configure

#!/bin/bash

showhelp()
{
cat << ENDHELP

usage: configure [options]
Configure p2p

Options:
    --dht=<url>
        Default DHT url

    --branch=<branch_ name>
        Specify a branch name. By default configure script will try to determine branch name
        using command line. Setting this option will modify version output and target DHT

    --os=<operating_system>
        Specify operating system handle: linux, darwin, windows

    --help
    Display this help screen
ENDHELP
}

name_prefix=p2p
gopath=
branch=
dht=""
argOS=""
targetURL="subutai.io"

while [ $# -ge 1 ]; do
    case "$1" in
        --branch=*)
            branch="`echo ${1} | awk '{print substr($0,10)}'`" ;;
        --dht=*)
            dht="`echo ${1} | awk '{print substr($0,7)}'`" ;;
        --os=*)
            argOS="`echo ${1} | awk '{print substr($0,6)}'`" ;;
        --help)
            showhelp
            exit 0
            ;;
        *)
            echo "ERROR: Unknown argument: $1"
            showhelp
            exit 1
            ;;
    esac

    shift
done


if [ "$argOS" != "linux" ] && [ "$argOS" != "darwin" ] && [ "$argOS" != "windows" ]; then
    argOS=""
fi

if [ -z "$argOS" ]; then
    argOS=$(uname -s | tr '[:upper:]' '[:lower:]')
fi

# Workaround for AppVeyor
if [ "$argOS" == "windows" ]; then
    location="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
    cd $location
fi

if [ -z "$branch" ]; then
    echo "Branch was not specified. Trying to determine"
    branch=`git rev-parse --abbrev-ref HEAD`
    if [ $? -ne 0 ]; then
        echo "Failed to determine branch using git command. Exiting"
        exit 25
    fi
fi

echo "Preparing \"${branch}\" build for ${argOS}"

version=`cat VERSION`
build=`git describe`
source_list=`ls | grep .go`
source_files="${source_list//$'\n'/ }"

name_base="$name_prefix"
if [ "$branch" != "HEAD" ]; then
    name_base=$name_prefix-$branch
fi

echo "Building $name_base"

if [ "$dht" == "" ]; then
    echo "Determining DHT address"
    if [ "$branch" == "dev" ]; then
        dht="devdht"
    elif [ "$branch" == "master" ]; then
        dht="masterdht"
    elif [ "$branch" == "sysnet" ]; then
        dht="sysnetdht"
    else
        dht="dht"
    fi
    echo "DHT is set to $dht"
else
    echo "DHT is set to $dht"
fi

log_level="INFO"
if [ "$branch" == "HEAD" ]; then
    log_level="WARNING"
elif [ "$branch" == "master" ]; then
    log_level="DEBUG"
elif [ "$branch" == "dev" ]; then
    log_level="DEBUG"
elif [ "$branch" == "sysnet" ]; then
    log_level="TRACE"
fi

if [ "$argOS" != "windows" ]; then

    echo "Checking go environment"
    if [ "$GOPATH" == "" ]; then
        echo "GOPATH is not set. Setting to /tmp/go-path-tmp directory"
        gopath=/tmp/go-path-tmp
    fi

    echo "Downloading necessary packages"
    if [ ! -z $gopath ]; then
        export GOPATH=$HOME
        export GOBIN=$HOME/go-bin
    fi

    go get
    go get -u github.com/golang/protobuf/proto

fi

if [ "$argOS" == "windows" ]; then
    output_file="build.bat"
    echo ":: ${output_file} generated by configure script" > $output_file
    echo "go get" >> $output_file
    echo "go build -ldflags=\"-w -s -X main.AppVersion=${version}-${branch} -X main.DefaultDHT=${dht} -X main.BuildID=${build} -X main.DefaultLog=${log_level}\" -o p2p.exe github.com/subutai-io/p2p" >> $output_file
else
    # generating config.make file
    echo "# config.make generated by configure script" > config.make
    echo "NAME_BASE = $name_base" >> config.make
    echo "NAME_PREFIX = $name_prefix" >> config.make
    echo "DHT_ENDPOINTS = $dht" >> config.make
    echo "LOG_LEVEL = $log_level" >> config.make
    if [ "$dht" != "" ]; then
        echo "DHT = $dht" >> config.make
    fi
    if [ "$branch" != "HEAD" ]; then
        echo "BRANCH_POSTFIX = -$branch" >> config.make
    fi
    #
    echo "export NAME_BASE" >> config.make
    echo "export NAME_PREFIX" >> config.make
    echo "export DHT_ENDPOINTS" >> config.make
    echo "export LOG_LEVEL" >> config.make
    if [ ! -z "$gopath" ]; then
    echo "GOPATH = $HOME" >> config.make
    echo "export GOPATH" >> config.make
    fi
    if [ "$branch" != "HEAD" ]; then
        echo "export BRANCH_POSTFIX" >> config.make
    fi
fi