func computeFlakesFromBuilds()

in infra/utils/fbf/cmd/flaky.go [77:117]

• 32 lines of code
• 11 McCabe index (conditional complexity)

func computeFlakesFromBuilds(builds []*build) map[string]flake {
	flakes := make(map[string]flake)
	for _, b1 := range builds {
		// commit may have multiple builds so the key for flake lookup is
		// computed from commitSHA and job name
		flakeKey := fmt.Sprintf("%s-%s", b1.commitSHA, b1.jobName)
		// skip if flakes with same flakeKey were previously computed
		//todo(bharathkkb): optimize, we can probably remove elems in a flake from build slice
		_, exists := flakes[flakeKey]
		if exists {
			continue
		}
		// store individual build info
		passedBuildsWithCommit := make(map[string]*build)
		failedBuildsWithCommit := make(map[string]*build)
		storeBuildInfo := func(b *build) {
			switch b.status {
			case successStatus:
				passedBuildsWithCommit[b.id] = b
			case failedStatus:
				failedBuildsWithCommit[b.id] = b
			}
		}
		storeBuildInfo(b1)

		for _, b2 := range builds {
			// match other builds with same commit,repo and job
			if b1.commitSHA == b2.commitSHA &&
				b1.repoName == b2.repoName &&
				b1.jobName == b2.jobName {
				storeBuildInfo(b2)
			}
		}

		// At least one pass and one fail for a given commit is necessary to become a flake
		if len(passedBuildsWithCommit) > 0 && len(failedBuildsWithCommit) > 0 {
			flakes[flakeKey] = flake{repo: b1.repoName, commitSHA: b1.commitSHA, passes: passedBuildsWithCommit, fails: failedBuildsWithCommit}
		}
	}
	return flakes
}