Refactor container build and installation pipeline to use configurable Makefile parameters (e.g. DISTROS, base images) and propagate them through all build, install, and test scripts

scripts/installation/arch/aur-builder-setup.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ------------------------------------------------------------
+# aur-builder-setup.sh
+#
+# Setup helper for an 'aur_builder' user and yay on Arch-based
+# systems. Intended for host usage and can also be used in
+# containers if desired.
+# ------------------------------------------------------------
+
+echo "[aur-builder-setup] Checking for pacman..."
+if ! command -v pacman >/dev/null 2>&1; then
+  echo "[aur-builder-setup] pacman not found – this is not an Arch-based system. Skipping."
+  exit 0
+fi
+
+if [[ "${EUID:-0}" -ne 0 ]]; then
+  ROOT_CMD="sudo"
+else
+  ROOT_CMD=""
+fi
+
+echo "[aur-builder-setup] Installing base-devel, git, sudo..."
+${ROOT_CMD} pacman -Syu --noconfirm
+${ROOT_CMD} pacman -S --needed --noconfirm base-devel git sudo
+
+echo "[aur-builder-setup] Ensuring aur_builder group/user..."
+if ! getent group aur_builder >/dev/null 2>&1; then
+  ${ROOT_CMD} groupadd -r aur_builder
+fi
+
+if ! id -u aur_builder >/dev/null 2>&1; then
+  ${ROOT_CMD} useradd -m -r -g aur_builder -s /bin/bash aur_builder
+fi
+
+echo "[aur-builder-setup] Configuring sudoers for aur_builder..."
+${ROOT_CMD} bash -c "echo '%aur_builder ALL=(ALL) NOPASSWD: /usr/bin/pacman' > /etc/sudoers.d/aur_builder"
+${ROOT_CMD} chmod 0440 /etc/sudoers.d/aur_builder
+
+if command -v sudo >/dev/null 2>&1; then
+  RUN_AS_AUR=(sudo -u aur_builder bash -lc)
+else
+  RUN_AS_AUR=(su - aur_builder -c)
+fi
+
+echo "[aur-builder-setup] Ensuring yay is installed for aur_builder..."
+if ! "${RUN_AS_AUR[@]}" 'command -v yay >/dev/null 2>&1'; then
+  "${RUN_AS_AUR[@]}" 'cd ~ && rm -rf yay && git clone https://aur.archlinux.org/yay.git && cd yay && makepkg -si --noconfirm'
+else
+  echo "[aur-builder-setup] yay already installed."
+fi
+
+echo "[aur-builder-setup] Done."