auto add current directory in to GOPATH

gistfile1.txt

export GOPATH="$HOME/.go"
_gopath_auto_activate() {
    if [ -e "main.go" ]; then
        # Check to see if already activated to avoid redundant activating
        FINDED=false
        PWD=$(pwd -P)
        array=(${GOPATH//:/ })
        for p in "${!array[@]}"; do
          if [[ "${array[p]}" == "$PWD" ]]; then     
                FINDED=true
          fi;
        done; 
        if [[  $FINDED != true  ]]; then
           export GOPATH="$GOPATH:$PWD"
        fi;
    fi
}

export PROMPT_COMMAND=_gopath_auto_activate