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I want to save an email receipt as a PDF. I type a and v (for Action and View as PDF) and get Wrong type argument: stringp, nil. How can I save a message as a PDF file?

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    You might need to put msg2pdf working in order to achieve that. Alternatively, you can open the message in your web browser and save it from there as a pdf file. – Andre Jun 23 at 13:18
  • When I launch help for mu4e-msg2pdf, I get: is a variable defined in ‘mu4e-actions.el’. Its value is nil. I installed mu with brew install mu --with-emacs and running brew upgrade --with-emacs mu gives Error: invalid option: --with-emacs. How do I reinstall mu with mu4e or msg2pdf? Or how do I get the file location of the current message on disk? – miguelmorin Jun 24 at 17:09
  • As you can see from this reddit post msg2pdf is not the easiest/most reliable way of getting a pdf. I'd use the web browser shortcut instead. – Andre Jun 26 at 13:53
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    I found how to view a message in the browser here, adding to my configuration (add-to-list 'mu4e-view-actions '("ViewInBrowser" . mu4e-action-view-in-browser) t). Do you want to write an answer? – miguelmorin Jun 26 at 14:21
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With wkhtmltopdf installed, here's a function that saves the PDF to your Desktop automatically:

(defun mu4e-action-save-to-pdf (msg)
  (let* ((date (mu4e-message-field msg :date))
         (infile (mu4e~write-body-to-html msg))
         (outfile (format-time-string "%Y-%m-%d%H%M%S.pdf" date)))
    (with-temp-buffer
      (shell-command
       (format "wkhtmltopdf %s ~/Desktop/%s" infile outfile) t))))

(add-to-list 'mu4e-view-actions '("Save to PDF" . mu4e-action-save-to-pdf) t)
  • @mmorin I replaced the call-process-shell-command function with shell-command. Can you try again. You could also replace it with print to examine the output. – jagrg Jul 1 at 12:25
  • Yes, it works now. Thanks! – miguelmorin Jul 2 at 7:59
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To get the same result, but with an additional step, I suggest to view the email in your web browser with (add-to-list 'mu4e-view-actions '("ViewInBrowser" . mu4e-action-view-in-browser) t) and to then print it to a pdf file.

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