with-builder-user

#!/bin/bash

set -e
cd "$(dirname "$0")"

if [ "$EUID" -ne 0 ]; then
  echo "Please run as root!"
  exit 1
fi

if [ -z "$BUILDER_UID" ] || [ -z "$BUILDER_GID" ]; then
  echo "Please make sure that BUILDER_UID and BUILDER_GID are set!"
  exit 1
fi

if [ $(getent group "$BUILDER_GID") ]; then
  echo "==> Warning: Group with GID $BUILDER_GID already exists, the existing group will be used"
else
  echo "==> Setting up builder group (GID: $BUILDER_GID)"
  groupadd -g "$BUILDER_GID" builder
fi

echo "==> Setting up builder user (UID: $BUILDER_UID)"
useradd -m -u "$BUILDER_UID" -g "$BUILDER_GID" builder

echo "==> Installing system dependencies"
pacman -Syu --noconfirm --needed base-devel git sudo pacman-contrib

echo "==> Setting up sudoers"
for user in root builder; do
  echo "$user ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
done

echo "==> Running '$@' under builder user (current architecture: $(uname -m))"
sudo -u builder "$@"