Add GreptimeDB Alpine service packaging

scripts/apk/export-ci-assets.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+repo_name="${ALPINE_REPO_NAME:-local}"
+package_name="${ALPINE_PACKAGE:-greptimedb}"
+package_root="${repo_root}/packages/${repo_name}"
+assets_dir="${CI_ASSETS_DIR:-${repo_root}/packages/ci-assets}"
+
+if [[ ! -d "${package_root}" ]]; then
+	printf 'missing local package repository: %s\n' "${package_root}" >&2
+	exit 1
+fi
+
+mkdir -p "${assets_dir}"
+
+shopt -s nullglob
+apks=("${package_root}"/*/"${package_name}"-[0-9]*.apk)
+shopt -u nullglob
+
+if [[ "${#apks[@]}" -eq 0 ]]; then
+	printf 'no %s APK files found under %s\n' "${package_name}" "${package_root}" >&2
+	exit 1
+fi
+
+for apk in "${apks[@]}"; do
+	arch="$(basename "$(dirname "${apk}")")"
+	pkgver="$(
+		tar -xOf "${apk}" .PKGINFO 2>/dev/null \
+			| awk -F' = ' '$1 == "pkgver" { print $2; exit }'
+	)"
+	version="${pkgver%-r*}"
+	asset="${assets_dir}/greptime-linux-${arch}-musl-v${version}"
+
+	printf 'Exporting %s\n' "${asset}"
+	tar -xOf "${apk}" usr/bin/greptime > "${asset}"
+	chmod 0755 "${asset}"
+	sha256sum "${asset}" > "${asset}.sha256sum"
+done