AustinDizzy · July 12, 2015 04:47 · Jul 12, 2015
diff --git a/pre-commit b/pre-commit
@@ -0,0 +1,47 @@
+#!/bin/sh
+# Modified 2015, Austin Dizzy
+# Copyright 2012 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# git gofmt pre-commit hook
+#
+# To use, store as .git/hooks/pre-commit inside your repository and make sure
+# it has execute permissions.
+#
+# This script does not handle file names that contain spaces.
+
+gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '.go$')
+[ -z "$gofiles" ] && exit 0
+
+unformatted=$(gofmt -l $gofiles)
+[ -z "$unformatted" ] && exit 0
+
+# Some files are not gofmt'd. Print message and fail.
+
+echo >&2 "The following Go files are not gofmt'd:"
+for fn in $unformatted; do
+	echo >&2 "  [*] $fn"
+done
+
+exec < /dev/tty
+
+read -p "Would you like to gofmt them? (Y/n) " yn
+if [ "$yn" = "" ]; then
+yn='Y'
+fi
+case $yn in
+  [Yy]) 
+    for fn in $unformatted; do
+        eval "gofmt -w $PWD/$fn"
+        eval "git add $PWD/$fn"
+    done
+    ;;
+  [Nn]) exit 0
+    ;;
+  * ) echo "Please answer y or n for yes or no.";;
+esac
+
+exec <&-
+
+exit 0