Function FindMainGroovyScript

src/java/containers/groovy_utils.go:128–148

FindMainGroovyScript determines which Groovy script should be executed. Following Ruby buildpack logic, a file is a candidate if it has a static void main() method, is not a POGO, or has a shebang. Returns the single candidate if exactly one matches, empty string otherwise.

(scripts []string)

// void main() method, is not a POGO, or has a shebang.
// Returns the single candidate if exactly one matches, empty string otherwise.
func FindMainGroovyScript(scripts []string) (string, error) {
	g := &GroovyUtils{}
	candidates := make(map[string]bool)

	for _, script := range scripts {
		if !isValidGroovyFile(script) {
			continue
		}
		if g.HasMainMethod(script) || !g.IsPOGO(script) || g.HasShebang(script) {
			candidates[script] = true
		}
	}

	if len(candidates) == 1 {
		for script := range candidates {
			return script, nil
		}
	}

	return "", nil
}