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Contributing

Contributor's Agreement

You are under no obligation whatsoever to provide any bug fixes, patches, or upgrades to the features, functionality or performance of the source code ("Enhancements") to anyone; however, if you choose to make your Enhancements available either publicly, or directly to the project, without imposing a separate written license agreement for such Enhancements, then you hereby grant the following license: a non-exclusive, royalty-free perpetual license to install, use, modify, prepare derivative works, incorporate into other computer software, distribute, and sublicense such enhancements or derivative works thereof, in binary and source code form.

Getting Started

When contributing to SingularityCE, it is important to properly communicate the gist of the contribution. If it is a simple code or editorial fix, simply explaining this within the GitHub Pull Request (PR) will suffice. But if this is a larger fix or Enhancement, you are advised to first discuss the change with the project leader or developers.

Please note we have a code of conduct. Please follow it in all your interactions with the project members and users.

Pull Requests (PRs)

  1. Essential bug fix PRs should be sent to both master and release branches.
  2. Small bug fix and feature enhancement PRs should be sent to master only.
  3. Follow the existing code style precedent, especially for C. For Go, you will mostly conform to the style and form enforced by the "go fmt" and "golint" tools for proper formatting.
  4. For any new functionality, please write appropriate go tests that will run as part of the Continuous Integration (Circle CI) system.
  5. Make sure that the project's default copyright and header have been included in any new source files.
  6. Make sure your code passes linting, by running make check before submitting the PR. We use golangci-lint as our linter. You may need to address linting errors by:
    • Running gofumpt . to format all .go files. We use gofumpt instead of gofmt as it adds additional formatting rules which are helpful for clarity.
    • Leaving a function comment on every new exported function and package that your PR has introduced. To learn about how to properly comment Go code, read this post on golang.org
  7. Make sure you have locally tested using make -C builddir test and that all tests succeed before submitting the PR.
  8. If possible, run make -C builddir testall locally, after setting the environment variables E2E_DOCKER_USERNAME and E2E_DOCKER_PASSWORD appropriately for an authorized Docker Hub account. This is required as SingularityCE's end-to-end tests perform many tests that build from or execute docker images. Our CI is authorized to run these tests if you cannot.
  9. Ask yourself is the code human understandable? This can be accomplished via a clear code style as well as documentation and/or comments.
  10. The pull request will be reviewed by others, and finally merged when all requirements are met.
  11. The CHANGELOG.md must be updated for any of the following changes:
    • Renamed commands
    • Deprecated / removed commands
    • Changed defaults / behaviors
    • Backwards incompatible changes
    • New features / functionalities
  12. PRs which introduce a new Go dependency to the project via go get and additions to go.mod should explain why the dependency is required. Any new dependency should be added to the LICENSE_DEPENDENCIES.md by running scripts/update-license-dependencies.md.

Documentation

There are a few places where documentation for the SingularityCE project lives. The changelog is where PRs should include documentation if necessary. When a new release is tagged, the user-docs and admin-docs will be updated using the contents of the CHANGELOG.md file as reference.

  1. The changelog is a place to document functional differences between versions of SingularityCE. PRs which require documentation must update this file. This should be a document which can be used to explain what the new features of each version of SingularityCE are, and should not read like a commit log. Once a release is tagged (e.g. v3.0.0), a new top level section will be made titled Changes Since vX.Y.Z (e.g. Changes Since v3.0.0) where new changes will now be documented, leaving the previous section immutable.
  2. The README is a place to document critical information for new users of SingularityCE. It should typically not change, but in the case where a change is necessary a PR may update it.
  3. The user-docs should document anything pertinent to the usage of SingularityCE.
  4. The admin-docs document anything that is pertinent to a system administrator who manages a system with SingularityCE installed.
  5. If necessary, changes to the message displayed when running singularity help * can be made by editing docs/content.go.