4

I'm looking for a way to automatically have my computer generate and print PDF files from a folder full of markdown files.

So, every morning at 5AM I'd want my computer look at my /markdown-files folder, create a bunch of PDFs to go into a /PDF-folder and also run the printer so the pages are waiting for me.

There are a couple of requirements that might make this a bit tricky:

  1. The PDFs should have the file title at the top of each page
  2. The page needs to be A4
  3. The lines should be double spaced at least.

I used to use WKPDF to generate PDFs, but it no longer works on Yosemite.

5

You can do this with Markdown.pl and htmldoc(1), both of which can be installed with Homebrew. The basic flow for making a PDF is:

markdown foo.markdown | htmldoc --no-toc --no-title -f foo.pdf -

As for your filename-per-page, you coul incorporate echo to add it as an HTML element:

echo $(markdown foo.markdown) "<p>foo</p>" | htmldoc --no-toc --no-title -f foo.pdf -

And for printing, the lpr(1) command will send a file to your default printer.

Tying this altogether:

for filename in `ls *.markdown`;
do
    echo $(markdown "$filename") "<p>$filename</p>" | 
        htmldoc --no-toc --no-title -f "${filename}.pdf" -
    lpr "${filename}.pdf"
done
  • Thanks for your help. I've played with htmldoc and can see how to get it to do what I want, but you'll have to forgive me, because I'm not sure where to put that piece of code to actually have it run at a particular time. – CGP Grey Jan 27 '15 at 21:52
  • 1
    Edit: Hazel to the rescue! – CGP Grey Jan 27 '15 at 21:57
  • 1
    Great! I would have suggested a cronjob, but Hazel is much friendlier. – Drew Stephens Jan 27 '15 at 22:05
  • There is still one problem: this loop just prints the first file over and over, not all the files once. for filename in ls *.md; do echo $(markdown $filename) "<p>$filename</p>" | htmldoc --no-toc --no-title --fontspacing 3 --size a4 -f ${filename}.pdf -lpr ${filename}.pdf done – CGP Grey Jan 27 '15 at 22:18
  • 1
    I think I just realized that this is my own dumb fault for having pipes in my file names. – CGP Grey Jan 27 '15 at 22:49
2

Here's a solution that uses LaTeX to generate the PDF. If you have long-form text in the Markdown files and would like to optimize for typographic readability (and I suspect you do), LaTeX tends to do a much better job compared to HTML engines.

It uses pandoc as an intermediary between Markdown and LaTeX, and also produces the PDF for you.

Main script

#!/bin/bash

md-dir="MARKDOWN_DIRECTORY_HERE"
pdf-dir="PDF_DIRECTORY_HERE"

cd "${md-dir}"
for filename in *.md; do
    target-pdf="${pdf-dir}/${filename}.pdf"
    pandoc "${filename}" -t latex --latex-engine=xelatex -V geometry=a4paper -V fontsize=11pt -V listings -V header-includes="\usepackage{fancyhdr}\pagestyle{fancyplain}\cfoot{}\rhead{\thepage}\lhead{\texttt{\lstinline/${filename}/}}" -V header-includes="\linespread{2.0}" -o "${target-pdf}"
    echo "produced ${filename}.pdf"
    lpr "${target-pdf}"
done

Required setup

  1. Get pandoc from Homebrew: brew install pandoc
  2. Install the minimal version of LaTeX called BasicTeX

Testing if you got the setup correct

You should be able to run in a new Terminal window (with bash)

echo "test" | pandoc -t latex --latex-engine=xelatex -o test.pdf

and get a valid test.pdf document with just the word "test"

Customizations

There's a lot you can tweak with the LaTeX settings from the command line

  1. tweak the line spacing by changing the \linespread{2.0} multiplier
  2. adjust markings by replacing geometry=a4paper with geometry=a4paper,left=XXmm,right=XXmm,top=XXmm,bottom=XXmm
  3. change font size by chaining 11pt to either 10pt or 12pt, and everything should scale accordingly
  4. change the main font by adding another argument to pandoc: -V mainfont="NAME OF FONT". You can also set monofont this way.
  • It would be more maintainable to just \input{my-template-file} from the command line. – Sean Allred Jan 31 '15 at 5:01
  • Very interesting. I'll play around with the option. Thank you. – CGP Grey Feb 23 '15 at 8:28
  • Running the test yields: "pandoc: xelatex not found. xelatex is needed for pdf output." – CGP Grey Nov 13 '15 at 5:15
  • Just want to make sure: this is after installing the BasicTeX package as described above, right? Are you able to run "xelatex" or "pdflatex" normally from the terminal? – Tim Lin Apr 16 '16 at 23:37
-1

I have not used WKPDF, but its author suggests a method by which it can be made to work in Yosemite: https://github.com/plessl/wkpdf/wiki/How-to-install-on-MacOS-10.10-Yosemite

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

  • RVM: command not found. – CGP Grey Jan 27 '15 at 21:34
-1

You could use PhantomJS. It's not as straight forward as WKPDF for PDF generation since it has a wider range of features, but works fine.

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