.git/hook/pre-commit

gistfile1.sh

#!/bin/sh
#
# Run npm shrinkwrap on every commit, make sure we have the most recent
# dependencies checked into git.

DEPTH=10 # Set this to N to include more descendants in shrinkwrap
PATH=/usr/local/bin:$PATH

# Success or error, npm shrinkwrap will output to both stdout and stderr.
# We're only interested in what stderr has to say when it fails.
npm prune > /dev/null
error=$(npm shrinkwrap --depth=$DEPTH 2>&1 > /dev/null)
if [[ $? -ne 0 ]] ; then
  echo -e "$error"
  exit 1
fi

# If modified, adds file, will be included in commit.
diff=$(git diff npm-shrinkwrap.json)
if [[ -n "$diff" ]] ; then
  echo "Updated npm-shrinkwrap.json"
  git add npm-shrinkwrap.json
fi