godev

#!/usr/bin/env bash


# alias godev="source /usr/local/bin/godev"

EchoHelp() {
        echo "Hello"
}

NewGoProject() {
        echo set up new go project at $1
        mkdir -p "$1"/{src,bin,pkg}
        cd $ParamNewGoProjectPath
        LeaveGodevMode
        EnterGodevMode
}


LeaveGodevMode() {
        if [ "$GODEV_MODE" != "true" ]; then
                #echo Not in godev mode
                return 0
        fi

        echo leave GODEV_MODE
        unset GODEV_MODE

        if [ "$GODEV_OLD_GOPATH" != "" ]; then
                echo "reverting GOPATH to $GODEV_OLD_GOPATH"
                export GOPATH=$GODEV_OLD_GOPATH
                unset GODEV_OLD_GOPATH
        else
                unset GOPATH
        fi

        if [ "$GODEV_OLD_PATH" != "" ]; then
                echo "reverting PATH to $GODEV_OLD_PATH"
                export PATH=$GODEV_OLD_PATH
                unset GODEV_OLD_PATH
        fi
}


EnterGodevMode() {
        if [ "$GODEV_MODE" == "true" ]; then
                #echo Already in godev mode
                return 0;
        fi

        echo enter GODEV_MODE
        export GODEV_MODE=true
        export GODEV_OLD_PATH=$PATH

        if [ "$GOPATH" != "" ]; then
                export GODEV_OLD_GOPATH=$GOPATH
        fi

        export GOPATH=`pwd`
        export GODEV_OLD_PATH=$PATH
        export PATH=$PATH:$GOPATH/bin/
}

ParamNewGoProjectPath=""
Cmd="Fallback"

set -e

while (( "$#" )); do
        case "$1" in
                -h|--help|help)
                        # echo help string
                        EchoHelp
                        Cmd="EchoHelp"
                        shift
                        break
                        ;;
                --)
                        # end argument parsing
                        shift
                        break
                        ;;
                -e|--enter|enter)
                        EnterGodevMode
                        Cmd="EnterGodevMode"
                        shift
                        break
                        ;;
                -l|--leave|leave)
                        LeaveGodevMode
                        Cmd="LeaveGodevMode"
                        shift
                        break
                        ;;
                -n|--new|new)
                        if [ -z $2 ]; then
                                echo "-n|--new|new need one argument"
                                return 1
                        fi
                        ParamNewGoProjectPath=$(realpath $2)
                        NewGoProject $ParamNewGoProjectPath
                        Cmd="NewGoProject"
                        shift 2
                        break
                        ;;
                *)
        esac
done

# fallback behaviour is Set/Unset GODEV_MODE
if [ "$Cmd" == "Fallback" ]; then
        if [ "$GODEV_MODE" == "true" ]; then
                LeaveGodevMode
        else
                EnterGodevMode
        fi
fi

set +e