大容量安装包

Question

我正在使用这建议，试图让Emacs为我管理我的包。我不能让Emacs来验证这段代码，它应该安装我所有的软件包，但是目前它什么也没做。我的私奔里有什么我看不到的错误吗？

;;; Emacs is not a package manager, and here we load its package manager!
(require 'package)
(dolist (source '(("marmalade" . "http://marmalade-repo.org/packages/")
                  ("elpa" . "http://tromey.com/elpa/")
                  ;; TODO: Maybe, use this after emacs24 is released
                  ;; (development versions of packages)
                  ("melpa" . "http://melpa.milkbox.net/packages/")
                  ))
  (add-to-list 'package-archives source t))
(package-initialize)

;;; Required packages
;;; everytime emacs starts, it will automatically check if those packages are
;;; missing, it will install them automatically
(when (not package-archive-contents)
  (package-refresh-contents))
(defvar tmtxt/packages
  '(evil git-gutter monokai-theme magit markdown-mode evil-leader jedi evil-surround arduino-mode evil-nerd-commenter zeal-at-point))

(dolist (p tmtxt/packages)
  (lambda () 
      (when (not (package-installed-p p))
        (package-install p))
      (require p)))

Answer 1

您的dolist的主体仅仅是一个“lambda表达式”，即它立即计算为一个被立即丢弃的函数。由于您希望执行函数的主体，所以只需删除(lambda () ...)包装器：

(dolist (p tmtxt/packages)
  (when (not (package-installed-p p))
    (package-install p))
  (require p))