Go: cannot find module providing package

[alwindoss]

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

$ go version
go version go1.11.2 windows/amd64

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:Users\212326985\AppData\Localgo-build

set GOEXE=.exe

set GOFLAGS=

set GOHOSTARCH=amd64

set GOHOSTOS=windows

set GOOS=windows

set GOPATH=C:\Drive\Programminggo

set GOPROXY=

set GORACE=

set GOROOT=C:\Go

set GOTMPDIR=

set GOTOOLDIR=C:\Gopkg\tool\windows_amd64

set GCCGO=gccgo

set CC=gcc

set CXX=g++

set CGO_ENABLED=1

set GOMOD=

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 -fmessage-length=0 -fdebug-prefix-map=C:Users\212326~1\AppData\Local\Tempgo-build644952330=/tmp/go-build -gno-record-gcc-switches

What did you do?

I have files with the following contents

messaging.go

package messaging

import (
    "github.com/aws/aws-sdk-go/service/sqs/sqsiface"
    "strings"
)

// Listener is the interface that defines what the listener can do
type Listener interface {
    Listen()
}

type SQSConfig struct {

}

// NewSQSListener is the factory function using which we can create different types of listeners
func NewSQSListener(svc sqsiface.SQSAPI, cfg *SQSConfig) (Listener) {
        return &sqsListener{svc: svc}
}

type sqsListener struct {
    svc sqsiface.SQSAPI
    cfg SQSConfig
}

func (l *sqsListener) Listen() {
    // sqsiface.SQSAPI
}

and

main.go

package main

import (
    "github.com/aws/aws-sdk-go/service/sqs"
    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/aws/session"

    "github.enterpriseurl.com/user/tesla/pkg/messaging"
)

func main() {
    sess := session.Must(session.NewSessionWithOptions(session.Options{
        SharedConfigState: session.SharedConfigEnable,
    }))

    svc := sqs.New(sess)
    l := messaging.NewSQSListener(svc, nil)
    l.Listen()
}

When I run go build, I get the following error

..\..\go\pkg\mod\github.com\aws\[email protected]\aws\credentials\shared_credentials_provider.go:8:2: unknown import path "github.com/aws/aws-sdk-go/internal/ini": cannot find module providing package github.com/aws/aws-sdk-go/internal/ini
..\..\go\pkg\mod\github.com\aws\[email protected]\aws\types.go:7:2: unknown import path "github.com/aws/aws-sdk-go/internal/sdkio": cannot find module providing package github.com/aws/aws-sdk-go/internal/sdkio
..\..\go\pkg\mod\github.com\aws\[email protected]\aws\client\default_retryer.go:8:2: unknown import path "github.com/aws/aws-sdk-go/internal/sdkrand": cannot find module providing package github.com/aws/aws-sdk-go/internal/sdkrand
..\..\go\pkg\mod\github.com\aws\[email protected]\aws\ec2metadata\api.go:12:2: unknown import path "github.com/aws/aws-sdk-go/internal/sdkuri": cannot find module providing package github.com/aws/aws-sdk-go/internal/sdkuri
..\..\go\pkg\mod\github.com\aws\[email protected]\aws\credentials\shared_credentials_provider.go:9:2: unknown import path "github.com/aws/aws-sdk-go/internal/shareddefaults": cannot find module providing package github.com/aws/aws-sdk-go/internal/shareddefaults
main.go:6:2: unknown import path "github.com/aws/aws-sdk-go/service/sqs": cannot find module providing package github.com/aws/aws-sdk-go/service/sqs
pkg\messaging\messaging.go:4:2: unknown import path "github.com/aws/aws-sdk-go/service/sqs/sqsiface": cannot find module providing package github.com/aws/aws-sdk-go/service/sqs/sqsiface
..\..\go\pkg\mod\github.com\aws\[email protected]\aws\credentials\stscreds\assume_role_provider.go:89:2: unknown import path "github.com/aws/aws-sdk-go/service/sts": cannot find module providing package github.com/aws/aws-sdk-go/service/sts

What did you expect to see?

I expected the project to build

What did you see instead?

I saw the error mentioned above

[myitcv]

@alwindoss I'm fairly certain there's no bug here, because, modulo fixing a few issues with your repro above, this works for me:

$ cd $(mktemp -d)
$ go mod init github.enterpriseurl.com/user/tesla/pkg
go: creating new go.mod: module github.enterpriseurl.com/user/tesla/pkg
$ cat <<EOD >main.go
package main

import (
        "github.com/aws/aws-sdk-go/aws/session"
        "github.com/aws/aws-sdk-go/service/sqs"

        "github.enterpriseurl.com/user/tesla/pkg/messaging"
)

func main() {
        sess := session.Must(session.NewSessionWithOptions(session.Options{
                SharedConfigState: session.SharedConfigEnable,
        }))

        svc := sqs.New(sess)
        l := messaging.NewSQSListener(svc, nil)
        l.Listen()
}
EOD
$ mkdir messaging
$ cat <<EOD >messaging/messaging.go
package messaging

import (
        "github.com/aws/aws-sdk-go/service/sqs/sqsiface"
)

// Listener is the interface that defines what the listener can do
type Listener interface {
        Listen()
}

type SQSConfig struct {
}

// NewSQSListener is the factory function using which we can create different types of listeners
func NewSQSListener(svc sqsiface.SQSAPI, cfg *SQSConfig) Listener {
        return &sqsListener{svc: svc}
}

type sqsListener struct {
        svc sqsiface.SQSAPI
        cfg SQSConfig
}

func (l *sqsListener) Listen() {
        // sqsiface.SQSAPI
}
EOD
$ go build
go: finding github.com/aws/aws-sdk-go/service/sqs latest
go: finding github.com/aws/aws-sdk-go/aws/session latest
go: finding github.com/aws/aws-sdk-go/service/sqs/sqsiface latest
go: finding github.com/aws/aws-sdk-go/service latest
go: finding github.com/aws/aws-sdk-go v1.15.81
go: finding github.com/aws/aws-sdk-go/aws latest
go: downloading github.com/aws/aws-sdk-go v1.15.81
go: finding github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8
go: downloading github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8
$ cat go.mod
module github.enterpriseurl.com/user/tesla/pkg

require github.com/aws/aws-sdk-go v1.15.81

Can I therefore suggest we move the discussion to another forum? https://github.com/golang/go/wiki/Questions

[alwindoss]

Are you saying if I have a package within my project I need to create a module out of it else I will not be able to use it from within my project?

[myitcv]

No. A module is a collection of packages. In the example above, I created a "dummy" module github.enterpriseurl.com/user/tesla/pkg that contains two packages:

• github.enterpriseurl.com/user/tesla/pkg - the main package
• github.enterpriseurl.com/user/tesla/pkg/messaging - the messaging package

As I mentioned above, please let's move discussion to another forum: https://github.com/golang/go/wiki/Questions

[myitcv]

Also to make sure you are aware of the modules wiki: https://github.com/golang/go/wiki/Modules

[alwindoss]

@myitcv This issue is not resolved. Let's not hurriedly close issues until it really is.

You are making some assumptions here:

1. That I do not have a go.mod file. Truth is I do have it and I have listed the contents of it below
2. I am not sure why you are doing a go mod init github.enterpriseurl.com/user/tesla/pkg. The root of my project is tesla and I can confirm that it has a go.mod file and following is the content

go.mod file

module github.enterpriseurl.com/user/tesla

require github.com/aws/aws-sdk-go v1.15.81

Following is my project structure:

tesla/main.go
tesla/go.mod
tesla/go.sum
tesla/pkg/messaging/messaging.go

As far as I am concerned this is still an issue. Request you to please reopen this issue. If you have any questions please ask I am more than happy to answer them.

PS: if I copy this project structure into the $GOPATH/src/github.enterpriseurl.com/user/tesla the same project builds without any issue using go build

[myitcv]

@alwindoss

Let's not hurriedly close issues until it really is.

I closed the issue because I don't see an issue here, and included a full reproduction https://github.com/golang/go/issues/28928#issuecomment-441252752 to illustrate that.

1. That I do not have a go.mod file. Truth is I do have it and I have listed the contents of it below
2. am not sure why you are doing a go mod init github.enterpriseurl.com/user/tesla/pkg. The root of my project is tesla and I can confirm that it has a go.mod file and following is the content

No, I wasn't assuming you don't have a go.mod. My use of go mod init is included as part of my full reproduction. The actual module path is not significant in this case, but for completeness, I have modified the reproduction below.

As a next step, please can you try the steps below (at least the Windows equivalent commands) and include a full log of the commands and their output?

$ export GOPATH=$(mktemp -d)
$ cd $(mktemp -d)
$ go mod init github.enterpriseurl.com/user/tesla
go: creating new go.mod: module github.enterpriseurl.com/user/tesla
$ cat <<EOD >main.go
package main

import (
        "github.com/aws/aws-sdk-go/aws/session"
        "github.com/aws/aws-sdk-go/service/sqs"

        "github.enterpriseurl.com/user/tesla/pkg/messaging"
)

func main() {
        sess := session.Must(session.NewSessionWithOptions(session.Options{
                SharedConfigState: session.SharedConfigEnable,
        }))

        svc := sqs.New(sess)
        l := messaging.NewSQSListener(svc, nil)
        l.Listen()
}
EOD
$ mkdir -p pkg/messaging
$ cat <<EOD >pkg/messaging/messaging.go
package messaging

import (
        "github.com/aws/aws-sdk-go/service/sqs/sqsiface"
)

// Listener is the interface that defines what the listener can do
type Listener interface {
        Listen()
}

type SQSConfig struct {
}

// NewSQSListener is the factory function using which we can create different types of listeners
func NewSQSListener(svc sqsiface.SQSAPI, cfg *SQSConfig) Listener {
        return &sqsListener{svc: svc}
}

type sqsListener struct {
        svc sqsiface.SQSAPI
        cfg SQSConfig
}

func (l *sqsListener) Listen() {
        // sqsiface.SQSAPI
}
EOD
$ tree --noreport
.
|-- go.mod
|-- main.go
`-- pkg
    `-- messaging
        `-- messaging.go
$ go build
go: finding github.com/aws/aws-sdk-go/service/sqs/sqsiface latest
go: finding github.com/aws/aws-sdk-go/service/sqs latest
go: finding github.com/aws/aws-sdk-go/aws/session latest
go: finding github.com/aws/aws-sdk-go/service latest
go: finding github.com/aws/aws-sdk-go/aws latest
go: finding github.com/aws/aws-sdk-go v1.15.82
go: downloading github.com/aws/aws-sdk-go v1.15.82
go: finding github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8
go: downloading github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8
$ cat go.mod
module github.enterpriseurl.com/user/tesla

require github.com/aws/aws-sdk-go v1.15.82

[alwindoss]

@myitcv I don't know how to explain this, what did not work last night for me apparently is working now. I have not made any changes to the code but when I ran go build it is successfully building now.

If for some reason I am able to replicate it I will add the details here.

[agnivade]

Thanks. Feel free to reopen along with the full log if you encounter the issue again.

[volodimyr]

It occurs when you did go mod init and renamed your project after.
I had the same @alwindoss.

I just removed modules from project and did go mod init and go mod vendor again.

[deepakjacob]

This issue occurred to me today - with go 1.12 . The error was due to an old emacs fly-check version meddling with go vet.

Reinstalling latest emacs plugins by deleting ~/.emacs.d/elpa folder resolved the issue.

[tetrahedronix]

Why does this error occur when I set

GOPROXY=file:///home/tetravalence/Workspace/src

to my local repository to do some private development work?

[phanirithvij]

It occurred for me because my top level go.mod directory had no go files

├── go.mod
├── go.sum
├── LICENSE
├── README.md
└── server
    ├── api
    │   ├── api.go
     ...

module github.com/exampler/example

go 1.15

It was fixed after I added a go file something.go in the directory containing the go.mod file with package example
It took me 3-4 hrs to realize this.