(define (standard-command-plugin-completer command args)
  #f)

(define (standard-command-plugin-evaluater command args)
  (run/strings (,command ,@args)))

(define standard-command-plugin
  (make-command-plugin #f
		       standard-command-plugin-completer
		       standard-command-plugin-evaluater))

;; some common commands

(define no-completer (lambda args #f))

(register-plugin!
 (make-command-plugin "ls"
		      no-completer
 		      (lambda (command args)
 			(directory-files))))

(register-plugin!
 (make-command-plugin "pwd"
		      no-completer
 		      (lambda (command args)
 			(cwd))))

(register-plugin!
 (make-command-plugin "cd"
		      no-completer
 		      (lambda (command args)
 			(chdir (car args)))))

(register-plugin!
 (make-command-plugin "setenv"
		      no-completer
 		      (lambda (command args)
 			(setenv (car args) (cadr args)))))

(register-plugin!
 (make-command-plugin "getenv"
		      no-completer
		      (lambda (command args)
			(getenv (car args)))))

(register-plugin!
 (make-command-plugin "printenv"
		      no-completer
 		      (lambda (command args)
 			(env->alist))))