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Legal

By submitting a pull request, you represent that you have the right to license your contribution to Apple and the community, and agree by submitting the patch that your contributions are licensed under the Apache 2.0 license (see LICENSE.txt).

How to submit a bug report

Please ensure to specify the following:

  • SwiftServiceDiscovery commit hash
  • Contextual information (e.g. what you were trying to achieve with SwiftServiceDiscovery)
  • Simplest possible steps to reproduce
    • More complex the steps are, lower the priority will be.
    • A pull request with failing test case is preferred, but it's just fine to paste the test case into the issue description.
  • Anything that might be relevant in your opinion, such as:
    • Swift version or the output of swift --version
    • OS version and the output of uname -a
    • Network configuration

Example

SwiftServiceDiscovery commit hash: 22ec043dc9d24bb011b47ece4f9ee97ee5be2757

Context:
While load testing my server written with SwiftServiceDiscovery, I noticed
that one file descriptor is leaked per request.

Steps to reproduce:
1. ...
2. ...
3. ...
4. ...

$ swift --version
Swift version 4.0.2 (swift-4.0.2-RELEASE)
Target: x86_64-unknown-linux-gnu

Operating system: Ubuntu Linux 16.04 64-bit

$ uname -a
Linux beefy.machine 4.4.0-101-generic #124-Ubuntu SMP Fri Nov 10 18:29:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

My system has IPv6 disabled.

Writing a Patch

A good SwiftServiceDiscovery patch is:

  1. Concise, and contains as few changes as needed to achieve the end result.
  2. Tested, ensuring that any tests provided failed before the patch and pass after it.
  3. Documented, adding API documentation as needed to cover new functions and properties.
  4. Accompanied by a great commit message, using our commit message template.

Run CI checks locally

You can run the Github Actions workflows locally using act. To run all the jobs that run on a pull request, use the following command:

% act pull_request

To run just a single job, use workflow_call -j <job>, and specify the inputs the job expects. For example, to run just shellcheck:

% act workflow_call -j soundness --input shell_check_enabled=true

To bind-mount the working directory to the container, rather than a copy, use --bind. For example, to run just the formatting, and have the results reflected in your working directory:

% act --bind workflow_call -j soundness --input format_check_enabled=true

If you'd like act to always run with certain flags, these can be be placed in an .actrc file either in the current working directory or your home directory, for example:

--container-architecture=linux/amd64
--remote-name upstream
--action-offline-mode

Make sure Tests work on Linux

SwiftServiceDiscovery uses XCTest to run tests on both macOS and Linux.

How to contribute your work

Please open a pull request at https://github.com/apple/swift-service-discovery. Make sure the CI passes, and then wait for code review.