chore(aur): added aur packaging

packaging/aur/Dockerfile

@@ -0,0 +1,26 @@
+FROM archlinux:base-devel
+
+# makepkg cannot (and should not) be run as root:
+RUN useradd -m build && \
+    pacman -Syu --noconfirm && \
+    pacman -Sy --noconfirm git && \
+    # Allow build to run stuff as root (to install dependencies):
+    echo "build ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/build
+
+# Continue execution (and CMD) as build:
+USER build
+WORKDIR /home/build
+
+# Auto-fetch GPG keys (for checking signatures):
+RUN mkdir .gnupg && \
+    touch .gnupg/gpg.conf && \
+    echo "keyserver-options auto-key-retrieve" > .gnupg/gpg.conf && \
+    git clone https://aur.archlinux.org/paru-bin.git && \
+    cd paru-bin && \
+    makepkg --noconfirm --syncdeps --rmdeps --install --clean
+
+COPY run.sh /run.sh
+
+# Build the package
+WORKDIR /pkg
+CMD ["/bin/bash", "/run.sh"]

packaging/aur/run.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+# Make a copy so we never alter the original
+cp -r /pkg /tmp/pkg
+cd /tmp/pkg
+
+# Sync database
+if [ -n "$SYNC_DATABASE" ]; then
+    paru -S --refresh
+fi
+
+# Do the actual building. Paru will fetch all dependencies for us (including
+# AUR dependencies) and then build the package.
+paru -U --noconfirm
+
+# Store the built package(s). Ensure permissions match the original PKGBUILD.
+if [ -n "$EXPORT_PKG" ]; then
+    sudo chown "$(stat -c '%u:%g' /pkg/PKGBUILD)" ./*pkg.tar*
+    sudo mv ./*pkg.tar* /pkg
+fi
+# Export .SRCINFO for built package
+if [ -n "$EXPORT_SRC" ]; then
+    makepkg --printsrcinfo > .SRCINFO
+    sudo chown "$(stat -c '%u:%g' /pkg/PKGBUILD)" ./.SRCINFO
+    sudo mv ./.SRCINFO /pkg
+fi