hook.sh

#!/bin/bash
#
# Check changed js files using jshint and jscs
#

PATCH_FILE="working-tree.patch"
NPM_BIN="./node_modules/.bin"

function cleanup {
    exit_code=$?
    if [ -f "$PATCH_FILE" ]; then
        patch -p0 < "$PATCH_FILE"
        rm "$PATCH_FILE"
    fi
    exit $exit_code
}

trap cleanup EXIT SIGINT SIGHUP

# Cancel any changes to the working tree that are not going to be committed
git diff --no-prefix > "$PATCH_FILE"
git checkout -- .

git_cached_files=$(git diff --cached --name-only --diff-filter=ACMR | grep -e \.js$ -e \.bemhtml$ -e \.bemtree$ | xargs echo)
if [ "$git_cached_files" ]; then
    $NPM_BIN/jshint-groups $git_cached_files || exit 1
    $NPM_BIN/jscs $git_cached_files || exit 1
fi