This repository uses lerna to manage Gutenberg modules and publish them as packages to npm.

When creating a new package, you need to provide at least the following:

1. package.json based on the template:

   {
   	"name": "@wordpress/package-name",
   	"version": "1.0.0-beta.0",
   	"description": "Package description.",
   	"author": "The WordPress Contributors",
   	"license": "GPL-2.0-or-later",
   	"keywords": [
   		"wordpress"
   	],
   	"homepage": "https://github.com/WordPress/gutenberg/tree/master/packages/package-name/README.md",
   	"repository": {
   		"type": "git",
   		"url": "https://github.com/WordPress/gutenberg.git"
   	},
   	"bugs": {
   		"url": "https://github.com/WordPress/gutenberg/issues"
   	},
   	"main": "build/index.js",
   	"module": "build-module/index.js",
   	"react-native": "src/index",
   	"dependencies": {
   		"@babel/runtime": "^7.0.0"
   	},
   	"publishConfig": {
   		"access": "public"
   	}
   }

   This assumes that your code is located in the src folder and will be transpiled with Babel.
2. .npmrc file which disables creating package-lock.json file for the package:

   package-lock=false
   

3. README.md file containing at least:
   • Package name
   • Package description
   • Installation details
   • Usage example
   • Code is Poetry logo (<br/><br/><p align="center"><img src="https://s.w.org/style/images/codeispoetry.png?1" alt="Code is Poetry." /></p>)

Maintaining dozens of npm packages is difficult—it can be tough to keep track of changes. That's why we use CHANGELOG.md files for each package to simplify the release process. All packages should follow the Semantic Versioning (semver) specification.

The developer who proposes a change (pull request) is responsible for choosing the correct version increment (major, minor, or patch) according to the following guidelines:

• Major version X (X.y.z | X > 0) should be changed with any backward incompatible/"breaking" change. This will usually occur at the final stage of deprecating and removing of a feature.
• Minor version Y (x.Y.z | x > 0) should be changed when you add functionality or change functionality in a backward compatible manner. It must be incremented if any public API functionality is marked as deprecated.
• Patch version Z (x.y.Z | x > 0) should be incremented when you make backward compatible bug fixes.

When in doubt, refer to Semantic Versioning specification.

Example:

## v1.2.2 (Unreleased)

### Bug Fix

- ...
- ...

• If you need to add something considered a bug fix, you add the item to Bug Fix section and leave the version as 1.2.2.
• If it's a new feature, you add the item to New Feature section and change version to 1.3.0.
• If it's a breaking change you want to introduce, add the item to Breaking Change section and bump the version to 2.0.0.
• If you struggle to classify a change as one of the above, then it might be not necessary to include it.

The version bump is only necessary if one of the following applies:

• There are no other unreleased changes.
• The type of change you're introducing is incompatible (more severe) than the other unreleased changes.

Lerna automatically releases all outdated packages. To check which packages are outdated and will be released, type npm run publish:check.

If you have the ability to publish packages, you must have 2FA enabled on your npm account.

Confirm that you're logged in to npm, by running npm whoami. If you're not logged in, run npm adduser to login.

If you're publishing a new package, ensure that its package.json file contains the correct publishConfig settings:

{
	"publishConfig": {
		"access": "public"
	}
}

You can check your package configs by running npm run lint-pkg-json.

Run the following command to release a dev version of the outdated packages, replacing 123456 with your 2FA code. Make sure you're using a freshly generated 2FA code, rather than one that's about to timeout. This is a little cumbersome but helps to prevent the release process from dying mid-deploy.

NPM_CONFIG_OTP=123456 npm run publish:dev

Lerna will ask you which version number you want to choose for each package. For a dev release, you'll more likely want to choose the "prerelease" option. Repeat the same for all the outdated packages and confirm your version updates.

Lerna will then publish to npm, commit the package.json changes and create the git tags.

To release a production version for the outdated packages, run the following command, replacing 123456 with your (freshly generated, as above) 2FA code:

NPM_CONFIG_OTP=123456 npm run publish:prod

Choose the correct version based on CHANGELOG.md files, confirm your choices and let Lerna do its magic.