#!/bin/sh
# vim: set ts=4 sw=4 sts=4 et :

### prepare-chroot-builder : Create the build chroot instance of Alpine Linux
### (in which to build Qubes packages)
echo "--> Alpine Linux prepare-chroot-builder"

PLUGIN_DIR="$(dirname $0)"
INSTALLDIR="$1"
DISTRO="$2"

SCRIPTSDIR=${ALPINELINUX_PLUGIN_DIR}scripts
export INSTALLDIR SCRIPTSDIR

# do not make volatile private key dir for the package builds themselves
# this is interpreted by scripts/alpine-chroot
SKIP_VOLATILE_SECRET_KEY_DIR=true
export SKIP_VOLATILE_SECRET_KEY_DIR

set -e
[ "$VERBOSE" -ge 1 -o "$DEBUG" -gt 0 ] && echo "  --> INSTALLDIR: '$INSTALLDIR'"
[ "$VERBOSE" -ge 2 -o "$DEBUG" -gt 0 ] && set -x

# /home/user will exist if we've completed the build previously
if ! [ -d "${INSTALLDIR}/home/user" ]; then
    # It's non-existance means this is likely the initial run, so build it

    mkdir -p "$INSTALLDIR"

    echo "  --> Installing alpine linux build root:"
    "${PLUGIN_DIR}/prepare-chroot-base" "$INSTALLDIR" "$DISTRO"

    echo "  --> Configure system accounts..."
    [ -n "$SUDO_UID" ] && USER_OPTS="-u ${SUDO_UID}"
    [ -n "$USER_UID" ] && USER_OPTS="-u ${USER_UID}"
    if [ -n "$USER_GID" ]; then
        chroot "$INSTALLDIR" /bin/addgroup -g "$USER_GID" user
    elif [ -n "$SUDO_GID" ]; then
        chroot "$INSTALLDIR" /bin/addgroup -g "$SUDO_GID" user
    else
        chroot "$INSTALLDIR" /bin/addgroup user
    fi
    chroot "$INSTALLDIR" /bin/sh -c \
        "useradd -g user -G wheel $USER_OPTS -m user; su -c 'mkdir qubes-src' - user"

    echo "  --> Synchronize resolv.conf..."
    cp /etc/resolv.conf "${INSTALLDIR}/etc/resolv.conf"

    echo "  --> Installing required makepkg dependencies..."
    pkgs="alpine-sdk"
    "${SCRIPTSDIR}/alpine-chroot" "$INSTALLDIR" /bin/sh -c \
        "apk add $pkgs"

    # makepkg internally calls sudo without '-E', so we need to add an
    # env_keep to honor proxy settings
    echo "  --> Configure sudo..."
    cat > "${INSTALLDIR}/etc/sudoers.d/qubes-build-user" <<EOF
Defaults env_keep += "http_proxy https_proxy ftp_proxy"
%wheel ALL=(ALL) NOPASSWD: ALL
EOF

    # Register custom repository (it will be created later)
    echo "file:///tmp/qubes-packages-mirror-repo/pkgs" | tee -a "${INSTALLDIR}/etc/apk/repositories" 
fi