asciidoc: add missing dependencies

The current asciidoc expression is impure; it relies on several tools to
be found in PATH at runtime. This commit adds a enableStandardFeatures
parameter that pulls in all dependencies and patches asciidoc to contain
full paths to the tools.

enableStandardFeatures defaults to true because asciidoc may attempt to
call all tools in its default configuration. With all standard features,
the closure size increases from 255 MiB to 1.5 GiB. Set
enableStandardFeatures = false if you want a minimal asciidoc.

pkgs/tools/typesetting/asciidoc/default.nix

@@ -1,4 +1,25 @@
 { fetchurl, stdenv, python
+
+, enableStandardFeatures ? true
+, sourceHighlight ? null
+, highlight ? null
+, pygments ? null
+, graphviz ? null
+, tetex ? null
+, dblatex ? null
+, libxslt ? null
+, w3m ? null
+, lynx ? null
+, imagemagick ? null
+, lilypond ? null
+, libxml2 ? null
+, docbook_xml_dtd_45 ? null
+, docbook5_xsl ? null
+, docbook_xsl ? null
+, fop ? null
+# TODO: Package this:
+#, epubcheck ? null
+
 , unzip ? null
 # filters
 , enableDitaaFilter ? false, jre ? null
@@ -12,6 +33,26 @@
 , enableOdfBackend ? false
 }:
 
+assert enableStandardFeatures ->
+  sourceHighlight != null &&
+  highlight != null &&
+  pygments != null &&
+  graphviz != null &&
+  tetex != null &&
+  dblatex != null &&
+  libxslt != null &&
+  w3m != null &&
+  lynx != null &&
+  imagemagick != null &&
+  lilypond != null &&
+  libxml2 != null &&
+  docbook_xml_dtd_45 != null &&
+  docbook5_xsl != null &&
+  docbook_xsl != null &&
+  fop != null;
+# TODO: Package this:
+#  epubcheck != null;
+
 # filters
 assert (enableDitaaFilter || enableMscgenFilter || enableDiagFilter || enableQrcodeFilter || enableAafigureFilter) -> unzip != null;
 assert enableDitaaFilter -> jre != null;
@@ -49,7 +90,7 @@ let
     sha256 = "0h4bql1nb4y4fmg2yvlpfjhvy22ln8jsaxdr10f8bfcg5lr0zkxs";
   };
 
-  # latest commit in master branch as per 2013-09-22
+  # there are no archives or tags, using latest commit in master branch as per 2013-09-22
   matplotlibFilterSrc = let commit = "75f0d009629f93f33fab04b83faca20cc35dd358"; in fetchurl rec {
     name = "mplw-${commit}.tar.gz";
     url = "https://api.github.com/repos/lvv/mplw/tarball/${commit}";
@@ -151,11 +192,48 @@ stdenv.mkDerivation rec {
     # the odp backend already has that fix. Copy it here until fixed upstream.
     sed -i "s|'/etc/asciidoc/backends/odt/asciidoc.ott'|os.path.dirname(__file__),'asciidoc.ott'|" \
         "$out/etc/asciidoc/backends/odt/a2x-backend.py"
+  '' + optionalString enableStandardFeatures ''
+    sed -e "s|dot|${graphviz}/bin/dot|g" \
+        -e "s|neato|${graphviz}/bin/neato|g" \
+        -e "s|twopi|${graphviz}/bin/circo|g" \
+        -e "s|circo|${graphviz}/bin/circo|g" \
+        -e "s|fdp|${graphviz}/bin/fdp|g" \
+        -i "filters/graphviz/graphviz2png.py"
+
+    sed -e "s|run('latex|run('${tetex}/bin/latex|g" \
+        -e "s|cmd = 'dvipng'|cmd = '${tetex}/bin/dvipng'|g" \
+        -i "filters/latex/latex2png.py"
+
+    sed -e "s|run('abc2ly|run('${lilypond}/bin/abc2ly|g" \
+        -e "s|run('lilypond|run('${lilypond}/bin/lilypond|g" \
+        -e "s|run('convert|run('${imagemagick}/bin/convert|g" \
+        -i "filters/music/music2png.py"
+
+    sed -e 's|filter="source-highlight|filter="${sourceHighlight}/bin/source-highlight|' \
+        -e 's|filter="highlight|filter="${highlight}/bin/highlight|' \
+        -e 's|filter="pygmentize|filter="${pygments}/bin/pygmentize|' \
+        -i "filters/source/source-highlight-filter.conf"
+
+    # ENV is custom environment passed to programs that a2x invokes. Here we
+    # use it to work around an impurity in the tetex package; tetex tools
+    # cannot find their neighbours (e.g. pdflatex doesn't find mktextfm).
+    # We can remove PATH= when those impurities are fixed.
+    sed -e "s|^ENV =.*|ENV = dict(XML_CATALOG_FILES='${docbook_xml_dtd_45}/xml/dtd/docbook/catalog.xml ${docbook5_xsl}/xml/xsl/docbook/catalog.xml ${docbook_xsl}/xml/xsl/docbook/catalog.xml', PATH='${tetex}/bin')|" \
+        -e "s|^ASCIIDOC =.*|ASCIIDOC = '$out/bin/asciidoc'|" \
+        -e "s|^XSLTPROC =.*|XSLTPROC = '${libxslt}/bin/xsltproc'|" \
+        -e "s|^DBLATEX =.*|DBLATEX = '${dblatex}/bin/dblatex'|" \
+        -e "s|^FOP =.*|FOP = '${fop}/bin/fop'|" \
+        -e "s|^W3M =.*|W3M = '${w3m}/bin/w3m'|" \
+        -e "s|^LYNX =.*|LYNX = '${lynx}/bin/lynx'|" \
+        -e "s|^XMLLINT =.*|XMLLINT = '${libxml2}/bin/xmllint'|" \
+        -e "s|^EPUBCHECK =.*|EPUBCHECK = 'nixpkgs_is_missing_epubcheck'|" \
+        -i a2x.py
   '' + ''
     for n in $(find "$out" . -name \*.py); do
       sed -i -e "s,^#![[:space:]]*.*/bin/env python,#!${python}/bin/python,g" "$n"
       chmod +x "$n"
     done
+
     sed -i -e "s,/etc/vim,,g" Makefile.in
   '';
 

pkgs/top-level/all-packages.nix

@@ -567,7 +567,8 @@ let
   mcelog = callPackage ../os-specific/linux/mcelog { };
 
   asciidoc = callPackage ../tools/typesetting/asciidoc {
-    inherit (pythonPackages) matplotlib numpy aafigure recursivePthLoader;
+    inherit (pythonPackages) matplotlib numpy aafigure recursivePthLoader
+                             pygments;
   };
 
   autossh = callPackage ../tools/networking/autossh { };