module

#!/bin/bash

function volume_module() {
    # generate "volume_build.go" file
    if [[ ! -f ${volume_build} ]]; then
    cat << END > ${volume_build}
// +build linux

// The file is automatically generated, DON'T EDIT.

package main

END
    fi

    grep -q $1 ${volume_build}
    if [[ $? -ne "0" ]]
    then
        echo "import _ \"$1\"" >> ${volume_build}
    fi
}

function hook_plugins_module() {
    # generate "hook_plugins_build.go" file
    if [[ ! -f ${hook_plugins_build} ]]; then
    cat << END > ${hook_plugins_build}
// +build linux

// The file is automatically generated, DON'T EDIT.

package main

END
    fi

    grep -q $1 ${hook_plugins_build}
    if [[ $? -ne "0" ]]; then
        echo "import _ \"$1\"" >> ${hook_plugins_build}
    fi
}

help=
clean=
gcflags=
volume_build=volume_build.go
hook_plugins_build=hook_plugins_build.go

opt=
for option
do
    opt="$opt `echo $option | sed -e \"s/\(--[^=]*=\)\(.* .*\)/\1'\2'/\"`"

    case "$option" in
        -*=*) value=`echo "$option" | sed -e 's/[-_a-zA-Z0-9]*=//'` ;;
           *) value="" ;;
    esac

    case "$option" in
        --help)                     help=yes                                    ;;
        -h)                         help=yes                                    ;;

        --clean)                    clean=yes                                   ;;

        --add-volume=*)
            volume_module $value
        ;;
        --add-plugin=*)
            hook_plugins_module $value
        ;;
        *)
            echo "$0: error: invalid option \"$option\""
            exit 1
        ;;
    esac
done

if [[ "${clean}" == "yes" ]]; then
    rm -f ${volume_build}
    rm -f ${hook_plugins_build}
    exit 0
fi

if [[ "${help}" == "yes" ]]; then
    echo "usage:"
    echo "     module [options]"
    echo ""
    echo "options:"
    echo "     --help, -h          Print help information"
    echo "     --add-volume=       Add a volume driver module to compile"
    echo "     --add-plugin=       Add a hook plugin to compile"
    echo "     --clean             Remove temporary codes, the 'build.go'"
    echo ""
    echo "     ./module            To comiple directly on current codes, include added modules"
    echo ""
    echo "     ./module --add-volume=github.com/alibaba/pouch/storage/volume/examples/demo"
    echo "     A example show how to add a driver module, 'github.com/alibaba/pouch/storage/volume/examples/demo' is a Go's package"
    echo "     can be found in \$GOPATH"
    exit 0
fi