Add package-first build and distribution workflow

packaging/arch/PKGBUILD.in

@@ -0,0 +1,33 @@
+# Maintainer: Aman Maintainers <maintainers@example.com>
+pkgname=aman
+pkgver=__VERSION__
+pkgrel=1
+pkgdesc="Local amanuensis daemon for X11 desktops"
+arch=('x86_64')
+url="https://github.com/example/aman"
+license=('MIT')
+depends=('python' 'python-pip' 'python-setuptools' 'portaudio' 'gtk3' 'libayatana-appindicator' 'python-gobject' 'python-xlib')
+makedepends=('python-build' 'python-installer' 'python-wheel')
+source=("__TARBALL_NAME__")
+sha256sums=('__TARBALL_SHA256__')
+
+prepare() {
+  cd "${srcdir}/aman-${pkgver}"
+  python -m build --wheel
+}
+
+package() {
+  cd "${srcdir}/aman-${pkgver}"
+  install -dm755 "${pkgdir}/opt/aman"
+  python -m venv --system-site-packages "${pkgdir}/opt/aman/venv"
+  "${pkgdir}/opt/aman/venv/bin/python" -m pip install --upgrade pip
+  "${pkgdir}/opt/aman/venv/bin/python" -m pip install "dist/aman-${pkgver}-"*.whl
+
+  install -Dm755 /dev/stdin "${pkgdir}/usr/bin/aman" <<'EOF'
+#!/usr/bin/env bash
+set -euo pipefail
+exec /opt/aman/venv/bin/aman "$@"
+EOF
+
+  install -Dm644 "systemd/aman.service" "${pkgdir}/usr/lib/systemd/user/aman.service"
+}