* Generate DocBook documentation on the available options from the Nix

expression.

svn path=/nixos/trunk/; revision=7764

doc/manual/Makefile

@@ -0,0 +1,20 @@
+XMLLINT = xmllint --catalogs
+XSLTPROC = xsltproc --catalogs \
+ --param section.autolabel 1 \
+ --param section.label.includes.component.label 1 \
+ --param html.stylesheet \'style.css\' \
+ --param xref.with.number.and.title 1 \
+ --param toc.section.depth 3 \
+ --param admon.style \'\' \
+ --param callout.graphics.extension \'.gif\'
+
+options.html: options-db.xml
+	$(XSLTPROC) --nonet --xinclude --output $@ \
+	  $(docbookxsl)/html/docbook.xsl options-db.xml
+
+options-db.xml: options.xml options-to-docbook.xsl
+	xsltproc -o options-db.xml options-to-docbook.xsl options.xml 
+
+options.xml: ../../system/options.nix
+	echo 'import ../../system/options.nix {pkgs = import ../../pkgs/top-level/all-packages.nix {};}' | \
+	    nix-instantiate --eval-only --xml --strict - > options.xml || (rm options.xml && false)

doc/manual/options-to-docbook.xsl

@@ -0,0 +1,45 @@
+<?xml version="1.0"?>
+
+<xsl:stylesheet version="1.0"
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                xmlns:str="http://exslt.org/strings"
+                xmlns="http://docbook.org/ns/docbook"
+                extension-element-prefixes="str"
+                >
+
+  <xsl:output method='xml' encoding="UTF-8" />
+
+  <xsl:template match="/expr/list">
+
+    <chapter>
+      <title>List of Options</title>
+
+      <variablelist>
+
+        <xsl:for-each select="attrs">
+
+          <varlistentry>
+             <term>
+               <option>
+                 <xsl:for-each select="attr[@name = 'name']/list/string">
+                   <xsl:value-of select="@value" />
+                   <xsl:if test="position() != last()">.</xsl:if> 
+                 </xsl:for-each>
+               </option>
+             </term>
+
+             <listitem><para>
+               <xsl:value-of select="attr[@name = 'description']/string/@value" />
+             </para></listitem>
+
+          </varlistentry>
+
+        </xsl:for-each>
+
+      </variablelist>
+
+    </chapter>
+
+  </xsl:template>
+  
+</xsl:stylesheet>