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atom2rss.xsl
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<?xml version="1.0" encoding="UTF-8" ?>
<!-- This file was taken from http://atom.geekhood.net and was modified a bit to handle Github feeds properly (search for "Github" in this file and see "utils/al-gnus.el" for the verbose explanation. -->
<!-- Released under CC lincense http://creativecommons.org/licenses/by/2.5/ -->
<!-- Feeds generated using this stylesheet (or it's derivatives) must put http://atom.geekhood.net in <generator> element -->
<x:stylesheet version="1.0"
exclude-result-prefixes="atom xhtml php"
xmlns:php="http://php.net/xsl"
xmlns:x="http://www.w3.org/1999/XSL/Transform"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:xhtml="http://www.w3.org/1999/xhtml">
<x:output encoding="utf-8" indent="yes" method="xml" media-type="application/rss+xml" />
<x:template match="/atom:feed">
<rss version="2.0">
<channel>
<x:if test="//@xml:lang">
<language><x:value-of select="//@xml:lang[1]" /></language>
</x:if>
<description>
<x:choose>
<x:when test="atom:subtitle"><x:apply-templates select="atom:subtitle" mode="asHTML"/></x:when>
<x:otherwise>
<!-- this sucks -->
<x:apply-templates select="atom:title" mode="asHTML"/> (converted from Atom 1.0)
</x:otherwise>
</x:choose>
</description>
<x:choose>
<x:when test="atom:logo"><image><x:apply-templates select="atom:logo" mode="image"/></image></x:when>
<x:when test="atom:icon"><image><x:apply-templates select="atom:icon" mode="image"/></image></x:when>
</x:choose>
<x:apply-templates />
<generator><x:if test="atom:generator"><x:apply-templates select="atom:generator" mode="gen"/> + </x:if>Atom 1.0 XSLT+PHP Transform v1.1 (http://atom.geekhood.net)</generator>
</channel>
</rss>
</x:template>
<!-- simple losless conversions -->
<x:template match="atom:contributor">
<dc:contributor><x:call-template name="person" /></dc:contributor>
</x:template>
<x:template match="atom:title">
<title><x:call-template name="asHTML" /></title>
</x:template>
<x:template match="atom:generator"/>
<x:template match="atom:generator" mode="gen">
<x:apply-templates mode="asText"/> <x:if test="@version"> v<x:value-of select="@version"/></x:if> <x:if test="@uri"> (<x:value-of select="@uri"/>)</x:if>
</x:template>
<x:template match="atom:published|atom:updated">
<x:if test="local-name() = 'published' or not(../atom:published)">
<pubDate>
<x:choose>
<x:when test="function-available('php:function')">
<x:variable name="time" select="php:function('strtotime', string(.))"/>
<x:value-of select="php:function('gmstrftime', '%a, %d %b %Y %T %Z', $time)"/>
</x:when>
<x:otherwise>
<x:apply-templates/>
</x:otherwise>
</x:choose>
</pubDate>
</x:if>
</x:template>
<x:template match="atom:rights"><copyright><x:apply-templates /></copyright></x:template>
<x:template match="atom:link[not(@rel) or @rel='alternate']">
<x:if test="generate-id(.) = generate-id(../atom:link[not(@rel) or @rel='alternate'][1])">
<link><x:value-of select="@href"/></link>
</x:if>
</x:template>
<x:template match="atom:link[@rel='enclosure']">
<x:if test="generate-id(.) = generate-id(../atom:link[@rel='enclosure'][1])">
<enclosure url="{@href}" type="{@type}" length="{@length}"/>
</x:if>
</x:template>
<x:template match="atom:entry/atom:id">
<guid>
<x:if test="not(. = ../atom:link[@rel='alternate']/@href) and not(. = ../atom:link[@rel='permalink']/@href) and not(. = ../atom:link[not(@rel)]/@href)">
<x:attribute name="isPermaLink">false</x:attribute>
</x:if>
<x:apply-templates />
</guid>
</x:template>
<!-- dodgy conversions -->
<x:template match="atom:icon|atom:logo"/><!-- merged into rss:image -->
<x:template match="atom:icon|atom:logo" mode="image">
<url><x:value-of select="."/></url>
<x:if test="../atom:title"><title><x:apply-templates select="../atom:title" mode="asText" /></title></x:if>
<x:if test="../atom:link[not(@rel) or @rel='alternate']"><link><x:value-of select="../atom:link[not(@rel) or @rel='alternate'][1]/@href"/></link></x:if>
</x:template>
<x:template name="person">
<x:choose>
<x:when test="atom:email"><x:value-of select="atom:email"/></x:when>
<x:when test="/atom:feed/atom:author[./atom:email][1]/atom:email"><x:value-of select="/atom:feed/atom:author[./atom:email][1]/atom:email"/></x:when>
</x:choose>
(<x:value-of select="atom:name"/><x:if test="@uri"> <x:value-of select="uri"/></x:if>)
</x:template>
<x:template match="atom:author[not(starts-with(./atom:email,'webmaster@'))][1]">
<x:if test="atom:email">
<managingEditor>
<x:call-template name="person" />
</managingEditor>
</x:if>
</x:template>
<x:template match="atom:author[starts-with(./atom:email,'webmaster@')][1]">
<webMaster>
<x:call-template name="person" />
</webMaster>
</x:template>
<x:template match="atom:subtitle"/>
<x:template match="atom:source">
<source url="{atom:link[@rel='self']}"><x:apply-templates select="atom:title" mode="asText"/></source>
</x:template>
<!-- lossy conversion -->
<x:template match="atom:feed/atom:id"/>
<!-- Commented because self link to private feed on Github may contain double dash which is not allowed in comments -->
<!-- <x:template match="atom:feed/atom:link[@rel='self']"><x:comment> source: <x:value-of select="@href"/><x:text> </x:text></x:comment> </x:template> -->
<x:template match="atom:category"><!-- label gets lost -->
<category>
<x:if test="@scheme">
<x:attribute name="domain"><x:value-of select="@scheme"/></x:attribute>
</x:if>
<x:value-of select="@term"/>
<x:if test="@label and not(@label = @term)"><x:comment><x:value-of select="@label"/></x:comment></x:if>
</category>
</x:template>
<!-- entry -->
<x:template match="atom:summary|atom:content"/>
<x:template match="atom:entry">
<item>
<x:choose>
<x:when test="atom:summary"><description><x:apply-templates select="atom:summary" mode="asHTML"/> <x:if test="atom:content"> (...)</x:if></description></x:when>
<x:when test="atom:content"><description><x:apply-templates select="atom:content" mode="asHTML"/></description></x:when>
</x:choose>
<x:apply-templates/>
<x:if test="not(atom:source) and /atom:feed/atom:link[@rel='self']">
<source url="{/atom:feed/atom:link[@rel='self']/@href}">
<x:choose>
<x:when test="/atom:feed/atom:link[@rel='self' and @title]"><x:value-of select="/atom:feed/atom:link[@rel='self']/@title"/></x:when>
<x:otherwise><x:apply-templates select="/atom:feed/atom:title" mode="asText"/></x:otherwise>
</x:choose>
</source>
</x:if>
<x:apply-templates select="atom:source/atom:category"/>
<x:if test="not(atom:copyright)"><x:apply-templates select="atom:source/atom:copyright"/></x:if>
<x:if test="not(atom:author)"><x:apply-templates select="atom:source/atom:author"/></x:if>
<x:if test="not(atom:contributor)"><x:apply-templates select="atom:source/atom:contributor"/></x:if>
<x:if test="not(atom:updated)"><x:apply-templates select="atom:source/atom:updated"/></x:if>
</item>
</x:template>
<!-- santas little helpers -->
<x:template match="*" mode="asHTML"><x:call-template name="asHTML"/></x:template>
<x:template name="asHTML">
<x:choose>
<x:when test="@type='xhtml'">
<x:apply-templates select="xhtml:div" mode="xhtml2html" />
</x:when>
<x:when test="@type='html'"><x:value-of select="." /></x:when>
<x:otherwise>
<x:value-of select="."/>
</x:otherwise>
</x:choose>
</x:template>
<x:template match="*[@type='html' or @type='text/html']" mode="asText">
<x:call-template name="removeHtml"><x:with-param name="text" select="."/></x:call-template>
</x:template>
<x:template match="*" mode="asText">
<x:value-of select="."/>
</x:template>
<!-- html 2 text (primitive method) -->
<x:template name="removeHtml">
<x:param name="text"/>
<x:choose>
<x:when test="contains($text, '<') and contains(substring-after($text, '<'),'>')">
<x:value-of select="substring-before($text, '<')"/>
<x:call-template name="removeHtml">
<x:with-param name="text" select="substring-after(substring-after($text,'<'),'>')"/>
</x:call-template>
</x:when>
<x:otherwise>
<x:value-of select="$text"/>
</x:otherwise>
</x:choose>
</x:template>
<!-- xhtml 2 html -->
<x:template match="xhtml:img|xhtml:br|xhtml:hr|xhtml:input|xhtml:col|xhtml:area|xhtml:input|xhtml:link|xhtml:meta|xhtml:param" mode="xhtml2html">
<<x:value-of select="local-name(.)"/><x:apply-templates select="@*" mode="xhtml2html"/>><x:apply-templates mode="xhtml2html"/>
</x:template>
<x:template match='xhtml:*' mode="xhtml2html">
<<x:value-of select="local-name(.)"/><x:apply-templates select="@*" mode="xhtml2html"/>><x:apply-templates mode="xhtml2html"/></<x:value-of select="local-name(.)"/>>
</x:template>
<x:template match='@*' mode="xhtml2html">
<x:text> </x:text><x:value-of select="local-name(.)"/>="<x:value-of select="."/>"</x:template>
<x:template match="comment()" mode="xhtml2html">
<x:text disable-output-escaping="yes"><![CDATA[</x:text>
<x:comment><x:value-of select="."/></x:comment>
<x:text disable-output-escaping="yes">]]></x:text>
</x:template>
<x:template match="text()" mode="xhtml2html">
<x:choose>
<x:when test="contains(.,'&') or contains(.,'<')">
<x:text disable-output-escaping="yes"><![CDATA[</x:text>
<x:value-of select="." />
<x:text disable-output-escaping="yes">]]></x:text>
</x:when>
<x:otherwise>
<x:value-of select="."/>
</x:otherwise>
</x:choose>
</x:template>
<!-- copy extensions -->
<x:template match='*'>
<x:comment>Unknown element <x:value-of select="local-name(.)"/></x:comment>
<x:copy>
<x:copy-of select='node()|@*'/>
</x:copy>
</x:template>
</x:stylesheet>