Method buildClasspath

src/java/containers/groovy.go:140–165

buildClasspath globs all JARs under the build dir and returns a "-cp <...>" flag string with runtime-relative paths (using $HOME), mirroring the Ruby buildpack's add_libs behaviour.

()

// buildClasspath globs all JARs under the build dir and returns a "-cp <...>" flag string
// with runtime-relative paths (using $HOME), mirroring the Ruby buildpack's add_libs behaviour.
func (g *GroovyContainer) buildClasspath() string {
	buildDir := g.context.Stager.BuildDir()

	var jarPaths []string
	err := filepath.Walk(buildDir, func(path string, info os.FileInfo, err error) error {
		if err != nil || info.IsDir() {
			return err
		}
		if strings.HasSuffix(info.Name(), ".jar") {
			rel, relErr := filepath.Rel(buildDir, path)
			if relErr == nil {
				jarPaths = append(jarPaths, "$HOME/"+filepath.ToSlash(rel))
			}
		}
		return nil
	})
	if err != nil {
		g.context.Log.Debug("Error walking build dir for JARs: %s", err.Error())
	}

	if len(jarPaths) == 0 {
		return "-cp ${CLASSPATH:+:$CLASSPATH}${CONTAINER_SECURITY_PROVIDER:+:$CONTAINER_SECURITY_PROVIDER}"
	}
	// Adding also container security provider and the additional CLASSPATH env built when profile.d scripts are sourced
	return "-cp " + strings.Join(jarPaths, ":") + "${CLASSPATH:+:$CLASSPATH}${CONTAINER_SECURITY_PROVIDER:+:$CONTAINER_SECURITY_PROVIDER}"
}