Introduced new "directory" task type

* tasks of this type expect a path node providing the directory tree to be created
** the path is passed to `mkdir --parents $path` which does the actual work
* this addition was introduced to fix failing `create_link` calls in cases where the link is created before the actual directory is created as a side-effect of `InputXSLT:generate`
** this side-effect causes `InputXSLT:generate` to be impure and should be elimniated in InputXSLT if possible
*** the current hindrance preventing me from doing just that are the `xpath` target declarations which depend on this behaviour

2 files changed, 49 insertions, 22 deletions

diff --git a/src/steps/plan.xsl b/src/steps/plan.xsl
index 653a9ca..88ecbdb 100644
--- a/src/steps/plan.xsl
+++ b/src/steps/plan.xsl
@@ -23,28 +23,13 @@
 	<xsl:param name="path"/>
 	<xsl:param name="node"/>
 
-	<xsl:for-each select="$node/directory">
-		<xsl:choose>
-			<xsl:when test=".//file/@extension = '.xsl'">
-				<xsl:call-template name="traverse">
-					<xsl:with-param name="source" select="$source"/>
-					<xsl:with-param name="target" select="$target"/>
-					<xsl:with-param name="path"   select="concat($path, '/', @name)"/>
-					<xsl:with-param name="node"   select="."/>
-				</xsl:call-template>
-			</xsl:when>
-			<xsl:otherwise>
-				<task type="link">
-					<from>
-						<xsl:value-of select="concat($target, '/', $path, '/', @name)"/>
-					</from>
-					<to>
-						<xsl:value-of select="concat($source, '/', $path, '/', @name)"/>
-					</to>
-				</task>
-			</xsl:otherwise>
-		</xsl:choose>
-	</xsl:for-each>
+	<xsl:if test="count($node/file | $node/directory) &gt; 0">
+		<task type="directory">
+			<path>
+				<xsl:value-of select="concat($target, '/', $path)"/>
+			</path>
+		</task>
+	</xsl:if>
 
 	<xsl:for-each select="$node/file">
 		<xsl:choose>
@@ -75,6 +60,29 @@
 			</xsl:when>
 		</xsl:choose>
 	</xsl:for-each>
+
+	<xsl:for-each select="$node/directory">
+		<xsl:choose>
+			<xsl:when test=".//file/@extension = '.xsl'">
+				<xsl:call-template name="traverse">
+					<xsl:with-param name="source" select="$source"/>
+					<xsl:with-param name="target" select="$target"/>
+					<xsl:with-param name="path"   select="concat($path, '/', @name)"/>
+					<xsl:with-param name="node"   select="."/>
+				</xsl:call-template>
+			</xsl:when>
+			<xsl:otherwise>
+				<task type="link">
+					<from>
+						<xsl:value-of select="concat($target, '/', $path, '/', @name)"/>
+					</from>
+					<to>
+						<xsl:value-of select="concat($source, '/', $path, '/', @name)"/>
+					</to>
+				</task>
+			</xsl:otherwise>
+		</xsl:choose>
+	</xsl:for-each>
 </xsl:template>
 
 <xsl:template match="datasource">
diff --git a/src/steps/process.xsl b/src/steps/process.xsl
index 29599f4..67c7f24 100644
--- a/src/steps/process.xsl
+++ b/src/steps/process.xsl
@@ -28,6 +28,14 @@
 	)/self::command/@result"/>
 </xsl:template>
 
+<xsl:template name="create_directory">
+	<xsl:param name="path"/>
+
+	<xsl:value-of select="InputXSLT:external-command(
+		concat('mkdir --parents ./', $path)
+	)/self::command/@result"/>
+</xsl:template>
+
 <xsl:template name="clean">
 	<xsl:param name="path"/>
 
@@ -268,4 +276,15 @@
 	</xsl:copy>
 </xsl:template>
 
+<xsl:template match="task[@type = 'directory']">
+	<xsl:copy>
+		<xsl:attribute name="result">
+			<xsl:call-template name="create_directory">
+				<xsl:with-param name="path" select="path"/>
+			</xsl:call-template>
+		</xsl:attribute>
+		<xsl:copy-of select="@* | node()"/>
+	</xsl:copy>
+</xsl:template>
+
 </xsl:stylesheet>