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Change Log of langium-cli

v3.2.0 (Sep. 2024)

Fixed an undefined error on certain regexes in the monarch generator (#1594).

v3.1.0 (Jun. 2024)

Fixed string escaping for generated code (#1537, #1514).

v3.0.2 (Apr. 2024)

Exported the textmate syntax highlighting under langium-cli/textmate. This enables importing the highlighting code for the Langium playground.

v3.0.1 (Feb. 2024)

Fixed a minor issue related to generated code for projects that don't use the langium/lsp import (#1393).

v3.0.0 (Feb. 2024)

Some adjustments of the generated code due to the LSP bundling changes in Langium. For further information, see here.

v2.0.1 (Aug. 2023)

Fix a bug that prevented usage of the JS API of the CLI package (#1160).

v2.0.0 (Aug. 2023)

EcmaScript Modules (ESM)

This package is now compiling to ESM only, refer to this changelog entry

Breaking Changes

  • The CLI now always uses the original projectName of the langium-config.json property for the generated type/object names. It no longer performs kebab-case transformation (#1122).
  • We've decided to remove generated $container type declarations for types where it isn't clear what the container types can be (#1055).

v1.3.0 (Aug. 2023)

Railroad Syntax Diagrams

With the introduction of langium-railroad, the CLI is now capable of generating railroad syntax diagrams for your language (#1075). To generate them to a file, use the following example config:

{
    ...
    "languages": [{
        ...
        "railroad": {
            "out": "docs/syntax-diagram.html"
        }
    }],
    ...
}

Note The vscode extension for Langium contributes the Show Railroad Syntax Diagram command to show this HTML in a webview.

Generated Terminal Definitions

The generated ast.ts file will now also contain an object containing all regular expressions used by your grammar's terminal rules (#1097). This allows to more easily reuse those regular expressions in your code.

General Improvements

  • The CLI can now resolve grammar imports transitively (#1113).
  • A new mode configuration/argument can be used to improve bundle size of Langium projects (#1077).
  • Fixed an error in the way the CLI creates directories (#1105).

v1.2.1 (Jun. 2023)

  • The generated code now performs split imports for runtime and compile time dependencies (#1018).
  • The new configuration field importExtension can be used to specify the file extension for generated imports (#1072).

v1.2.0 (May. 2023)

Prism Generator

The Langium CLI now features a generator for the prism syntax highlighter. The syntax highlighting for the Langium documentation is already making use of a generated prism.js file.

Enable the generator by adding it to your langium-config.json file:

{
    ...
    "languages": [{
        ...
        "prism": {
            "out": "syntax/prism.js"
        }
    }],
    ...
}

General Improvements

v1.1.0 (Feb. 2023)

  • Various improvements to the generated AST types (#845).
  • The --watch mode now also watches referenced grammars, not only those directly used in the langium config file (#908).

v1.0.0 (Dec. 2022) 🎉

  • New command extract-types generates type declarations to be used in your grammar file (#754). This utility can be used to move from inferred types to declared types, which makes sense when your language project becomes more mature.
  • New reference format in JSON-serialized grammars (#787).
  • Adapted to version 1.0.0 of the Langium core library.

v0.5.0 (Oct. 2022)

  • Added an option to generate syntax highlighting in the Monarch format (#620).
  • Adapted to version 0.5.0 of the Langium core library.

v0.4.0 (Jun. 2022)

This release brings lots of bug fixes and is adapted to version 0.4.0 of the Langium core library.

v0.3.0 (Mar. 2022)

General Improvements

  • Added support for importing other grammar files to state explicitly which rules should be included in your grammar (#311).
  • Added support for explicit type declarations in the grammar (#406).
  • Improved generated TextMate syntax highlighting (#289, #293, #312).
  • Added support for case-insensitive parsing of keywords (#316).
  • When parser validation errors occur, the file path and line number of the corresponding grammar rule is printed out (#372).

Breaking Changes

  • In order to support multiple languages running in the same language server, the Langium configuration format was changed (#311). It now looks like this: 
    {
  "projectName": "Arithmetics",
  "languages": [{
    "id": "arithmetics",
    "grammar": "src/language-server/arithmetics.langium",
    "fileExtensions": [".calc"],
    "textMate": {
      "out": "syntaxes/arithmetics.tmLanguage.json"
    }
  }],
  "out": "src/language-server/generated"
}
    The languages array accepts multiple language configurations, which are then all generated at once.

v0.2.0 (Nov. 2021)

General Improvements

  • We no longer generate code for the parser, but derive it from the serialized grammar instead (#169).
  • The target folder is deleted before new files are generated (#180). In case the target folder contains any files that are not regenerated, the CLI shows a question before deleting anything.
  • The language configuration used by langium-cli is now read from a separate file langium-config.json by default (#158). Embedding it in package.json is still supported.
  • Added the Chevrotain parser configuration to the Langium configuration (chevrotainParserConfig property, #248). Among other things, this enables setting the maximum lookahead.
  • The parser validation of Chevrotain is run as part of langium-cli to provide early feedback (#253).
  • The JSON content of the grammar is written to a TypeScript file instead of a .json file, simplifiying the build process (#142).
  • Some of the language meta data (language id and file extensions) are generated so they are available at runtime (#170).

Breaking Changes

  • The extensions field in the Langium configuration was renamed to fileExtensions (#173).