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This commit upgrades the codebase from Go 1.25.5 to Go 1.26rc2 and adopts new language features. Toolchain updates: - go.mod: go 1.25.5 → go 1.26rc2 - flake.nix: buildGo125Module → buildGo126Module, go_1_25 → go_1_26 - flake.nix: build golangci-lint from source with Go 1.26 - Dockerfile.integration: golang:1.25-trixie → golang:1.26rc2-trixie - Dockerfile.tailscale-HEAD: golang:1.25-alpine → golang:1.26rc2-alpine - Dockerfile.derper: golang:alpine → golang:1.26rc2-alpine - .goreleaser.yml: go mod tidy -compat=1.25 → -compat=1.26 - cmd/hi/run.go: fallback Go version 1.25 → 1.26rc2 - .pre-commit-config.yaml: simplify golangci-lint hook entry Code modernization using Go 1.26 features: - Replace tsaddr.SortPrefixes with slices.SortFunc + netip.Prefix.Compare - Replace ptr.To(x) with new(x) syntax - Replace errors.As with errors.AsType[T] Lint rule updates: - Add forbidigo rules to prevent regression to old patterns
Integration testing
Headscale relies on integration testing to ensure we remain compatible with Tailscale.
This is typically performed by starting a Headscale server and running a test "scenario" with an array of Tailscale clients and versions.
Headscale's test framework and the current set of scenarios are defined in this directory.
Tests are located in files ending with _test.go and the framework are located in the rest.
Running integration tests locally
The easiest way to run tests locally is to use act, a local GitHub Actions runner:
act pull_request -W .github/workflows/test-integration.yaml
Alternatively, the docker run command in each GitHub workflow file can be used.
Running integration tests on GitHub Actions
Each test currently runs as a separate workflows in GitHub actions, to add new test, run
go generate inside ../cmd/gh-action-integration-generator/ and commit the result.