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yomichan/CONTRIBUTING.md

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Issues and Features

Issues reported on GitHub should include information about:

  • What the problem, question, or request is.
  • What browser is being used.
  • What version of Yomichan is being used.
  • If applicable, an export of the settings file.

Development

Contributions are welcome from any developers who would like to help out. Below are a few guidelines to ensure contributions have a good level of quality and consistency:

  • Open GitHub issues to discuss large features before writing code.
  • Follow the conventions and style of the existing code.
  • Test changes using the continuous integration tests included in the repository.
  • Write clean, modern ES6 code (const/let, async/await, arrow functions, etc.)
  • Large pull requests without a clear scope will not be merged.
  • Incomplete or non-standalone features will not be merged.

Setup

Yomichan uses Node.js and npm tools for building and testing. After installing these Node.js, the development environment can be set up by running npm ci.

Testing

Unit tests, integration tests, and various other tests can be executed by running npm test. Other individual tests can be looked up in the package.json file, and the source for specific tests can be found in the test directory

Building

By default, the development repository is configured for Chrome, and the ext directory can be directly loaded as an unpacked extension by Chrome. This way, development does not require any additional build steps, and most changes will be automatically updated by the browser. Depending on what files were changed, the extension may sometimes need to be reloaded before the changes take effect.

There are two scripts to build the extension to a packaged file for various build targets:

Both of these files are convenience scripts which invoke node dev/build.js. The build script can produce several different build files based on manifest configurations defined in manifest-variants.json. Several command line arguments are available for these scripts:

  • [target] - Builds a specific target.
  • --all - Builds all targets specified in manifest-variants.json.
  • --default - Restores the default manifest file.
  • --manifest <target> - Overwrites ext/manifest.json with the manifest variant for the specified build target.
  • --dry-run - Runs the full build process (excluding zip building), checking that the configuration is valid.
  • --dry-run-build-zip - If --dry-run is also specified, zip building will also be performed in memory; no files are created.

If no arguments are specified, the command is equivalent to build.bat --all.

Build Tools

The build process can use the 7-zip archiving tool to create the packed zip builds if the 7-zip executable (either 7z or 7za) is found in the PATH environment variable. Otherwise, the JSZip API is used to generate the files. 7-zip typically provides better compression than JSZip, but the files are otherwise equivalent.

Manifest

Manifest variants for different build targets are specified in manifest-variants.json. This file is used to overwrite the manfiest.json file included in the extension. By default, this manifest should be the default chrome manifest, and changes to manfiest.json should not be committed unless there is a corresponding change in manifest-variants.json. There is a continuous integration test which validates this, and the default manifest can be restored by running build.bat --default.

Style

Linting rules are defined for a few types of files, and validation is performed as part of the standard tests run by npm test and the continuous integration process.