Projectile: How to include files of a sub directory into the project of of it's parent directory?

Question

Given a project directory my-project which projectile correctly identifies because it is a git project.

Inside my-project there is a my-module directory. It is a git submodule and therefor projectile identifies it as a project of it's own.

But I want all files inside of my-project/my-module to be considered as part of my-project.

What is the idiomatic way to configure this?

I would like a solution in dir-locals.el so it does not affect other projects.

Answer 1

The solution was putting this into my-project/my-module/.dir-locals.el:

((nil . ((projectile-project-root . "/p/my-project/"))))

Answer 2

See the issues: https://github.com/bbatsov/projectile/issues/712 / https://github.com/bbatsov/projectile/issues/1449.

One of the options suggested there is to (edit: I've changed projectile-project-root-files-functions -> projectile-project-root-functions which it was aliased to):

(setq projectile-project-root-functions '(projectile-root-local
                                          projectile-root-top-down
                                          projectile-root-top-down-recurring
                                          projectile-root-bottom-up))

Edit: I see you want this to not to affect other projects so you'd want to put this in .dir-locals.el in the project root.