(feat): disable unnecessary org-mode startup for temp buffers (#1057)

Set `org-inhibit-startup` to `t` to reduce the amount of time taken to set up org-mode buffers. For example, this disables latex image generation, and table alignment.

Also introduces `org-roam-doctor-inhibit-startup`, which speeds up `org-roam-doctor` runs.

CHANGELOG.md

@@ -21,6 +21,8 @@ In this release we support fuzzy links of the form `[[Title]]`, `[[*Headline]]`
 
 ### Bugfixes
 
+- [#1057](https://github.com/org-roam/org-roam/pull/1057) Improve performance of database builds by preventing generation of LaTeX and image previews.
+
 ## 1.2.1 (27-07-2020)
 
 This release consisted of a big deal of refactoring and bug fixes. Notably, we fixed several catastrophic failures on db builds with bad setups (#854), and modularized tag and title extractions.

doc/AUTHORS.md

@@ -34,4 +34,4 @@ Contributors
 - Rafael Accácio Nogueira <raccacio@poli.ufrj.br>
 - Roland Coeurjoly <rolandcoeurjoly@gmail.com>
 - Sayan <dit7ya@users.noreply.github.com>
-- Tim Quelch <tim@quelch.name>
+- Tim Quelch <tim@tquelch.com>

org-roam-doctor.el

@@ -59,6 +59,15 @@
 (defvar org-roam-verbose)
 (defvar org-roam-mode)
 
+(defcustom org-roam-doctor-inhibit-startup t
+  "Inhibit `org-mode' startup when processing files with `org-doctor'.
+When non-nil, images and LaTeX preview will not be generated,
+tables will not be aligned, and headlines will not respect
+startup visability. This significantly improves performance when
+processing multiple files"
+  :type 'boolean
+  :group 'org-roam)
+
 (cl-defstruct (org-roam-doctor-checker (:copier nil))
   (name 'missing-checker-name)
   (description "")
@@ -294,7 +303,8 @@ If CHECKALL, run the check for all Org-roam files."
 (defun org-roam-doctor-start (files checkers)
   "Lint FILES using CHECKERS."
   (save-window-excursion
-    (let ((existing-buffers (org-roam--get-roam-buffers)))
+    (let ((existing-buffers (org-roam--get-roam-buffers))
+          (org-inhibit-startup org-roam-doctor-inhibit-startup))
       (dolist (f files)
         (let ((buf (find-file-noselect f)))
           (org-roam-doctor--check buf checkers)

org-roam-macs.el

@@ -55,7 +55,8 @@ If FILE, set `org-roam-temp-file-name' to file and insert its contents."
     `(let ((,current-org-roam-directory org-roam-directory))
        (with-temp-buffer
          (let ((org-roam-directory ,current-org-roam-directory)
-               (org-mode-hook nil))
+               (org-mode-hook nil)
+               (org-inhibit-startup t))
            (org-mode)
            (when ,file
              (insert-file-contents ,file)