Don't check mirror for source if NOSOURCE is set; improved error checking for mirror checks

build.sh

@@ -21,11 +21,14 @@ if [ "$SKIPMIRRORCHECK" = "yes" ]; then
     echo " ... WARNING: skipping mirror check"
 else
     echo " ... checking your mirror"
-    make mirrorcheck-binary
-    make mirrorcheck-source
-    if [ $? -gt 0 ]; then
-	    echo "ERROR: Your mirror has a problem, please correct it." >&2
-	    exit 1
+    RET=""
+    make mirrorcheck-binary || RET=$?
+    if [ -z "$RET" ] && [ -z "$NOSOURCE" ]; then
+	make mirrorcheck-source || RET=$?
+    fi
+    if [ "$RET" ]; then
+	echo "ERROR: Your mirror has a problem, please correct it." >&2
+	exit 1
     fi
 fi
 echo " ... selecting packages to include"