Backport: Check for file size on update CD/DVD generation

debian/changelog

@@ -11,6 +11,7 @@ debian-cd (3.1.17-jessie) UNRELEASED; urgency=medium
     + tools/start_new_disc: shorten VOLID when possible
     + tools/boot/jessie/boot-arm: Add kernels and other bits to
       armel/armhf images
+    + Check for file size on update CD/DVD generation
 
  -- Steve McIntyre <93sam@debian.org>  Mon, 20 Apr 2015 12:36:57 +0100
 

update-cd

@@ -310,6 +310,11 @@ do
             BACKOUT_FILE=""
         fi
 
+        size=$(stat -c %s $MIRROR/$file)
+        size_kib=$(($size / 1024))
+        if [ $size_kib -gt $CDSIZE ] ; then
+            echo "Ignoring file $file - it won't fit!"
+        else
             add_file $file
 
             SIZE_USED=`du -sk $UPD/CD$CDNUM | awk '{print $1}'`
@@ -326,6 +331,7 @@ do
                 CDNUM=$(($CDNUM + 1))
                 continue
             fi
+        fi
     done
 
     echo