include cover image in metadata

g2e.awk

@@ -53,7 +53,8 @@ BEGIN{
 	}
 
 	# start writing metadata files
-	content = write_template( "content-header.opf", meta )
+	content_header = write_template( "content-header.opf", meta )
+	content = write_template("content-manifest-header.opf", meta )
 	toc = write_template( "toc-header.ncx", meta )
 	spinetoc = "  <spine toc=\"ncx\">\n"
 }
@@ -108,13 +109,19 @@ ARGIND==2 && FNR==1{
 		id = dest
 		sub(/^.+\//,"",id) # get basename
 
-		properties = id~/cover/ ? "properties=\"cover-image\"" : ""
+		properties = ""
+		if(id~/cover/){
+			properties = "properties=\"cover-image\""
+			content_header = content_header "    <meta content=\"" id "\" name=\"cover\">\n"
+		}
 		content = content "    <item id=\"" id "\" href=\"" dest "\" media-type=\"" mediatype "\" " properties "/>\n"
 	}
 	$0 = line
 
 	# finalize metadata files
+	content_header = content_header "  </metadata>\n\n"
 	content = content "  </manifest>\n\n" spinetoc "  </spine>\n\n</package>"
+	content = content_header content
 	print content > epubodir "content.opf"
 
 	toc = toc "  </navMap>\n</ncx>"

templates/content-header.opf

@@ -8,8 +8,3 @@
     <dc:creator opf:role="aut">{author}</dc:creator>
     <dc:description>{description}</dc:description>
     <dc:date>{publishDate}</dc:date>
-  </metadata>
-
-  <manifest>
-    <item id="stylesheet" href="style.css" media-type="text/css"/>
-    <item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>

templates/content-manifest-header.opf

@@ -0,0 +1,3 @@
+  <manifest>
+    <item id="stylesheet" href="style.css" media-type="text/css"/>
+    <item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>