#!/bin/bash -e
#
# Ceph distributed storage system
#
# Copyright (C) 2014, 2015 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.
#
DIR=/tmp/install-deps.$$
trap "rm -fr $DIR" EXIT
mkdir -p $DIR
if test $(id -u) != 0 ; then
    SUDO=sudo
fi
export LC_ALL=C # the following is vulnerable to i18n

if test -f /etc/redhat-release ; then
    $SUDO yum install -y redhat-lsb-core
fi

if type apt-get > /dev/null 2>&1 ; then
    $SUDO apt-get install -y lsb-release
fi

if type zypper > /dev/null 2>&1 ; then
    $SUDO zypper --gpg-auto-import-keys --non-interactive install lsb-release
fi

case $(lsb_release -si) in
Ubuntu|Debian|Devuan)
        $SUDO apt-get install -y dpkg-dev
        if ! test -r debian/control ; then
            echo debian/control is not a readable file
            exit 1
        fi
        touch $DIR/status
        packages=$(dpkg-checkbuilddeps --admindir=$DIR debian/control 2>&1 | \
            perl -p -e 's/.*Unmet build dependencies: *//;' \
            -e 's/build-essential:native/build-essential/;' \
            -e 's/\s*\|\s*/\|/g;' \
            -e 's/\(.*?\)//g;' \
            -e 's/ +/\n/g;' | sort)
        case $(lsb_release -sc) in
            squeeze|wheezy)
                packages=$(echo $packages | perl -pe 's/[-\w]*babeltrace[-\w]*//g')
                backports="-t $(lsb_release -sc)-backports"
                ;;
        esac
        packages=$(echo $packages) # change newlines into spaces
        $SUDO env DEBIAN_FRONTEND=noninteractive apt-get install $backports -y $packages || exit 1
        ;;
CentOS|Fedora|RedHatEnterpriseServer)
        case $(lsb_release -si) in
            Fedora)
                $SUDO yum install -y yum-utils
                ;;
            CentOS|RedHatEnterpriseServer)
                $SUDO yum install -y yum-utils
                MAJOR_VERSION=$(lsb_release -rs | cut -f1 -d.)
                if test $(lsb_release -si) == RedHatEnterpriseServer ; then
                    $SUDO yum install subscription-manager
                    $SUDO subscription-manager repos --enable=rhel-$MAJOR_VERSION-server-optional-rpms
                fi
                $SUDO yum-config-manager --add-repo https://dl.fedoraproject.org/pub/epel/$MAJOR_VERSION/x86_64/ 
                $SUDO yum install --nogpgcheck -y epel-release
                $SUDO rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-$MAJOR_VERSION
                $SUDO rm -f /etc/yum.repos.d/dl.fedoraproject.org*
                ;;
        esac
        sed -e 's/@//g' < ceph.spec.in > $DIR/ceph.spec
        $SUDO yum-builddep -y $DIR/ceph.spec 2>&1 | tee $DIR/yum-builddep.out
        ! grep -q -i error: $DIR/yum-builddep.out || exit 1
        ;;
*SUSE*)
        sed -e 's/@//g' < ceph.spec.in > $DIR/ceph.spec
        $SUDO zypper --non-interactive install $(rpmspec -q --buildrequires $DIR/ceph.spec) || exit 1
        ;;
*)
        echo "$(lsb_release -si) is unknown, dependencies will have to be installed manually."
        ;;
esac

function populate_wheelhouse() {
    local install=$1
    shift

    # Ubuntu-12.04 and Python 2.7.3 require this line
    pip --timeout 300 $install 'distribute >= 0.7.3' || return 1
    # although pip comes with virtualenv, having a recent version
    # of pip matters when it comes to using wheel packages
    pip --timeout 300 $install 'setuptools >= 0.8' 'pip >= 7.0' 'wheel >= 0.24' || return 1
    if test $# != 0 ; then
        pip --timeout 300 $install $@ || return 1
    fi
}

function activate_virtualenv() {
    local top_srcdir=$1
    local interpreter=$2
    local env_dir=$top_srcdir/install-deps-$interpreter

    if ! test -d $env_dir ; then
        virtualenv --python $interpreter $env_dir
        . $env_dir/bin/activate
        if ! populate_wheelhouse install ; then
            rm -rf $env_dir
            return 1
        fi
    fi
    . $env_dir/bin/activate
}

# use pip cache if possible but do not store it outside of the source
# tree
# see https://pip.pypa.io/en/stable/reference/pip_install.html#caching
mkdir -p install-deps-cache
top_srcdir=$(pwd)
export XDG_CACHE_HOME=$top_srcdir/install-deps-cache
wip_wheelhouse=wheelhouse-wip

#
# preload python modules so that tox can run without network access
#
find . -name tox.ini | while read ini ; do
    (
        cd $(dirname $ini)
        require=$(ls *requirements.txt 2>/dev/null | sed -e 's/^/-r /')
        if test "$require" && ! test -d wheelhouse ; then
            for interpreter in python2.7 python3 ; do
                type $interpreter > /dev/null 2>&1 || continue
                activate_virtualenv $top_srcdir $interpreter || exit 1
                populate_wheelhouse "wheel -w $wip_wheelhouse" $require || exit 1
            done
            mv $wip_wheelhouse wheelhouse
        fi
    )
done

for interpreter in python2.7 python3 ; do
    rm -rf $top_srcdir/install-deps-$interpreter
done
rm -rf $XDG_CACHE_HOME