The convention for Go working environments is to clump everything in one "Gopath" - which kind of acts as a universal environment. But I don't like that; if I'm working on multiple Git projects, I might want a completely separate environment with separate packages and a src directory just for my project. Maybe I'm wrong but this seems to work. N…

switch.sh

#!/bin/bash

subdir=${1%/}

if [ ! $subdir ]; then
  echo "Please specify an argument"
  exit
fi

dir="${PWD}/$subdir"

if [ ! -d "$dir" ]; then
  echo "$dir does not exist"
  exit
fi

stripped=$(echo ${PATH} | awk -v RS=: -v ORS=: "/${GOPATH##*/}/ {next} {print}" | sed 's/:*$//')
if [ ! $stripped ]; then
   stripped=$PATH
fi

export GOPATH=$dir
export PATH=$stripped:$dir/bin