Pandoc: Emoji support in markdown_github

[borekb]

GitHub / GFM supports emoji and it would be nice to have a Pandoc extension for it.

[borekb]

Thank you! :clap:

[miloskroulik]

This doesn't seem to be working when converting to PDF with pandoc dokumentace.md -f markdown_github -o dokumentace.pdf. Following error appears:

! Package inputenc Error: Keyboard character used is undefined
(inputenc)                in inputencoding `utf8'.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.83 ... ně odkazujeme pomocí symolů 1^^Le0f^^T

The same problem also appears with xetex. I'm using Pandoc 1.15.2

[jgm]

Please provide a minimal input file that allows the problem
to be reproduced. I just tried using a markdown file with
:smile: and --latex-engine=xelatex. It compiled fine
and gave me a PDF, though not a smile -- because the font
I'm using doesn't contain a glyph for that unicode code
point.

[miloskroulik]

I enclosed the minimal document for inspection:
emoji.md.txt

Please let me know, if this is what you're looking for. Also, is there some version of Texlive required? I'm using the packages available in Ubuntu 14.04.

EDIT: I tried to convert :smiley: and it works just fine. So it looks like that only some of the emojis are supported.

[jgm]

To simplify things: the input

:one:

suffices to reproduce the issue.

[jgm]

Looks like there's an issue with :one: in HTML output, too. I'll reopen this issue so we can look into it.

[jgm]

OK, I've fixed a bunch of bugs in the emoji character definitions.
But note also that you should use --latex-engine=xelatex, and that how the characters appear will depend on your font's support for them.
Thanks for raising this issue!

[miloskroulik]

Thanks a lot, I will try it soon.

[eivindml]

Hmm. I still have no rendering of emojis when using this. Even with --latex-enginge=xelatex. No errors, but just renders as white space.

[mb21]

@eivindml probably your font doesn't have that character...

[jgm]

+++ Eivind Lindbråten [Feb 22 17 04:38 ]:

Hmm. I still have no rendering of emojis when using this. Even with
--latex-enginge=xelatex. No errors, but just renders as white space.

Very likely the reason is that the font you're using doesn't
have glyphs for these emoji characters. Try with
--verbose; you should see some messages about this.

[eivindml]

@jgm @mb21 Ok. Thanks! Which font can I use, and how to I specify font with pandoc? On MacOS Sierra.

[mb21]

@eivindml the following might work:

echo 'hi :smile: :one:' | pandoc -f markdown+emoji --latex-engine=lualatex -o foo.pdf --variable mainfont="DejaVu Sans"

[mb720]

I tried

echo 'hi :smile: :one:' | pandoc -f markdown+emoji --pdf-engine=lualatex -o foo.pdf --variable mainfont="DejaVu Sans"

but got this error:

[WARNING] Missing character: There is no ⃣ (U+20E3) in font DejaVuSans:mode=node;script=

[jgm]

As the message indicates, you need to use a font that actually has this glyph. (See mainfont.)
Please ask questions on pandoc-discuss rather than closed issues.