cannot download, $GOPATH not set
go, installation, macos
Solution
[Update: as of Go 1.8, `GOPATH` defaults to `$HOME/go`, but you may still find this useful if you want to understand the `GOPATH` layout, customize it, etc.]
The official Go site discusses GOPATH and how to lay out a workspace directory.
`export GOPATH="$HOME/your-workspace-dir/"` -- run it in your shell, then add it to `~/.bashrc` or equivalent so it will be set for you in the future. Go will install packages under `src/`, `bin/`, and `pkg/`, subdirectories there. You'll want to put your own packages somewhere under `$GOPATH/src`, like `$GOPATH/src/github.com/myusername/` if you want to publish to GitHub. You'll also probably want `export PATH=$PATH:$GOPATH/bin` in your `.bashrc` so you can run compiled programs under `$GOPATH`.
Optionally, via Rob Pike, you can also set `CDPATH` so it's faster to `cd` to package dirs in bash: `export CDPATH=.:$GOPATH/src/github.com:$GOPATH/src/golang.org/x` means you can just type `cd net/html` instead of `cd $GOPATH/src/golang.org/x/net/html`.
Keith Rarick notes you can set `GOPATH=$HOME` to put Go's `src/`, `pkg/` and `bin/` directories right under your homedir. That can be nice (for instance, you might already have `$HOME/bin` in your path) but of course some folks use multiple workspaces, etc.
Problem
I want to install json2csv using `go get github.com/jehiah/json2csv` but I receive this error: ``` package github.com/jehiah/json2csv: cannot download, $GOPATH not set. For more details see: go help go path ``` Any help on how to fix this on MacOS?