Your lockfile, up to date, all the time

Usage no npm install needed!

<script type="module">
  import agDigitalGreenkeeperLockfile from 'https://cdn.skypack.dev/@ag-digital/greenkeeper-lockfile';



After enabling Greenkeeper for your repository you can use this package to make it work with lockfiles, such as npm-shrinkwrap.json, package-lock.json or yarn.lock.

example screenshot

Greenkeeper badge Build Status Dependency Status devDependency Status js-standard-style semantic-release

Package Managers

  • βœ… npm (including npm5)
  • βœ… yarn

CI Services

How does it work

  1. Detect whether the current CI build is caused by Greenkeeper
  2. Update the lockfile with the latest version of the updated dependency using the package manager’s built in mechanism
  3. Push a commit with the updated lockfile back to the Greenkeeper branch


First create a GitHub access token with push access to your repository and make it available to your CI's environment as GH_TOKEN.

If you use Travis CI, you may add the token using the CLI app as follows: travis encrypt GH_TOKEN=<token> --add

Configure your CI to use the npm/yarn version you want your lockfiles to be generated with before it installs your dependencies. Install greenkeeper-lockfile as well.

Configure your CI to run greenkeeper-lockfile-update right before it executes your tests and greenkeeper-lockfile-upload right after it executed your tests.

This is how it works on Travis CI for the different package managers.


# package-lock.json was introduced in npm@5
- npm install -g npm@5 # skip this if you are using node 9
- npm install -g greenkeeper-lockfile@1
before_script: greenkeeper-lockfile-update
after_script: greenkeeper-lockfile-upload


before_install: yarn global add greenkeeper-lockfile@1
before_script: greenkeeper-lockfile-update
after_script: greenkeeper-lockfile-upload

Custom yarn command line arguments

To run the lockfile-update script with custom command line arguments, set the GK_LOCK_YARN_OPTS environment variable to your needs (set it to --ignore-engines, for example). They will be appended to the yarn add command.

Testing multiple node versions

It is common to test multiple node versions and therefor have multiple test jobs for one build. In this case the lockfile will automatically be updated for every job, but only uploaded for the first one.

  - 6
  - 4
- npm install -g npm
- npm install -g greenkeeper-lockfile@1
before_script: greenkeeper-lockfile-update
# Only the node version 6 job will upload the lockfile
after_script: greenkeeper-lockfile-upload

CircleCI workflows

In order to use greenkeeper-lockfile with CircleCI workflows, it must be in the first job run. Use sequential job execution to ensure the job that runs greenkeeper-lockfile is always executed first. For example, if greenkeeper-lockfile is run in the lockfile job, all other jobs in the workflow must require the lockfile job to finish before running:

  version: 2
      - lockfile
      - job1:
            - lockfile

Contributing a CI Service

Environment information

In order to support a CI service this package needs to extract some information from the environment.

  • repoSlug The GitHub repo slug e.g. greenkeeper/greenkeeper-lockfile
  • branchName The name of the current branch e.g. greenkeeper/lodash-4.0.0
  • firstPush Is this the first push on this branch i.e. the Greenkeeper commit
  • correctBuild Is this a regular build (not a pull request for example)
  • uploadBuild Should the lockfile be uploaded from this build (relevant for testing multiple node versions)

Have a look at our Travis CI reference implementation.

Detecting your service

Write a test that returns whether this package runs in your CI service’s environment and add it to our ci-services/tests.

Testing your service

In order to test this plugin with your own CI service install your fork directly from git.

+ npm i -g you/greenkeeper-lockfile#my-ci
- npm i -g greenkeeper-lockfile@1

We are looking forward to your contributions πŸ’– Don’t forget to add your CI service to the list at the top of this file.