cannot download, $GOPATH not set

Question

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?

Answer 1

I found easier to do it like this:

export GOROOT=$HOME/go
export GOPATH=$GOROOT/bin
export PATH=$PATH:$GOPATH

Answer 2

Your $GOROOT should not be set up. You $GOPATH should be set to $HOME/go by typing export $GOPATH=$HOME/go

Please type export GOROOT="" to fix your problem.

Answer 3

For MAC this worked well for me.

sudo nano /etc/bashrc

and add the below at the end of the file

export PATH=$PATH:/usr/local/opt/go/libexec/bin
export GOPATH=/usr/local/opt/go/bin

This should fix the problem. Try opening a new terminal and echo $GOPATH you should see the correct value.

Answer 4

I had to run an application as root (to open a webserver on port 80), this produced the error for me, because the sudo user has a different environment than the normal user, hence GOPATH was not set.

If someone else is having this problem, add -E to the command, this will preserve the user environment.

sudo -E go run main.go

For more infos see discussion here: Google Groups – GOPATH Problem

Answer 5

This one worked

Setting up Go development environment on Ubuntu, and how to fix $GOPATH / $GOROOT

Steps

mkdir ~/go

Set $GOPATH in .bashrc,

export GOPATH=~/go
export PATH=$PATH:$GOPATH/bin

Answer 6

Using brew

I installed it using brew.

$ brew install go

When it was done if you run this brew command it'll show the following info:

$ brew info go
go: stable 1.4.2 (bottled), HEAD
Go programming environment
https://golang.org
/usr/local/Cellar/go/1.4.2 (4676 files, 158M) *
  Poured from bottle
From: https://github.com/Homebrew/homebrew/blob/master/Library/Formula/go.rb
==> Options
--with-cc-all
    Build with cross-compilers and runtime support for all supported platforms
--with-cc-common
    Build with cross-compilers and runtime support for darwin, linux and windows
--without-cgo
    Build without cgo
--without-godoc
    godoc will not be installed for you
--without-vet
    vet will not be installed for you
--HEAD
    Install HEAD version
==> Caveats
As of go 1.2, a valid GOPATH is required to use the `go get` command:
  https://golang.org/doc/code.html#GOPATH

You may wish to add the GOROOT-based install location to your PATH:
  export PATH=$PATH:/usr/local/opt/go/libexec/bin

The important pieces there are these lines:

/usr/local/Cellar/go/1.4.2 (4676 files, 158M) *

export PATH=$PATH:/usr/local/opt/go/libexec/bin

Setting up GO's environment

That shows where GO was installed. We need to do the following to setup GO's environment:

$ export PATH=$PATH:/usr/local/opt/go/libexec/bin
$ export GOPATH=/usr/local/opt/go/bin

You can then check using GO to see if it's configured properly:

$ go env
GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/usr/local/opt/go/bin"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.4.2/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.4.2/libexec/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fno-common"
CXX="clang++"
CGO_ENABLED="1"

Setting up json2csv

Looks good, so lets install json2csv:

$ go get github.com/jehiah/json2csv
$

What just happened? It installed it. You can check like this:

$ $ ls -l $GOPATH/bin
total 5248
-rwxr-xr-x  1 sammingolelli  staff  2686320 Jun  9 12:28 json2csv

OK, so why can't I type json2csv in my shell? That's because the /bin directory under $GOPATH isn't on your $PATH.

$ type -f json2csv
-bash: type: json2csv: not found

So let's temporarily add it:

$ export PATH=$GOPATH/bin:$PATH

And re-check:

$ type -f json2csv
json2csv is hashed (/usr/local/opt/go/bin/bin/json2csv)

Now it's there:

$ json2csv --help
Usage of json2csv:
  -d=",": delimiter used for output values
  -i="": /path/to/input.json (optional; default is stdin)
  -k=[]: fields to output
  -o="": /path/to/output.json (optional; default is stdout)
  -p=false: prints header to output
  -v=false: verbose output (to stderr)
  -version=false: print version string

Add the modifications we've made to $PATH and $GOPATH to your $HOME/.bash_profile to make them persist between reboots.