Restore default apt sources once stemcell is built

bosh-stemcell/lib/bosh/stemcell/stage_collection.rb

@@ -263,6 +263,7 @@ def softlayer_stages
     def finish_stemcell_stages
       [
         :bosh_package_list,
+        :restore_apt_sources,
       ]
     end
 

bosh-stemcell/spec/bosh/stemcell/stage_collection_spec.rb

@@ -96,6 +96,7 @@ module Bosh::Stemcell
             :image_install_grub,
             :sbom_create,
             :bosh_package_list,
+            :restore_apt_sources,
           ]
         }
         let(:aws_package_stemcell_stages) {
@@ -127,6 +128,7 @@ module Bosh::Stemcell
             :image_install_grub,
             :sbom_create,
             :bosh_package_list,
+            :restore_apt_sources,
           ]
         }
 
@@ -160,6 +162,7 @@ module Bosh::Stemcell
             :image_install_grub,
             :sbom_create,
             :bosh_package_list,
+            :restore_apt_sources,
           ]
         }
 
@@ -196,6 +199,7 @@ module Bosh::Stemcell
               :image_install_grub,
               :sbom_create,
               :bosh_package_list,
+              :restore_apt_sources,
             ]
           )
           expect(stage_collection.package_stemcell_stages('qcow2')).to eq(
@@ -227,6 +231,7 @@ module Bosh::Stemcell
               :image_install_grub,
               :sbom_create,
               :bosh_package_list,
+              :restore_apt_sources,
             ]
           )
           expect(stage_collection.package_stemcell_stages('qcow2')).to eq(
@@ -257,6 +262,7 @@ module Bosh::Stemcell
               :image_install_grub_efi,
               :sbom_create,
               :bosh_package_list,
+              :restore_apt_sources,
             ]
           )
           expect(stage_collection.package_stemcell_stages('ovf')).to eq(vmware_package_stemcell_steps)
@@ -285,6 +291,7 @@ module Bosh::Stemcell
                 :image_install_grub_efi,
                 :sbom_create,
                 :bosh_package_list,
+                :restore_apt_sources,
             ]
             )
             expect(stage_collection.package_stemcell_stages('ovf')).to eq(vmware_package_stemcell_steps)
@@ -310,6 +317,7 @@ module Bosh::Stemcell
             :image_install_grub,
             :sbom_create,
             :bosh_package_list,
+            :restore_apt_sources,
           ]
         }
 
@@ -348,7 +356,8 @@ module Bosh::Stemcell
                 :bosh_clean_ssh,
                 :image_create_softlayer_two_partitions,
                 :image_install_grub_softlayer_two_partitions,
-                :bosh_package_list
+                :bosh_package_list,
+                :restore_apt_sources,
               ]
             )
             expect(stage_collection.package_stemcell_stages('ovf')).to eq(vmware_package_stemcell_steps)
@@ -368,7 +377,8 @@ module Bosh::Stemcell
             :image_create,
             :image_install_grub,
             :sbom_create,
-            :bosh_package_list
+            :bosh_package_list,
+            :restore_apt_sources,
           ]
         }
         let(:package_stemcell_stages) {

stemcell_builder/stages/restore_apt_sources/apply.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+
+base_dir=$(readlink -nf $(dirname $0)/../..)
+source $base_dir/lib/prelude_apply.bash
+
+mount --bind /sys "$chroot/sys"
+add_on_exit "umount $chroot/sys"
+
+cat > "$chroot/etc/apt/sources.list" <<EOS
+deb http://archive.ubuntu.com/ubuntu $DISTRIB_CODENAME main universe multiverse
+deb http://archive.ubuntu.com/ubuntu $DISTRIB_CODENAME-updates main universe multiverse
+deb http://security.ubuntu.com/ubuntu $DISTRIB_CODENAME-security main universe multiverse
+EOS