Add multi-package Alpine packaging

packaging/alpine/blueprint/scripts/test-install.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="${REPO_ROOT:-$(cd "$(dirname "${BASH_SOURCE[0]}")/../../../../.." && pwd)}"
+package_name="${PACKAGE_NAME:-$(basename "$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)")}"
+alpine_version="${ALPINE_VERSION:-3.23}"
+arch="${ALPINE_ARCH:-x86_64}"
+
+case "${arch}" in
+  x86_64)
+    platform="${ALPINE_TEST_PLATFORM:-linux/amd64}"
+    ;;
+  aarch64)
+    platform="${ALPINE_TEST_PLATFORM:-linux/arm64}"
+    ;;
+  *)
+    printf 'unsupported Alpine architecture: %s\n' "${arch}" >&2
+    exit 2
+    ;;
+esac
+
+if [[ "${SKIP_BUILD:-0}" != "1" ]]; then
+  ALPINE_PACKAGE="${package_name}" "${repo_root}/scripts/apk/build.sh" build "${arch}"
+fi
+
+docker run --rm --platform "${platform}" \
+  -e "ALPINE_ARCH=${arch}" \
+  -e "PACKAGE_NAME=${package_name}" \
+  -v "${repo_root}/packages/local:/repo:ro" \
+  "alpine:${alpine_version}" \
+  sh -lc '
+    set -e
+
+    cp "/repo/${ALPINE_ARCH}"/*.rsa.pub /etc/apk/keys/
+    printf "%s\n" /repo >> /etc/apk/repositories
+    apk update
+    apk add "${PACKAGE_NAME}"
+
+    # Replace these with package-specific install assertions.
+    apk info -e "${PACKAGE_NAME}"
+  '

packaging/alpine/blueprint/scripts/update-generated-sources.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+package_dir="${PACKAGE_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"
+
+printf 'No generated sources for %s\n' "${package_dir}"