bootstrap/gcc/vars.sh: new file (externalize variables from build.sh …

…to allow resumable bootstrap)

bootstrap/gcc: source ./vars.sh
lib.sh: bootstrap () : skip build of package when packages/$DISTVER.zip is already present and print a Warning

bootstrap/gcc/build.sh

@@ -10,7 +10,7 @@ set -e
 source ../../lib.sh
 TASK=build
 
-DISTVER="gcc"
+source ./vars.sh
 
 package_init "$@"
 

bootstrap/gcc/vars.sh

@@ -0,0 +1,6 @@
+#
+# Olivier Kaloudoff <olivier.kaloudoff@gmail.com>
+# 2018
+#
+
+DISTVER="gcc"

lib.sh

@@ -164,6 +164,13 @@ function bootstrap()
   do
     if [ -d "$dir" ] && [ -e "$dir/build.sh" ]
     then
+	[ -f "$dir/vars.sh" ] && {
+		. $dir/vars.sh
+		[ -f ../packages/$DISTVER.zip ] && {
+			echo "Warning: skipping build of $DISTVER (file packages/$DISTVER.zip already exists) "
+			continue;
+		}
+	}
       echo "Building $dir"
       cd "$dir"
       ./build.sh $SUBTASKFLAG $SUBTASK