From 62d1b834752993dc9969ec216b79157ab115dd2b Mon Sep 17 00:00:00 2001
From: Bob Stayton <bobs@sagehill.net>
Date: Mon, 22 Oct 2012 21:14:23 +0000
Subject: [PATCH] Exit when detects Xalan processor because it does not
 properly support output method="text" which is needed for generating the
 mime-type and other support files.

---
 xsl/epub3/epub3-chunk-mods.xsl | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/xsl/epub3/epub3-chunk-mods.xsl b/xsl/epub3/epub3-chunk-mods.xsl
index b4ea68d66..7aa690122 100644
--- a/xsl/epub3/epub3-chunk-mods.xsl
+++ b/xsl/epub3/epub3-chunk-mods.xsl
@@ -28,6 +28,7 @@
 
 <!-- EPUB3: customize to generate package files -->
 <xsl:template match="*" mode="process.root" priority="2">
+  <xsl:call-template name="check.for.xalan"/>
   <xsl:apply-templates select="."/>
   <xsl:call-template name="generate.css.files"/>
 
@@ -35,4 +36,16 @@
 
 </xsl:template>
 
+<xsl:template name="check.for.xalan">
+  <xsl:if test="contains(system-property('xsl:vendor'), 'Apache Software Foundation')">
+    <xsl:message terminate="yes">
+      <xsl:text>&#10;</xsl:text>
+      <xsl:text>FATAL ERROR: </xsl:text>
+      <xsl:text>Xalan processor not supported by DocBook Epub3 stylesheets. </xsl:text>
+      <xsl:text>Xalan does not properly support XSL output method="text", </xsl:text>
+      <xsl:text>which is required for the various epub support files.</xsl:text>
+    </xsl:message>
+  </xsl:if>
+</xsl:template>
+
 </xsl:stylesheet>
-- 
2.40.0