如何在Emacs中设置编译的默认目录？ [英] How to set the default-directory of compilation in Emacs?

问题描述

我在Emacs下编写OCaml，在工作文件夹中有一个 makefile ，还有几个子文件夹包含 .ml 文件。如果我启动 Mx编译和 make 在$ code> makefile ，但不支持$ code> .ml 文件的缓冲区，它给我一个错误：

   -  *  -  mode：compilation; default-directory：... -  *  -  
编译从Fri Jan 27开始18:51:35 
 
 make -k 
 make：***没有指定目标并没有找到makefile。停止。 
 
编译异常退出代码2在Fri Jan 27 18:51:35 
  

这是可以理解的，因为默认目录是不包含 makefile 的子文件夹。有没有人知道如何将 makefile 的文件夹设置为编译的默认目录？

解决方案

Matthias Puech拥有一个 .dir-local 文件的

 （（nil。（（eval）（setq default-directory 
（locate-dominating-file buffer-file-name 
.dir-locals.el）
）））））
  

大概也可以使用以下内容：（shell-command-to-stringgit rev-parse --show-toplevel）作为最内层的位。

I am coding OCaml under Emacs, I have one makefile in the working folder, and several sub-folders containing .ml files. If I launch M-x compile and make works fine on a buffer of makefile, but does not work on a buffer of a .ml file, it gives me an error:

-*- mode: compilation; default-directory: "..." -*-
Compilation started at Fri Jan 27 18:51:35

make -k
make: *** No targets specified and no makefile found.  Stop.

Compilation exited abnormally with code 2 at Fri Jan 27 18:51:35

It is understandable because the default-directory is sub-folder which does not contain makefile. Does anyone know how to set the folder of makefile always as the default-directory of compilation?

解决方案

Matthias Puech has a solution involving a .dir-local file in the project root directory:

((nil . ((eval . (setq default-directory 
                  (locate-dominating-file buffer-file-name
                   ".dir-locals.el")
)))))

It is presumably also possible to use something like: (shell-command-to-string "git rev-parse --show-toplevel") as that innermost bit.

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