Is there a way to get ALL packages and dependencies of Go programs in a given directory and its subdirectories using Go standard tooling?

Question

I have a large directory of Go packages which is actually my $GOPATH/src directory. I am trying to get a list of all packages (and their versions eventually if possible, but even names would be a nice start) within all subdirectories of that directory recursively (including the vendor directories). When I run go list all ./... in $GOPATH/src, I get a bunch of messages saying:

code in directory [foo] expects import [bar]

However, if I navigate to the individual package working directories, it seems to work. I am also not sure why it actually does find the packages in the above command, but displays that error, which it does not display when I navigate down to each package's directory. Is there a way to specify such a recursive lookup using the Go toolset?

Answer 1

I am also not sure why it actually does find the packages in the above command, but displays that error, which it does not display when I navigate down to each package's directory

That seems to be the consequence of src/cmd/go/internal/load/pkg.go

        if !cfg.ModulesEnabled && data.err == nil &&
            data.p.ImportComment != "" && data.p.ImportComment != path &&
            !strings.Contains(path, "/vendor/") && !strings.HasPrefix(path, "vendor/") {
            data.err = fmt.Errorf("code in directory %s expects import %q", data.p.Dir, data.p.ImportComment)
        }

In a non-module-enabled project, with vendor/ packages, you would get that error (as opposed to the same command run inside the vendor folder, which would not trigger the condition shown above)