func ListExternalAgentPaths()

in lambda/agents/agent.go [15:44]

• 24 lines of code
• 7 McCabe index (conditional complexity)

func ListExternalAgentPaths(dir string, root string) []string {
	var agentPaths []string
	if !isCanonical(dir) || !isCanonical(root) {
		log.Warningf("Agents base paths are not absolute and in canonical form: %s, %s", dir, root)
		return agentPaths
	}
	fullDir := path.Join(root, dir)
	files, err := os.ReadDir(fullDir)

	if err != nil {
		if os.IsNotExist(err) {
			log.Infof("The extension's directory %q does not exist, assuming no extensions to be loaded.", fullDir)
		} else {
			// TODO - Should this return an error rather than ignore failing to load?
			log.WithError(err).Error("Cannot list external agents")
		}

		return agentPaths
	}

	for _, file := range files {
		if !file.IsDir() {
			// The returned path is absolute wrt to `root`. This allows
			// to exec the agents in their own mount namespace
			p := path.Join("/", dir, file.Name())
			agentPaths = append(agentPaths, p)
		}
	}
	return agentPaths
}