Emacs工作流在编辑Bash脚本时运行 [英] Emacs workflow to edit Bash scripts while they run

问题描述

如果在脚本运行时编辑脚本，Bash可以给予意外结果。但是，编辑一个在shell中运行的脚本的临时副本通常是非常方便的，但是在再次运行它之前，请确保它已经回到原始位置。有没有人对Emacs的工作流程或自定义设置有帮助？

Bash can give unexpected results if one edits a script while the script is running. But it would often be very convenient to be able to edit a temporary copy of a script that I run within a shell, but make sure it is back in the original location before I run it again. Does anyone have suggestions for a workflow or customizations to Emacs to facilitate this?

推荐答案

Mx删除文件，按下来插入获取要编辑的文件的路径， RET 删除文件。当您下次保存缓冲区时，将创建一个新文件。 Bash将继续执行旧的已删除的文件。

M-x delete-file, press down to insert obtain the path to the file you're editing, and RET to delete the file. When you next save your buffer, this will create a new file. Bash will keep executing the old, deleted file.

顺便说一下，在大多数情况下，您甚至不需要采取这种预防措施。 Emacs通常保存到临时文件，然后将该临时文件重命名为正确的文件名（除非将其保留为备份，否则删除旧文件）。如果Emacs检测到该文件无法正确重新创建文件，Emacs将覆盖该文件：如果该文件具有硬链接，或者该目录没有写入权限。 （我简化了一点;细节在 files.el basic-save-buffer-2 函数>。）只要文件具有单个目录条目，并且对包含该脚本的目录具有写入权限，只需按 Cx Cs 。

By the way, in most cases, you don't even need to take this precaution. Emacs usually saves to a temporary file, then renames that temporary file to the proper file name (which deletes the old file, unless it's being kept as a backup). Emacs only overwrites the file in place if it detects that it can't recreate the file properly: if the file has hard links, or if you don't have write permission on the directory. (I'm simplifying a little; the details are in the basic-save-buffer-2 function in files.el.) As long as the file has a single directory entry and you have write permissions on the directory containing the script, just press C-x C-s.

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