I have a situation where (project-current) gets the project root "wrong", i.e. not what I want it to be - specifically the project is part of a larger project that project.el doesn't know about. Is there any way to override that, using perhaps a dir-local variable or some other method?
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Two questions: do you mean that the project root would be a subdirectory of a large Git (mono)repo? Or that you want the project to be larger than the current Git repo?– DmitrySep 27, 2021 at 11:43
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And if it's the former: would you want to "parent" project to still be able to include subproject's files as its own? And have project-find-file and project-find-regexp always search across subprojects?– DmitrySep 27, 2021 at 11:44
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What I meant by "specifically the project is part of a larger project" is that project.el thinks the project is rooted at /a/b/c/d (for whatever reason), but I want to override that so the project root is /a/b, which conceptually is my project root. So in my case there are no subprojects, just one big project to search.– GaryOSep 28, 2021 at 12:13
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I'm asking about particular reasons the project root is detected where it is detected. To be able to choose the optimal technical implementation.– DmitrySep 28, 2021 at 15:40
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To be honest, at the time I wasn't super inclined to dig into the implementation to know why it was wrong. If I remember, my case was a Typescript/Vue app in a larger git monorepo, which might work fine now -- I guess I was hoping for a general "escape hatch" rather than a smarter root autodetection (though that's always great too!)– GaryOSep 28, 2021 at 21:20
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2 Answers
I ran into this, too, and published the project-find-functions hook I use on https://michael.stapelberg.ch/posts/2021-04-02-emacs-project-override/:
;; Returns the parent directory containing a .project.el file, if any,
;; to override the standard project.el detection logic when needed.
(defun zkj-project-override (dir)
(let ((override (locate-dominating-file dir ".project.el")))
(if override
(cons 'vc override)
nil)))
(use-package project
;; Cannot use :hook because 'project-find-functions does not end in -hook
;; Cannot use :init (must use :config) because otherwise
;; project-find-functions is not yet initialized.
:config
(add-hook 'project-find-functions #'zkj-project-override))
Hope this helps :)
No buffer-local vars available as an option, but you can add your own element to project-find-functions which would call project-current in some parent directory.
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2This is a crazy omission from a base project tool. it has taken me ages to find this. I think I'll need to move back to projectile.– RichieHHJun 7, 2021 at 10:43
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