chore(packaging): add AUR package sources for source, git, and binary builds

packaging/aur/ now holds the full content of three AUR repositories:
proton-drive-for-linux builds the latest tag from source,
proton-drive-for-linux-git builds main, and proton-drive-for-linux-bin
installs the binaries attached to the GitHub release. Each carries a
PKGBUILD, a generated .SRCINFO, an ignore-everything .gitignore, and the
0BSD license the AUR expects for package sources.

update.sh bumps the release-based packages and regenerates the .SRCINFO
files; push.sh publishes each package to its AUR remote. The README now
points users at the AUR packages and keeps the in-tree PKGBUILD as the
development build.

packaging/aur/proton-drive-for-linux/.SRCINFO

@@ -0,0 +1,32 @@
+pkgbase = proton-drive-for-linux
+	pkgdesc = Unofficial Proton Drive client: files-on-demand FUSE mount, CLI, GTK4 app and tray
+	pkgver = 1.11.1
+	pkgrel = 1
+	url = https://github.com/narrrl/proton-drive-linux
+	arch = x86_64
+	license = MIT
+	makedepends = cargo
+	depends = fuse3
+	depends = gtk4
+	depends = libadwaita
+	depends = webkitgtk-6.0
+	depends = dbus
+	depends = gcc-libs
+	depends = glibc
+	depends = hicolor-icon-theme
+	optdepends = perl-image-exiftool: thumbnails for camera RAW files
+	optdepends = gnome-keyring: credential storage over the Secret Service API
+	optdepends = kwallet: credential storage over the Secret Service API
+	optdepends = xdg-utils: "Open folder" action in the tray menu
+	optdepends = fzf: search-as-you-type launcher (pdfs-prompt --fzf)
+	optdepends = foot: terminal that hosts pdfs-prompt --fzf when started from a keybinding
+	provides = proton-drive-linux=1.11.1
+	provides = pdfs
+	conflicts = proton-drive-linux
+	conflicts = proton-drive-for-linux-bin
+	conflicts = proton-drive-for-linux-git
+	options = !lto
+	source = proton-drive-for-linux-1.11.1.tar.gz::https://github.com/narrrl/proton-drive-linux/archive/refs/tags/v1.11.1.tar.gz
+	sha256sums = 1481379b2b70102ea6345a00b1092f73511f6ba99d6fba9a3f185ad6d28caaf2
+
+pkgname = proton-drive-for-linux

packaging/aur/proton-drive-for-linux/.gitignore

@@ -0,0 +1,7 @@
+# Keep the AUR repository to the sources only: ignore everything, then
+# force-add the tracked files with `git add -f`.
+*
+!.gitignore
+!.SRCINFO
+!LICENSE
+!PKGBUILD

packaging/aur/proton-drive-for-linux/LICENSE

@@ -0,0 +1,12 @@
+Copyright (C) 2026 Nils Pukropp <contact@narl.io>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.

packaging/aur/proton-drive-for-linux/PKGBUILD

@@ -0,0 +1,73 @@
+# Maintainer: Nils Pukropp <contact@narl.io>
+
+pkgname=proton-drive-for-linux
+pkgver=1.11.1
+pkgrel=1
+pkgdesc="Unofficial Proton Drive client: files-on-demand FUSE mount, CLI, GTK4 app and tray"
+arch=('x86_64')
+url="https://github.com/narrrl/proton-drive-linux"
+license=('MIT')
+depends=('fuse3' 'gtk4' 'libadwaita' 'webkitgtk-6.0' 'dbus' 'gcc-libs' 'glibc'
+         'hicolor-icon-theme')
+makedepends=('cargo')
+optdepends=('perl-image-exiftool: thumbnails for camera RAW files'
+            'gnome-keyring: credential storage over the Secret Service API'
+            'kwallet: credential storage over the Secret Service API'
+            'xdg-utils: "Open folder" action in the tray menu'
+            'fzf: search-as-you-type launcher (pdfs-prompt --fzf)'
+            'foot: terminal that hosts pdfs-prompt --fzf when started from a keybinding')
+provides=("proton-drive-linux=$pkgver" 'pdfs')
+conflicts=('proton-drive-linux' 'proton-drive-for-linux-bin' 'proton-drive-for-linux-git')
+# LTO has broken GTK/Rust links for this workspace; the release profile keeps it off.
+options=('!lto')
+source=("$pkgname-$pkgver.tar.gz::$url/archive/refs/tags/v$pkgver.tar.gz")
+sha256sums=('1481379b2b70102ea6345a00b1092f73511f6ba99d6fba9a3f185ad6d28caaf2')
+
+_srcname="proton-drive-linux-$pkgver"
+
+prepare() {
+  cd "$_srcname"
+  export RUSTUP_TOOLCHAIN=stable
+  cargo fetch --locked --target "$(rustc -vV | sed -n 's/host: //p')"
+}
+
+build() {
+  cd "$_srcname"
+  export RUSTUP_TOOLCHAIN=stable
+  export CARGO_TARGET_DIR=target
+  cargo build --frozen --release \
+    --bin pdfs \
+    --bin pdfs-tray \
+    --bin pdfs-app \
+    --bin pdfs-prompt
+}
+
+check() {
+  cd "$_srcname"
+  export RUSTUP_TOOLCHAIN=stable
+  export CARGO_TARGET_DIR=target
+  cargo test --frozen --workspace
+}
+
+package() {
+  cd "$_srcname"
+
+  install -Dm755 target/release/pdfs        "$pkgdir/usr/bin/pdfs"
+  install -Dm755 target/release/pdfs-tray   "$pkgdir/usr/bin/pdfs-tray"
+  install -Dm755 target/release/pdfs-app    "$pkgdir/usr/bin/pdfs-app"
+  install -Dm755 target/release/pdfs-prompt "$pkgdir/usr/bin/pdfs-prompt"
+
+  install -Dm644 packaging/io.narl.proton-drive-linux.desktop \
+    "$pkgdir/usr/share/applications/io.narl.proton-drive-linux.desktop"
+  install -Dm644 packaging/io.narl.proton-drive-linux-tray.desktop \
+    "$pkgdir/etc/xdg/autostart/io.narl.proton-drive-linux-tray.desktop"
+  install -Dm644 packaging/io.narl.proton-drive-linux.svg \
+    "$pkgdir/usr/share/icons/hicolor/scalable/apps/io.narl.proton-drive-linux.svg"
+
+  # systemd user unit for the auto-mount daemon; enabled per user, not by pacman.
+  install -Dm644 packaging/proton-drive.service \
+    "$pkgdir/usr/lib/systemd/user/proton-drive.service"
+
+  install -Dm644 LICENSE "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
+  install -Dm644 README.md "$pkgdir/usr/share/doc/$pkgname/README.md"
+}