#!/bin/sh
set -e
[ "$(id | awk '{print $1}')" != 'uid=0(root)' ] &&
  exec sudo "$0" "$(id -u $(whoami))" "$@"
[ "z$1" = z ] && return 1
mirror=https://dl-cdn.alpinelinux.org/alpine/edge
arch="${ABCHR_ARCH:-x86_64}"
apk update
apk="apk-tools-static-$(apk info apk-tools-static |
  awk '{if (NR==1) {print substr($1,18)}}').apk"
dir="$(dirname "$0")/../alpine"
tmp="$(dirname "$0")/../tmp"
mkdir -p "$tmp"
wget -P "$tmp" "$mirror/main/$arch/$apk"
tar -xvzf "$tmp/$apk" -C "$tmp"
"$tmp/sbin/apk.static" -UX "$mirror/main" -X "$mirror/community" \
  --allow-untrusted -p "$dir" --initdb \
  add busybox busybox-suid libc-utils sudo \
      alpine-baselayout alpine-conf alpine-release apk-tools \
      alpine-sdk alpine-repo-tools atools lua-aports
rm -rf "$tmp"
cp -Ln /etc/apk/keys/* "$dir/etc/apk/keys"
cp -f /etc/apk/repositories "$dir/etc/apk/repositories"
printf -- > "$dir/etc/sudoers.d/abuild" 'abuild ALL=(ALL) NOPASSWD: ALL'
printf -- >> "$dir/etc/apk/repositories" \
  '/home/abuild/packages/%s\n' main community testing
chroot "$dir" /bin/sh -c "adduser -DGabuild -u$1 abuild"