add Git hooks

Author: JoshMcCullough

.bin/git/hooks-wrapper

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Runs all executable pre-commit-* hooks and exits after,
+# if any of them was not successful.
+#
+# Based on
+# https://github.com/ELLIOTTCABLE/Paws.js/blob/Master/Scripts/git-hooks/chain-hooks.sh
+# http://osdir.com/ml/git/2009-01/msg00308.html
+#
+# assumes your scripts are located at <repo-root>/bin/git/hooks
+
+exitcodes=()
+hookname=`basename $0`
+# our special hooks folder
+CUSTOM_HOOKS_DIR=$(git rev-parse --show-toplevel)/bin/git/hooks
+# find gits native hooks folder
+NATIVE_HOOKS_DIR=$(git rev-parse --show-toplevel)/.git/hooks
+
+# Run each hook, passing through STDIN and storing the exit code.
+# We don't want to bail at the first failure, as the user might
+# then bypass the hooks without knowing about additional issues.
+
+for hook in $CUSTOM_HOOKS_DIR/$(basename $0)-*; do
+    test -x "$hook" || continue
+
+    echo "Running custom hook '$hookname' ..."
+    out=`$hook "$@"`
+    exitcodes+=($?)
+    echo "$out"
+done
+
+# check if there was a local hook that was moved previously
+if [ -f "$NATIVE_HOOKS_DIR/$hookname.local" ]; then
+    echo "Running native hook '$hookname' ..."
+    out=`$NATIVE_HOOKS_DIR/$hookname.local "$@"`
+    exitcodes+=($?)
+    echo "$out"
+fi
+
+# If any exit code isn't 0, bail.
+for i in "${exitcodes[@]}"; do
+    [ "$i" == 0 ] || exit $i
+done

.bin/git/hooks/pre-push-build-and-test

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+REPO_ROOT_DIR=$(git rev-parse --show-toplevel)
+CHANGE_COUNT=$(cd ${REPO_ROOT_DIR}; git diff --name-only origin/HEAD..HEAD -- resources/ src/ test/ Dockerfile scripts.sh |wc -l)
+
+if [[ "0" -ne "${CHANGE_COUNT}" ]]; then
+	(cd ${REPO_ROOT_DIR}; ./scripts.sh rebuild_nginx rebuild_test_runner test)
+else
+  HOOK_NAME=$(basename $0)
+
+	echo "Skipping hook '${HOOK_NAME}' -- no changes detected which would require tests to be run."
+fi

.bin/git/init-hooks

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# based on http://stackoverflow.com/a/3464399/1383268
+# assumes that the hooks-wrapper script is located at <repo-root>/bin/git/hooks-wrapper
+
+HOOK_NAMES="applypatch-msg pre-applypatch post-applypatch pre-commit prepare-commit-msg commit-msg post-commit pre-rebase post-checkout post-merge pre-receive update post-receive post-update pre-auto-gc pre-push"
+# find git's native hooks folder
+REPO_ROOT_DIR=$(git rev-parse --show-toplevel)
+HOOKS_DIR=$(git rev-parse --show-toplevel)/.git/hooks
+
+for hook in $HOOK_NAMES; do
+    # If the hook already exists, is a file, and is not a symlink
+    if [ ! -h $HOOKS_DIR/$hook ] && [ -f $HOOKS_DIR/$hook ]; then
+        mv $HOOKS_DIR/$hook $HOOKS_DIR/$hook.local
+    fi
+    # create the symlink, overwriting the file if it exists
+    # probably the only way this would happen is if you're using an old version of git
+    # -- back when the sample hooks were not executable, instead of being named ____.sample
+    ln -s -f $REPO_ROOT_DIR/bin/git/hooks-wrapper $HOOKS_DIR/$hook
+done

.bin/init

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+source $(dirname $0)/git/init-hooks

README.md

@@ -144,4 +144,4 @@ auth_jwt_validate_email off;
 
 ## Contributing
 
-If you'd like to contribute to this repository, please first initiate the Git hooks by running `./bin/init` -- this will ensure that tests are run before you push your changes.
+If you'd like to contribute to this repository, please first initiate the Git hooks by running `./.bin/init` (note the `.` before `bin`) -- this will ensure that tests are run before you push your changes.