to make should_prompt_merge ()
reusable from within git-difftool--helper.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
---
 git-mergetool--lib.sh |    9 +++++++++
 git-mergetool.sh      |    3 ++-
 2 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
index 5b62785..16b0343 100644
--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh
@@ -7,6 +7,15 @@ merge_mode() {
 	test "$TOOL_MODE" = merge
 }
 
+should_prompt_merge () {
+	local prompt=$(git config --bool mergetool.prompt || echo true)
+	if test "$prompt" = true; then
+		test -z "$GIT_MERGETOOL_NO_PROMPT"
+	else
+		test -n "$GIT_MERGETOOL_PROMPT"
+	fi
+}
+
 translate_merge_tool_path () {
 	case "$1" in
 	vimdiff)
diff --git a/git-mergetool.sh b/git-mergetool.sh
index b52a741..d453cb0 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -202,7 +202,8 @@ merge_file () {
     return 0
 }
 
-prompt=$(git config --bool mergetool.prompt || echo true)
+should_prompt_merge
+prompt=$?
 
 while test $# != 0
 do
-- 
1.6.5.1.1373.g71d1