#
# sudo apt install pbuilder fakeroot debhelper debian-archive-keyring debian-keyring
#
# ubuntu:
# prepare old (trusty or earlier) host system:

# sudo ln -s gutsy /usr/share/debootstrap/scripts/eoan
# sudo ln -s gutsy /usr/share/debootstrap/scripts/disco
# sudo ln -s gutsy /usr/share/debootstrap/scripts/cosmic
# sudo ln -s gutsy /usr/share/debootstrap/scripts/artful
# sudo ln -s gutsy /usr/share/debootstrap/scripts/bionic
# sudo ln -s sid /usr/share/debootstrap/scripts/buster
# build ubuntu:
# sudo DIST=bionic pbuilder create --configfile debian/.pbuilderrc && DIST=bionic pdebuild --configfile debian/.pbuilderrc
# sudo DIST=cosmic pbuilder create --configfile debian/.pbuilderrc && DIST=cosmic pdebuild --configfile debian/.pbuilderrc
# sudo DIST=disco  pbuilder create --configfile debian/.pbuilderrc && DIST=disco  pdebuild --configfile debian/.pbuilderrc
# sudo DIST=eoan   pbuilder create --configfile debian/.pbuilderrc && DIST=eoan   pdebuild --configfile debian/.pbuilderrc
# sudo DIST=devel  pbuilder create --configfile debian/.pbuilderrc && DIST=devel  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=xenial       ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=xenial       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=bionic       ARCH=i386 pbuilder create --configfile debian/.pbuilderrc && DIST=bionic       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
# test gcc-9
# env DEB_CC=gcc-9 DEB_CXX=g++-9 EXTRAPACKAGES="g++-9 gcc-9" DIST=disco pdebuild --configfile debian/.pbuilderrc
# use only clang:
# env DEB_CC=clang-8 DEB_CXX=clang++-8 EXTRAPACKAGES=clang-8 DIST=disco pdebuild --configfile debian/.pbuilderrc
# env DEB_CC=clang-5.0 DEB_CXX=clang++-5.0 EXTRAPACKAGES=clang-5.0 DIST=artful pdebuild --configfile debian/.pbuilderrc
# clang+asan:
# env DEB_CC=clang-5.0 DEB_CXX=clang++-5.0 EXTRAPACKAGES="clang-5.0 libc++abi-dev libc++-dev" CMAKE_FLAGS="-DENABLE_TCMALLOC=0 -DENABLE_UNWIND=0 -DCMAKE_BUILD_TYPE=Asan" DIST=artful pdebuild --configfile debian/.pbuilderrc
# clang+tsan:
# env DEB_CC=clang-5.0 DEB_CXX=clang++-5.0 EXTRAPACKAGES="clang-5.0 libc++abi-dev libc++-dev" CMAKE_FLAGS="-DCMAKE_BUILD_TYPE=Tsan" DIST=artful pdebuild --configfile debian/.pbuilderrc
# without sse for old systems and some VM:
# env DH_VERBOSE=1 CMAKE_FLAGS="-DHAVE_SSE41=0 -DHAVE_SSE42=0 -DHAVE_POPCNT=0 -DHAVE_SSE2_INTRIN=0 -DSSE2FLAG=' ' -DHAVE_SSE42_INTRIN=0 -DSSE4FLAG=' ' -DHAVE_PCLMULQDQ_INTRIN=0 -DPCLMULFLAG=' '" DIST=artful pdebuild --configfile debian/.pbuilderrc

# Note: on trusty host creating some future dists can fail (debootstrap error).

# Your packages built here: /var/cache/pbuilder/*-*/result

# 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=("eoan" "disco" "cosmic" "bionic" "artful" "zesty" "xenial" "trusty" "devel")

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

# 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=${SET_BASETGZ}
BASETGZ=${BASETGZ:="/var/cache/pbuilder/$NAME-base.tgz"}
DISTRIBUTION="$DIST"
BUILDRESULT=${SET_BUILDRESULT}
BUILDRESULT=${BUILDRESULT:="/var/cache/pbuilder/$NAME/result/"}
APTCACHE="/var/cache/pbuilder/$NAME/aptcache/"
BUILDPLACE="/var/cache/pbuilder/build/"
ALLOWUNTRUSTED=${SET_ALLOWUNTRUSTED:=${ALLOWUNTRUSTED}}

#DEBOOTSTRAPOPTS=( '--variant=buildd' $SET_DEBOOTSTRAPOPTS )


if $(echo ${DEBIAN_SUITES[@]} | grep -q $DIST); then
    # Debian configuration
    OSNAME=debian
    MIRRORSITE=${SET_MIRRORSITE="http://deb.debian.org/$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

    case "$HOST_DIST" in
       "trusty" )
            DEBOOTSTRAPOPTS+=( '--no-check-gpg' )
        ;;
        *)
            DEBOOTSTRAPOPTS+=( '--keyring' '/usr/share/keyrings/debian-archive-keyring.gpg' )
            # DEBOOTSTRAPOPTS+=( '--keyring' '/usr/share/keyrings/debian-keyring.gpg' )
    esac
elif $(echo ${UBUNTU_SUITES[@]} | grep -q $DIST); then
    # Ubuntu configuration
    OSNAME=ubuntu

    if [[ "$ARCH" == "amd64" || "$ARCH" == "i386" ]]; then
        MIRRORSITE=${SET_MIRRORSITE="http://archive.ubuntu.com/$OSNAME/"}
    else
        MIRRORSITE=${SET_MIRRORSITE="http://ports.ubuntu.com/ubuntu-ports/"}
    fi

    COMPONENTS="main restricted universe multiverse"

    OTHERMIRROR="$OTHERMIRROR | deb $MIRRORSITE $DIST-updates main restricted universe multiverse"
    OTHERMIRROR="$OTHERMIRROR | deb $MIRRORSITE $DIST-security main restricted universe multiverse"
    OTHERMIRROR="$OTHERMIRROR | deb $MIRRORSITE $DIST-proposed main restricted universe multiverse"

    case "$DIST" in
       "trusty" | "xenial" )
           OTHERMIRROR="$OTHERMIRROR | deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/$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 $MIRRORSITE"

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

# old systems with default gcc <= 6
case "$DIST" in
    "trusty" | "xenial" | "stable" )
        export DEB_CC=gcc-7
        export DEB_CXX=g++-7
        ;;
esac

if [ "$ARCH" != arm64 ]; then
    case "$DIST" in
# TODO: fix llvm-8 and use for "disco" and "eoan"
    "experimental")
        EXTRAPACKAGES+=" liblld-8-dev libclang-8-dev llvm-8-dev liblld-8 "
        export CMAKE_FLAGS="-DLLVM_VERSION=8 $CMAKE_FLAGS"
        ;;
    "eoan" | "disco" | "cosmic" | "testing" | "unstable")
        EXTRAPACKAGES+=" liblld-7-dev libclang-7-dev llvm-7-dev liblld-7 "
        export CMAKE_FLAGS="-DLLVM_VERSION=7 $CMAKE_FLAGS"
        ;;
    "bionic")
        EXTRAPACKAGES+=" liblld-6.0-dev libclang-6.0-dev liblld-6.0 "
        export CMAKE_FLAGS="-DLLVM_VERSION=6 $CMAKE_FLAGS"
        ;;
    "artful" )
        EXTRAPACKAGES+=" liblld-5.0-dev libclang-5.0-dev liblld-5.0 "
        ;;
    esac
else
    export CMAKE_FLAGS="-DENABLE_EMBEDDED_COMPILER=0 $CMAKE_FLAGS"
fi

# Will test symbols
#EXTRAPACKAGES+=" gdb "

# For killall in pbuilder-hooks:
EXTRAPACKAGES+=" psmisc "

[[ $CCACHE_PREFIX == 'distcc' ]] && EXTRAPACKAGES+=" $CCACHE_PREFIX " && USENETWORK=yes && export DISTCC_DIR=/var/cache/pbuilder/distcc

[[ $ARCH == 'i386' ]] && EXTRAPACKAGES+=" libssl-dev "

export DEB_BUILD_OPTIONS=parallel=`nproc`

# Floating bug with permissions:
[ -n "$CCACHEDIR" ] && sudo mkdir -p $CCACHEDIR
[ -n "$CCACHEDIR" ] && sudo chmod -R a+rwx $CCACHEDIR || true
# chown -R $BUILDUSERID:$BUILDUSERID $CCACHEDIR


# Do not create source package inside pbuilder (-b)
# Use current dir to make package (by default should have src archive)
# echo "3.0 (native)" > debian/source/format
# OR
# pdebuild -b --debbuildopts "--source-option=--format=\"3.0 (native)\""
# OR
DEBBUILDOPTS="-b --source-option=--format=\"3.0 (native)\""

HOOKDIR="debian/pbuilder-hooks"

#echo "DEBOOTSTRAPOPTS=${DEBOOTSTRAPOPTS[@]}"
#echo "ALLOWUNTRUSTED=${ALLOWUNTRUSTED} OTHERMIRROR=${OTHERMIRROR}"
#echo "EXTRAPACKAGES=${EXTRAPACKAGES}"