Fix llncs.tex

[mfhepp]

Hi,
I found your code super-useful for setting up my own Markdown-centric research workflow. Now, there are a few caveats as Pandoc has evolved quite a bit.

First of all, you must insert the following code, taken from mpark/wg21#54 (comment), below line 142 of templates/llncs.tex:

$if(csl-refs)$
\newlength{\cslhangindent}
\setlength{\cslhangindent}{1.5em}
\newlength{\csllabelwidth}
\setlength{\csllabelwidth}{3em}
\newenvironment{CSLReferences}[3] % #1 hanging-ident, #2 entry spacing
 {% don't indent paragraphs
  \setlength{\parindent}{0pt}
  % turn on hanging indent if param 1 is 1
  \ifodd #1 \everypar{\setlength{\hangindent}{\cslhangindent}}\ignorespaces\fi
  % set entry spacing
  \ifnum #2 > 0
  \setlength{\parskip}{#2\baselineskip}
  \fi
 }%
 {}
\usepackage{calc} % for \widthof, \maxof
\newcommand{\CSLBlock}[1]{#1\hfill\break}
\newcommand{\CSLLeftMargin}[1]{\parbox[t]{\maxof{\widthof{#1}}{\csllabelwidth}}{#1}}
\newcommand{\CSLRightInline}[1]{\parbox[t]{\linewidth}{#1}}
\newcommand{\CSLIndent}[1]{\hspace{\cslhangindent}#1}
$endif$

This is because Pandoc has changed and now requires these additional variables. Likely, you will also have to apply this to the ACM and IEEE templates, but I haven't tried that yet.

Second, the citeproc filter is now (2.11.4) part of pandoc and no longer an external component; hence, the build instructions in the makefile must be changed like so (this is my local version, not exactly yours):

pandoc  --wrap=preserve \
	--citeproc \
	--filter pandoc-crossref \
	--csl=./styles/llncs.csl \
	--number-sections \
	--template=./templates/llncs.latex \
	-o output/lncs-paper.pdf paper.md
rm ./llncs.cls

Third, the pandoc-crossref binaries work only with a matching pandoc version. Unfortunately, if you use condaas a package manager, as of today, the available versions for both don't match and the 0.3.9.0 version of pandoc--crossrefavailable from conda-forge does not run on OSX Big Sur.

I solved this by installing the latest binary locally as part of my workflow and use the local path, like so:

pandoc  --wrap=preserve \
	--citeproc \
	--filter ./pandoc-crossref/pandoc-crossref \
	--csl=./styles/llncs.csl \
	--number-sections \
	--template=./templates/llncs.latex \
	-o output/lncs-paper.pdf paper.md
rm ./llncs.cls

[mfhepp]

BTW: The original link to pandoc is here: jgm/pandoc@0fe635d

[thomas-schuster]

Did you try the other templates now? Did it work out?

I just started with pandoc and thought I could use this project as a template but for now I am kind of debugging from one error to the next one. Currently:

! LaTeX Error: Environment CSLReferences undefined.
...
l.380 \begin{CSLReferences}

[BeauJoh]

Hi @thomas-schuster, I'm sorry my templates and workflow aren't working for you out of the box.
It did work well for me, I wrote a few papers and my thesis from these tools and it supported a number of latex styles.
Unfortunately, with my work at the moment I've let this codebase slide. If I find time tomorrow I'll apply @mfhepp's suggestions and try to update the workflow (but no promises). If you can fix it yourself, I'd appreciate a pull request :)