Move referencing setup into different file

modules/lang/latex/+ref.el

@@ -0,0 +1,60 @@
+;;; lang/latex/+ref.el -*- lexical-binding: t; -*-
+
+(defvar +latex-bibtex-file ""
+  "File AUCTeX (specifically RefTeX) uses to search for citations.")
+
+(def-package! reftex
+  :hook ((latex-mode LaTeX-mode) . turn-on-reftex)
+  :init
+  (setq reftex-plug-into-AUCTeX t
+        reftex-toc-split-windows-fraction 0.3)
+  :config
+  ;; Get ReTeX working with biblatex
+  ;; http://tex.stackexchange.com/questions/31966/setting-up-reftex-with-biblatex-citation-commands/31992#31992
+  (setq reftex-cite-format
+        '((?t . "\\textcite[]{%l}")
+          (?a . "\\autocite[]{%l}")
+          (?c . "\\cite[]{%l}")
+          (?s . "\\smartcite[]{%l}")
+          (?f . "\\footcite[]{%l}")
+          (?n . "\\nocite{%l}")
+          (?b . "\\blockcquote[]{%l}{}")))
+  (unless (string-empty-p +latex-bibtex-file)
+    (setq reftex-default-bibliography (list (expand-file-name +latex-bibtex-file))))
+  (map! :map reftex-mode-map
+        :localleader :n ";" 'reftex-toc)
+  (add-hook! 'reftex-toc-mode-hook
+    (reftex-toc-rescan)
+    (map! :local
+          :e "j"   #'next-line
+          :e "k"   #'previous-line
+          :e "q"   #'kill-buffer-and-window
+          :e "ESC" #'kill-buffer-and-window)))
+
+(def-package! company-reftex
+  :when (featurep! :completion company)
+  :after reftex
+  :config
+  (set-company-backend! 'reftex-mode 'company-reftex-labels 'company-reftex-citations))
+
+(def-package! bibtex
+  :defer t
+  :config
+  (setq bibtex-dialect 'biblatex
+        bibtex-align-at-equal-sign t
+        bibtex-text-indentation 20)
+  (define-key bibtex-mode-map (kbd "C-c \\") #'bibtex-fill-entry))
+
+(def-package! ivy-bibtex
+  :when (featurep! :completion ivy)
+  :commands ivy-bibtex)
+
+(def-package! helm-bibtex
+  :when (featurep! :completion helm)
+  :commands helm-bibtex)
+
+(after! bibtex-completion
+  (unless (string-empty-p +latex-bibtex-file)
+    (setq bibtex-completion-bibliography (list (expand-file-name +latex-bibtex-file)))))
+
+