Removed need for prefixing datasource source attribute

* transformations contain one or more "datasource" meta nodes
** these nodes define the required datasources
** up until now it was required to define the whole path to the file to be loaded
* the implementation of directory linkage in b942f8e removed the underlying need for providing the source / target prefix
** this commit now updates the generation transformations to match this change
*** this simplifies the datasource definition process for the end-user
*** additionally it makes the target / source directories easier to maintain
* changed cleanage task implementation to remove the whole directory and recreate it from scratch
** otherwise directory linkage and in turn the whole generation failed when the target directory did not exist in the first place
* removed task reordering in the process transformation
** tasks are now processed exactly as they were scheduled
** this was changed so that e.g. the "00_content" directory is linked before the first datasource is required

17 files changed, 63 insertions, 54 deletions

diff --git a/plan.xsl b/plan.xsl
index 2401019..57b808c 100644
--- a/plan.xsl
+++ b/plan.xsl
@@ -50,6 +50,11 @@
 		<xsl:choose>
 			<xsl:when test="@extension = '.xsl'">
 				<task type="generate">
+					<meta>
+						<datasource_prefix>
+							<xsl:value-of select="$target"/>
+						</datasource_prefix>
+					</meta>
 					<source>
 						<xsl:value-of select="concat($source, '/', $path, '/', @name, @extension)"/>
 					</source>
diff --git a/process.xsl b/process.xsl
index 29efc0e..595d617 100644
--- a/process.xsl
+++ b/process.xsl
@@ -30,7 +30,7 @@
 	<xsl:param name="path"/>
 
 	<xsl:value-of select="InputXSLT:external-command(
-		concat('rm -r ./', $path, '/*')
+		concat('rm -r ./', $path, '; mkdir ./', $path)
 	)/self::command/@result"/>
 </xsl:template>
 
@@ -87,13 +87,16 @@
 </xsl:template>
 
 <xsl:template name="resolve_datasource">
+	<xsl:param name="prefix"/>
 	<xsl:param name="datasource"/>
 
 	<xsl:for-each select="$datasource">
 		<xsl:element name="{@target}">
 			<xsl:choose>
 				<xsl:when test="@mode = 'full'">
-					<xsl:copy-of select="InputXSLT:read-file(@source)/self::file/*/*"/>
+					<xsl:copy-of select="InputXSLT:read-file(
+						concat($prefix, '/', @source)
+					)/self::file/*/*"/>
 				</xsl:when>
 			</xsl:choose>
 		</xsl:element>
@@ -104,6 +107,7 @@
 	<xsl:param name="main"/>
 	<xsl:param name="support"/>
 	<xsl:param name="transformation"/>
+	<xsl:param name="datasource_prefix"/>
 	<xsl:param name="target_prefix"/>
 	<xsl:param name="target"/>
 
@@ -112,6 +116,7 @@
 			<xsl:with-param name="main" select="$main"/>
 			<xsl:with-param name="support">
 				<xsl:call-template name="resolve_datasource">
+					<xsl:with-param name="prefix"     select="$datasource_prefix"/>
 					<xsl:with-param name="datasource" select="$support"/>
 				</xsl:call-template>
 			</xsl:with-param>
@@ -134,10 +139,9 @@
 </xsl:template>
 
 <xsl:template name="process">
-	<xsl:param name="source"/>
-	<xsl:param name="target"/>
+	<xsl:param name="task"/>
 
-	<xsl:variable name="transformation" select="InputXSLT:read-file($source)/self::file/node()"/>
+	<xsl:variable name="transformation" select="InputXSLT:read-file($task/source)/self::file/node()"/>
 	<xsl:variable name="meta"           select="$transformation/self::*[name() = 'xsl:stylesheet']/*[name() = 'xsl:variable' and @name = 'meta']"/>
 	<xsl:variable name="main_source"    select="$meta/datasource[@type = 'main']"/>
 	<xsl:variable name="support_source" select="$meta/datasource[@type = 'support']"/>
@@ -147,36 +151,43 @@
 			<xsl:call-template name="compile">
 				<xsl:with-param name="main">
 					<xsl:element name="{$main_source/@target}">
-						<xsl:copy-of select="InputXSLT:read-file($main_source/@source)/self::file/*/*"/>
+						<xsl:copy-of select="InputXSLT:read-file(
+							concat($task/meta/datasource_prefix, '/', $main_source/@source)
+						)/self::file/*/*"/>
 					</xsl:element>
 				</xsl:with-param>
-				<xsl:with-param name="support"        select="$support_source"/>
-				<xsl:with-param name="transformation" select="$transformation"/>
-				<xsl:with-param name="target_prefix"  select="$target"/>
-				<xsl:with-param name="target"         select="$meta/target"/>
+				<xsl:with-param name="support"           select="$support_source"/>
+				<xsl:with-param name="transformation"    select="$transformation"/>
+				<xsl:with-param name="datasource_prefix" select="$task/meta/datasource_prefix"/>
+				<xsl:with-param name="target_prefix"     select="$task/target"/>
+				<xsl:with-param name="target"            select="$meta/target"/>
 			</xsl:call-template>
 		</xsl:when>
 		<xsl:when test="$main_source/@mode = 'iterate'">
-			<xsl:for-each select="InputXSLT:read-file($main_source/@source)/self::file/*/entry">
+			<xsl:for-each select="InputXSLT:read-file(
+				concat($task/meta/datasource_prefix, '/', $main_source/@source)
+			)/self::file/*/entry">
 				<xsl:call-template name="compile">
 					<xsl:with-param name="main">
 						<xsl:element name="{$main_source/@target}">
 							<xsl:copy-of select="."/>
 						</xsl:element>
 					</xsl:with-param>
-					<xsl:with-param name="support"        select="$support_source"/>
-					<xsl:with-param name="transformation" select="$transformation"/>
-					<xsl:with-param name="target_prefix"  select="$target"/>
-					<xsl:with-param name="target"         select="$meta/target"/>
+					<xsl:with-param name="support"           select="$support_source"/>
+					<xsl:with-param name="transformation"    select="$transformation"/>
+					<xsl:with-param name="datasource_prefix" select="$task/meta/datasource_prefix"/>
+					<xsl:with-param name="target_prefix"     select="$task/target"/>
+					<xsl:with-param name="target"            select="$meta/target"/>
 				</xsl:call-template>
 			</xsl:for-each>
 		</xsl:when>
 		<xsl:otherwise>
 			<xsl:call-template name="compile">
-				<xsl:with-param name="support"        select="$support_source"/>
-				<xsl:with-param name="transformation" select="$transformation"/>
-				<xsl:with-param name="target_prefix"  select="$target"/>
-				<xsl:with-param name="target"         select="$meta/target"/>
+				<xsl:with-param name="support"           select="$support_source"/>
+				<xsl:with-param name="transformation"    select="$transformation"/>
+				<xsl:with-param name="datasource_prefix" select="$task/meta/datasource_prefix"/>
+				<xsl:with-param name="target_prefix"     select="$task/target"/>
+				<xsl:with-param name="target"            select="$meta/target"/>
 			</xsl:call-template>
 		</xsl:otherwise>
 	</xsl:choose>
@@ -196,8 +207,7 @@
 <xsl:template match="task[@type = 'generate']">
 	<xsl:variable name="results">
 		<xsl:call-template name="process">
-			<xsl:with-param name="source" select="source"/>
-			<xsl:with-param name="target" select="target"/>
+			<xsl:with-param name="task" select="."/>
 		</xsl:call-template>
 	</xsl:variable>
 
@@ -232,10 +242,4 @@
 	</xsl:copy>
 </xsl:template>
 
-<xsl:template match="datasource">
-	<xsl:apply-templates select="task[@type = 'clean']"/>
-	<xsl:apply-templates select="task[@type = 'generate']"/>
-	<xsl:apply-templates select="task[@type = 'link']"/>
-</xsl:template>
-
 </xsl:stylesheet>
diff --git a/source/02_data/articles.xsl b/source/02_data/articles.xsl
index 7b951df..3a71cc2 100644
--- a/source/02_data/articles.xsl
+++ b/source/02_data/articles.xsl
@@ -11,7 +11,7 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"  mode="full" source="target/01_files/source.xml" target="files"/>
+	<datasource type="main"  mode="full" source="01_files/source.xml" target="files"/>
 	<target     mode="plain" value="articles.xml"/> 
 </xsl:variable>
 
diff --git a/source/02_data/pages.xsl b/source/02_data/pages.xsl
index 30a14f8..2123dae 100644
--- a/source/02_data/pages.xsl
+++ b/source/02_data/pages.xsl
@@ -11,7 +11,7 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"  mode="full" source="target/01_files/source.xml" target="files"/>
+	<datasource type="main"  mode="full" source="01_files/source.xml" target="files"/>
 	<target     mode="plain" value="pages.xml"/> 
 </xsl:variable>
 
diff --git a/source/02_data/tags.xsl b/source/02_data/tags.xsl
index 35c360e..b615213 100644
--- a/source/02_data/tags.xsl
+++ b/source/02_data/tags.xsl
@@ -7,7 +7,7 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"  mode="full" source="target/01_files/source.xml"  target="files"/>
+	<datasource type="main"  mode="full" source="01_files/source.xml"  target="files"/>
 	<target     mode="plain" value="tags.xml"/> 
 </xsl:variable>
 
diff --git a/source/03_meta/articles.xsl b/source/03_meta/articles.xsl
index e9a54c3..8babed3 100644
--- a/source/03_meta/articles.xsl
+++ b/source/03_meta/articles.xsl
@@ -7,7 +7,7 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"  mode="full" source="target/02_data/articles.xml" target="articles"/>
+	<datasource type="main"  mode="full" source="02_data/articles.xml" target="articles"/>
 	<target     mode="plain" value="articles.xml"/> 
 </xsl:variable>
 
diff --git a/source/03_meta/categories.xsl b/source/03_meta/categories.xsl
index a2945b3..f1c2f5e 100644
--- a/source/03_meta/categories.xsl
+++ b/source/03_meta/categories.xsl
@@ -10,8 +10,8 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="full" source="target/01_files/source.xml" target="files"/>
-	<datasource type="support" mode="full" source="target/02_data/pages.xml"   target="pages"/>
+	<datasource type="main"    mode="full" source="01_files/source.xml" target="files"/>
+	<datasource type="support" mode="full" source="02_data/pages.xml"   target="pages"/>
 	<target     mode="plain"   value="categories.xml"/> 
 </xsl:variable>
 
diff --git a/source/03_meta/meta.xsl b/source/03_meta/meta.xsl
index 91c09b3..2af78de 100644
--- a/source/03_meta/meta.xsl
+++ b/source/03_meta/meta.xsl
@@ -7,8 +7,8 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="full" source="source/00_content/meta.xml" target="meta"/>
-	<datasource type="support" mode="full" source="target/02_data/tags.xml"    target="tags"/>
+	<datasource type="main"    mode="full" source="00_content/meta.xml" target="meta"/>
+	<datasource type="support" mode="full" source="02_data/tags.xml"    target="tags"/>
 	<target     mode="plain"   value="meta.xml"/> 
 </xsl:variable>
 
diff --git a/source/03_meta/paginated_articles.xsl b/source/03_meta/paginated_articles.xsl
index 61439b8..e00ee51 100644
--- a/source/03_meta/paginated_articles.xsl
+++ b/source/03_meta/paginated_articles.xsl
@@ -7,7 +7,7 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"  mode="full" source="target/02_data/articles.xml" target="articles"/>
+	<datasource type="main"  mode="full" source="02_data/articles.xml" target="articles"/>
 	<target     mode="plain" value="paginated_articles.xml"/> 
 </xsl:variable>
 
diff --git a/source/03_meta/tags.xsl b/source/03_meta/tags.xsl
index 7caf37f..9e399cd 100644
--- a/source/03_meta/tags.xsl
+++ b/source/03_meta/tags.xsl
@@ -7,8 +7,8 @@
 <xsl:include href="[utility/datasource.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="full" source="target/02_data/tags.xml"     target="tags"/>
-	<datasource type="support" mode="full" source="target/02_data/articles.xml" target="articles"/>
+	<datasource type="main"    mode="full" source="02_data/tags.xml"     target="tags"/>
+	<datasource type="support" mode="full" source="02_data/articles.xml" target="articles"/>
 	<target     mode="plain"   value="tags.xml"/> 
 </xsl:variable>
 
diff --git a/source/99_result/archive.xsl b/source/99_result/archive.xsl
index 4d459c4..a6e8bce 100644
--- a/source/99_result/archive.xsl
+++ b/source/99_result/archive.xsl
@@ -7,9 +7,9 @@
 <xsl:include href="[utility/master.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="full" source="target/03_meta/articles.xml"     target="articles"/>
-	<datasource type="support" mode="full" source="target/03_meta/meta.xml"         target="meta"/>
-	<datasource type="support" mode="full" source="source/00_content/microblog.xml" target="microblog"/>
+	<datasource type="main"    mode="full" source="03_meta/articles.xml"     target="articles"/>
+	<datasource type="support" mode="full" source="03_meta/meta.xml"         target="meta"/>
+	<datasource type="support" mode="full" source="00_content/microblog.xml" target="microblog"/>
 	<target     mode="plain"   value="archive/index.html"/> 
 </xsl:variable>
 
diff --git a/source/99_result/article/article.xsl b/source/99_result/article/article.xsl
index bbde793..1a6d2eb 100644
--- a/source/99_result/article/article.xsl
+++ b/source/99_result/article/article.xsl
@@ -8,8 +8,8 @@
 <xsl:include href="[utility/date-time.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="iterate" source="target/02_data/articles.xml" target="article"/>
-	<datasource type="support" mode="full"    source="target/03_meta/meta.xml" target="meta"/>
+	<datasource type="main"    mode="iterate" source="02_data/articles.xml" target="article"/>
+	<datasource type="support" mode="full"    source="03_meta/meta.xml" target="meta"/>
 	<target     mode="xpath"   value="concat(xalan:nodeset($datasource)/datasource/article/entry/@handle, '/index.html')"/>
 </xsl:variable>
 
diff --git a/source/99_result/atom.xsl b/source/99_result/atom.xsl
index da7f370..bfd038b 100644
--- a/source/99_result/atom.xsl
+++ b/source/99_result/atom.xsl
@@ -12,8 +12,8 @@
 />
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="full" source="target/02_data/articles.xml" target="articles"/>
-	<datasource type="support" mode="full" source="target/03_meta/meta.xml"     target="meta"/>
+	<datasource type="main"    mode="full" source="02_data/articles.xml" target="articles"/>
+	<datasource type="support" mode="full" source="03_meta/meta.xml"     target="meta"/>
 	<target     mode="plain"   value="atom.xml"/> 
 </xsl:variable>
 
diff --git a/source/99_result/category/category.xsl b/source/99_result/category/category.xsl
index e69640b..300b62f 100644
--- a/source/99_result/category/category.xsl
+++ b/source/99_result/category/category.xsl
@@ -9,8 +9,8 @@
 <xsl:include href="[utility/master.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="iterate" source="target/03_meta/categories.xml" target="category"/>
-	<datasource type="support" mode="full"    source="target/03_meta/meta.xml"       target="meta"/>
+	<datasource type="main"    mode="iterate" source="03_meta/categories.xml" target="category"/>
+	<datasource type="support" mode="full"    source="03_meta/meta.xml"       target="meta"/>
 	<target     mode="xpath"   value="concat(xalan:nodeset($datasource)/datasource/category/entry/@handle, '/index.html')"/>
 </xsl:variable>
 
diff --git a/source/99_result/page/page.xsl b/source/99_result/page/page.xsl
index 4bf62ba..ccee1de 100644
--- a/source/99_result/page/page.xsl
+++ b/source/99_result/page/page.xsl
@@ -7,8 +7,8 @@
 <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="target/03_meta/meta.xml"  target="meta"/>
+	<datasource type="main"    mode="iterate" source="02_data/pages.xml" target="page"/>
+	<datasource type="support" mode="full"    source="03_meta/meta.xml"  target="meta"/>
 	<target     mode="xpath"   value="concat(xalan:nodeset($datasource)/datasource/page/entry/@handle, '/index.html')"/>
 </xsl:variable>
 
diff --git a/source/99_result/stream.xsl b/source/99_result/stream.xsl
index 526b8db..4d93a2c 100644
--- a/source/99_result/stream.xsl
+++ b/source/99_result/stream.xsl
@@ -8,9 +8,9 @@
 <xsl:include href="[utility/date-time.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="iterate" source="target/03_meta/paginated_articles.xml" target="page"/>
-	<datasource type="support" mode="full"    source="target/03_meta/meta.xml"               target="meta"/>
-	<datasource type="support" mode="full"    source="target/02_data/articles.xml"           target="articles"/>
+	<datasource type="main"    mode="iterate" source="03_meta/paginated_articles.xml" target="page"/>
+	<datasource type="support" mode="full"    source="03_meta/meta.xml"               target="meta"/>
+	<datasource type="support" mode="full"    source="02_data/articles.xml"           target="articles"/>
 	<target     mode="xpath"   value="concat(xalan:nodeset($datasource)/datasource/page/entry/@index, '/index.html')"/>
 </xsl:variable>
 
diff --git a/source/99_result/tag/tag.xsl b/source/99_result/tag/tag.xsl
index fd79a3c..511a64f 100644
--- a/source/99_result/tag/tag.xsl
+++ b/source/99_result/tag/tag.xsl
@@ -7,8 +7,8 @@
 <xsl:include href="[utility/master.xsl]"/>
 
 <xsl:variable name="meta">
-	<datasource type="main"    mode="iterate" source="target/03_meta/tags.xml" target="tag"/>
-	<datasource type="support" mode="full"    source="target/03_meta/meta.xml" target="meta"/>
+	<datasource type="main"    mode="iterate" source="03_meta/tags.xml" target="tag"/>
+	<datasource type="support" mode="full"    source="03_meta/meta.xml" target="meta"/>
 	<target     mode="xpath"   value="concat(xalan:nodeset($datasource)/datasource/tag/entry/@handle, '/index.html')"/>
 </xsl:variable>