Add git-what-the-hell-just-happened

Author: unixorn

bin/git-what-the-hell-just-happened

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Originally from Gary Bernhardt's dotfiles
+# https://github.com/garybernhardt/dotfiles/blob/master/bin/git-what-the-hell-just-happened
+
+set -e
+
+ref=${1:-"HEAD"}
+
+old=$ref@{1}
+new=$ref
+
+log() {
+    git log --graph --pretty=short -1 $1
+}
+
+echo "Old revision:"
+log $old
+echo
+echo "New revision:"
+log $new
+echo
+echo "Changes:"
+git diff --stat --summary $new $old