x/website: tutorial create a module, cannot find package "example.com/greetings"

[reevelau]

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

$ go version
go version go1.15.5 darwin/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
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/test/Library/Caches/go-build"
GOENV="/Users/test/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/test/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/test/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/opt/go/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/opt/go/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/tl/cxz4mjv55xl2rdcq1rb8jp280000gn/T/go-build149309703=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

I am trying to follow the tutorial to create and reference it in hello.go. The source code of hello.go can be found in the next page, call-module-code.

But when I execute go run hello.go the process failed with error message. To workaround the issue, I need to delete example.com/ before greetings. I double checked the context of the tutorial, there isn't a hint of creating directory structure example.com/greetings but greetings. I don't know whether it was working in the older version of go.

May be creating the structure like this, before creating the go.mod, would smooth the experience of the tutorial

mkdir -p example.com/greetings
cd example.com/greetings

What did you expect to see?

Hi, Gladys. Welcome!

What did you see instead?

hello.go:6:2: cannot find package "example.com/greetings" in any of:
	/usr/local/opt/go/libexec/src/example.com/greetings (from $GOROOT)
	/Users/test/go/src/example.com/greetings (from $GOPATH)

[task4233]

@reevelau
I do not think that you have to create example.com/greetings but greetings.
In my environment, the directory structure was as follows after finishing this page.

$ tree .
.
├── greetings
│   ├── go.mod
│   └── greetings.go
└── hello
    ├── go.mod
    ├── hello
    └── hello.go

2 directories, 5 files 

If you would like to create the directory structure, example.com/greetings, you have to modify go.mod in hello/go.mod as follows.

module hello

go 1.15

replace example.com/greetings => ../example.com/greetings

I hope this helps you.

[ALTree]

I agree that the tutorial should work as it is and you shouldn't need to mkdir -p example.com/greetings. My guess is that you missed some of the steps, or did something wrong.

Suggestion: try to re-do the tutorial from scratch. If you still get that error, post your directory structure like @task4233 did above, and the content of all the files; and we may be able to understand what went wrong.

[reevelau]

I was doing the tutorial in $GOPATH/src making me able to call the greeting module by creating the folder structure. Instead, I should follow the instruction to work on the home directory. Thank you everyone.

[sylviankahane]

I am trying to follow the tutorial from "https://golang.org/doc/code#Workspaces" and I am getting:

hello.go:6:2: cannot find package

In no place there is a mention that a $GOPATH/src has to be created. What is more I don't find a folder named example.com/user/hello. Where I supposed to be. ?

go version go1.16.5 linux/amd64 in Ubuntu 20

[seankhliao]

@sylviankahane It doesn't need to exist, you probably missed a step

Unlike many projects, the Go project does not use GitHub Issues for general discussion or asking questions. GitHub Issues are used for tracking bugs and proposals only.

For questions please refer to https://github.com/golang/go/wiki/Questions