Force jshint validation with pre-commit hook (bash)

gistfile1.sh

#!/bin/sh
# Run changed javascript files through jshint before commiting and prevent bad
# code from being committed.
# If you need to prevent newly added js from being checked because its in a
# library like bower_components, add a .jshintignore file and list the directory
# INSTALL: Add as a file in your repo as .git/hooks/pre-commit

FILES=$(git diff --cached --name-only --diff-filter=ACM| grep ".js$")
if [ "$FILES" = "" ]; then
  exit 0
fi

echo "\nValidating changed js files..."

pass=true
for file in ${FILES}; do
  result=$(jshint ${file})
  if [ "$result" != "" ]; then
    echo 'failed\n'
    echo "$result"
    pass=false
  fi
done

if ! $pass; then
  exit 1
else
  echo 'passed\n'
  exit 0
fi

+1 for linting the actual staged content. Had this become a problem in the past, where people would stage a broken change, fix it but fail to commit, and then push the broken change. Very frustrating.