如何获取 emacs grep 根据项目根目录搜索？

Question

I want emacs grep to always search from the root project directory, not the directory of the currently opened file. The assumption here is that all of your coding projects are under the same folder (like ~/repositories/ ).

I tried to prefix the grep command with a command that cd s into the project root, but this leaves the emacs working directory variable untouched, so while the grep is performed in the correct filesystem location, jumping to search results is broken, because the partial file paths of the grep matches are appended to the emacs working directory.

To summarize, I want to be in ~/repositories/my_project/folder1/file1.c , invoke grep command which will search from ~/repositories/my_project/ , and have the jump to file functionality of the grep buffer work.

How can I achieve this?

Answer 1

This does not answer directly your grep question but especially when working with projects, I always find projectile to be a great tool.

Projectile, amongst other things, provides a grep , ack and ag search on a project level which is probably what you are looking for.

Eg

Cc psg runs grep on the files in the project.

Answer 2

you can simply run this using project.el builtin project package manager in emacs project-execute-extended-command with keybinding Cx px and then execute the extended command rgrep or grep depending on what you want.

So I normaly do Cx px -> rgrep -> enter-query et voila!