103 lines
2.7 KiB
Markdown
103 lines
2.7 KiB
Markdown
# actions-languageservice
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This package contains the logic for the GitHub Actions workflows language server.
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## Installation
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The [package](https://www.npmjs.com/package/@actions/languageservice) contains TypeScript types and compiled ECMAScript modules.
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```bash
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npm install @actions/languageservice
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```
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## Usage
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### Basic usage
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#### Concepts
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The language service features use three sources of information:
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* a built-in static schema for the workflow YAML file
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* _value providers_ which can dynamically add values to the schema, for example, the list of available labels for a repository when validating `runs-on`.
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* _context providers_ which can dynamically provide available contexts used in [expressions](https://docs.github.com/actions/reference/context-and-expression-syntax-for-github-actions#about-contexts-and-expressions). For example, the contents of the `github.event` context for a given workflow file.
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##### Value Providers
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TODO
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##### Context Providers
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TODO
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#### Validation
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Validate a workflow file, returns an array of [`Diagnostic`](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#diagnostic) objects.
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```typescript
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const config: ValidationConfig = {
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valueProviderConfig: valueProviders(sessionToken, repoContext, cache),
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contextProviderConfig: contextProviders(sessionToken, repoContext, cache),
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};
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const result = await validate(textDocument, config); // result is an array of `Diagnostic`
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```
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#### Hover
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Get information when [hovering](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_hover) over a token in the workflow file.
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```typescript
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import {hover} from "@actions/languageservice";
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const document = {
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uri: "file:///path/to/file",
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getText: () => "on: push\n jobs:\n build:\n runs-on: ubuntu-latest\n steps:\n - run: echo hello"
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};
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const hover = await hover(document, {line: 0, character: 1}); // { contents: { kind: "markdown", value: "The event that triggers the workflow" } }
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```
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#### Auto-completion
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TODO
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## Contributing
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See [CONTRIBUTING.md](../CONTRIBUTING.md) at the root of the repository for general guidelines and recommendations.
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If you do want to contribute, please run [prettier](https://prettier.io/) to format your code and add unit tests as appropriate before submitting your PR.
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### Build
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```bash
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npm run build
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```
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or to watch for changes
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```bash
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npm run watch
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```
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### Test
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```bash
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npm test
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```
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or to watch for changes and run tests:
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```bash
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npm run test-watch
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```
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### Lint
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```bash
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npm run format-check
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```
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## License
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This project is licensed under the terms of the MIT open source license. Please refer to [MIT](../LICENSE) for the full terms. |