fix: align Game Mode update channels with newstesting-44.20261023.1

Select the feed matching each image branch and expose Steam channels
that match the announcement data for testing and unstable builds.

2 files changed, 32 insertions, 3 deletions

diff --git a/build_files/build.sh b/build_files/build.sh
index 1875ddf..94a5ef5 100755
--- a/build_files/build.sh
+++ b/build_files/build.sh
@@ -14,17 +14,23 @@ esac
 # Copy the contents of system_files/ of the git repo to /
 cp -avf "/ctx/system_files"/. /
 
-# Keep Bazzite's game mode news hook unchanged; only switch its feed URL.
+# Keep Bazzite's game mode news hook unchanged; select the matching feed branch.
 NEWS_HOOK_CONFIG=/etc/gamemode-news-hook.conf
 if [[ ! -f "${NEWS_HOOK_CONFIG}" ]]; then
   echo "Unable to locate game mode news hook config: ${NEWS_HOOK_CONFIG}" >&2
   exit 1
 fi
+NEWS_BRANCH="${IMAGE_BRANCH:-stable}"
+case "${NEWS_BRANCH}" in
+  testing|unstable) ;;
+  *) NEWS_BRANCH=stable ;;
+esac
+NEWS_FEED_URL="https://git.mirror.aerocore.com.cn/AeroCore-IO/aerocore-os-gamemode-news/plain/announcements.json?h=${NEWS_BRANCH}"
 sed -i \
-  's|^github = .*|github = https://git.mirror.aerocore.com.cn/AeroCore-IO/aerocore-os-gamemode-news/plain/announcements.json?h=testing|' \
+  "s|^github = .*|github = ${NEWS_FEED_URL}|" \
   "${NEWS_HOOK_CONFIG}"
 grep -Fxq \
-  'github = https://git.mirror.aerocore.com.cn/AeroCore-IO/aerocore-os-gamemode-news/plain/announcements.json?h=testing' \
+  "github = ${NEWS_FEED_URL}" \
   "${NEWS_HOOK_CONFIG}"
 
 # Bazzite's Kinoite/Plasma desktop shortcut used to start a privileged
diff --git a/build_files/patch-bazzite-os-branch-select.sh b/build_files/patch-bazzite-os-branch-select.sh
index 544b1a5..a360a2e 100755
--- a/build_files/patch-bazzite-os-branch-select.sh
+++ b/build_files/patch-bazzite-os-branch-select.sh
@@ -33,3 +33,26 @@ awk -v old="$old" '
 
 install -m 0755 "$patched_file" "$file"
 rm -f "$patched_file"
+
+# Match the channel names used by Bazzite's Game Mode announcement feeds.
+# Steam's rc/beta and bc/main aliases still select the same image branches.
+python3 - "$file" <<'PY'
+from pathlib import Path
+import sys
+
+path = Path(sys.argv[1])
+text = path.read_text()
+replacements = {
+    "        testing)\n          echo rc\n": "        testing)\n          echo beta\n",
+    "        unstable)\n          echo main\n": "        unstable)\n          echo preview\n",
+    "      echo rc\n      echo beta\n      echo bc\n      echo main\n":
+        "      echo rc\n      echo beta\n      echo bc\n      echo preview\n      echo main\n",
+    "    bc|main|unstable)\n": "    bc|preview|main|unstable)\n",
+}
+for old in replacements:
+    if text.count(old) != 1:
+        raise SystemExit(f"Bazzite branch selector changed; expected exactly one {old!r}")
+for old, new in replacements.items():
+    text = text.replace(old, new, 1)
+path.write_text(text)
+PY