post-merge-with-yarn

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

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

changed_files="$(git diff-tree -r --name-only --no-commit-id HEAD@{1} HEAD)"

check_run() {
	echo "$changed_files" | grep --quiet "$1" && echo " * changes detected in $1" && echo " * running $2" && eval "$2"
}
 
# Example usage
# In this example it's used to run `yarn install && npm prune` if package.json changed.
# Last check yarn was not handling pruning properly. It may be fixed but calling npm prune shouldn't hurt
check_run package.json "yarn install && npm prune"

# Run an npm build script (controlled in package.json)
npm run build-client