Class memoir Error: Font command \sf is not supported

[ricpelo]

Problem

Trying to create a PDF version of my book using Memoir class I get the following error:

! Class memoir Error: Font command \sf is not supported.

See the memoir class documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

Surfing on the Net it seems I need to include the oldfontcommands class option, but I don't know how can I do that in Sphinx.

Procedure to reproduce the problem

$ git clone https://github.com/ricpelo/libro-dwese.git
$ cd libro-dwese
$ pip install -r requirements.txt
$ vim conf.py # (change from 'manual' to 'memoir' on line 292)
$ make latexpdf

Error logs / results

Running Sphinx v1.7.1
loading translations [es]... done
loading pickled environment... done
building [mo]: targets for 0 po files that are out of date
building [latex]: all documents
updating environment: 0 added, 0 changed, 0 removed
looking for now-outdated files... none found
processing dwese.tex...index_latex introduccion php yii2 
resolving references...
writing... done
copying TeX support files...
done
build succeeded.

The LaTeX files are in _build/latex.
Run 'make' in that directory to run these through (pdf)latex
(use `make latexpdf' here to do that automatically).
make[1]: se entra en el directorio '/home/ricardo/libro-dwese/_build/latex'
latexmk -pdf -dvi- -ps-  'dwese.tex'
Latexmk: This is Latexmk, John Collins, 1 January 2015, version: 4.41.
Rule 'pdflatex': Rules & subrules not known to be previously run:
   pdflatex
Rule 'pdflatex': The following rules & subrules became out-of-date:
      'pdflatex'
------------
Run number 1 of rule 'pdflatex'
------------
------------
Running 'xelatex   -recorder  "dwese.tex"'
------------
Latexmk: applying rule 'pdflatex'...
This is XeTeX, Version 3.14159265-2.6-0.99992 (TeX Live 2015/Debian) (preloaded format=xelatex)
 restricted \write18 enabled.
entering extended mode
(./dwese.tex
LaTeX2e <2016/02/01>
Babel <3.9q> and hyphenation patterns for 81 language(s) loaded.
(/usr/share/texlive/texmf-dist/tex/latex/memoir/memoir.cls
Document Class: memoir 2015/07/08 v3.7e configurable book, report, article docu
ment class
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(/usr/share/texlive/texmf-dist/tex/latex/cmap/cmap.sty

Package cmap Warning: pdftex not detected - exiting.

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*************************************************
* fontspec warning: "icu-feature-not-exist-in-font"
* 
* OpenType feature 'Numbers=Monospaced,Lining' (+tnum) not available for font
* 'LinLibertine_RZI' with script 'Latin' and language 'Default'.
*************************************************
*************************************************
* fontspec warning: "icu-feature-not-exist-in-font"
* 
* OpenType feature 'Numbers=Monospaced,Lining' (+tnum) not available for font
* 'LinLibertine_RZI' with script 'Latin' and language 'Default'.
*************************************************
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Package hyperref Message: Driver (autodetected): hxetex.

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Writing index file dwese.idx 
(./dwese.aux) (/usr/share/texmf/tex/latex/tipa/t3cmr.fd)
(/usr/share/texlive/texmf-dist/tex/latex/base/ts1cmr.fd)
*geometry* driver: auto-detecting
*geometry* detected driver: xetex
(/usr/share/texlive/texmf-dist/tex/latex/hyperref/nameref.sty
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/gettitlestring.sty))
Redoing nameref's sectioning
Redoing nameref's label

Package hyperref Warning: Rerun to get /PageLabels entry.

ABD: EveryShipout initializing macros
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsb.fd) [1] [2] [3] [4]

! Class memoir Error: Font command \sf is not supported.

See the memoir class documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.114 ...r{Preparación del entorno de desarrollo}

? OK, entering \batchmodeLatexmk: Index file 'dwese.idx' was written
Latexmk: References changed.
Latexmk: Missing input file: 'dwese.ind' from line
  'No file dwese.ind.'
Latexmk: References changed.
Latexmk: Log file says output to 'dwese.pdf'
Collected error summary (may duplicate other messages):
  pdflatex: Command for 'pdflatex' gave return code 256
Latexmk: Use the -f option to force complete processing,
 unless error was exceeding maximum runs of latex/pdflatex.
Latexmk: Errors, so I did not complete making targets
Makefile:32: fallo en las instrucciones para el objetivo 'dwese.pdf'
make[1]: *** [dwese.pdf] Error 12
make[1]: se sale del directorio '/home/ricardo/libro-dwese/_build/latex'
Makefile:18: fallo en las instrucciones para el objetivo 'latexpdf'
make: *** [latexpdf] Error 2

Expected results

No errors and PDF generated successfully.

Reproducible project / your project

https://github.com/ricpelo/libro-dwese

Environment info

• OS: Ubuntu 16.04.4 LTS
• Python version: 2.7.12
• Sphinx version: 1.7.1

pdfTeX 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian)
kpathsea version 6.2.1
Copyright 2015 Peter Breitenlohner (eTeX)/Han The Thanh (pdfTeX).
There is NO warranty.  Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Peter Breitenlohner (eTeX)/Han The Thanh (pdfTeX).
Compiled with libpng 1.6.17; using libpng 1.6.17
Compiled with zlib 1.2.8; using zlib 1.2.8
Compiled with poppler version 0.41.0

[tk0miya]

I don't know about memoir, but I guess latex_elements['extraclassoptions'] = 'oldfontcommands' will resolve your problem. http://www.sphinx-doc.org/en/master/config.html#confval-latex_elements

[jfbu]

Sphinx by itself never issues \sf.

I have made a grep search for grep '\\sf[^a-zA-Z]' in all the files listed in your log. I could not check titlesec.sty and titletoc.sty which originate in your home but I tested the TL2107 versions and they don't contain usage of \sf. The result is that the sole package containing usage of \sf is fncychap. But it does that only in the "Sonny" style are you using this style?

Then there is the highlighting provided by Pygments but (see here) it does not cause either a \sf LaTeX macro either in output (which would be in the sphinx-highlight.sty file).

Are you sure the \sf does not come from your own additions to preamble or to raw latex input?

Did the advice by @tk0miya work for you?

[jfbu]

ah well, yes arrrrgggghhhh

https://github.com/sphinx-doc/sphinx/blob/master/sphinx/writers/latex.py#L618-L621

Thus this is definitely a bug in Sphinx because it uses then old package fncychap with precisely its unique option which happens to use deprecated font command \sf... thanks for report!

[jfbu]

Fixed at 453d6a0b6 thanks for report.

[jfbu]

Now better fixed at https://github.com/sphinx-doc/sphinx/commit/aa21d78e42ebbc993f4f5df66755a044a95d52c8 (travis failed with Python 3.4 while setting up environment, so this is not Sphinx related)

[ricpelo]

Thank you very much!