aufs: fixed pkg_linux_post.conf to only try to unpack aufs kernel sources if it found a matching source file

filesystem/aufs/pkg_linux_post.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../aufs/pkg_linux_post.conf
-# Copyright (C) 2010 The OpenSDE Project
+# Copyright (C) 2010 - 2011 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -16,19 +16,23 @@
 pkg_aufs_ver="$( pkgdesc ver aufs )"
 pkg_aufs_source_file=`match_source_file -p aufs${pkg_aufs_ver}-standalone-linux aufs`
 
-# extracting Aufs sources into a tempdir
-pkg_aufs_tempdir=$( mktemp -d )
-tar -C $pkg_aufs_tempdir -xf $pkg_aufs_source_file
+# extracting Aufs sources into a tempdir if we found a matching source file
+if [ ! -z "$pkg_aufs_source_file" ]; then
+	pkg_aufs_tempdir=$( mktemp -d )
+	tar -C $pkg_aufs_tempdir -xf $pkg_aufs_source_file
 
-# patching the kernel sources
-echo_status "Including Aufs2 support (aufs package enabled)"
-var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-kbuild.patch"
-var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-base.patch"
-var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-standalone.patch"
+	# patching the kernel sources
+	echo_status "Including Aufs2 support (aufs package enabled)"
+	var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-kbuild.patch"
+	var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-base.patch"
+	var_append patchfiles ' ' "$pkg_aufs_tempdir/aufs2-standalone/aufs2-standalone.patch"
 
-# copying sources into kernel source tree
-pkg_aufs_copy_source_files() {
-	cp -rv $pkg_aufs_tempdir/aufs2-standalone/{Documentation,fs} .
-	cp -rv $pkg_aufs_tempdir/aufs2-standalone/include/linux/aufs_type.h include/linux/
-}
-hook_add preconf 5 "pkg_aufs_copy_source_files"
+	# copying sources into kernel source tree
+	pkg_aufs_copy_source_files() {
+		cp -rv $pkg_aufs_tempdir/aufs2-standalone/{Documentation,fs} .
+		cp -rv $pkg_aufs_tempdir/aufs2-standalone/include/linux/aufs_type.h include/linux/
+	}
+	hook_add preconf 5 "pkg_aufs_copy_source_files"
+else
+	echo_warning "No matching source file found for Aufs2 support"
+fi