From 3ee5a99a4a80a83f9199e1dfe1c1ef4c9d971d67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADt=20Novotn=C3=BD?= <witiko@mail.muni.cz>
Date: Thu, 26 Aug 2021 21:18:58 +0200
Subject: [PATCH] Add index to the documentation

---
 latexmkrc    |  1 +
 markdown.dtx | 46 ++++++++++++++++++++++++++++++++++------------
 markdown.ist |  3 +++
 3 files changed, 38 insertions(+), 12 deletions(-)
 create mode 100644 markdown.ist

diff --git a/latexmkrc b/latexmkrc
index 34d796211..a9b6a23ef 100644
--- a/latexmkrc
+++ b/latexmkrc
@@ -1,4 +1,5 @@
 $pdflatex = 'lualatex --shell-escape %O %S';
+$makeindex = 'makeindex -s %R.ist %O -o %D %S';
 $pdf_mode = 1;
 $postscript_mode = 0;
 $dvi_mode = 0;
diff --git a/markdown.dtx b/markdown.dtx
index 7a5472d2a..52d39d5a3 100644
--- a/markdown.dtx
+++ b/markdown.dtx
@@ -30,29 +30,50 @@
 
 % Define some markup.
 \let\pkg\relax % A package name
+\def\inline#1{% Inline code
+  \textcolor{spot}{\text{\texttt{#1}}}}
+\newcommand\acro[1]{% An acronym
+  \textsc{\MakeLowercase{#1}}}
+
+% Set up index.
+\DisableCrossrefs
+\IndexPrologue{%
+  \section*{\indexname}%
+  \addcontentsline{toc}{section}{\indexname}}
+\makeatletter\c@IndexColumns=2\makeatother
+\usepackage{makeidx}
+\makeindex
+
 \newcommand\mdef[1]{% A TeX macro definition
+  \index{#1@\cs{#1}|textit}%
   \phantomsection\label{macro:#1}\textcolor{spot}{\cs{#1}}}
 \newcommand\m[1]{% A TeX macro reference
+  \index{#1@\cs{#1}}%
   \hyperref[macro:#1]{\textcolor{spot}{\cs{#1}}}}
-\newcommand\envmdef[1]{% A TeX macro definition
-  \phantomsection\label{environment:#1}\t`#1`}
+
+\newcommand\envmdef[1]{% A LaTeX environment definition
+  \index{#1@\texttt{#1}|textit}%
+  \phantomsection\label{environment:#1}\inline{#1}}
 \newcommand\envm[1]{% A LaTeX environment reference
-  \hyperref[environment:#1]{\t`#1`}}
+  \index{#1@\texttt{#1}}%
+  \hyperref[environment:#1]{\inline{#1}}}
+
 \newcommand\luamdef[1]{% A Lua object / method definition
-  \phantomsection\label{lua:#1}\t`#1`}
+  \index{#1@\texttt{#1}|textit}%
+  \phantomsection\label{lua:#1}\inline{#1}}
 \newcommand\luam[1]{% A Lua object / method reference
-  \hyperref[lua:#1]{\t`#1`}}
-\def\inline#1{% Inline code
-  \textcolor{spot}{\text{\texttt{#1}}}}
-\def\t`#1`{\inline{#1}}
+  \index{#1@\texttt{#1}}%
+  \hyperref[lua:#1]{\inline{#1}}}
+
 \newcommand\Optitem[2][]{\penalty -1000\relax % An option item definition
+  \index{#2@\texttt{#2}|textit}%
   \phantomsection\label{opt:#2}\optitem[#1]{#2}}
 \newcommand\Valitem[2][]{\penalty -1000\relax % A value item definition
+  \index{#2@\texttt{#2}}%
   \phantomsection\label{opt:#2}\valitem[#1]{#2}}
 \newcommand\Opt[1]{% An option / value item reference
-  \hyperref[opt:#1]{\t`#1`}}
-\newcommand\acro[1]{% An acronym
-  \textsc{\MakeLowercase{#1}}}
+  \index{#1@\texttt{#1}}%
+  \hyperref[opt:#1]{\inline{#1}}}
 
 % Set up markdown.
 \usepackage[
@@ -366,7 +387,8 @@
 \printtitlepage
 \tableofcontents
 \DocInput{markdown.dtx}
-\printbibliography
+\printbibliography[heading=bibintoc]
+\printindex
 \end{document}
 %</driver>
 %<*manual-css>
diff --git a/markdown.ist b/markdown.ist
new file mode 100644
index 000000000..7e01ae03e
--- /dev/null
+++ b/markdown.ist
@@ -0,0 +1,3 @@
+delim_0 "\\hfill"
+delim_1 "\\hfill"
+delim_2 "\\hfill"