#!/bin/bash
#
# Ceph distributed storage system
#
# Copyright (C) 2014 Red Hat <contact@redhat.com>
#
# Author: Loic Dachary <loic@dachary.org>
#
#  This library is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2.1 of the License, or (at your option) any later version.
#

#
# Return MAX(1, (number of processors / 2)) by default or NPROC
#
function get_processors() {
    if test -n "$NPROC" ; then
        echo $NPROC
    else
        if test $(nproc) -ge 2 ; then
            expr $(nproc) / 2
        else
            echo 1
        fi
    fi
}

function run() {
    local install_cmd
    local which_pkg="which"
    if test -f /etc/redhat-release ; then
        source /etc/os-release
        if ! type bc > /dev/null 2>&1 ; then
            echo "Please install bc and re-run." 
            exit 1
        fi
        if test "$(echo "$VERSION_ID >= 22" | bc)" -ne 0; then
            install_cmd="dnf -y install"
        else
            install_cmd="yum install -y"
        fi
    else
        which_pkg="debianutils"
    fi

    type apt-get > /dev/null 2>&1 && install_cmd="apt-get install -y"
    type zypper > /dev/null 2>&1 && install_cmd="zypper --gpg-auto-import-keys --non-interactive install"

    if ! type sudo > /dev/null 2>&1 ; then
        echo "Please install sudo and re-run. This script assumes it is running"
        echo "as a normal user with the ability to run commands as root via sudo." 
        exit 1
    fi
    if [ -n "$install_cmd" ]; then
        $DRY_RUN sudo $install_cmd ccache jq $which_pkg
    else
        echo "WARNING: Don't know how to install packages" >&2
    fi

    if test -f ./install-deps.sh ; then
	$DRY_RUN ./install-deps.sh || return 1
    fi

    # Init defaults after deps are installed. get_processors() depends on coreutils nproc.
    DEFAULT_MAKEOPTS=${DEFAULT_MAKEOPTS:--j$(get_processors)}
    BUILD_MAKEOPTS=${BUILD_MAKEOPTS:-$DEFAULT_MAKEOPTS}
    CHECK_MAKEOPTS=${CHECK_MAKEOPTS:-$DEFAULT_MAKEOPTS}

    $DRY_RUN ./do_cmake.sh $@ || return 1
    $DRY_RUN cd build
    $DRY_RUN make $BUILD_MAKEOPTS tests || return 1
    $DRY_RUN ctest $CHECK_MAKEOPTS --output-on-failure || return 1
}

function main() {
    if [[ $EUID -eq 0 ]] ; then
        echo "For best results, run this script as a normal user configured"
        echo "with the ability to run commands as root via sudo."
    fi
    echo -n "Checking hostname sanity... "
    if hostname --fqdn >/dev/null 2>&1 ; then
        echo "OK"
    else
        echo "NOT OK"
        echo "Please fix 'hostname --fqdn', otherwise 'make check' will fail"
        return 1
    fi
    if run "$@" ; then
        rm -fr ${CEPH_BUILD_VIRTUALENV:-/tmp}/*virtualenv*
        echo "cmake check: successful run on $(git rev-parse HEAD)"
        return 0
    else
        rm -fr ${CEPH_BUILD_VIRTUALENV:-/tmp}/*virtualenv*
        return 1
    fi
}

main "$@"