ESS: 从在ESS[R]下输入的命令或脚本中检索命令历史记录

Question

ESS: 从在ESS[R]下输入的命令或脚本中检索命令历史记录

4

在使用ESS[R]时，如果以劣质模式进行操作，您可以使用C-c C-p检索最近的命令输出，该快捷键将光标移动到上一条命令输出。或者，您也可以使用C-up，它基本上会从劣质进程中复制最近输入的命令（类似于readline的工作方式）。我更喜欢使用C-up方法，但不幸的是，它无法检索使用任何ess-eval命令从脚本输入的命令。是否有方法可以获取C-up功能，以便检索在劣质模式和ess-eval中输入的命令？

- Manuel Morales

2个回答

1

看起来并没有内置函数可以做到这一点，所以我编写了下面的函数。本质上，此函数自动化了使用按键C-c C-p将光标移动到R进程缓冲区中的上一个命令，然后使用C-c RET将该命令复制到提示符以进行编辑的过程。

(defun ess-readline ()
  "Move to previous command entered from script *or* R-process and copy 
   to prompt for execution or editing"
  (interactive)
  ;; See how many times function was called
  (if (eq last-command 'ess-readline)
      (setq ess-readline-count (1+ ess-readline-count))
    (setq ess-readline-count 1))
  ;; Move to end of buffer and delete current input
  (end-of-buffer nil)
  (comint-kill-input)
  ;; Copy n'th command in history where n = ess-readline-count
  (comint-previous-prompt ess-readline-count)
  (comint-copy-old-input)
  ;; Below is needed to update counter for sequential calls
  (setq this-command 'ess-readline)
)
(global-set-key (kbd "\C-cp") 'ess-readline)

- Manuel Morales

1

你可以通过(define-key comint-mode-map [C-up] 'ess-readline)将其绑定到C-up。 - Heather Turner

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- Heather Turner · Accepted Answer

你的解决方案对单行命令有效，但需要进行一些小调整才能处理多行语句：

(defun ess-readline ()
  "Move to previous command entered from script *or* R-process and copy 
   to prompt for execution or editing"
  (interactive)
  ;; See how many times function was called
  (if (eq last-command 'ess-readline)
      (setq ess-readline-count (1+ ess-readline-count))
    (setq ess-readline-count 1))
  ;; Move to prompt and delete current input
  (comint-goto-process-mark)
  (end-of-buffer nil) ;; tweak here
  (comint-kill-input)
  ;; Copy n'th command in history where n = ess-readline-count
  (comint-previous-prompt ess-readline-count)
  (comint-copy-old-input)
  ;; Below is needed to update counter for sequential calls
  (setq this-command 'ess-readline)
)
(global-set-key (kbd "\C-cp") 'ess-readline)

这可以让您向上移动到先前的命令; 以下功能使您能够再次向下移动，因此您可以上下移动以找到所需的命令：

(defun ess-readnextline ()
  "Move to next command after the one currently copied to prompt and copy 
   to prompt for execution or editing"
  (interactive)
  ;; Move to prompt and delete current input
  (comint-goto-process-mark)
  (end-of-buffer nil)
  (comint-kill-input)
  ;; Copy (n - 1)'th command in history where n = ess-readline-count
  (setq ess-readline-count (max 0 (1- ess-readline-count)))
  (when (> ess-readline-count 0)
      (comint-previous-prompt ess-readline-count)
  (comint-copy-old-input))
  ;; Update counter for sequential calls
  (setq this-command 'ess-readline)
)
(global-set-key (kbd "\C-cn") 'ess-readnextline)