Implemented new "layered" site generation architecture

* "source" directory contains layers as subdirectories
** ordered by their name
** e.g. layer 0 is "00_content" and contains the content alongside some metadata
* transformations contained within the "source" layers are processed sequentally
* transformations define their requirements in a "meta" variable
** the "meta" variable is interpreted by the core transformation "generate.xsl"
* requirements are currently datasources and target information
** every transformation may have one datasource of type "main"
*** this data source offers e.g. the option to iterate over it
** every transformation may have a arbitrary number of "support" datasources
*** e.g. "meta" is a support datasource
** the target node may provide a fixed target path or a Xpath to be evaluated
* the result of each transformation is written to the appropriate layer of the "result" directory
* this approach to XSLT based static site generation should be quite flexible and offer good expandability
** e.g. adding new datasource options and types

6 files changed, 135 insertions, 0 deletions

diff --git a/source/00_content/meta.xml b/source/00_content/meta.xml
new file mode 100644
index 0000000..8c1af22
--- /dev/null
+++ b/source/00_content/meta.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<meta>
+	<title>/home/adrian</title>
+	<url>/home/common/projects/dev/static_site_generator/target/03_result</url>
+</meta>
diff --git a/source/pages/about.md b/source/00_content/pages/about.md
index 827b612..827b612 100644
--- a/source/pages/about.md
+++ b/source/00_content/pages/about.md
diff --git a/source/pages/contact.md b/source/00_content/pages/contact.md
index a9d8be1..a9d8be1 100644
--- a/source/pages/contact.md
+++ b/source/00_content/pages/contact.md
diff --git a/source/01_files/source.xsl b/source/01_files/source.xsl
new file mode 100644
index 0000000..d13e3bd
--- /dev/null
+++ b/source/01_files/source.xsl
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet
+	version="1.0"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:xalan="http://xml.apache.org/xalan"
+	xmlns:InputXSLT="function.inputxslt.application"
+	exclude-result-prefixes="xalan InputXSLT"
+>
+
+<xsl:output
+	method="xml"
+	omit-xml-declaration="no"
+	encoding="UTF-8"
+	indent="yes"
+/>
+
+<xsl:variable name="meta">
+	<datasource type="main"/>
+	<target     mode="plain" value="source.xml"/> 
+</xsl:variable>
+
+<xsl:template name="list_source">
+	<xsl:param name="base"/>
+
+	<xsl:for-each select="InputXSLT:read-directory($base)/entry">
+		<xsl:choose>
+			<xsl:when test="@type = 'directory'">
+				<xsl:element name="{./name}">
+					<xsl:call-template name="list_source">
+						<xsl:with-param name="base" select="./full"/>
+					</xsl:call-template>
+				</xsl:element>
+			</xsl:when>
+			<xsl:otherwise>
+				<file>
+					<xsl:copy-of select="./*"/>
+				</file>
+			</xsl:otherwise>
+		</xsl:choose>
+	</xsl:for-each>
+</xsl:template>
+
+<xsl:template match="/">
+	<datasource>
+		<xsl:call-template name="list_source">
+			<xsl:with-param name="base">[source/00_content]</xsl:with-param>
+		</xsl:call-template>
+	</datasource>
+</xsl:template>
+
+</xsl:stylesheet>
diff --git a/source/02_data/pages.xsl b/source/02_data/pages.xsl
new file mode 100644
index 0000000..4f3002f
--- /dev/null
+++ b/source/02_data/pages.xsl
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet
+	version="1.0"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:xalan="http://xml.apache.org/xalan"
+	xmlns:InputXSLT="function.inputxslt.application"
+	exclude-result-prefixes="xalan InputXSLT"
+>
+
+<xsl:output
+	method="xml"
+	omit-xml-declaration="no"
+	encoding="UTF-8"
+	indent="yes"
+/>
+
+<xsl:include href="[utility/datasource.xsl]"/>
+<xsl:include href="[utility/formatter.xsl]"/>
+
+<xsl:variable name="meta">
+	<datasource type="main"  mode="full" source="target/01_files/source.xml" target="files"/>
+	<target     mode="plain" value="pages.xml"/> 
+</xsl:variable>
+
+<xsl:template match="files/pages/file[./extension = '.md']">
+	<entry handle="{./name}">
+		<xsl:choose>
+			<xsl:when test="./extension = '.md'">
+				<xsl:call-template name="formatter">
+					<xsl:with-param name="format">/usr/bin/markdown</xsl:with-param>
+					<xsl:with-param name="source" select="InputXSLT:read-file(./full)/text()"/>
+				</xsl:call-template>
+			</xsl:when>
+			<xsl:when test="./extension = '.xml'">
+				<xsl:copy-of select="InputXSLT:read-file(./full)/*"/>
+			</xsl:when>
+			<xsl:otherwise>
+				<xsl:copy-of select="InputXSLT:read-file(./full)/text()"/>
+			</xsl:otherwise>
+		</xsl:choose>
+	</entry>
+</xsl:template>
+
+</xsl:stylesheet>
diff --git a/source/03_result/page.xsl b/source/03_result/page.xsl
new file mode 100644
index 0000000..f6113f3
--- /dev/null
+++ b/source/03_result/page.xsl
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet
+	version="1.0"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:xalan="http://xml.apache.org/xalan"
+	xmlns:InputXSLT="function.inputxslt.application"
+	exclude-result-prefixes="xalan InputXSLT"
+>
+
+<xsl:output
+	method="xml"
+	omit-xml-declaration="no"
+	encoding="UTF-8"
+	indent="yes"
+/>
+
+<xsl:include href="[utility/master.xsl]"/>
+
+<xsl:variable name="meta">
+	<datasource type="main"    mode="iterate" source="target/02_data/pages.xml"   target="page"/>
+	<datasource type="support" mode="full"    source="source/00_content/meta.xml" target="meta"/>
+	<target     mode="xpath"   value="concat('pages/', xalan:nodeset($input)/datasource/page/entry/@handle)"/> 
+</xsl:variable>
+
+<xsl:template name="title-text">
+	<xsl:value-of select="/datasource/page/entry/h1"/>
+</xsl:template>
+
+<xsl:template match="page/entry">
+	<div class="last article">
+		<xsl:copy-of select="./*"/>
+	</div>
+</xsl:template>
+
+</xsl:stylesheet>