Add channel-aware release tooling and updater recovery

scripts/build-release.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [[ $# -ne 3 ]]
+then
+	printf 'Usage: %s VERSION CHANNEL OUTPUT_DIR\n' "$0" >&2
+	exit 2
+fi
+
+SCRIPT_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd -- "${SCRIPT_ROOT}/.." && pwd)"
+PYTHON_BIN="${PTLINUX_PYTHON:-python3}"
+VERSION="$1"
+CHANNEL="$2"
+OUTPUT_DIRECTORY="$3"
+
+cd -- "$PROJECT_ROOT"
+
+ARGUMENTS=(
+	"${SCRIPT_ROOT}/build_release.py"
+	"$VERSION"
+	"$CHANNEL"
+	"$OUTPUT_DIRECTORY"
+)
+
+if [[ -n "${REPOSITORY_URL:-}" ]]
+then
+	ARGUMENTS+=(--repository-url "$REPOSITORY_URL")
+fi
+if [[ -n "${RELEASE_TAG:-}" ]]
+then
+	ARGUMENTS+=(--tag "$RELEASE_TAG")
+fi
+if [[ -n "${RELEASE_COMMIT:-}" ]]
+then
+	ARGUMENTS+=(--commit "$RELEASE_COMMIT")
+fi
+if [[ -n "${SOURCE_DATE_EPOCH:-}" ]]
+then
+	ARGUMENTS+=(--source-date-epoch "$SOURCE_DATE_EPOCH")
+fi
+if [[ -n "${RELEASE_NOTES_FILE:-}" ]]
+then
+	ARGUMENTS+=(--release-notes "$RELEASE_NOTES_FILE")
+fi
+if [[ "${REQUIRE_RELEASE_SIGNATURE:-0}" == "1" ]]
+then
+	ARGUMENTS+=(--require-signature)
+fi
+if [[ "${ALLOW_SOURCE_VERSION_OVERRIDE:-0}" == "1" ]]
+then
+	ARGUMENTS+=(--allow-source-version-override)
+fi
+if [[ -n "${RELEASE_ARCHIVE_LAYOUT:-}" ]]
+then
+	ARGUMENTS+=(--archive-layout "$RELEASE_ARCHIVE_LAYOUT")
+fi
+
+exec "$PYTHON_BIN" "${ARGUMENTS[@]}"