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code-server/lib/vscode/extensions/json-language-features/CONTRIBUTING.md

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## Setup
- Clone [microsoft/vscode](https://github.com/microsoft/vscode)
- Run `yarn` at `/`, this will install
- Dependencies for `/extension/json-language-features/`
- Dependencies for `/extension/json-language-features/server/`
- devDependencies such as `gulp`
- Open `/extensions/json-language-features/` as the workspace in VS Code
- Run the [`Launch Extension`](https://github.com/microsoft/vscode/blob/master/extensions/json-language-features/.vscode/launch.json) debug target in the Debug View. This will:
- Launch the `preLaunchTask` task to compile the extension
- Launch a new VS Code instance with the `json-language-features` extension loaded
- You should see a notification saying the development version of `json-language-features` overwrites the bundled version of `json-language-features`
- Open a `.json` file to activate the extension. The extension will start the JSON language server process.
- Add `"json.trace.server": "verbose"` to the settings to observe the communication between client and server.
- Debug the language server process by using `Attach to Node Process` command in the VS Code window opened on `json-language-features`
- Run `Reload Window` command in the launched instance to reload the extension
### Contribute to vscode-json-languageservice
[microsoft/vscode-json-languageservice](https://github.com/microsoft/vscode-json-languageservice) is the library that implements the language smarts for JSON.
The JSON language server forwards most the of requests to the service library.
If you want to fix JSON issues or make improvements, you should make changes at [microsoft/vscode-json-languageservice](https://github.com/microsoft/vscode-json-languageservice).
However, within this extension, you can run a development version of `vscode-json-languageservice` to debug code or test language features interactively:
#### Linking `vscode-json-languageservice` in `json-language-features/server/`
- Clone [microsoft/vscode-json-languageservice](https://github.com/microsoft/vscode-json-languageservice)
- Run `npm install` in `vscode-json-languageservice`
- Run `npm link` in `vscode-json-languageservice`. This will compile and link `vscode-json-languageservice`
- In `json-language-features/server/`, run `yarn link vscode-json-languageservice`
#### Testing the development version of `vscode-json-languageservice`
- Open both `vscode-json-languageservice` and this extension in a single workspace with [multi-root workspace](https://code.visualstudio.com/docs/editor/multi-root-workspaces) feature
- Run `yarn watch` at `json-languagefeatures/server/` to recompile this extension with the linked version of `vscode-json-languageservice`
- Make some changes in `vscode-json-languageservice`
- Now when you run `Launch Extension` debug target, the launched instance will use your development version of `vscode-json-languageservice`. You can interactively test the language features.