GOPATH does not take effect

[shellus]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.8.1 windows/amd64

What operating system and processor architecture are you using (go env)?

set GOARCH=amd64
set GOBIN=
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\Users\shellus\go
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:\Users\shellus\AppData\Local\Temp\go-build143925707=/tmp/go-build -gno-record-gcc-switches
set CXX=g++
set CGO_ENABLED=1
set PKG_CONFIG=pkg-config
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

GOROOT is C:\Go GOPATH is not seting (I think it will use the default {user}/go)

C:\Users\shellus\go>tree
├─bin
├─pkg
│  └─windows_amd64
│      └─github.com
│          ├─akavel
│          │  └─rsrc
│          ├─AllenDang
│          ├─Knetic
│          └─lxn
│              └─walk
└─src
    └─github.com
        ├─akavel
        │  └─rsrc
        │      ├─binutil
        │      ├─coff
        │      └─ico
        ├─AllenDang
        │  └─w32
        ├─Knetic
        │  └─govaluate
        └─lxn
            ├─walk
            │  ├─data
            │  ├─declarative
            │  ├─examples
            │  │  ├─actions
            │  │  ├─clipboard
            │  │  ├─databinding
            │  │  ├─drawing
            │  │  ├─dropfiles
            │  │  ├─externalwidgets
            │  │  ├─filebrowser
            │  │  ├─gradientcomposite
            │  │  ├─imageicon
            │  │  ├─imageviewer
            │  │  ├─img
            │  │  ├─listbox
            │  │  ├─logview
            │  │  ├─multiplepages
            │  │  ├─notifyicon
            │  │  ├─progressindicator
            │  │  ├─radiobutton
            │  │  ├─settings
            │  │  ├─slider
            │  │  ├─statusbar
            │  │  ├─tableview
            │  │  └─webview
            │  ├─l10n
            │  └─tools
            │      └─ui2walk
            └─win

C:\Users\shellus\go>

i see GOPATH is {user}/go

but i usage makefile content:

export GOPATH:=$(shell pwd)

default: window

window:
	go install -tags 'release' win32api/createWindow

C:\data\c\my-go-starter>tree
C:.
├─.idea
│  └─libraries
├─bin
└─src
    ├─base
    ├─echo
    ├─gui
    ├─http
    ├─parse
    ├─signal
    ├─socket
    ├─syscall
    └─win32api
        ├─createWindow
        └─messageBox


C:\data\c\my-go-starter>make window
go install -tags 'release' win32api/createWindow
src\win32api\createWindow\createWindow.go:4:2: cannot find package "github.com/AllenDang/w32" in any of:
        C:\Go\src\github.com\AllenDang\w32 (from $GOROOT)
        c:\data\c\my-go-starter\src\github.com\AllenDang\w32 (from $GOPATH)
make: *** [window] Error 1

C:\data\c\my-go-starter>

How can i set GOPATH it up?

[matipan]

Hi!
So, the problem here is that you are not using the GOPATH correctly.
If you read(and you should) this section of How to Write Go Code, you'll understand that there can only be one GOPATH set, meaning that you can't have per-project GOPATHs.

In your example, you've used the default GOPATH(which is {user}/go) to go get a bunch of packages, then you created a program outside of the GOPATH, tried to set GOPATH to a new location and run go install. The problem here is that all the packages you need for your program are inside the previous GOPATH, which is why the go install tool is telling you that it cannot find them.

To make this work you need to remove the export GOPATH:=$(shell pwd) line from your Makefile, since I already said that you can't have per-project GOPATHs, and set your GOPATH again to be C:\Users\shellus\go>.

In conclusion, the GOPATH is working as intended and it is taking effect

[shellus]

@matipan Can GOPATH not use multiple directories?

[matipan]

If you want, you can have multiple workspaces. But take into account that the go tool will look for the packages your program imports inside GOPATH/src, so if you change the GOPATH to a different workspace that doesn't have the packages you need, the go tool will fail to build it.

To understand how the GOPATH works, you should read this section.
For more detailed information and examples see 'go help gopath'.

[mvdan]

For questions about Go, see https://github.com/golang/go/wiki/Questions.