Function firstLine

internal/diff/git.go:556–563

firstLine returns the first non-empty trimmed line of git output, so a stray trailing newline or an unexpected second line never pollutes a resolved SHA.

(out string)

// firstLine returns the first non-empty trimmed line of git output, so a stray
// trailing newline or an unexpected second line never pollutes a resolved SHA.
func firstLine(out string) string {
	for _, line := range strings.Split(out, "\n") {
		if s := strings.TrimSpace(line); s != "" {
			return s
		}
	}
	return ""
}

// workspaceTrackedDiff returns the tracked-file diff, git's stderr, and the
// failure if there was one. Stderr is returned separately so the caller can