Add Gitea Alpine registry workflow

scripts/apk/ci-build.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+package_dir="${APKBUILD_DIR:-${repo_root}/packaging/alpine/local/seaweedfs}"
+repo_name="${ALPINE_REPO_NAME:-local}"
+arches="${ALPINE_ARCHES:-x86_64 aarch64}"
+packager="${PACKAGER:-Joachim Schlöffel <me@joachim-schloeffel.com>}"
+
+if [[ "${1:-}" != "--as-builder" && "$(id -u)" == "0" ]]; then
+  addgroup -g 1000 builder 2>/dev/null || addgroup builder
+  adduser -D -u 1000 -G builder builder 2>/dev/null || true
+  addgroup builder abuild
+  addgroup builder wheel
+  printf 'permit nopass :wheel\n' > /etc/doas.d/wheel.conf
+  printf '%%wheel ALL=(ALL) NOPASSWD: ALL\n' > /etc/sudoers.d/wheel
+  chown -R builder:builder "${repo_root}"
+  exec su builder -c "ALPINE_ARCHES='${arches}' ALPINE_REPO_NAME='${repo_name}' PACKAGER='${packager}' '${BASH_SOURCE[0]}' --as-builder"
+fi
+
+export PACKAGER="${packager}"
+export REPODEST="${repo_root}/packages"
+export SRCDEST="${repo_root}/.cache/apk-distfiles"
+
+git config --global --add safe.directory "${repo_root}"
+mkdir -p "${repo_root}/.cache/abuild" "${SRCDEST}" "${REPODEST}" "${HOME}/.abuild"
+
+if [[ ! -e "${HOME}/.abuild/abuild.conf" && -d "${repo_root}/.cache/abuild" ]]; then
+  rmdir "${HOME}/.abuild" 2>/dev/null || true
+  ln -s "${repo_root}/.cache/abuild" "${HOME}/.abuild"
+fi
+
+if ! compgen -G "${HOME}/.abuild/*.rsa" > /dev/null; then
+  abuild-keygen -a -n
+fi
+
+doas cp "${HOME}"/.abuild/*.rsa.pub /etc/apk/keys/
+
+for arch in ${arches}; do
+  case "${arch}" in
+    x86_64|aarch64) ;;
+    *) printf 'unsupported Alpine architecture: %s\n' "${arch}" >&2; exit 2 ;;
+  esac
+
+  printf 'Building %s for %s\n' "$(basename "${package_dir}")" "${arch}"
+  (
+    export ALPINE_ARCH="${arch}"
+    export CARCH="${arch}"
+    cd "${package_dir}"
+    abuild -r
+  )
+
+  mkdir -p "${REPODEST}/${repo_name}/${arch}"
+  cp "${HOME}"/.abuild/*.rsa.pub "${REPODEST}/${repo_name}/${arch}/"
+done