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[Emacs] Add part on how this litterate config works

This commit is contained in:
Lucien Cartier-Tilet 2020-12-23 02:13:45 +01:00
parent b1f2be0016
commit 9710304da7
Signed by: phundrak
GPG Key ID: BD7789E705CB8DCA
1 changed files with 35 additions and 0 deletions
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org/config/emacs.org
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@ -534,6 +534,41 @@ The ~dotspacemacs/init~ function is the one called at the very begining of the S
))
#+END_SRC
** Handling my Spacemacs litterate config
:PROPERTIES:
:header-args:emacs-lisp: :tangle no
:CUSTOM_ID: Init-Handling-my-Spacemacs-litterate-config-679170db
:END:
Just before we get onto the usual content of the ~dotspacemacs/init~ function you would find in a typical Spacemacs installation, I would like to talk a bit about how I manage writing a litterate config for Spacemacs and ensure Emacs starts with an up-to-date configuration from said litterate config. For that, I actually declared a couple of variables:
#+BEGIN_SRC emacs-lisp
(setq phundrak//dotspacemacs-src-dir "~/.config/emacs/private/"
phundrak//dotspacemacs-src "~/org/config/emacs.org"
phundrak//dotspacemacs-si (concat phundrak//dotspacemacs-src-dir "spacemacs-init")
phundrak//dotspacemacs-sl (concat phundrak//dotspacemacs-src-dir "spacemacs-layers")
phundrak//dotspacemacs-uc (concat phundrak//dotspacemacs-src-dir "user-config")
phundrak//dotspacemacs-ui (concat phundrak//dotspacemacs-src-dir "user-init"))
#+END_SRC
Now I know a couple of my files that get exported by this document. If I compare how recent these files are compared to my litterate config, I know if Emacs missed tangling its configuration before launching, so if any of my ~si~, ~sl~, ~uc~, or ~ui~ files are older than my ~emacs.org~, then I’ll tangle the latter; and since my user config is growing longer and longer, I want Emacs to be able to parse it fast next time it boots, so let’s compile my exported ~.el~ files!
#+BEGIN_SRC emacs-lisp
(when (or (file-newer-than-file-p phundrak//dotspacemacs-src (concat phundrak//dotspacemacs-si ".el"))
(file-newer-than-file-p phundrak//dotspacemacs-src (concat phundrak//dotspacemacs-sl ".el"))
(file-newer-than-file-p phundrak//dotspacemacs-src (concat phundrak//dotspacemacs-ui ".el"))
(file-newer-than-file-p phundrak//dotspacemacs-src (concat phundrak//dotspacemacs-uc ".el")))
(message "Exporting new Emacs configuration from spacemacs.org through org-babel...")
(with-temp-buffer
(shell-command (format "emacs -Q --batch %s %s %s"
"--eval \"(require 'ob-tangle)\""
"--eval \"(setq org-confirm-babel-evaluate nil)\""
(format "--eval '(org-babel-tangle-file \"%s\")'"
phundrak//dotspacemacs-src))
(current-buffer)))
(message "Exporting new Emacs configuration from spacemacs.org through org-babel...done")
(with-temp-buffer
(byte-recompile-directory phundrak//dotspacemacs-src-dir
0 t)))
#+END_SRC
All that’s left to do in the Spacemacs functions is to call ~load~ on ~si~, ~sl~, ~uc~, and ~ui~. Be aware this sub-chapter won’t be tangled, so it might not be up to date with the [[https://labs.phundrak.com/phundrak/dotfiles/src/branch/master/.spacemacs][actual dotspacemacs file]]. Please check it just in case something changed and I forgot to update this part of ~emacs.org~.
** Emacs with pdumper
:PROPERTIES:
:CUSTOM_ID: Init-Emacs_with_pdumper-f24ab30b