yarnhook keeps your node_modules up-to-date when your yarn.lock, package-lock.json or shrinkwrap.yaml changes due to git operations like checkout, merge, rebase, pull etc.

You can install yarnhook to your project with mrm.

npx mrm yarnhook

This package should be used with husky.

yarn add --dev yarnhook husky
# or
npm install --save-dev yarnhook husky
# or
pnpm install --save-dev yarnhook husky

You should let yarnhook handle git hooks that change the dependencies. Example package.json is as follows:

{
  "husky": {
    "hooks": {
      "post-checkout": "yarnhook",
      "post-merge": "yarnhook",
      "post-rewrite": "yarnhook"
    }
  }
}

Prepend these flags to your git command to use them.

• YARNHOOK_BYPASS: Run git command bypassing yarnhook completely
• YARNHOOK_DEBUG: Print debug information
• YARNHOOK_DRYRUN: Don't install dependencies, only notify

An example:

YARNHOOK_BYPASS=true git checkout feature-branch

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