parallel CI package builds

scripts/apk/ci-package-cache.sh

@@ -138,6 +138,7 @@ prepare() {
     } >> "${GITHUB_ENV}"
   fi
   if [[ -n "${GITHUB_OUTPUT:-}" ]]; then
+    printf 'selected_packages=%s\n' "${ALPINE_PACKAGES}" >> "${GITHUB_OUTPUT}"
     if [[ -n "${ALPINE_PACKAGES}" ]]; then
       printf 'packages_selected=true\n' >> "${GITHUB_OUTPUT}"
     else

scripts/apk/merge-ci-artifacts.sh

@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+repo_name="${ALPINE_REPO_NAME:-local}"
+arches="${ALPINE_ARCHES:-x86_64 aarch64}"
+artifact_root="${APK_CI_ARTIFACTS_DIR:-${repo_root}/packages/worker-artifacts}"
+package_root="${APK_CI_PACKAGE_ROOT:-${repo_root}/packages/${repo_name}}"
+keys_root="$(mktemp -d)"
+
+cleanup() {
+  rm -rf "${keys_root}"
+}
+trap cleanup EXIT
+
+require_command() {
+  command -v "$1" >/dev/null 2>&1 || {
+    printf 'missing required command: %s\n' "$1" >&2
+    exit 2
+  }
+}
+
+copy_key() {
+  local key="$1"
+  local destination="$2"
+  local digest
+
+  digest="$(sha256sum "${key}" | awk '{print $1}')"
+  cp "${key}" "${destination}/${digest}.rsa.pub"
+}
+
+require_command abuild-keygen
+require_command abuild-sign
+require_command apk
+
+if [[ ! -d "${artifact_root}" ]]; then
+  printf 'missing worker artifacts directory: %s\n' "${artifact_root}" >&2
+  exit 1
+fi
+
+rm -rf "${package_root}"
+mkdir -p "${package_root}" "${HOME}/.abuild"
+
+if ! compgen -G "${HOME}/.abuild/*.rsa" > /dev/null; then
+  abuild-keygen -a -n
+fi
+
+shopt -s nullglob
+merge_private_keys=("${HOME}"/.abuild/*.rsa)
+merge_public_keys=("${HOME}"/.abuild/*.rsa.pub)
+shopt -u nullglob
+
+if [[ "${#merge_private_keys[@]}" -ne 1 || "${#merge_public_keys[@]}" -ne 1 ]]; then
+  printf 'expected exactly one merge signing key in %s/.abuild\n' "${HOME}" >&2
+  exit 1
+fi
+
+for arch in ${arches}; do
+  destination="${package_root}/${arch}"
+  keys_dir="${keys_root}/${arch}"
+  mkdir -p "${destination}"
+
+  while IFS= read -r -d '' apk; do
+    cp "${apk}" "${destination}/"
+  done < <(find "${artifact_root}" -type f -path "*/${arch}/*.apk" -print0)
+
+  shopt -s nullglob
+  apks=("${destination}"/*.apk)
+  shopt -u nullglob
+  if [[ "${#apks[@]}" -eq 0 ]]; then
+    rmdir "${destination}"
+    continue
+  fi
+
+  while IFS= read -r -d '' key; do
+    copy_key "${key}" "${destination}"
+    mkdir -p "${keys_dir}"
+    copy_key "${key}" "${keys_dir}"
+  done < <(find "${artifact_root}" -type f -path "*/${arch}/*.rsa.pub" -print0)
+  if ! compgen -G "${keys_dir}/*.rsa.pub" > /dev/null; then
+    printf 'missing worker signing key for %s artifacts\n' "${arch}" >&2
+    exit 1
+  fi
+  copy_key "${merge_public_keys[0]}" "${destination}"
+
+  (
+    cd "${destination}"
+    apk --keys-dir "${keys_dir}" index --rewrite-arch "${arch}" -o APKINDEX.tar.gz ./*.apk
+    abuild-sign -k "${merge_private_keys[0]}" APKINDEX.tar.gz
+  )
+done
+
+if ! compgen -G "${package_root}"/*/*.apk > /dev/null; then
+  printf 'no APK files found in worker artifacts: %s\n' "${artifact_root}" >&2
+  exit 1
+fi