Perhaps the most idiomatic way of achieving this is:
GOBIN=$PWD go install ./cmd/{foo,bar}
go install is also more efficient than go build because it will only
perform the link step if the target is out of date.
I'm no expert with make, so I don't know how this sort of approach
maps back onto make.
Returning however to the problem you're seeing with your existing
setup, a change in Go 1.12 should prevent the race condition you're
seeing:
https://go-review.googlesource.com/c/go/+/146380
On Fri, 18 Jan 2019 at 01:41, Tycho Andersen <ty...@tycho.ws> wrote:
>
> Hi everyone,
>
> I'm trying to get an existing project which outputs multiple binaries
> to work with go modules. The package follows roughly the recommended
> layout: https://github.com/golang-standards/project-layout
>
> That is, it looks like
>
> /go.mod
> /go.sum
> /code.go
> /cmd/foo/main.go
> /cmd/bar/main.go
>
> I have a top level make file that looks roughly like:
>
> all: foo bar
>
> foo: ...
> go build -o foo ./cmd/foo/...
>
> bar: ...
> go build -o bar ./cmd/bar/...
>
> When I type "make", it seems like go.sum and go.mod end up with only
> bar's dependencies, because the last go invocation prunes the "unused"
> dependencies from the module files. I've tried various ways of using
> mutiple go.mod and go.sum files (one in each binary directory), but I
> can't quite get the includes of the top level package right.
>
> I see https://github.com/golang/go/issues/14295, which will solve this
> problem for me, but it doesn't exist yet.
>
> Is there some clever way of structuring a project like this with go
> modules that I haven't figured out yet?
>
> Thanks,
>
> Tycho
>
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