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59 lines
3.1 KiB
Markdown
59 lines
3.1 KiB
Markdown
# 0. Caching dependencies
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Date: 2021-05-21
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Status: Accepted
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# Context
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`actions/setup-node` is the 2nd most popular action in GitHub Actions. A lot of customers use it in conjunction with [actions/cache](https://github.com/actions/cache) to speed up dependencies installation.
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See more examples on proper usage in [actions/cache documentation](https://github.com/actions/cache/blob/main/examples.md#node---npm).
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# Goals & Anti-Goals
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Integration of caching functionality into `actions/setup-node` action will bring the following benefits for action users:
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- Decrease the entry threshold for using the cache for Node.js dependencies and simplify initial configuration
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- Simplify YAML pipelines because no need additional steps to enable caching
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- More users will use cache for Node.js so more customers will have fast builds!
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We will add support for NPM and Yarn dependencies caching.
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As the first stage, we won't support custom locations for `package-lock.json`, `yarn.lock` files and action will work only when files are located in repository root.
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We don't pursue the goal to provide wide customization of caching in scope of `actions/setup-node` action. The purpose of this integration is covering ~90% of basic use-cases. If user needs flexible customization, we should advice them to use `actions/cache` directly.
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# Decision
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- Add `cache` input parameter to `actions/setup-node`. For now, input will accept the following values:
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- `npm` - enable caching for npm dependencies
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- `yarn` - enable caching for yarn dependencies
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- `''` - disable caching (default value)
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- Cache feature will be disabled by default to make sure that we don't break existing customers. We will consider enabling cache by default in next major release (`v3`)
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- Action will try to search `package-lock.json` or `yarn.lock` (npm 7.x supports `yarn.lock` files) files in the repository root and throw error if no one is found
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- The hash of found file will be used as cache key (the same approach like [actions/cache](https://github.com/actions/cache/blob/main/examples.md#node---npm) recommends)
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- The following key cache will be used `${{ runner.os }}-npm-${{ hashFiles('<package-lock-path>') }}`
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- Action will cache global cache:
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- Npm (retrieved via `npm config get cache`)
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- Yarn 1 (retrieved via `yarn cache dir`)
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- Yarn 2 (retrieved via `yarn config get cacheFolder`)
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# Example of real use-cases
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Npm package manager:
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```yml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-node@v2
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with:
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node-version: '14'
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cache: npm
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```
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Yarn package manager:
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```yml
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-node@v2
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with:
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node-version: '14'
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cache: yarn
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```
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# Release process
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As soon as functionality is implemented, we will release minor update of action. No need to bump major version since there are no breaking changes for existing users.
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After that, we will update [starter-workflows](https://github.com/actions/starter-workflows/blob/main/ci/node.js.yml) and [GitHub Action documentation](https://docs.github.com/en/actions/guides/building-and-testing-nodejs#example-caching-dependencies).
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