Go: cmd/go: Problem using go modules

[athreya92]

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

$ go version
go 1.12

Does this issue reproduce with the latest release?

yes

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

go env Output

$ go env

set GOARCH=amd64

set GOBIN=

set GOCACHE=C:UsersathreyaAppDataLocalgo-build

set GOEXE=.exe

set GOFLAGS=

set GOHOSTARCH=amd64

set GOHOSTOS=windows

set GOOS=windows

set GOPATH=C:Usersathreyago

set GOPROXY=

set GORACE=

set GOROOT=C:Go

set GOTMPDIR=

set GOTOOLDIR=C:Gopkgtoolwindows_amd64

set GCCGO=gccgo

set CC=gcc

set CXX=g++

set CGO_ENABLED=1

set GOMOD=C:tmpscratchpadhellogo.mod

set CGO_CFLAGS=-g -O2

set CGO_CPPFLAGS=

set CGO_CXXFLAGS=-g -O2

set CGO_FFLAGS=-g -O2

set CGO_LDFLAGS=-g -O2

set PKG_CONFIG=pkg-config

set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:UsersathreyaAppDataLocalTempgo-build974406930=/tmp/go-build -gno-record-gcc-switches

What did you do?

Tried to setup go modules using the link https://github.com/golang/go/wiki/Modules
Tried the QuickStart guide to start using modules

What did you expect to see?

Build successfully and run the program

What did you see instead?

`go build

can't load package: package github.com/you/hello: unknown import path "github.com/you/hello": cannot find module providing package github.com/you/hello`

Please help

[rvolykh]

Hello, did you execute go mod init github.com/you/hello?

Can you please show content of go.mod file?

And if your project is under GOPATH, please try GO111MODULE=on go build

[athreya92]

I tried it outside the GOPATH.
Well now I change the go version to v1.11.9 and go modules are working fine. I'm not sure what caused the error in v1.12.3.

[bcmills]

@athreya92, there is not enough information here to diagnose the problem. For example, we don't know what is importing github.com/you/hello or why we should expect that import to succeed.

Please provide a self-contained code example with a specific sequence of commands that we can run to reproduce the problem with 1.12.3.

[leighmcculloch]

I am experiencing the same issue, but it is intermittent.

$ go version
go version go1.12 linux/amd64

$ git clone https://github.com/braintree-go/braintree-go
...
$ go build
braintree.go:4:2: unknown import path "bytes": cannot find module providing package bytes
response.go:4:2: unknown import path "compress/gzip": cannot find module providing package compress/gzip
add_on_gateway.go:3:8: unknown import path "context": cannot find module providing package context
hmac.go:4:2: unknown import path "crypto/hmac": cannot find module providing package crypto/hmac
hmac.go:5:2: unknown import path "crypto/sha1": cannot find module providing package crypto/sha1
braintree.go:6:2: unknown import path "crypto/tls": cannot find module providing package crypto/tls
credentials_api_key.go:3:8: unknown import path "encoding/base64": cannot find module providing package encoding/base64
account_updater_daily_report.go:3:8: unknown import path "encoding/xml": cannot find module providing package encoding/xml
braintree.go:8:2: unknown import path "errors": cannot find module providing package errors
braintree.go:9:2: unknown import path "fmt": cannot find module providing package fmt
customfields/custom_fields.go:5:2: unknown import path "io": cannot find module providing package io
response.go:7:2: unknown import path "io/ioutil": cannot find module providing package io/ioutil
braintree.go:10:2: unknown import path "log": cannot find module providing package log
braintree.go:11:2: unknown import path "net": cannot find module providing package net
braintree.go:12:2: unknown import path "net/http": cannot find module providing package net/http
credit_card_gateway.go:7:2: unknown import path "net/url": cannot find module providing package net/url
decimal.go:5:2: unknown import path "strconv": cannot find module providing package strconv
customfields/custom_fields.go:6:2: unknown import path "strings": cannot find module providing package strings
webhook_testing_gateway.go:13:2: unknown import path "text/template": cannot find module providing package text/template
date/date.go:5:2: unknown import path "time": cannot find module providing package time
errors.go:8:2: unknown import path "unicode": cannot find module providing package unicode
$ cat go.mod
module github.com/braintree-go/braintree-go

go 1.12

I retried go build several times, and it worked on the third attempt.

[bcmills]

@leighmcculloch, go1.12 is several patches behind at this point. Can you still reproduce the problem with go1.12.4?

[gopherbot]

Timed out in state WaitingForInfo. Closing.

(I am just a bot, though. Please speak up if this is a mistake or you have the requested information.)

[arhyth]

having this problem also.
@ go version go1.12.6 linux/amd64

can't load package: package bitbucket.org/xXXx/scheduled-tasks: unknown import path "bitbucket.org/xXXx/scheduled-tasks": cannot find module providing package bitbucket.org/xXXx/scheduled-tasks

there are nil, nada, zero imports of bitbucket.org/xXXx/scheduled-tasks anywhere

and this is in go.mod, so that's covered

module bitbucket.org/xXXx/scheduled-tasks

go 1.12

aside from the main package which is inside /cmd dir, all the packages are inside /pkg dir under the module dir

[bcmills]

@arhyth, the diagnostics for missing imports have been improved substantially in Go 1.13. Please try your build with 1.13, and if it still seems incorrect please open a new issue with steps to reproduce.

[arhyth]

upgraded to 1.13.
i run

> go build

now i only have this error

build .: cannot find module for path .

i'm not sure whether to open an issue or there's some small thing that i am just missing, as i'm fairly new to Go.

[bcmills]

go build is equivalent to go build ., which will fail if there are no Go source files (or no non-test source files) in the current directory.

If you want to build all of the packages within the module, use go build ./... instead.