cmd/go: go get -u fails with local-only replacements

[kenichi-fukushima]

Please answer these questions before submitting your issue. Thanks!

What did you do?

Run go get -u in a module with replace with a local module.

You can reproduce the problem by checking out this repository and run the command in depending directory.
https://github.com/kenichi-fukushima/go-local-modules

What did you expect to see?

The command finishes successfully.

What did you see instead?

The command failed with this message.

go get: upgrading example.com/depended@v0.0.0: unrecognized import path "example.com/depended" (parse https://example.com/depended?go-get=1: no go-import meta tags ())

System details

I got this error with 12.2/12.5 on Linux too.

go version go1.12.6 darwin/amd64
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/keni/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/keni/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/keni/Downloads/go-local-modules-master/depending/go.mod"
GOROOT/bin/go version: go version go1.12.6 darwin/amd64
GOROOT/bin/go tool compile -V: compile version go1.12.6
uname -v: Darwin Kernel Version 18.2.0: Thu Dec 20 20:46:53 PST 2018; root:xnu-4903.241.1~1/RELEASE_X86_64
ProductName:	Mac OS X
ProductVersion:	10.14.3
BuildVersion:	18D109
lldb --version: lldb-1000.0.38.2
  Swift-4.2

[bcmills]

Coincidentally, @jayconrod and I also noticed that this is broken in the context of https://golang.org/cl/180337.

Any fix is probably too invasive for 1.13, but we're planning to overhaul replacements in general for 1.14.

[pablote]

Hi, any fix or workaround for this? Testing this out with go 1.14.1 on darwin. I was usually able to update all dependencies with go get -u ./..., but since we moved to a monorepo and using replace in go.mod files this is now failing, it seems to be trying to fetch the replaced dependencies repo online.

On the other hand, updating specific dependencies go get some-dep@someversion works.

[pablote]

Not the best workaround in the world, but I just found that if replaced dependencies are temporarily removed from go.mod, then go get -u ./... actually updates the rest of the dependencies. It still prints some errors on the console, but it works.

[microo8]

All of the private modules I use are just in a fictional mycompany.com/somemodule.

So I tried to add the fictional domain to GOPRIVATE with:
go env -w GOPRIVATE=mycompany.com

and then run go get -u all
But it fails with go get all: unrecognized import path "mycompany.com/common/utils": reading https://mycompany.com/common/utils?go-get=1: 404 Not Found

Is it possible, that go get -u all ignores the environment variables? (GOPRIVATE,GONOPROXY,GONOSUMDB)

[jayconrod]

@microo8 This issue is specifically related to local replacements. It sounds like you're running into a different problem with private modules so please open a new issue instead.

(go get does not ignore those environment variables. Please make sure that there is a server at that URL resolving module paths to repository URLs or make sure module paths end with .git.)

[microo8]

I have the private modules replaced with a local module

module mycompany.com/clientname/server

go 1.14

require (
    github.com/lib/pq v1.7.0
    github.com/99designs/gqlgen v0.11.3
    github.com/vektah/gqlparser/v2 v2.0.1
    golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
    mycompany.com/clientname/models v0.0.0-00010101000000-000000000000
    mycompany.com/common/utils v0.0.0-00010101000000-000000000000
)

replace mycompany.com/common/utils => ../../common/utils

replace mycompany.com/clientname/models => ../models

and that doesn't work. the mycompany.com is just fictional, there isn't a server on the url

go get -u all finds the new versions of the github.com modules and then fails with go get all: unrecognized import path "mycompany.com/common/utils": reading https://mycompany.com/common/utils?go-get=1: 404 Not Found an doesn't update go.mod

[jayconrod]

@microo8 Thanks for that example. It does seem to be the same issue described here.

The error is reported because the go command is attempting to find a VCS repository for a module path (mycompany.com/common/utils). The module path is replaced with a local directory, so it's a bug that it's doing that.

[microo8]

So I report the bug in a new issue. Thanks