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I'm trying to use directory local variables so my realgud:pdb invocation can be:

Run pdb (like this): /home/username/work/place/environments/default/bin/python -m pdb /home/username/work/place/scratch.py

Instead of :

Run pdb (like this): python -m pdb /home/username/work/place/scratch.py

as suggested here.

However, in order to transform the suggestion there to be compatible with .dir-locals.el, I understand I need to use nil and eval per this answer.

So I am left with this:

;; .dir-locals.el
;; set the test runner
((nil . ((eval . (add-hook 'python-mode-hook
  (function (lambda ()
              (let* ((conda-python (format "%/envs/default/bin/python -m pdb" (projectile-project-root))))
                (setq-local realgud:pdb-command-name conda-python))
              )))
         ))
      ))

This doesn't complain or fail, except for asking me whether I trust the eval parameters. However, it doesn't seem to work, as my M-x realgud:pdb invocation is still:

Run pdb (like this): python -m pdb /home/username/work/place/scratch.py

My init.el contains:

(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(column-number-mode t)
 '(conda-anaconda-home (expand-file-name "~/anaconda3"))
 '(elpy-test-pytest-runner-command '("py.test"))
 '(elpy-test-runner 'elpy-test-pytest-runner)

...which I don't think interferes but include for completeness.

What should I change so that my .dir-local.el picks up the correct test runner for pdb? Essentially, I am trying to combine the suggestion of the linked answer to modify my init.el, but in a per directory basis, using .dir-locals.el, as my projects have different environment names and I'm stuck having one per project.

1
  • For instance, this currently gives me: let*: Invalid format operation %/ Nov 9 '20 at 18:41
1

I tried instead of setting a hook, just eval the variable with the python-mode association and seems to work fine, here is the code:

((python-mode . ((eval .
           (setq-local realgud:pdb-command-name (concat
                             (projectile-project-root)
                             "envs/default/bin/python -m pdb"))))))

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