post-merge

#/usr/bin/env bash
# MIT © Sindre Sorhus - sindresorhus.com

# git hook to run a command after `git pull` if a specified file was changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

check_run() {
	echo "$changed_files" | grep --quiet "$1" && eval "$2"
}

# run `yarn` if package.json changed
check_run package.json "yarn"

# run `yarn` if yarn.lock changed
check_run yarn.lock "yarn"

# run `bundle install` if Gemfile.lock changed
check_run Gemfile.lock "bundle install"

# run `yarn build:client` if any JS code was updated
check_run app/javascript "yarn build:client"