setup go workspace separated from $GOROOT using direnv, make it work nicely with gvm

setup.sh

#!/bin/bash -e

# assuming you've already installed GO and direnv
# and your desired workspace is at $HOME/go-workspace

# first, create workspace skeleton and go to workspace
mkdir -p ~/workspace/{bin,src,pkg}
cd ~/workspace/

# create .envrc with predefined layout (direnv built-in layout)
echo 'layout go' > .envrc

# trust this .envrc (required for first run)
dirnev allow

# and then, anytime you enter your workspace or its child directory
# direnv will automatically load workspace path into environment variable

# start working on a package
# let's try https://github.com/OscarYuen/go-graphql-starter

cd src/

git clone git@github.com:OscarYuen/go-graphql-starter.git github.com/OscarYuen/go-graphql-starter
cd $_

# it works pretty well. ;)
dep ensure

This also works

mkdir -p ~/workspace/{bin,src,pkg}
cd ~/workspace/

Then put this into your ~/.zshrc

# activate gvm
[[ -s "$HOME/.gvm/scripts/gvm" ]] && source "$HOME/.gvm/scripts/gvm"

# modify $GOPATH
export GOPATH="$GOPATH:$HOME/workspace"
export PATH="$HOME/workspace/bin:$PATH"