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#!/usr/bin/bash
set -euo pipefail
file=/usr/libexec/os-branch-select
if [[ ! -f "$file" ]]; then
echo "Unable to locate Bazzite OS branch selector: $file" >&2
exit 1
fi
old=' branch=$(cut -d ":" -f4 <<< "$(rpm-ostree status --booted | grep -m 1 $ID)")'
if ! grep -Fxq "$old" "$file"; then
echo "Bazzite OS branch selector changed; review the downstream patch" >&2
exit 1
fi
patched_file=$(mktemp)
awk -v old="$old" '
$0 == old {
print " # Read the booted deployment directly; its image name need not match os-release ID."
print " image_ref=$(rpm-ostree status --booted --json | jq -r '\''[.deployments[] | select(.booted) | .[\"container-image-reference\"] // empty][0] // empty'\'')"
print " branch=\"\""
print " if [[ $image_ref =~ :([^/:]+)$ ]]; then"
print " branch=${BASH_REMATCH[1]}"
print " fi"
found++
next
}
{ print }
END { if (found != 1) exit 1 }
' "$file" > "$patched_file"
install -m 0755 "$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
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