将 Emacs 变量传递给 minibuffer shell 命令 [英] Passing Emacs variables to minibuffer shell commands

问题描述

我可以通过点击 M-! 快速运行 shell 命令.我想做的一件事是对当前文件执行 shell 快速操作.一个例子是通过 perforce 检出文件:

I can run a shell command quickly by hitting M-!. One thing I'd like to do is perform shell quick operations on the current file. An example would be checking the file out through perforce:

M-! p4 编辑缓冲区文件名 RET

(是的，有 perforce 集成，但我对 minishell/变量问题更感兴趣，而不是特定的工作流程)

(Yes there are perforce integrations, but I'm more interested in the minishell/variable problem rather than a specific workflow)

当然，buffer-file-name 变量在命令发送到 shell 之前不会被评估.

Of course, the buffer-file-name variable is not evaluated before the command is sent to the shell.

有没有一种简单的即时方法来做到这一点?还是我必须推出自定义的 elisp 功能?

Is there an easy on-the-fly way to do this? Or will I have to roll a custom elisp function?

推荐答案

确实使用 C-u M-: 几乎是正确的.我不太确定在 eval-to-shell-argument 中使用 shell-quote-argument，因为它只适用于字符串，因此无法使用 eval-to-shell-argument 插入数字或符号.您可以尝试以下操作:

Indeed using C-u M-: is almost right. I'm not so sure about using shell-quote-argument in eval-to-shell-argument since it only works on strings making it impossible to use eval-to-shell-argument to insert a number or a symbol. You could try something like:

(defun sm-minibuffer-insert-val (exp)
  (interactive
   (list (let ((enable-recursive-minibuffers t))
           (read-from-minibuffer "Insert: "
                                 nil read-expression-map t
                                 'read-expression-history))))
    (let ((val (with-selected-window (minibuffer-selected-window)
                 (eval exp)))
          (standard-output (current-buffer)))
      (prin1 val)))

然后使用 (define-key minibuffer-local-map [?M-:] 'sm-minibuffer-insert-val) 将此函数绑定到您的迷你缓冲区中.当然，如果您只想插入缓冲区文件名，那么您的 execute-shell-command-on-buffer 会更简单.

and then bind this function in your minibuffer with (define-key minibuffer-local-map [?M-:] 'sm-minibuffer-insert-val). Of course, if the only thing you ever want to insert is the buffer-file-name, then your execute-shell-command-on-buffer is simpler.

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