# ubuntu:
# prepare:
# ln -s gutsy /usr/share/debootstrap/scripts/artful
# echo "3.0 (native)" > debian/source/format
# build ubuntu:
# sudo DIST=trusty pbuilder create --configfile debian/.pbuilderrc && DIST=trusty pdebuild --configfile debian/.pbuilderrc
# sudo DIST=zesty  pbuilder create --configfile debian/.pbuilderrc && DIST=zesty  pdebuild --configfile debian/.pbuilderrc
# sudo DIST=artful pbuilder create --configfile debian/.pbuilderrc && DIST=artful pdebuild --configfile debian/.pbuilderrc
# build debian:
# sudo DIST=stable       pbuilder create --configfile debian/.pbuilderrc && DIST=stable       pdebuild --configfile debian/.pbuilderrc
# sudo DIST=testing      pbuilder create --configfile debian/.pbuilderrc && DIST=testing      pdebuild --configfile debian/.pbuilderrc
# sudo DIST=unstable     pbuilder create --configfile debian/.pbuilderrc && DIST=unstable     pdebuild --configfile debian/.pbuilderrc
# sudo DIST=experimental pbuilder create --configfile debian/.pbuilderrc && DIST=experimental pdebuild --configfile debian/.pbuilderrc
# build i386 experimental:
# sudo DIST=trusty       ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=trusty       ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# sudo DIST=zesty        ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=zesty        ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# sudo DIST=artful       ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=artful       ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# sudo DIST=stable       ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=stable       ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# sudo DIST=testing      ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=testing      ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# sudo DIST=experimental ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=experimental ARCH=i386 pdebuild --configfile debian/.pbuilderrc
# BROKEN (can't install fresh gcc):
# sudo DIST=xenial pbuilder create --configfile debian/.pbuilderrc && DIST=xenial pdebuild --configfile debian/.pbuilderrc
# TODO:

# from https://wiki.debian.org/PbuilderTricks :

# Codenames for Debian suites according to their alias. Update these when
# needed.
UNSTABLE_CODENAME="sid"
TESTING_CODENAME="buster"
STABLE_CODENAME="stretch"
STABLE_BACKPORTS_SUITE="$STABLE_CODENAME-backports"

# List of Debian suites.
DEBIAN_SUITES=($UNSTABLE_CODENAME $TESTING_CODENAME $STABLE_CODENAME $STABLE_BACKPORTS_SUITE
    "experimental" "unstable" "testing" "stable")

# List of Ubuntu suites. Update these when needed.
UBUNTU_SUITES=("artful" "zesty" "xenial" "trusty")

# Mirrors to use. Update these to your preferred mirror.
DEBIAN_MIRROR="deb.debian.org"
#UBUNTU_MIRROR="mirrors.kernel.org"

UBUNTU_MIRROR="mirror.yandex.ru"
#DEBIAN_MIRROR="mirror.yandex.ru"

# Optionally use the changelog of a package to determine the suite to use if
# none set.
if [ -z "${DIST}" ] && [ -r "debian/changelog" ]; then
    DIST=$(dpkg-parsechangelog --show-field=Distribution)
fi

# Optionally set a default distribution if none is used. Note that you can set
# your own default (i.e. ${DIST:="unstable"}).
: ${DIST:="$(lsb_release --short --codename)"}

# Optionally change Debian codenames in $DIST to their aliases.
case "$DIST" in
    $UNSTABLE_CODENAME)
        DIST="unstable"
        ;;
    $TESTING_CODENAME)
        DIST="testing"
        ;;
    $STABLE_CODENAME)
        DIST="stable"
        ;;
esac

# Optionally set the architecture to the host architecture if none set. Note
# that you can set your own default (i.e. ${ARCH:="i386"}).
: ${ARCH:="$(dpkg --print-architecture)"}

NAME="$DIST"
if [ -n "${ARCH}" ]; then
    NAME="$NAME-$ARCH"
    DEBOOTSTRAPOPTS=("--arch" "$ARCH" "${DEBOOTSTRAPOPTS[@]}")
fi

BASETGZ="/var/cache/pbuilder/$NAME-base.tgz"
DISTRIBUTION="$DIST"
BUILDRESULT="/var/cache/pbuilder/$NAME/result/"
APTCACHE="/var/cache/pbuilder/$NAME/aptcache/"
BUILDPLACE="/var/cache/pbuilder/build/"

if $(echo ${DEBIAN_SUITES[@]} | grep -q $DIST); then
    # Debian configuration
    OSNAME=debian
    MIRRORSITE="http://$DEBIAN_MIRROR/$OSNAME/"
    COMPONENTS="main contrib non-free"
    if $(echo "$STABLE_CODENAME stable" | grep -q $DIST); then
        OTHERMIRROR="$OTHERMIRROR | deb $MIRRORSITE $STABLE_BACKPORTS_SUITE $COMPONENTS"
    fi
    # APTKEYRINGS=/usr/share/keyrings/debian-archive-keyring.gpg
    # sudo apt install debian-archive-keyring
    DEBOOTSTRAPOPTS+=( '--keyring' '/usr/share/keyrings/debian-archive-keyring.gpg' )
elif $(echo ${UBUNTU_SUITES[@]} | grep -q $DIST); then
    # Ubuntu configuration
    OSNAME=ubuntu
    MIRRORSITE="http://$UBUNTU_MIRROR/$OSNAME/"
    COMPONENTS="main restricted universe multiverse"

    case "$DIST" in
       "trusty" | "xenial" )
           OTHERMIRROR+="deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/$OSNAME $DIST main"
           #OTHERMIRROR+="deb http://ppa.launchpad.net/ubuntu-toolchain-r/ppa/$OSNAME $DIST main"
           ALLOWUNTRUSTED=yes
           ;;
    esac

    # deb http://apt.llvm.org/zesty/ llvm-toolchain-zesty-5.0 main
else
    echo "Unknown distribution: $DIST"
    exit 1
fi

echo "using $NAME $OSNAME $DIST $ARCH $LOGNAME"

case "$DIST" in
    "trusty")
        # ccache broken
        ;;
    *)
        CCACHEDIR=/var/cache/pbuilder/ccache
        ;;
esac

case "$DIST" in
    "trusty" | "artful" | "experimental" | "unstable" )
        export DEB_CC=gcc-7
        export DEB_CXX=g++-7
        ;;
esac

export CCACHE_PREFIX=

export DEB_BUILD_OPTIONS=parallel=`nproc`

# Floating bug with permissions:
sudo mkdir -p /var/cache/pbuilder/ccache
sudo chmod -R a+rwx /var/cache/pbuilder/ccache

# echo "DEBOOTSTRAPOPTS = ${DEBOOTSTRAPOPTS[@]}"