Git post-checkout and post-merge hooks to simplify bundling and other tasks.

git-bundle-hook.md

Make bundleing and npm installing easy

These git hooks runs bundle or npm install automatically whenever you:

• git checkout a new branch with a different Gemfile or package.json.
• git pull a change to Gemfile or package.json.

How to install

1. cd awesome_git_repo
2. curl -fL https://gist.githubusercontent.com/stefansundin/82051ad2c8565999b914/raw/install-hooks.sh | sh

How to uninstall

1. cd awesome_git_repo
2. rm .git/hooks/post-checkout .git/hooks/post-merge

install-hooks.sh

#!/bin/sh
# This script will install Git post-checkout and post-merge hooks that will automate your bundling other tasks.
# Install in current Git repo:
# curl -fL https://gist.githubusercontent.com/stefansundin/82051ad2c8565999b914/raw/install-hooks.sh | sh

# Uninstall:
# rm .git/hooks/post-checkout .git/hooks/post-merge
# in each repository that you've added this to.

GITROOT=`git rev-parse --show-toplevel 2> /dev/null`

echo
echo
 
if [ "$GITROOT" == "" ]; then
	echo This does not appear to be a git repo.
	exit 1
fi

if [ -f "$GITROOT/.git/hooks/post-checkout" ]; then
	echo There is already a post-checkout hook installed. Delete it first.
	echo
	echo "    rm '$GITROOT/.git/hooks/post-checkout'"
	echo
	exit 2
fi

if [ -f "$GITROOT/.git/hooks/post-merge" ]; then
	echo There is already a post-merge hook installed. Delete it first.
	echo
	echo "    rm '$GITROOT/.git/hooks/post-merge'"
	echo
	exit 3
fi

echo Downloading post-checkout and post-merge hooks from https://gist.github.com/stefansundin/82051ad2c8565999b914
echo

curl -L -o "$GITROOT/.git/hooks/post-checkout" https://gist.githubusercontent.com/stefansundin/82051ad2c8565999b914/raw/post-checkout
if [ ! -f "$GITROOT/.git/hooks/post-checkout" ]; then
  echo Error downloading post-checkout hook!
  exit 4
fi

curl -L -o "$GITROOT/.git/hooks/post-merge" https://gist.githubusercontent.com/stefansundin/82051ad2c8565999b914/raw/post-merge
if [ ! -f "$GITROOT/.git/hooks/post-merge" ]; then
  echo Error downloading post-merge hook!
  exit 5
fi

chmod +x "$GITROOT/.git/hooks/post-checkout" "$GITROOT/.git/hooks/post-merge"

echo "You're all set! Happy hacking!"

exit 0

post-checkout

#!/bin/bash
# Looks for changes to Gemfile[.lock] or package.json, and automates running bundle and other tasks.
# Does not run if your local branch is behind the remote.
# https://gist.github.com/stefansundin/82051ad2c8565999b914

# post-checkout hook - looks for changes to Gemfile[.lock] or package.json,
# when you change branches, and if found, reinstalls the given packages every

# Exit early if this was only a file checkout, not a branch change ($3 == 1)
[[ $3 == 0 ]] && exit 0

oldRef=$1
newRef=$2

# Exit early if the local branch is behind the remote
LOCAL=$(git rev-parse @)
REMOTE=$(git rev-parse @{u} 2> /dev/null)
BASE=$(git merge-base @ @{u} 2> /dev/null)

if [[ "$LOCAL" != "$REMOTE" && "$LOCAL" = "$BASE" ]]; then
  echo "You are behind origin, not running bundle/migrate post-checkout hook."
  exit 1
fi


function changed {
  git diff --name-only $oldRef $newRef | grep "^$1" > /dev/null 2>&1
}

if changed 'Gemfile.*'; then
  echo "Gemfile changed, bundling"
  bundle install
  [[ -d 'tmp' ]] && touch 'tmp/restart.txt'
fi

if changed 'bower.json'; then
  echo "bower.json changed, installing"
  bower install
fi

if changed 'db/migrate'; then
  echo "Migrations pending, migrating"
  bundle exec rake db:migrate RAILS_ENV=development
  bundle exec rake db:migrate RAILS_ENV=test
  # bundle exec rake db:migrate RAILS_ENV=production
  [[ -d 'tmp' ]] && touch 'tmp/restart.txt'
fi

if changed 'package.json'; then
  echo "Package.json changed, installing"
  npm install
fi

post-merge

#!/bin/bash
# Looks for changes to Gemfile[.lock] or package.json, and automates running bundle and other tasks.
# https://gist.github.com/stefansundin/82051ad2c8565999b914

function changed {
  git diff --name-only HEAD@{2} HEAD | grep "^$1" > /dev/null 2>&1
}

if changed 'Gemfile.*'; then
  echo "Gemfile changed, bundling"
  bundle install
  [[ -d 'tmp' ]] && touch 'tmp/restart.txt'
fi

if changed 'bower.json'; then
  echo "bower.json changed, installing"
  bower install
fi

if changed 'db/migrate'; then
  echo "Migrations pending, migrating"
  bundle exec rake db:migrate RAILS_ENV=development
  bundle exec rake db:migrate RAILS_ENV=test
  # bundle exec rake db:migrate RAILS_ENV=production
  [[ -d 'tmp' ]] && touch 'tmp/restart.txt'
fi

if changed 'package.json'; then
  echo "Package.json changed, installing"
  npm install
fi