vmware-bundle eclass. provides extract functionality.

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diff --git a/eclass/vmware-bundle.eclass b/eclass/vmware-bundle.eclass
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+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/vmware-bundle.eclass,v 1.1 2011/03/17 18:23:40 vadimk Exp $
+
+# @ECLASS: vmware-bundle.eclass
+# @MAINTAINER: <vmware@gentoo.org>
+# @BLURB: Provides extract functionality for vmware products bundles
+# @DESCRIPTION:
+#
+# @AUTHOR: Matt Whitlock <matt@whitlock.name> 
+
+DEPEND="dev-libs/libxslt"
+
+vmware-bundle_extract-bundle-component() {
+	local bundle=${1:?} component=${2:?} dest=${3:-${2}}
+	cat > "${T}"/list-bundle-components.xsl <<-EOF
+		<?xml version="1.0" encoding="ISO-8859-1"?>
+		<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+			<xsl:output omit-xml-declaration="yes"/>
+			<xsl:template match="text()"/>
+			<xsl:template match="/bundle/components/component">
+				<xsl:value-of select="@offset"/>
+				<xsl:text> </xsl:text>
+				<xsl:value-of select="@size"/>
+				<xsl:text> </xsl:text>
+				<xsl:value-of select="@name"/>
+				<xsl:text>&#10;</xsl:text>
+			</xsl:template>
+		</xsl:stylesheet>
+		EOF
+	local -i bundle_size=$(stat -L -c'%s' "${bundle}")
+	local -i bundle_manifestOffset=$(od -An -j$((bundle_size-36)) -N4 -tu4 "${bundle}")
+	local -i bundle_manifestSize=$(od -An -j$((bundle_size-40)) -N4 -tu4 "${bundle}")
+	local -i bundle_dataOffset=$(od -An -j$((bundle_size-44)) -N4 -tu4 "${bundle}")
+	local -i bundle_dataSize=$(od -An -j$((bundle_size-52)) -N8 -tu8 "${bundle}")
+	tail -c+$((bundle_manifestOffset+1)) "${bundle}" 2> /dev/null | head -c$((bundle_manifestSize)) |
+		xsltproc "${T}"/list-bundle-components.xsl - |
+		while read -r component_offset component_size component_name ; do
+			if [[ ${component_name} == ${component} ]] ; then
+				ebegin "Extracting '${component_name}' component from '$(basename "${bundle}")'"
+				vmware-bundle_extract-component "${bundle}" "${dest}" $((bundle_dataOffset+component_offset))
+				eend
+			fi
+		done
+}
+
+vmware-bundle_extract-component() {
+	local component=${1:?} dest=${2:-.}
+	local -i offset=${3}
+	cat > "${T}"/list-component-files.xsl <<-EOF
+		<?xml version="1.0" encoding="ISO-8859-1"?>
+		<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+			<xsl:output omit-xml-declaration="yes"/>
+			<xsl:template match="text()"/>
+			<xsl:template match="/component/fileset/file">
+				<xsl:value-of select="@offset"/>
+				<xsl:text> </xsl:text>
+				<xsl:value-of select="@compressedSize"/>
+				<xsl:text> </xsl:text>
+				<xsl:value-of select="@uncompressedSize"/>
+				<xsl:text> </xsl:text>
+				<xsl:value-of select="@path"/>
+				<xsl:text>&#10;</xsl:text>
+			</xsl:template>
+		</xsl:stylesheet>
+		EOF
+	local -i component_manifestOffset=$(od -An -j$((offset+9)) -N4 -tu4 "${component}")
+	local -i component_manifestSize=$(od -An -j$((offset+13)) -N4 -tu4 "${component}")
+	local -i component_dataOffset=$(od -An -j$((offset+17)) -N4 -tu4 "${component}")
+	local -i component_dataSize=$(od -An -j$((offset+21)) -N8 -tu8 "${component}")
+	tail -c+$((offset+component_manifestOffset+1)) "${component}" 2> /dev/null |
+		head -c$((component_manifestSize)) | xsltproc "${T}"/list-component-files.xsl - |
+		while read -r file_offset file_compressedSize file_uncompressedSize file_path ; do
+			if [[ ${file_path} ]] ; then
+				echo -n '.'
+				file_path="${dest}/${file_path}"
+				mkdir -p "$(dirname "${file_path}")" || die
+				tail -c+$((offset+component_dataOffset+file_offset+1)) "${component}" 2> /dev/null |
+					head -c$((file_compressedSize)) | gzip -cd > "${file_path}" || die
+			fi
+		done
+	echo
+}