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Detect latexmk is running on currently buffer.

From: Hongyi Zhao
Subject: Detect latexmk is running on currently buffer.
Date: Mon, 11 Oct 2021 21:22:56 +0800

Currently, I'm using the following configuration to automate the LaTeX
workflow in Emacs with AUCTeX:

;; Automatically revert a buffer when the corresponding file on disk is updated.
(global-auto-revert-mode 1)
(setq auto-revert-use-notify nil)

;; Automatically save the buffer to disk periodically.
(use-package real-auto-save
   :hook ((TeX-mode python-mode) . real-auto-save-mode)
  (setq real-auto-save-interval 5) ;; in seconds

;; After the buffer is changed and saved to disk, run latexmk on the
;; corresponding file immediately.
;;See ~/.latexmkrc for correspoding configuration
(use-package smart-compile
  (declare-function smart-compile-string "smart-compile")
  (defun run-latexmk ()
    (when (string-match ".tex$" (buffer-file-name))
      (let ((buf (get-buffer "*Background TeX proccess*")))
    (if (bufferp buf) (kill-buffer buf))) ;; flush previous log
       "Background TeX" "*Background TeX proccess*"
       ;; use an external application as the previewer
       ;;(smart-compile-string "latexmk -pv %f")

       ;; use pdf-tools
       (smart-compile-string "latexmk %f")
  (define-minor-mode AutoTeX-mode
    "Mode for compiling latex sources and creating PDFs after saving."
    :global nil
    :lighter " Auto"
    (if AutoTeX-mode
    (add-hook 'after-save-hook 'run-latexmk t t)
      (remove-hook 'after-save-hook 'run-latexmk t)))

  :hook (LaTeX-mode . (lambda () (AutoTeX-mode 1)))

Though the above method works, I meet a problem when the project LaTeX
files are large to some extent. To be more specific, when the project
is large to a certain extent, the compilation time of latexmk will be
relatively long, which may lead to the following race condition: When
the previous latexmk process has not ended, the subsequent latexmk
process is launched again.

Any hints for fixing this problem?

Assoc. Prof. Hongyi Zhao <>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province

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