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zk/CONTRIBUTING.md

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Contributing to zk

Understanding the codebase

Building the project

It is recommended to use the Makefile for compiling the project, as the go command requires a few parameters.

make build

This will be expanded to the following command:

CGO_ENABLED=1 GOARCH=arm64 go build -tags "fts5" -ldflags "-X=main.Version=`git describe --tags --match v[0-9]* 2> /dev/null` -X=main.Build=`git rev-parse --short HEAD`"
  • CGO_ENABLED=1 enables CGO, which is required by the mattn/go-sqlite3 dependency.
  • GOARCH=arm64 is only required for Apple Silicon chips.
  • -tags "fts5" enables the FTS option with mattn/go-sqlite3, which handles much of the magic behind zk's --match filtering option.
  • -ldflags "-X=main.Version=`git describe --tags --match v[0-9]* 2> /dev/null` -X=main.Build=`git rev-parse --short HEAD`" will automatically set zk's build and version numbers using the latest Git tag and commit SHA.

Automated tests

The project is vetted with two different kind of automated tests: unit tests and end-to-end tests.

Unit tests

Unit tests are using the standard Go testing library. To execute them, use the command make test.

They are ideal for testing parsing output or individual API edge cases and minutiae.

End-to-end tests

Most of zk's functionality is tested with functional tests ran with tesh, which you can execute with make tesh (or make teshb, to debug whitespaces changes).

When addressing a GitHub issue, it's a good idea to begin by creating a tesh file in tests/issue-XXX.tesh. If a starting notebook state is required, it can be added under tests/fixtures.

If you modify the output of zk, you may disrupt some tesh files. You can use make tesh-update to automatically update them with the correct output.

CI workflows

Several GitHub action workflows are executed when pull requests are merged or releases are created.

  • .github/workflows/build.yml checks that the project can be built and the tests still pass.
  • .github/workflows/codeql.yml runs static analysis to vet code quality.
  • .github/workflows/gh-pages.yml deploy the documentation files to GitHub Pages.
  • .github/workflows/release.yml submits a new version to Homebrew when a Git version tag is created.
  • .github/workflows/triage.yml automatically tags old issues and PRs as staled.

Releasing a new version

When zk is ready to be released, you can update the CHANGELOG.md (for example) and create a new Git version tag (for example v0.13.0). Make sure you follow the Semantic Versioning scheme.

Then, create a new GitHub release with a copy of the latest CHANGELOG.md entries and the binaries for all supported platforms.

Binaries can be created automatically using make dist-linux and make dist-macos.

Unfortunately, make dist-macos must be run manually on both an Apple Silicon and Intel chips. The Linux builds are created using Docker and these custom images.

This process is convoluted because zk requires CGO with mattn/go-sqlite3, which prevents using Go's native cross-compilation. Transitioning to a CGO-free SQLite driver such as cznic/sqlite could simplify the distribution process significantly.