From 9a49230095fce847264bc0630dde3906772e7954 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Madeleine=20Sydney=20=C5=9Alaga?= <msyds@deertopia.net>
Date: Tue, 11 Nov 2025 00:40:32 -0700
Subject: [PATCH] feat(emacs): xetex and plex

---
 modules/home/users/msyds/emacs.nix            |  1 +
 .../home/users/msyds/emacs/lisp/syd/fonts.el  |  2 +-
 .../users/msyds/emacs/lisp/syd/org/latex.el   | 34 ++++---------------
 .../home/users/msyds/emacs/nix/plex-latex.nix | 20 +++++++++++
 users/msyds/default.nix                       |  2 --
 5 files changed, 29 insertions(+), 30 deletions(-)
 create mode 100644 modules/home/users/msyds/emacs/nix/plex-latex.nix

diff --git a/modules/home/users/msyds/emacs.nix b/modules/home/users/msyds/emacs.nix
index 8d85bec..83dbbe6 100644
--- a/modules/home/users/msyds/emacs.nix
+++ b/modules/home/users/msyds/emacs.nix
@@ -25,6 +25,7 @@ in {
     sydnix.users.msyds.emacs = {
       jinx.enable = true;
       tufte-latex.enable = true;
+      plex-latex.enable = true;
     };
 
     sydnix.emacs = {
diff --git a/modules/home/users/msyds/emacs/lisp/syd/fonts.el b/modules/home/users/msyds/emacs/lisp/syd/fonts.el
index 4792d58..4688e9b 100644
--- a/modules/home/users/msyds/emacs/lisp/syd/fonts.el
+++ b/modules/home/users/msyds/emacs/lisp/syd/fonts.el
@@ -5,7 +5,7 @@
   "Default fixed-pitch (monospace) font.")
 
 (defvar syd-variable-pitch-font
-  (font-spec :family "IBM Plex Serif" :size 15)
+  (font-spec :family "IBM Plex Serif" :size 17)
   "Default variable-pitch font.")
 
 (defvar syd-alt-fixed-pitch-font
diff --git a/modules/home/users/msyds/emacs/lisp/syd/org/latex.el b/modules/home/users/msyds/emacs/lisp/syd/org/latex.el
index 4e9b34f..0e52cca 100644
--- a/modules/home/users/msyds/emacs/lisp/syd/org/latex.el
+++ b/modules/home/users/msyds/emacs/lisp/syd/org/latex.el
@@ -15,7 +15,8 @@
   (org-latex-preview 'buffer))
 
 (use-package org
-  :custom (org-startup-with-latex-preview t)
+  :custom ((org-startup-with-latex-preview t)
+           (org-latex-compile "xelatex"))
   :general (:keymaps 'org-mode-map
             :states '(normal visual motion emacs insert)
             :major-modes t
@@ -38,32 +39,11 @@
            (org-latex-preview-live-debounce 0.25)
            ;; Increase size of previews.
            (org-latex-preview-appearance-options
-            (plist-put org-latex-preview-appearance-options :zoom 1.2)))
-  :hook (org-mode . org-latex-preview-mode)
-  :config
-  (add-to-list
-   'org-latex-preview-process-alist
-   `(dvisvgm
-     :programs ("latex" "dvisvgm") :description "dvi > svg" :message
-     "you need to install the programs: latex and dvisvgm."
-     :image-input-type "dvi" :image-output-type "svg" :latex-compiler
-     ("%l -interaction nonstopmode -output-directory %o %f")
-     :latex-precompiler
-     ("%l -output-directory %o -ini -jobname=%b \"&%L\" mylatexformat.ltx %f")
-     :image-converter
-     (,(syd-str
-        " "
-        "dvisvgm"
-        "--page=1-"
-        "--optimize"
-        "--clipjoin"
-        "--relative"
-        "--no-fonts"
-        "-v3"
-        "--message='processing page {?pageno}: output written to {?svgpath}'"
-        "--bbox=min"
-        "-o %B-%%9p.svg"
-        "%f")))))
+            (plist-put org-latex-preview-appearance-options :zoom 1.0))
+           (org-latex-preview-process-precompile
+            ;; Not suported by XeLaTeX or LuaLaTeX }:(.
+            (eq org-latex-compiler "pdflatex")))
+  :hook (org-mode . org-latex-preview-mode))
 
 (use-package org-contrib)
 
diff --git a/modules/home/users/msyds/emacs/nix/plex-latex.nix b/modules/home/users/msyds/emacs/nix/plex-latex.nix
new file mode 100644
index 0000000..de75f7e
--- /dev/null
+++ b/modules/home/users/msyds/emacs/nix/plex-latex.nix
@@ -0,0 +1,20 @@
+{ config, lib, pkgs, ... }:
+
+let cfg = config.sydnix.users.msyds.emacs.plex-latex;
+in {
+  options.sydnix.users.msyds.emacs.plex-latex = {
+    enable = lib.mkEnableOption "the IBM Plex font within Org-mode LaTeX";
+  };
+
+  config = lib.mkIf cfg.enable {
+    sydnix.emacs.tex.extraTexPackages = {
+      inherit (pkgs.texlive)
+        plex
+        plex-otf
+        fontaxes
+        unicode-math
+        xetex
+        ;
+    };
+  };
+}
diff --git a/users/msyds/default.nix b/users/msyds/default.nix
index 9858d10..9f15c32 100644
--- a/users/msyds/default.nix
+++ b/users/msyds/default.nix
@@ -19,8 +19,6 @@
     home.file.".ssh/id_ed25519.pub".source =
       ../../public-keys/ssh/crumb-at-nixos-testbed.pub;
 
-    home.packages = [];
-
     fonts.fontconfig.enable = true;
 
     sydnix = {