Show gopher when current working directory is under GOPATH

bashrc-snippet.bash

__pschar () {
        IFS=':' read -ra PDIRS <<< "$GOPATH"
        for P in "${PDIRS[@]}" ; do
                test "${1#$P}" = "$1" || {
                        printf ""
                        return
                }
        done
        printf "¶"
}
PS1='...$(__pschar "$PWD") '

pcd () { cd $(go list -f '{{.Dir}}' .../$1) ; }