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Bug: org-preview-latex-process-alist's :latex-header should not fall bac

From: Vladimir Nikishkin
Subject: Bug: org-preview-latex-process-alist's :latex-header should not fall back to org-format-latex-header [9.3.4 (9.3.4-5-ga0f3bb-elpaplus @ /home/lockywolf/.emacs.d/elpa/org-plus-contrib-20200210/)]
Date: Wed, 29 Apr 2020 11:28:42 +0800

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See


Your bug report will be posted to the Org mailing list.

So, the problem is the following:

There are two almost unrelated latex-using processes in org. One is
export, the other one is generating previews.

The latter one is far less demanding than the former. Previews only care
about certain math, whereas exports may very well be super tricky.

Therefore, preparing org documents for export often includes setting a
separate latex compiler (in 99% of the cases lualatex or xelatex), and a
custom #+LATEX_HEADER. the latex compiler controlled with
(setq org-latex-compiler "lualatex")
(setq org-latex-bib-compiler "biber")
is completely ignored by the preview process. This is fine, since
previews only care about small things. However, #+LATEX_HEADER is _not_
ignored, which means that previews will fail to compile, since
LATEX_HEADER is prepared for a different compiler.

This can be worked around with various means, but I think that the
problem here is more general. The two processes should be either
completely amalgamated (that is the previews should not have a separate
org-preview-latex-default-process, and just take the settings from the
ones used for the export), or should be completely independent, but not
entangled by a single variable.


Emacs  : GNU Emacs 26.3 (build 1, x86_64-slackware-linux-gnu, GTK+ Version 
 of 2019-11-26
Package: Org mode version 9.3.4 (9.3.4-5-ga0f3bb-elpaplus @ 

current state:
 org-src-mode-hook '((lambda nil (modify-syntax-entry 60 ".") 
(modify-syntax-entry 62 ".")
                      (setq geiser-autodoc--inhibit t))
 org-link-shell-confirm-function 'yes-or-no-p
 org-babel-after-execute-hook '((lambda nil
                                 (if org-inline-image-overlays
                                  (progn (org-redisplay-inline-images)))
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-with-sub-superscripts '{}
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-pretty-entities t
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-agenda-files '("~/Personal_Planner/lockywolf_net.org"
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-modules '(org-habits ol-w3m ol-bbdb ol-bibtex ol-docview ol-gnus ol-info 
ol-irc ol-mhe
               ol-rmail ol-eww)
 org-plantuml-jar-path "/usr/local/bin/plantuml.jar"
 org-mode-hook '(#[0 "\301\211\207" [imenu-create-index-function 
org-imenu-get-tree] 2]
                 turn-on-org-cdlatex org-tempo-setup
                 (lambda nil
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("p" . "src plantuml :noweb no :exports both :file 
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("SO" . "src scheme :exports both :results output")))
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("SV" . "src scheme :exports both :results value")))
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("SE" . "src scheme :exports code")))
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("EL" . "src elisp :exports both :results output")))
                  (add-to-list (quote org-structure-template-alist)
                   (quote ("F" . "src f90 :exports both :results output")))
                 (lambda nil (modify-syntax-entry 60 ".") (modify-syntax-entry 
62 "."))
                 (lambda nil (imenu-add-to-menubar "Imenu"))
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook org-show-all append local] 
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook org-babel-show-result-all 
append local] 5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes 
 org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-preview-latex-default-process 'imagemagick
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3 "\n\n(fn 
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-latex-compiler "lualatex"
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe 
 org-babel-load-languages '((plantuml . t) (C . t) (scheme . t) (latex . t) 
(shell . t)
                            (fortran . t))
 org-log-done 'time
 org-startup-align-all-tables t
 org-ascii-format-drawer-function #[771 "\207" [] 4 "\n\n(fn NAME CONTENTS 
 org-src-lang-modes '(("arduino" . arduino) ("redis" . redis) ("php" . php) 
("C" . c)
                      ("C++" . c++) ("asymptote" . asy) ("bash" . sh) ("beamer" 
. latex)
                      ("calc" . fundamental) ("cpp" . c++) ("ditaa" . artist)
                      ("dot" . fundamental) ("elisp" . emacs-lisp) ("ocaml" . 
                      ("screen" . shell-script) ("shell" . sh) ("sqlite" . sql))
 org-catch-invisible-edits t
 org-occur-hook '(org-first-headline-recenter)
 org-log-into-drawer t
 org-edit-src-auto-save-idle-delay 15
 org-agenda-include-diary t
 org-structure-template-alist '(("F" . "src f90 :exports both :results output")
                                ("EL" . "src elisp :exports both :results 
                                ("SE" . "src scheme :exports code")
                                ("SV" . "src scheme :exports both :results 
                                ("SO" . "src scheme :exports both :results 
                                ("p" . "src plantuml :noweb no :exports both 
:file ")
                                ("a" . "export ascii") ("c" . "center") ("C" . 
                                ("e" . "example") ("E" . "export") ("h" . 
"export html")
                                ("l" . "export latex") ("q" . "quote") ("s" . 
                                ("v" . "verse"))
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines
 org-edit-src-turn-on-auto-save t
 org-speed-command-hook '(org-speed-command-activate 
 org-hierarchical-todo-statistics nil
 org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function
 org-babel-tangle-lang-exts '(("fortran" . "F90") ("latex" . "tex") ("D" . "d")
                              ("C++" . "cpp") ("emacs-lisp" . "el") ("elisp" . 
 org-format-latex-options '(:foreground default :background default :scale 2.0
                            :html-foreground "Black" :html-background 
                            :html-scale 1.0 :matchers ("begin" "$1" "$" "$$" 
"\\(" "\\["))
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-open-link :export
                        org-attach-export-link :complete 
                       ("id" :follow org-id-open)
                       ("eww" :follow eww :store org-eww-store-link)
                       ("rmail" :follow org-rmail-open :store 
                       ("mhe" :follow org-mhe-open :store org-mhe-store-link)
                       ("irc" :follow org-irc-visit :store org-irc-store-link 
                       ("info" :follow org-info-open :export org-info-export 
                       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
                       ("docview" :follow org-docview-open :export 
org-docview-export :store
                       ("bibtex" :follow org-bibtex-open :store 
                       ("bbdb" :follow org-bbdb-open :export org-bbdb-export 
                        org-bbdb-complete-link :store org-bbdb-store-link)
                       ("w3m" :store org-w3m-store-link) ("file+sys") 
                       ("shell" :follow org-link--open-shell)
                       (#1="news" :follow
                        #[257 #2="\301\300\302Q!\207" [#1# browse-url #4=":"] 5 
                          "\n\n(fn URL)"]
                       (#3="mailto" :follow #[257 #2# [#3# browse-url #4#] 5 
                       (#6="https" :follow #[257 #2# [#6# browse-url #4#] 5 
                       (#7="http" :follow #[257 #2# [#7# browse-url #4#] 5 #5#])
                       (#8="ftp" :follow #[257 #2# [#8# browse-url #4#] 5 #5#])
                       ("help" :follow org-link--open-help)
                       ("file" :complete org-link-complete-file)
                       ("elisp" :follow org-link--open-elisp)
                       ("doi" :follow org-link--open-doi))
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-agenda-start-with-follow-mode t
 org-link-elisp-confirm-function 'yes-or-no-p
 org-org-src-mode-hook '((lambda nil (modify-syntax-entry 60 ".")
                          (modify-syntax-entry 62 "."))
 org-tab-before-tab-emulation-hook '(org-tempo-complete-tag)
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-image-actual-width nil
 org-html-use-infojs t
 org-html-format-headline-function 'org-html-format-headline-default-function
 org-confirm-babel-evaluate 'my-org-confirm-babel-evaluate
 org-use-sub-superscripts '{}
 org-use-speed-commands t
 org-latex-bib-compiler "biber"
 org-default-notes-file "~/Personal_Planner/notes.org"
Vladimir Nikishkin (MiEr, lockywolf)

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