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Langium VS Code Extension

Welcome to your Langium VSCode extension. This folder contains all necessary files for your language extension.

What's in the folder?

  • package.json - The manifest file in which you declare your language support.
  • tsconfig.json - The packages specific TypeScript compiler configuration extending the base config.
  • esbuild.mjs - Configuration file for esbuild that is used to create the VSCode extension bundle.
  • language-configuration.json - the language configuration used in the VS Code editor, defining the tokens that are used for comments and brackets.
  • src/language/main.ts - The entry point of the language server process.
  • src/extension/main.ts - The main code of the extension, which is responsible for launching a language server and client.

Get up and running straight away

  • Run npm run langium:generate to generate TypeScript code from the grammar definition.
  • Run npm run build to compile all TypeScript code.
  • Press F5 to open a new window with your extension loaded.
  • Create a new file with a file name suffix matching your language.
  • Verify that syntax highlighting, validation, completion etc. are working as expected.

Make changes

  • Run npm run watch to have the TypeScript compiler run automatically after every change of the source files.
  • Run npm run langium:watch to have the Langium generator run automatically after every change of the grammar declaration.
  • You can relaunch the extension from the debug toolbar after making changes to the files listed above.
  • You can also reload (Ctrl+R or Cmd+R on Mac) the VS Code window with your extension to load your changes.

Install your extension

  • To start using your extension with VS Code, copy it into the <user home>/.vscode/extensions folder and restart Code.
  • To share your extension with the world, read the VS Code documentation about publishing an extension.

To Go Further

Documentation about the Langium framework is available at https://langium.org