flakiness-go

A Flakiness.io reporter for Go's go test.

It wraps go test -json, turns the result into a Flakiness JSON Report, and (optionally) uploads it to Flakiness.io — the same report format used by the official Playwright, Jest, Vitest, and pytest reporters.

Built to slot directly into the flakiness/* reporter family: it follows the same configuration surface, the same upload protocol (incl. GitHub OIDC keyless auth and mandatory brotli report compression), and ships a features.md keyed to the official feature checklist. Its only dependency is a pure-Go brotli codec.

Install

go install github.com/mxschmitt/flakiness-go/cmd/flakiness-go@latest

Usage

Wrapper mode (recommended)

Prefix your normal go test invocation. flakiness-go runs go test -json for you, forwards every go test flag verbatim, and exits with the same status code — so it's a drop-in CI wrapper.

flakiness-go ./...
flakiness-go -run TestFoo ./pkg/... -count=2

A flakiness-report/ directory with report.json is written by default. View it locally with the Flakiness CLI:

flakiness show ./flakiness-report

Tip

Add flakiness-report/ to your .gitignore.

Stdin mode

If you'd rather control the go test invocation yourself, pipe a go test -json stream in:

go test -json ./... | flakiness-go --stdin

Uploading to Flakiness.io

GitHub Actions (OIDC — no secrets)

With id-token: write permission and a FLAKINESS_PROJECT set, uploads authenticate via GitHub's OIDC token — no access token needed. The project must be bound to the repository in your Flakiness.io project settings.

permissions:
  id-token: write
steps:
  - uses: actions/setup-go@v5
    with: { go-version: "1.24" }
  - run: go install github.com/mxschmitt/flakiness-go/cmd/flakiness-go@latest
  - run: flakiness-go ./...
    env:
      FLAKINESS_PROJECT: my-org/my-project

See .github/workflows/flakiness.yml for this repo dogfooding itself.

Access token

export FLAKINESS_ACCESS_TOKEN="flakiness-io-..."
flakiness-go ./...

Configuration

Each option resolves with the precedence CLI flag > environment variable > default. Any flag not listed here is forwarded to go test.

Flag	Env	Default	Description
--flakiness-output-dir	FLAKINESS_OUTPUT_DIR	flakiness-report	Directory for the JSON report
--flakiness-commit-id	FLAKINESS_COMMIT_ID	git HEAD	Commit under test
--flakiness-name	FLAKINESS_NAME	go	Environment name / report category
--flakiness-git-root	FLAKINESS_GIT_ROOT	git toplevel	Root for path normalization
--flakiness-title	FLAKINESS_TITLE	—	Human-readable report title
--flakiness-project	FLAKINESS_PROJECT	—	org/project, required for GitHub OIDC
--flakiness-access-token	FLAKINESS_ACCESS_TOKEN	—	Upload token
--flakiness-endpoint	FLAKINESS_ENDPOINT	https://flakiness.io	Service endpoint
--flakiness-disable-upload	FLAKINESS_DISABLE_UPLOAD	false	Write the report but don't upload
--stdin	—	false	Read go test -json from stdin

Custom environment data

FK_ENV_* variables are recorded into the report's environment metadata (prefix stripped and key + value lowercased/trimmed, matching the other Flakiness reporters): FK_ENV_GPU_TYPE=H100 becomes gpu_type: "h100".

How it maps go test to the report

go test concept	Report
package (import path)	file suite
func TestXxx	a test (source-located via go/ast)
subtest TestXxx/a/b	nested suite per segment, leaf is a test
repeated run (-count=N)	additional RunAttempts on the test
pass / fail / skip	attempt status; panic: test timed out → timedOut
t.Skip(reason)	skip annotation with the reason

Full feature coverage and intentional N/As are documented in features.md. Design rationale lives in PLAN.md.

Development

go test ./...      # run the suite
go vet ./...
go build ./cmd/flakiness-go

See CONTRIBUTING.md.

License

MIT