Migrate allowing sub-namespaces to labels as well

apps/prismlauncher/Containerfile

@@ -12,5 +12,7 @@ RUN apt-get -y update && apt-get -y install prismlauncher qtwayland5 openjdk-17-
 
 USER user
 
+LABEL net.typeblog.dobu.desktop_file_path="/usr/share/applications/org.prismlauncher.PrismLauncher.desktop"
+
 ENTRYPOINT [ "/usr/bin/prismlauncher" ]
 

apps/shattered-pixel-dungeon/Containerfile

@@ -9,4 +9,6 @@ RUN pacman -Syu --noconfirm \
 
 USER user
 
+LABEL net.typeblog.dobu.desktop_file_path="/usr/share/applications/shattered-pixel-dungeon.desktop"
+
 ENTRYPOINT [ "/usr/bin/shattered-pixel-dungeon" ]

apps/shattered-pixel-dungeon/control

@@ -1,3 +1,2 @@
 #!/usr/bin/env bash
 INVALIDATE_CACHE_UPSTREAM_ARCHLINUX="extra/any/shattered-pixel-dungeon"
-DESKTOP_FILE_PATH="/usr/share/applications/shattered-pixel-dungeon.desktop"

apps/steam/Containerfile

@@ -8,4 +8,11 @@ USER user
 
 ENV PROTON_NO_FSYNC=1
 
+LABEL net.typeblog.dobu.desktop_file_path="/usr/share/applications/steam.desktop"
+
+# Steam Runtime requires its own namespaces
+# so we have to allow them in our seccomp filter.
+# Don't use it if you don't trust their sandboxing (pressure-vessel).
+LABEL net.typeblog.dobu.unsafe_i_know_what_i_am_doing_allow_namespaces="true"
+
 ENTRYPOINT [ "/usr/games/steam" ]

apps/steam/control

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 INVALIDATE_CACHE_UPSTREAM_UBUNTU="steam"
-DESKTOP_FILE_PATH="/usr/share/applications/steam.desktop"
 # Steam Runtime requires its own namespaces
 # so we have to allow them in our seccomp filter.
 # Don't use it if you don't trust their sandboxing (pressure-vessel).

create-shortcut.sh

@@ -12,9 +12,9 @@ assert_image_exists "$image_name"
 [ -f "$script_path/apps/$1/control" ] || \
   die "App $1 does not have a control file that defines how to generate a shortcut"
 
-. "$script_path/apps/$1/control"
+desktop_file_path="$(get_image_label "$image_name" "net.typeblog.dobu.desktop_file_path")"
 
-[ -z "${DESKTOP_FILE_PATH+x}" ] && die "App $1 did not specify DESKTOP_FILE_PATH in its control file"
+[ -z "$desktop_file_path" ] && die "App $1 did not specify desktop_file_path in its labels"
 
 # Create a temporary working directory
 # Because we will have to extract files from the container image
@@ -36,8 +36,8 @@ log "Creating temporary container $tmp_container_name from $image_name"
 
 podman create --name "$tmp_container_name" "$image_name"
 
-log "Extracting $DESKTOP_FILE_PATH from $tmp_container_name"
-podman cp "$tmp_container_name:$DESKTOP_FILE_PATH" ./$1.desktop
+log "Extracting $desktop_file_path from $tmp_container_name"
+podman cp "$tmp_container_name:$desktop_file_path" ./$1.desktop
 
 log "Extracting /usr/share/icons from $tmp_container_name"
 podman cp "$tmp_container_name:/usr/share/icons" ./icons

dobu-run.sh

@@ -26,11 +26,7 @@ if container_exists "$container_name"; then
   exit 0
 fi
 
-# Load app control file because some apps require run-time customization
-# TODO: Maybe these things should really be container labels?
-[ -f "$script_path/apps/$1/control" ] && . "$script_path/apps/$1/control"
-
-if [ "$UNSAFE_I_KNOW_WHAT_I_AM_DOING_ALLOW_NAMESPACES" == "true" ]; then
+if [ "$(get_image_label "$image_name" net.typeblog.dobu.unsafe_i_know_what_i_am_doing_allow_namespaces)" == "true" ]; then
   log "Enabling sub-namespaces support inside this container"
   log "This is considered UNSAFE; DO NOT USE if the app inside container does not do its own sandboxing"
   log "DO NOT USE if you don't trust sandboxing done by the app inside"

functions.sh

@@ -72,6 +72,11 @@ container_exists() {
   podman container exists $1 > /dev/null 2>&1
 }
 
+get_image_label() {
+  assert_image_exists "$1"
+  podman inspect "$1" | jq -r ".[0].Labels.\"$2\""
+}
+
 remove_stale_container() {
   container_exists "$1" || return 0
   local is_running="$(podman inspect "$1" | jq -r '.[0].State.Running')"