openapi-generator/CONTRIBUTING.md

Guidelines For Contributing

Before submitting an issue

• Search the open issue and closed issue to ensure no one else has reported something similar before.
• The issue should contain details on how to repeat the issue, e.g.
  • the OpenAPI Spec for reproducing the issue (💡 use Gist to share). If the OpenAPI Spec cannot be shared publicly, it will be hard for the community to help
  • version of Swagger Codegen
  • language (-l in the command line, e.g. java, csharp, php)
• You can also make a suggestion or ask a question by opening an "issue"

Before submitting a PR

• Search the open issue to ensure no one else has reported something similar and no one is actively working on similar proposed change.
• If no one has suggested something similar, open an "issue" with your suggestion to gather feedback from the community.

How to contribute

Code generators

All the code generators can be found in modules/swagger-codegen/src/main/java/io/swagger/codegen/languages

Templates

All the templates (mustache) can be found in modules/swagger-codegen/src/main/resources.

For a list of variables available in the template, please refer to this page

Style guide

Code change should conform to the programming style guide of the respective langauages:

• C#: https://msdn.microsoft.com/en-us/library/vstudio/ff926074.aspx
• Java: https://google.github.io/styleguide/javaguide.html
• JavaScript - https://github.com/airbnb/javascript/tree/master/es5
• ObjC: https://github.com/NYTimes/objective-c-style-guide
• PHP: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
• Python: https://www.python.org/dev/peps/pep-0008/
• Ruby: https://github.com/bbatsov/ruby-style-guide
• TypeScript: https://github.com/Microsoft/TypeScript/wiki/Coding-guidelines

For other languages, feel free to suggest.

You may find the current code base not 100% conform to the coding style and we welcome contributions to fix those.

Testing

To add test cases (optional) covering the change in the code generator, please refer to modules/swagger-codegen/src/test/java/io/swagger/codegen

To test the templates, please perform the following:

• Update the Petstore sample by running the shell script under bin folder. For example, run ./bin/ruby-petstore.sh to update the Ruby PetStore API client under samples/client/petstore/ruby (For Windows, the batch files can be found under bin\windows folder)
• Run the tests in the sample folder, e.g. in samples/client/petstore/ruby, run mvn integration-test -rf :RubyPetstoreClientTests. (some languages may not contain unit testing for Petstore and we're looking for contribution from the community to implement those tests)
• Finally, git commit the updated samples files: git commit -a (git add -A if added files with new test cases)

To start the CI tests, you can run mvn verify -Psamples (assuming you've all the required tools installed to run tests for different languages) or you can leverage http://travis-ci.org to run the CI tests by adding your own Swagger-Codegen repository.

Tips

• Smaller changes are easier to review
• [Optional] For bug fixes, provide a OpenAPI Spec to repeat the issue so that the reviewer can use it to confirm the fix
• Add test case(s) to cover the change
• Document the fix in the code to make the code more readable
• Make sure test cases passed after the change (one way is to leverage https://travis-ci.org/ to run the CI tests)