Merge pull request YahooArchive#48 from SOASTA/feature-pre-commit-hook

Feature pre commit hook 
Reviewed by: @cvazac @nicjansma

lib/pre-commit

@@ -0,0 +1,63 @@
+#!/bin/sh
+#
+# git pre-commit hook
+# 
+# This script should be copied into your local clones .git/hooks/
+# directory and made executable (`chmod +x`).
+#
+# After that, the script will run before every call to git commit and
+# check if grunt is installed and if `grunt lint` comes back successfully.
+
+
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+	against=HEAD
+else
+	# Initial commit: diff against an empty tree object
+	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+fi
+
+# If you want to allow non-ASCII filenames set this variable to true.
+allownonascii=$(git config --bool hooks.allownonascii)
+
+# Redirect output to stderr.
+exec 1>&2
+
+# Cross platform projects tend to avoid non-ASCII filenames; prevent
+# them from being added to the repository. We exploit the fact that the
+# printable range starts at the space character and ends with tilde.
+if [ "$allownonascii" != "true" ] &&
+	# Note that the use of brackets around a tr range is ok here, (it's
+	# even required, for portability to Solaris 10's /usr/bin/tr), since
+	# the square bracket bytes happen to fall in the designated range.
+	test $(git diff --cached --name-only --diff-filter=A -z $against |
+	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
+then
+	cat <<\EOF
+Error: Attempt to add a non-ASCII file name.
+
+This can cause problems if you want to work with people on other platforms.
+
+To be portable it is advisable to rename the file.
+
+If you know what you are doing you can disable this check using:
+
+  git config hooks.allownonascii true
+EOF
+	exit 1
+fi
+
+GIT_ROOT="$(git rev-parse --show-toplevel)"
+if [ ! -x $GIT_ROOT/node_modules/.bin/grunt ] || [ ! -x $(which grunt) ]; then
+	cat <<\EOF
+Error: You are trying to commit code or changes to the repository without the abillity to 
+lint or validate prior to commit.
+
+Please make sure you have grunt installed in your local or global path!
+
+EOF
+	exit 1
+fi
+
+GRUNT_EXEC=$(which grunt || $GIT_ROOT/node_modules/.bin/grunt)
+$GRUNT_EXEC --gruntfile $GIT_ROOT/Gruntfile.js lint