Add 'universal preamble' to org tex export

config.org

@@ -4984,20 +4984,9 @@ Now for a few more adjustments.
         '("latexmk -shell-escape -interaction=nonstopmode -f -pdf -output-directory=%o %f")))
 #+END_SRC
 
-Instead of just loading doing the 'minted stuff' all the time, we can try to be
-a bit cleverer.
-#+NAME: org-latex-smart-minted
-#+BEGIN_SRC emacs-lisp
-(defadvice! org-latex-header-smart-minted (orig-fn tpl def-pkg pkg snippets-p &optional extra)
-  "Include minted config if src blocks are detected."
-  :around #'org-splice-latex-header
-  (let ((header (funcall orig-fn tpl def-pkg pkg snippets-p extra))
-        (src-p (when (save-excursion
-                       (goto-char (point-min))
-                       (search-forward-regexp "#\\+BEGIN_SRC\\|#\\+begin_src" nil t))
-                 t)))
-    (concat header
-            (when src-p "
+We also want a particular preamble when minted is used,
+#+NAME: org-minted-preamble
+#+BEGIN_SRC LaTeX
 \\usepackage{minted}
 \\usepackage[many]{tcolorbox}
 \\setminted{
@@ -5038,7 +5027,43 @@ a bit cleverer.
   ]
 }
 \\AfterEndEnvironment{minted}{\\end{tcolorbox}}
-\\renewcommand\\theFancyVerbLine{\\color{black!60!white}\\arabic{FancyVerbLine}} % minted line numbering"))))
+\\renewcommand\\theFancyVerbLine{\\color{black!60!white}\\arabic{FancyVerbLine}} % minted line numbering
+#+END_SRC
+
+We also always want some particular elements in the preamble, let's call this
+the "universal preamble"
+#+NAME: org-universal-preamble
+#+BEGIN_SRC LaTeX
+\\usepackage[main,input,include]{embedall}
+\\IfFileExists{./\\jobname.org}{\\embedfile{\\jobname.org}}{}
+#+END_SRC
+
+Instead of just loading doing the 'minted stuff' all the time, we can try to be
+a bit cleverer, and handle the "universal preamble" while we're at it.
+#+NAME: org-latex-smart-minted
+#+BEGIN_SRC emacs-lisp :noweb yes
+(after! org
+  (defadvice! org-latex-header-smart-minted (orig-fn tpl def-pkg pkg snippets-p &optional extra)
+    "Include minted config if src blocks are detected."
+    :around #'org-splice-latex-header
+    (let ((header (funcall orig-fn tpl def-pkg pkg snippets-p extra))
+          (src-p (when (save-excursion
+                         (goto-char (point-min))
+                         (search-forward-regexp "#\\+BEGIN_SRC\\|#\\+begin_src" nil t))
+                   t)))
+      (concat header
+              org-latex-universal-preamble
+              (when src-p org-latex-minted-preamble))))
+
+  (defvar org-latex-minted-preamble "
+<<org-minted-preamble>>
+"
+    "Preamble to be inserted when minted is used.")
+
+  (defvar org-latex-universal-preamble "
+<<org-universal-preamble>>
+"
+    "Preamble to be included in every export."))
 #+END_SRC
 ***** Chameleon --- aka. match theme
 Once the idea of having the look of the LaTeX document produced match the