Fix unzip's helper to work with last set of changes.

--HG--
extra : convert_revision : 69852888e9293ee0bbbcd8aa380f8dc6a7403e02

helper-templates/unzip-extraction.sh

@@ -3,26 +3,28 @@
 # This checks if unzip is installed and installs it if it's not
 # and sets the unzip_cmd/extract_cmd variables appropiately.
 #
-unzip_version="5.52"
-
-# Save pkgname before installing unzip.
-save_pkgname=$pkgname
-
 # If unzip is already installed just return immediately.
-check_installed_tmpl unzip-$unzip_version
-if [ "$?" -ne 0 ]; then
-	echo "=> unzip not installed, will install it."
-	install_tmpl unzip
-	#
-	# Continue with previous template that called us.
-	#
-	reset_tmpl_vars
-	run_file $PKGFS_TEMPLATESDIR/$save_pkgname.tmpl
-	check_tmpl_vars $save_pkgname
-fi
+if [ ! -x $PKGFS_MASTERDIR/bin/unzip ]; then
+	unzip_version="5.52"
 
-unset save_pkgname
-unset unzip_version
+	# Save pkgname before installing unzip.
+	save_pkgname=$pkgname
+
+	check_installed_tmpl unzip $unzip_version
+	if [ "$?" -ne 0 ]; then
+		echo "=> unzip not installed, will install it."
+		install_tmpl unzip
+		#
+		# Continue with previous template that called us.
+		#
+		reset_tmpl_vars
+		run_file $PKGFS_TEMPLATESDIR/$save_pkgname.tmpl
+		check_tmpl_vars $save_pkgname
+	fi
+
+	unset save_pkgname
+	unset unzip_version
+fi
 
 unzip_cmd=$PKGFS_MASTERDIR/bin/unzip
 extract_cmd="$unzip_cmd -x $dfile -d $PKGFS_BUILDDIR"