Group A: source upstream binaries instead of self-built artifacts

The AUR does not allow packages to ship a binary tarball built by the
maintainer - a -bin package must repackage a deliverable published by
upstream. These six packages now do that:

  snapx-bin            upstream's self-contained Linux tar.zst
  zapzap-bin           upstream's pure-Python wheel
  faugus-launcher-bin  upstream's arch-independent .deb
  wiiudownloader-bin   upstream's AppImage
  waydroid-helper-bin  upstream's AppImage
  chiaki-ng-bin        upstream's AppImage

All six drop build_artifact() and switch to refresh_checksums(), so CI no
longer builds or hosts anything - it only tracks upstream's assets.

Where the asset name carries build metadata that does not follow from
pkgver (snapx, faugus-launcher), refresh_checksums() resolves it via the
GitHub API and syncs an _asset variable in the PKGBUILD.

Dependency lists are re-derived from what the bundles actually resolve
outside themselves; the AppImage payloads land in /opt with wrappers in
/usr/bin, because their entry points resolve paths relative to argv[0].

faugus-launcher-bin/PKGBUILD

@@ -4,8 +4,8 @@
 
 pkgname=faugus-launcher-bin
 pkgver=2.0.2
-pkgrel=1
-pkgdesc="Simple and lightweight app for running Windows games using UMU-Launcher (prebuilt)"
+pkgrel=2
+pkgdesc="Simple and lightweight app for running Windows games using UMU-Launcher (upstream binary)"
 arch=('any')
 url="https://github.com/Faugus/faugus-launcher"
 license=('MIT')
@@ -16,9 +16,51 @@ optdepends=('mangohud: performance overlay'
             'gamemode: feral gamemode integration')
 provides=('faugus-launcher')
 conflicts=('faugus-launcher')
-source=("${pkgname}-${pkgver}-${pkgrel}.tar.zst::https://github.com/Felitendo/PKGBUILDS/releases/download/${pkgname}-${pkgver}/${pkgname}-${pkgver}.tar.zst")
-sha256sums=('5fcf441cccb1ccc0ac554760e93744d557fd05a3fc4335132a59e55aefe902af')
+# The Debian revision in the asset name does not follow from pkgver, so the
+# exact name is tracked here and refreshed automatically.
+_asset="faugus-launcher_2.0.2-1_all.deb"
+source=("${pkgname}-${pkgver}.deb::${url}/releases/download/${pkgver}/${_asset}")
+noextract=("${pkgname}-${pkgver}.deb")
+sha256sums=('c694d85af50cdc5fc6fbd50453075b799d5a458cc0bd123abe31aafde8cdc6fa')
 
 package() {
-  cp -a "$srcdir/usr" "$pkgdir/"
+  local _deb="$srcdir/deb"
+
+  install -d "$_deb"
+  bsdtar -xOf "$srcdir/${pkgname}-${pkgver}.deb" 'data.tar.*' \
+    | bsdtar -xpf - -C "$_deb" ./usr
+
+  # Debian puts the modules in dist-packages, which is not on Arch's
+  # sys.path. A fixed private directory also keeps the package working
+  # across Python minor bumps, since it is only rebuilt for new releases.
+  install -d "$pkgdir/usr/lib/faugus-launcher"
+  cp -a "$_deb/usr/lib/python3/dist-packages/faugus" "$pkgdir/usr/lib/faugus-launcher/"
+  # .pyc compiled for Debian's Python, useless here
+  find "$pkgdir/usr/lib/faugus-launcher" -type d -name __pycache__ -exec rm -rf {} +
+
+  cp -a "$_deb/usr/share" "$pkgdir/usr/"
+  # generated by pacman hooks; shipping them would cause file conflicts
+  rm -f "$pkgdir/usr/share/applications/mimeinfo.cache" \
+        "$pkgdir/usr/share/icons/hicolor/icon-theme.cache"
+
+  # upstream's wrapper relies on Debian's default sys.path, ours points at
+  # the directory above; the rest matches upstream verbatim
+  install -d "$pkgdir/usr/bin"
+  cat > "$pkgdir/usr/bin/faugus-launcher" << 'EOF'
+#!/bin/sh
+
+export PYTHONPATH="/usr/lib/faugus-launcher${PYTHONPATH:+:$PYTHONPATH}"
+export GTK_IM_MODULE="${GTK_IM_MODULE:-simple}"
+
+case "$1" in
+	--shortcut) exec /usr/bin/python3 -m faugus.shortcut "$2";;
+	--game)     exec /usr/bin/python3 -m faugus.runner --game "$2";;
+	--run)      msg="$2"; shift 2; exec /usr/bin/python3 -m faugus.runner "$msg" "$@";;
+	*)          exec /usr/bin/python3 -m faugus.launcher "$@";;
+esac
+EOF
+  chmod 755 "$pkgdir/usr/bin/faugus-launcher"
+
+  mv "$pkgdir/usr/share/licenses/faugus-launcher" \
+     "$pkgdir/usr/share/licenses/$pkgname"
 }