markdown.tex

%%
%% This is file `markdown.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% markdown.dtx  (with options: `tex')
%% 
%% Copyright (C) 2016-2019 Vít Novotný
%% 
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%% The latest version of this license is in
%% 
%%    http://www.latex-project.org/lppl.txt
%% 
%% and version 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%% 
%% This work has the LPPL maintenance status `maintained'.
%% The Current Maintainer of this work is Vít Novotný.
%% 
%% Send bug reports, requests for additions and questions
%% either to the GitHub issue tracker at
%% 
%%   https://github.com/Witiko/markdown/issues
%% 
%% or to the e-mail address <witiko@mail.muni.cz>.
%% 
%% MODIFICATION ADVICE:
%% 
%% If you want to customize this file, it is best to make a copy of
%% the source file(s) from which it was produced.  Use a different
%% name for your copy(ies) and modify the copy(ies); this will ensure
%% that your modifications do not get overwritten when you install a
%% new release of the standard system.  You should also ensure that
%% your modified source file does not generate any modified file with
%% the same name as a standard file.
%% 
%% You will also need to produce your own, suitably named, .ins file to
%% control the generation of files from your source file; this file
%% should contain your own preambles for the files it generates, not
%% those in the standard .ins files.
%% 
%% The names of the source files used are shown above.
%% 
\def\markdownLastModified{2019/04/30}%
\def\markdownVersion{2.8.1}%
\let\markdownBegin\relax
\let\markdownEnd\relax
\let\markdownInput\relax
\def\markdownOptionHelperScriptFileName{\jobname.markdown.lua}%
\def\markdownOptionInputTempFileName{\jobname.markdown.in}%
\def\markdownOptionOutputTempFileName{\jobname.markdown.out}%
\def\markdownOptionErrorTempFileName{\jobname.markdown.err}%
\def\markdownOptionOutputDir{.}%
\def\markdownOptionCacheDir{\markdownOptionOutputDir/_markdown_\jobname}%
\let\markdownOptionBlankBeforeBlockquote\undefined
\let\markdownOptionBlankBeforeCodeFence\undefined
\let\markdownOptionBlankBeforeHeading\undefined
\let\markdownOptionBreakableBlockquotes\undefined
\let\markdownOptionCitations\undefined
\let\markdownOptionCitationNbsps\undefined
\let\markdownOptionContentBlocks\undefined
\let\markdownOptionContentBlocksLanguageMap\undefined
\let\markdownOptionDefinitionLists\undefined
\let\markdownOptionFootnotes\undefined
\let\markdownOptionFencedCode\undefined
\let\markdownOptionHashEnumerators\undefined
\let\markdownOptionHeaderAttributes\undefined
\let\markdownOptionHtml\undefined
\let\markdownOptionHybrid\undefined
\let\markdownOptionInlineFootnotes\undefined
\let\markdownOptionPipeTables\undefined
\let\markdownOptionPreserveTabs\undefined
\let\markdownOptionShiftHeadings\undefined
\let\markdownOptionSlice\undefined
\let\markdownOptionSmartEllipses\undefined
\let\markdownOptionStartNumber\undefined
\let\markdownOptionTableCaptions\undefined
\let\markdownOptionTightLists\undefined
\def\markdownOptionStripPercentSigns{false}%
\def\markdownIfOption#1{%
  \def\next##1##2##3##4##5{%
    \expandafter\def\expandafter\next\expandafter{%
      \csname iffalse\endcsname}%
    \if##1t\if##2r\if##3u\if##4e
      \expandafter\def\expandafter\next\expandafter{%
        \csname iftrue\endcsname}%
    \fi\fi\fi\fi
    \next}%
  \expandafter\expandafter\expandafter\next
    \csname markdownOption#1\endcsname\relax\relax\relax\relax\relax}
\def\markdownRendererInterblockSeparator{%
  \markdownRendererInterblockSeparatorPrototype}%
\def\markdownRendererLineBreak{%
  \markdownRendererLineBreakPrototype}%
\def\markdownRendererEllipsis{%
  \markdownRendererEllipsisPrototype}%
\def\markdownRendererNbsp{%
  \markdownRendererNbspPrototype}%
\def\markdownRendererLeftBrace{%
  \markdownRendererLeftBracePrototype}%
\def\markdownRendererRightBrace{%
  \markdownRendererRightBracePrototype}%
\def\markdownRendererDollarSign{%
  \markdownRendererDollarSignPrototype}%
\def\markdownRendererPercentSign{%
  \markdownRendererPercentSignPrototype}%
\def\markdownRendererAmpersand{%
  \markdownRendererAmpersandPrototype}%
\def\markdownRendererUnderscore{%
  \markdownRendererUnderscorePrototype}%
\def\markdownRendererHash{%
  \markdownRendererHashPrototype}%
\def\markdownRendererCircumflex{%
  \markdownRendererCircumflexPrototype}%
\def\markdownRendererBackslash{%
  \markdownRendererBackslashPrototype}%
\def\markdownRendererTilde{%
  \markdownRendererTildePrototype}%
\def\markdownRendererPipe{%
  \markdownRendererPipePrototype}%
\def\markdownRendererCodeSpan{%
  \markdownRendererCodeSpanPrototype}%
\def\markdownRendererLink{%
  \markdownRendererLinkPrototype}%
\def\markdownRendererImage{%
  \markdownRendererImagePrototype}%
\def\markdownRendererContentBlock{%
  \markdownRendererContentBlockPrototype}%
\def\markdownRendererContentBlockOnlineImage{%
  \markdownRendererContentBlockOnlineImagePrototype}%
\def\markdownRendererContentBlockCode{%
  \markdownRendererContentBlockCodePrototype}%
\def\markdownRendererUlBegin{%
  \markdownRendererUlBeginPrototype}%
\def\markdownRendererUlBeginTight{%
  \markdownRendererUlBeginTightPrototype}%
\def\markdownRendererUlItem{%
  \markdownRendererUlItemPrototype}%
\def\markdownRendererUlItemEnd{%
  \markdownRendererUlItemEndPrototype}%
\def\markdownRendererUlEnd{%
  \markdownRendererUlEndPrototype}%
\def\markdownRendererUlEndTight{%
  \markdownRendererUlEndTightPrototype}%
\def\markdownRendererOlBegin{%
  \markdownRendererOlBeginPrototype}%
\def\markdownRendererOlBeginTight{%
  \markdownRendererOlBeginTightPrototype}%
\def\markdownRendererOlItem{%
  \markdownRendererOlItemPrototype}%
\def\markdownRendererOlItemEnd{%
  \markdownRendererOlItemEndPrototype}%
\def\markdownRendererOlItemWithNumber{%
  \markdownRendererOlItemWithNumberPrototype}%
\def\markdownRendererOlEnd{%
  \markdownRendererOlEndPrototype}%
\def\markdownRendererOlEndTight{%
  \markdownRendererOlEndTightPrototype}%
\def\markdownRendererDlBegin{%
  \markdownRendererDlBeginPrototype}%
\def\markdownRendererDlBeginTight{%
  \markdownRendererDlBeginTightPrototype}%
\def\markdownRendererDlItem{%
  \markdownRendererDlItemPrototype}%
\def\markdownRendererDlItemEnd{%
  \markdownRendererDlItemEndPrototype}%
\def\markdownRendererDlDefinitionBegin{%
  \markdownRendererDlDefinitionBeginPrototype}%
\def\markdownRendererDlDefinitionEnd{%
  \markdownRendererDlDefinitionEndPrototype}%
\def\markdownRendererDlEnd{%
  \markdownRendererDlEndPrototype}%
\def\markdownRendererDlEndTight{%
  \markdownRendererDlEndTightPrototype}%
\def\markdownRendererEmphasis{%
  \markdownRendererEmphasisPrototype}%
\def\markdownRendererStrongEmphasis{%
  \markdownRendererStrongEmphasisPrototype}%
\def\markdownRendererBlockQuoteBegin{%
  \markdownRendererBlockQuoteBeginPrototype}%
\def\markdownRendererBlockQuoteEnd{%
  \markdownRendererBlockQuoteEndPrototype}%
\def\markdownRendererInputVerbatim{%
  \markdownRendererInputVerbatimPrototype}%
\def\markdownRendererInputFencedCode{%
  \markdownRendererInputFencedCodePrototype}%
\def\markdownRendererHeadingOne{%
  \markdownRendererHeadingOnePrototype}%
\def\markdownRendererHeadingTwo{%
  \markdownRendererHeadingTwoPrototype}%
\def\markdownRendererHeadingThree{%
  \markdownRendererHeadingThreePrototype}%
\def\markdownRendererHeadingFour{%
  \markdownRendererHeadingFourPrototype}%
\def\markdownRendererHeadingFive{%
  \markdownRendererHeadingFivePrototype}%
\def\markdownRendererHeadingSix{%
  \markdownRendererHeadingSixPrototype}%
\def\markdownRendererHorizontalRule{%
  \markdownRendererHorizontalRulePrototype}%
\def\markdownRendererFootnote{%
  \markdownRendererFootnotePrototype}%
\def\markdownRendererCite{%
  \markdownRendererCitePrototype}%
\def\markdownRendererTextCite{%
  \markdownRendererTextCitePrototype}%
\def\markdownRendererTable{%
  \markdownRendererTablePrototype}%
\def\markdownRendererInterblockSeparatorPrototype{}%
\def\markdownRendererLineBreakPrototype{}%
\def\markdownRendererEllipsisPrototype{}%
\def\markdownRendererNbspPrototype{}%
\def\markdownRendererLeftBracePrototype{}%
\def\markdownRendererRightBracePrototype{}%
\def\markdownRendererDollarSignPrototype{}%
\def\markdownRendererPercentSignPrototype{}%
\def\markdownRendererAmpersandPrototype{}%
\def\markdownRendererUnderscorePrototype{}%
\def\markdownRendererHashPrototype{}%
\def\markdownRendererCircumflexPrototype{}%
\def\markdownRendererBackslashPrototype{}%
\def\markdownRendererTildePrototype{}%
\def\markdownRendererPipePrototype{}%
\def\markdownRendererCodeSpanPrototype#1{}%
\def\markdownRendererLinkPrototype#1#2#3#4{}%
\def\markdownRendererImagePrototype#1#2#3#4{}%
\def\markdownRendererContentBlockPrototype#1#2#3#4{}%
\def\markdownRendererContentBlockOnlineImagePrototype#1#2#3#4{}%
\def\markdownRendererContentBlockCodePrototype#1#2#3#4#5{}%
\def\markdownRendererUlBeginPrototype{}%
\def\markdownRendererUlBeginTightPrototype{}%
\def\markdownRendererUlItemPrototype{}%
\def\markdownRendererUlItemEndPrototype{}%
\def\markdownRendererUlEndPrototype{}%
\def\markdownRendererUlEndTightPrototype{}%
\def\markdownRendererOlBeginPrototype{}%
\def\markdownRendererOlBeginTightPrototype{}%
\def\markdownRendererOlItemPrototype{}%
\def\markdownRendererOlItemWithNumberPrototype#1{}%
\def\markdownRendererOlItemEndPrototype{}%
\def\markdownRendererOlEndPrototype{}%
\def\markdownRendererOlEndTightPrototype{}%
\def\markdownRendererDlBeginPrototype{}%
\def\markdownRendererDlBeginTightPrototype{}%
\def\markdownRendererDlItemPrototype#1{}%
\def\markdownRendererDlItemEndPrototype{}%
\def\markdownRendererDlDefinitionBeginPrototype{}%
\def\markdownRendererDlDefinitionEndPrototype{}%
\def\markdownRendererDlEndPrototype{}%
\def\markdownRendererDlEndTightPrototype{}%
\def\markdownRendererEmphasisPrototype#1{}%
\def\markdownRendererStrongEmphasisPrototype#1{}%
\def\markdownRendererBlockQuoteBeginPrototype{}%
\def\markdownRendererBlockQuoteEndPrototype{}%
\def\markdownRendererInputVerbatimPrototype#1{}%
\def\markdownRendererInputFencedCodePrototype#1#2{}%
\def\markdownRendererHeadingOnePrototype#1{}%
\def\markdownRendererHeadingTwoPrototype#1{}%
\def\markdownRendererHeadingThreePrototype#1{}%
\def\markdownRendererHeadingFourPrototype#1{}%
\def\markdownRendererHeadingFivePrototype#1{}%
\def\markdownRendererHeadingSixPrototype#1{}%
\def\markdownRendererHorizontalRulePrototype{}%
\def\markdownRendererFootnotePrototype#1{}%
\def\markdownRendererCitePrototype#1{}%
\def\markdownRendererTextCitePrototype#1{}%
\def\markdownRendererTablePrototype#1#2#3{}%
\def\markdownInfo#1{}%
\def\markdownWarning#1{}%
\def\markdownError#1#2{}%
\let\markdownMakeOther\relax
\let\markdownReadAndConvert\relax
\begingroup
  \catcode`\|=0\catcode`\\=12%
  |gdef|markdownBegin{%
    |markdownReadAndConvert{\markdownEnd}%
                           {|markdownEnd}}%
|endgroup
\ifx\markdownMode\undefined
  \ifx\directlua\undefined
    \def\markdownMode{0}%
  \else
    \def\markdownMode{2}%
  \fi
\fi
\def\markdownLuaRegisterIBCallback#1{\relax}%
\def\markdownLuaUnregisterIBCallback#1{\relax}%
\def\markdownInfo#1{%
  \immediate\write-1{(l.\the\inputlineno) markdown.tex info: #1.}}%
\def\markdownWarning#1{%
  \immediate\write16{(l.\the\inputlineno) markdown.tex warning: #1}}%
\def\markdownError#1#2{%
  \errhelp{#2.}%
  \errmessage{(l.\the\inputlineno) markdown.tex error: #1}}%
\def\markdownRendererInterblockSeparatorPrototype{\par}%
\def\markdownRendererLineBreakPrototype{\hfil\break}%
\let\markdownRendererEllipsisPrototype\dots
\def\markdownRendererNbspPrototype{~}%
\def\markdownRendererLeftBracePrototype{\char`\{}%
\def\markdownRendererRightBracePrototype{\char`\}}%
\def\markdownRendererDollarSignPrototype{\char`$}%
\def\markdownRendererPercentSignPrototype{\char`\%}%
\def\markdownRendererAmpersandPrototype{\char`&}%
\def\markdownRendererUnderscorePrototype{\char`_}%
\def\markdownRendererHashPrototype{\char`\#}%
\def\markdownRendererCircumflexPrototype{\char`^}%
\def\markdownRendererBackslashPrototype{\char`\\}%
\def\markdownRendererTildePrototype{\char`~}%
\def\markdownRendererPipePrototype{|}%
\def\markdownRendererCodeSpanPrototype#1{{\tt#1}}%
\def\markdownRendererLinkPrototype#1#2#3#4{#2}%
\def\markdownRendererContentBlockPrototype#1#2#3#4{%
  \markdownInput{#3}}%
\def\markdownRendererContentBlockOnlineImagePrototype{%
  \markdownRendererImage}%
\def\markdownRendererContentBlockCodePrototype#1#2#3#4#5{%
  \markdownRendererInputFencedCode{#3}{#2}}%
\def\markdownRendererImagePrototype#1#2#3#4{#2}%
\def\markdownRendererUlBeginPrototype{}%
\def\markdownRendererUlBeginTightPrototype{}%
\def\markdownRendererUlItemPrototype{}%
\def\markdownRendererUlItemEndPrototype{}%
\def\markdownRendererUlEndPrototype{}%
\def\markdownRendererUlEndTightPrototype{}%
\def\markdownRendererOlBeginPrototype{}%
\def\markdownRendererOlBeginTightPrototype{}%
\def\markdownRendererOlItemPrototype{}%
\def\markdownRendererOlItemWithNumberPrototype#1{}%
\def\markdownRendererOlItemEndPrototype{}%
\def\markdownRendererOlEndPrototype{}%
\def\markdownRendererOlEndTightPrototype{}%
\def\markdownRendererDlBeginPrototype{}%
\def\markdownRendererDlBeginTightPrototype{}%
\def\markdownRendererDlItemPrototype#1{#1}%
\def\markdownRendererDlItemEndPrototype{}%
\def\markdownRendererDlDefinitionBeginPrototype{}%
\def\markdownRendererDlDefinitionEndPrototype{\par}%
\def\markdownRendererDlEndPrototype{}%
\def\markdownRendererDlEndTightPrototype{}%
\def\markdownRendererEmphasisPrototype#1{{\it#1}}%
\def\markdownRendererStrongEmphasisPrototype#1{{\bf#1}}%
\def\markdownRendererBlockQuoteBeginPrototype{\par\begingroup\it}%
\def\markdownRendererBlockQuoteEndPrototype{\endgroup\par}%
\def\markdownRendererInputVerbatimPrototype#1{%
  \par{\tt\input#1\relax{}}\par}%
\def\markdownRendererInputFencedCodePrototype#1#2{%
  \markdownRendererInputVerbatimPrototype{#1}}%
\def\markdownRendererHeadingOnePrototype#1{#1}%
\def\markdownRendererHeadingTwoPrototype#1{#1}%
\def\markdownRendererHeadingThreePrototype#1{#1}%
\def\markdownRendererHeadingFourPrototype#1{#1}%
\def\markdownRendererHeadingFivePrototype#1{#1}%
\def\markdownRendererHeadingSixPrototype#1{#1}%
\def\markdownRendererHorizontalRulePrototype{}%
\def\markdownRendererFootnotePrototype#1{#1}%
\def\markdownRendererCitePrototype#1{}%
\def\markdownRendererTextCitePrototype#1{}%
\def\markdownLuaOptions{{%
\ifx\markdownOptionBlankBeforeBlockquote\undefined\else
  blankBeforeBlockquote = \markdownOptionBlankBeforeBlockquote,
\fi
\ifx\markdownOptionBlankBeforeCodeFence\undefined\else
  blankBeforeCodeFence = \markdownOptionBlankBeforeCodeFence,
\fi
\ifx\markdownOptionBlankBeforeHeading\undefined\else
  blankBeforeHeading = \markdownOptionBlankBeforeHeading,
\fi
\ifx\markdownOptionBreakableBlockquotes\undefined\else
  breakableBlockquotes = \markdownOptionBreakableBlockquotes,
\fi
  cacheDir = "\markdownOptionCacheDir",
\ifx\markdownOptionCitations\undefined\else
  citations = \markdownOptionCitations,
\fi
\ifx\markdownOptionCitationNbsps\undefined\else
  citationNbsps = \markdownOptionCitationNbsps,
\fi
\ifx\markdownOptionCodeSpans\undefined\else
  codeSpans = \markdownOptionCodeSpans,
\fi
\ifx\markdownOptionContentBlocks\undefined\else
  contentBlocks = \markdownOptionContentBlocks,
\fi
\ifx\markdownOptionContentBlocksLanguageMap\undefined\else
  contentBlocksLanguageMap =
    "\markdownOptionContentBlocksLanguageMap",
\fi
\ifx\markdownOptionDefinitionLists\undefined\else
  definitionLists = \markdownOptionDefinitionLists,
\fi
\ifx\markdownOptionFootnotes\undefined\else
  footnotes = \markdownOptionFootnotes,
\fi
\ifx\markdownOptionFencedCode\undefined\else
  fencedCode = \markdownOptionFencedCode,
\fi
\ifx\markdownOptionHashEnumerators\undefined\else
  hashEnumerators = \markdownOptionHashEnumerators,
\fi
\ifx\markdownOptionHeaderAttributes\undefined\else
  headerAttributes = \markdownOptionHeaderAttributes,
\fi
\ifx\markdownOptionHtml\undefined\else
  html = \markdownOptionHtml,
\fi
\ifx\markdownOptionHybrid\undefined\else
  hybrid = \markdownOptionHybrid,
\fi
\ifx\markdownOptionInlineFootnotes\undefined\else
  inlineFootnotes = \markdownOptionInlineFootnotes,
\fi
\ifx\markdownOptionPipeTables\undefined\else
  pipeTables = \markdownOptionPipeTables,
\fi
\ifx\markdownOptionPreserveTabs\undefined\else
  preserveTabs = \markdownOptionPreserveTabs,
\fi
\ifx\markdownOptionShiftHeadings\undefined\else
  shiftHeadings = "\markdownOptionShiftHeadings",
\fi
\ifx\markdownOptionSlice\undefined\else
  slice = "\markdownOptionSlice",
\fi
\ifx\markdownOptionSmartEllipses\undefined\else
  smartEllipses = \markdownOptionSmartEllipses,
\fi
\ifx\markdownOptionStartNumber\undefined\else
  startNumber = \markdownOptionStartNumber,
\fi
\ifx\markdownOptionTableCaptions\undefined\else
  tableCaptions = \markdownOptionTableCaptions,
\fi
\ifx\markdownOptionTightLists\undefined\else
  tightLists = \markdownOptionTightLists,
\fi
\ifx\markdownOptionUnderscores\undefined\else
  underscores = \markdownOptionUnderscores,
\fi}
}%
\def\markdownPrepare{%
local lfs = require("lfs")
local cacheDir = "\markdownOptionCacheDir"
if not lfs.isdir(cacheDir) then
  assert(lfs.mkdir(cacheDir))
end
local md = require("markdown")
local convert = md.new(\markdownLuaOptions)
}%
\csname newread\endcsname\markdownInputFileStream
\csname newwrite\endcsname\markdownOutputFileStream
\begingroup
  \catcode`\^^I=12%
  \gdef\markdownReadAndConvertTab{^^I}%
\endgroup
\begingroup
  \catcode`\^^M=13%
  \catcode`\^^I=13%
  \catcode`|=0%
  \catcode`\\=12%
  |catcode`@=14%
  |catcode`|%=12@
  |gdef|markdownReadAndConvert#1#2{@
    |begingroup@
    |immediate|openout|markdownOutputFileStream@
      |markdownOptionInputTempFileName|relax@
    |markdownInfo{Buffering markdown input into the temporary @
      input file "|markdownOptionInputTempFileName" and scanning @
      for the closing token sequence "#1"}@
    |def|do##1{|catcode`##1=12}|dospecials@
    |catcode`| =12@
    |markdownMakeOther@
    |def|markdownReadAndConvertStripPercentSign##1{@
      |markdownIfOption{StripPercentSigns}@
        |if##1%@
          |expandafter|expandafter|expandafter@
            |markdownReadAndConvertProcessLine@
        |else@
          |expandafter|expandafter|expandafter@
            |markdownReadAndConvertProcessLine@
            |expandafter|expandafter|expandafter##1@
        |fi@
      |else@
        |expandafter@
          |markdownReadAndConvertProcessLine@
          |expandafter##1@
      |fi}@
    |def|markdownReadAndConvertProcessLine##1#1##2#1##3|relax{@
      |ifx|relax##3|relax@
        |immediate|write|markdownOutputFileStream{##1}@
      |else@
        |def^^M{@
          |markdownInfo{The ending token sequence was found}@
          |immediate|closeout|markdownOutputFileStream@
          |endgroup@
          |markdownInput|markdownOptionInputTempFileName@
          #2}@
      |fi@
      ^^M}@
    |catcode`|^^I=13@
    |def^^I{|markdownReadAndConvertTab}@
    |catcode`|^^M=13@
    |def^^M##1^^M{@
      |def^^M####1^^M{@
        |markdownReadAndConvertStripPercentSign####1#1#1|relax}@
      ^^M}@
    ^^M}@
|endgroup
\ifnum\markdownMode<2\relax
\ifnum\markdownMode=0\relax
  \markdownInfo{Using mode 0: Shell escape via write18}%
\else
  \markdownInfo{Using mode 1: Shell escape via os.execute}%
\fi
\ifx\pdfshellescape\undefined
  \ifx\shellescape\undefined
    \ifnum\markdownMode=0\relax
      \def\markdownExecuteShellEscape{1}%
    \else
      \def\markdownExecuteShellEscape{%
        \directlua{tex.sprint(status.shell_escape or "1")}}%
    \fi
  \else
    \let\markdownExecuteShellEscape\shellescape
  \fi
\else
  \let\markdownExecuteShellEscape\pdfshellescape
\fi
\ifnum\markdownMode=0\relax
  \def\markdownExecuteDirect#1{\immediate\write18{#1}}%
\else
  \def\markdownExecuteDirect#1{%
    \directlua{os.execute("\luaescapestring{#1}")}}%
\fi
\def\markdownExecute#1{%
  \ifnum\markdownExecuteShellEscape=1\relax
    \markdownExecuteDirect{#1}%
  \else
    \markdownError{I can not access the shell}{Either run the TeX
      compiler with the --shell-escape or the --enable-write18 flag,
      or set shell_escape=t in the texmf.cnf file}%
  \fi}%
\begingroup
  \catcode`|=0%
  \catcode`\\=12%
  |gdef|markdownLuaExecute#1{%
    |immediate|openout|markdownOutputFileStream=%
      |markdownOptionHelperScriptFileName
    |markdownInfo{Writing a helper Lua script to the file
      "|markdownOptionHelperScriptFileName"}%
    |immediate|write|markdownOutputFileStream{%
      local ran_ok, error = pcall(function()
        local kpse = require("kpse")
        kpse.set_program_name("luatex")
        #1
      end)
      if not ran_ok then
        local file = io.open("%
          |markdownOptionOutputDir
          /|markdownOptionErrorTempFileName", "w")
        if file then
          file:write(error .. "\n")
          file:close()
        end
        print('\\markdownError{An error was encountered while executing
               Lua code}{For further clues, examine the file
               "|markdownOptionOutputDir
               /|markdownOptionErrorTempFileName"}')
      end}%
    |immediate|closeout|markdownOutputFileStream
    |markdownInfo{Executing a helper Lua script from the file
      "|markdownOptionHelperScriptFileName" and storing the result in the
      file "|markdownOptionOutputTempFileName"}%
    |markdownExecute{texlua "|markdownOptionOutputDir
      /|markdownOptionHelperScriptFileName" > %
      "|markdownOptionOutputDir
      /|markdownOptionOutputTempFileName"}%
    |input|markdownOptionOutputTempFileName|relax}%
|endgroup
\else
\markdownInfo{Using mode 2: Direct Lua access}%
\def\markdownLuaExecute#1{\directlua{local print = tex.print #1}}%
\fi
\begingroup
  \catcode`|=0%
  \catcode`\\=12%
  |gdef|markdownInput#1{%
    |markdownInfo{Including markdown document "#1"}%
    |openin|markdownInputFileStream#1
    |closein|markdownInputFileStream
    |markdownLuaExecute{%
      |markdownPrepare
      local input = assert(io.open("%
        |markdownOptionOutputDir
        /#1", "r"):read("*a"))
      print(convert(input:gsub("\r\n?", "\n")))}}%
|endgroup
\endinput
%%
%% End of file `markdown.tex'.