x/build: clean download fails

[kevinburke]

Please answer these questions before submitting your issue. Thanks!

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

Tip, though I'm also able to reproduce on Go 1.8

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

Mac or Linux

What did you do?

For some reason there's a problem with the go4.org package root.

rm -rf $GOPATH/src/go4.org
go get golang.org/x/build/...

What did you expect to see?

I expected the program to check out and compile

What did you see instead?

The following error:

$ go get golang.org/x/build/...
package go4.org/syncutil: /Users/kevin/src/go4.org exists but /Users/kevin/src/go4.org/.git does not - stale checkout?
package go4.org/types: cannot find package "go4.org/types" in any of:
	/Users/kevin/go/src/go4.org/types (from $GOROOT)
	/Users/kevin/src/go4.org/types (from $GOPATH)

See related Travis builds, which you should be able to use to verify a patch as well.

https://travis-ci.org/kevinburke/build/jobs/234034579

Here's the travis.yml file I'm using: https://github.com/kevinburke/build/blob/travis/.travis.yml

[kevinburke]

Here's the verbose output from go get:

$ go get -v golang.org/x/build/...
Fetching https://go4.org/grpc?go-get=1
Parsing meta tags from https://go4.org/grpc?go-get=1 (status code 200)
get "go4.org/grpc": found meta tag get.metaImport{Prefix:"go4.org/grpc", VCS:"git", RepoRoot:"https://github.com/go4org/grpc"} at https://go4.org/grpc?go-get=1
go4.org/grpc (download)
Fetching https://go4.org/syncutil?go-get=1
Parsing meta tags from https://go4.org/syncutil?go-get=1 (status code 200)
get "go4.org/syncutil": found meta tag get.metaImport{Prefix:"go4.org", VCS:"git", RepoRoot:"https://github.com/camlistore/go4"} at https://go4.org/syncutil?go-get=1
get "go4.org/syncutil": verifying non-authoritative meta tag
Fetching https://go4.org?go-get=1
Parsing meta tags from https://go4.org?go-get=1 (status code 200)
go4.org (download)
package go4.org/syncutil: /Users/kevin/src/go4.org exists but /Users/kevin/src/go4.org/.git does not - stale checkout?
Fetching https://go4.org/types?go-get=1
Parsing meta tags from https://go4.org/types?go-get=1 (status code 200)
get "go4.org/types": found meta tag get.metaImport{Prefix:"go4.org", VCS:"git", RepoRoot:"https://github.com/camlistore/go4"} at https://go4.org/types?go-get=1
get "go4.org/types": verifying non-authoritative meta tag
package go4.org/types: cannot find package "go4.org/types" in any of:
	/Users/kevin/go/src/go4.org/types (from $GOROOT)
	/Users/kevin/src/go4.org/types (from $GOPATH)

[kevinburke]

Once I get in that state, all further package downloads fail

$ go get go4.org/types
package go4.org/types: /Users/kevin/src/go4.org exists but /Users/kevin/src/go4.org/.git does not - stale checkout?

[bradfitz]

I put go4.org/grpc in its own git repo, separate from go4.org/...

I guess cmd/go doesn't like that.

[bradfitz]

FWIW, it "works" if you go get go4.org/ANYTHINGELSE before go4.org/grpc.

[bradfitz]

I'm going to consider this effectively a dup of #26872 (migrating x/build to using modules).

We'll be better at monitoring & testing deps after that.

[dmitshur]

@bradfitz I think this is closer to being a dup of go4org/go4#30, which has been resolved a year ago.

Edit: FWIW, x/build builds cleanly right now:

$ export GOPATH=/tmp/empty
$ go get golang.org/x/build/...
$