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  <xsl:param name="program" />


  <xsl:template match="/expr/list">
    <appendix xml:id="appendix-configuration-options">
      <title>Configuration Options</title>
      <variablelist xml:id="configuration-variable-list">
        <xsl:for-each select="attrs">
          <xsl:variable name="id" select="concat('opt-', str:replace(str:replace(str:replace(str:replace(attr[@name = 'name']/string/@value, '*', '_'), '&lt;', '_'), '>', '_'), '?', '_'))" />
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              <option>
                <xsl:value-of select="attr[@name = 'name']/string/@value" />
              </option>
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              <nixos:option-description>
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                  <xsl:value-of disable-output-escaping="yes"
                                select="attr[@name = 'description']/string/@value" />
                </para>
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                <para>
                  <emphasis>Type:</emphasis>
                  <xsl:text> </xsl:text>
                  <xsl:value-of select="attr[@name = 'type']/string/@value"/>
                  <xsl:if test="attr[@name = 'readOnly']/bool/@value = 'true'">
                    <xsl:text> </xsl:text>
                    <emphasis>(read only)</emphasis>
                  </xsl:if>
                </para>
              </xsl:if>

              <xsl:if test="attr[@name = 'default']">
                <para>
                  <emphasis>Default:</emphasis>
                  <xsl:text> </xsl:text>
                  <xsl:apply-templates select="attr[@name = 'default']" mode="top" />
                </para>
              </xsl:if>

              <xsl:if test="attr[@name = 'example']">
                <para>
                  <emphasis>Example:</emphasis>
                  <xsl:text> </xsl:text>
                  <xsl:choose>
                    <xsl:when test="attr[@name = 'example']/attrs[attr[@name = '_type' and string[@value = 'literalExample']]]">
                      <programlisting><xsl:value-of select="attr[@name = 'example']/attrs/attr[@name = 'text']/string/@value" /></programlisting>
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                    <xsl:otherwise>
                      <xsl:apply-templates select="attr[@name = 'example']" mode="top" />
                    </xsl:otherwise>
                  </xsl:choose>
                </para>
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              <xsl:if test="attr[@name = 'relatedPackages']">
                <para>
                  <emphasis>Related packages:</emphasis>
                  <xsl:text> </xsl:text>
                  <xsl:value-of disable-output-escaping="yes"
                                select="attr[@name = 'relatedPackages']/string/@value" />
                </para>
              </xsl:if>

              <xsl:if test="count(attr[@name = 'declarations']/list/*) != 0">
                <para>
                  <emphasis>Declared by:</emphasis>
                </para>
                <xsl:apply-templates select="attr[@name = 'declarations']" />
              </xsl:if>

              <xsl:if test="count(attr[@name = 'definitions']/list/*) != 0">
                <para>
                  <emphasis>Defined by:</emphasis>
                </para>
                <xsl:apply-templates select="attr[@name = 'definitions']" />
              </xsl:if>

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<programlisting>
<xsl:text>''
</xsl:text><xsl:value-of select='str:replace(string/@value, "${", "&apos;&apos;${")' /><xsl:text>''</xsl:text></programlisting>
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    <xsl:text>null</xsl:text>
  </xsl:template>


  <xsl:template match="string">
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        <xsl:text>''</xsl:text><xsl:value-of select='str:replace(@value, "${", "&apos;&apos;${")' /><xsl:text>''</xsl:text>
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        <xsl:text>"</xsl:text><xsl:value-of select="str:replace(str:replace(str:replace(str:replace(@value, '\', '\\'), '&quot;', '\&quot;'), '&#010;', '\n'), '$', '\$')" /><xsl:text>"</xsl:text>
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    </xsl:choose>
  </xsl:template>


  <xsl:template match="int">
    <xsl:value-of select="@value" />
  </xsl:template>


  <xsl:template match="bool[@value = 'true']">
    <xsl:text>true</xsl:text>
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  <xsl:template match="bool[@value = 'false']">
    <xsl:text>false</xsl:text>
  </xsl:template>


  <xsl:template match="list">
    [
    <xsl:for-each select="*">
      <xsl:apply-templates select="." />
      <xsl:text> </xsl:text>
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  <xsl:template match="attrs[attr[@name = '_type' and string[@value = 'literalExample']]]">
    <xsl:value-of select="attr[@name = 'text']/string/@value" />
  </xsl:template>


  <xsl:template match="attrs">
    {
    <xsl:for-each select="attr">
      <xsl:value-of select="@name" />
      <xsl:text> = </xsl:text>
      <xsl:apply-templates select="*" /><xsl:text>; </xsl:text>
    </xsl:for-each>
    }
  </xsl:template>


  <xsl:template match="derivation">
    <replaceable>(build of <xsl:value-of select="attr[@name = 'name']/string/@value" />)</replaceable>
  </xsl:template>

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    <simplelist>
      <xsl:for-each select="list/string">
        <member><filename>
          <!-- Hyperlink the filename either to the NixOS Subversion
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          <xsl:choose>
            <xsl:when test="not(starts-with(@value, '/'))">
              <xsl:choose>
                <xsl:when test="$revision = 'local'">
                  <xsl:attribute name="xlink:href">https://github.com/NixOS/nixpkgs/blob/master/<xsl:value-of select="@value"/></xsl:attribute>
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          <!-- Print the filename and make it user-friendly by replacing the
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              &lt;nixpkgs/<xsl:value-of select="@value"/>&gt;
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            <xsl:otherwise>
              <xsl:value-of select="@value" />
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        </filename></member>
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  <xsl:template match="function">
    <xsl:text>λ</xsl:text>
  </xsl:template>


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