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Use org roam V2 with native compilation

Philippe Crama edited this page 2021-11-10 19:00:52 +01:00

Even after setting org-roam-v2-ack to t in my init.el file, everytime my Emacs updated org-roam (through M-x list-packages) native compilation would display the "You are now on V2" warning and native compilation would fail.

The problem is that the package was compiled to native code asynchronously (i.e. with a separate emacs process started with --batch that did not read my init.el file) org-roam-v2-ack was not set; resulting in the warning (with :error level) that aborted the native compilation. Luckily, there is the native-comp-async-env-modifier-form that can be customized to add some code to execute before compiling asynchronously, so I solved it like this:

(defun phc-prognify-and-append (form new-form)
  "Wrap FORM in `progn' if needed and append NEW-FORM"
  (cond ((and (consp form)
              (eq (car form) 'progn))
         (append form (list new-form)))
        ((null form)
         `(progn ,new-form))
        (t
         `(progn ,form ,new-form))))
(use-package org-roam
  ;; ... snip other configuration irrelevant for this wiki page ...
  :init
  (defvar org-roam-v2-ack t)
  (set-default 'native-comp-async-env-modifier-form
               (phc-prognify-and-append
                (when (boundp 'native-comp-async-env-modifier-form)
                  native-comp-async-env-modifier-form)
                `(defvar org-roam-v2-ack ,org-roam-v2-ack))))