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# In GOPATH mode, module legacy support does path rewriting very similar to vendoring.
env GO111MODULE=off
go list -f '{{range .Imports}}{{.}}{{"\n"}}{{end}}' old/p1
stdout ^new/p1$
go list -f '{{range .Imports}}{{.}}{{"\n"}}{{end}}' new/p1
stdout ^new/p2$ # not new/v2/p2
! stdout ^new/v2
stdout ^new/sub/x/v1/y$ # not new/sub/v2/x/v1/y
! stdout ^new/sub/v2
stdout ^new/sub/inner/x # not new/sub/v2/inner/x
go build old/p1 new/p1
-- new/go.mod --
module "new/v2"
-- new/new.go --
package new
import _ "new/v2/p2"
-- new/p1/p1.go --
package p1
import _ "old/p2"
import _ "new/v2"
import _ "new/v2/p2"
import _ "new/sub/v2/x/v1/y" // v2 is module, v1 is directory in module
import _ "new/sub/inner/x" // new/sub/inner/go.mod overrides new/sub/go.mod
-- new/p2/p2.go --
package p2
-- new/sub/go.mod --
module new/sub/v2
-- new/sub/inner/go.mod --
module new/sub/inner
-- new/sub/inner/x/x.go --
package x
-- new/sub/x/v1/y/y.go --
package y
-- old/p1/p1.go --
package p1
import _ "old/p2"
import _ "new/p1"
import _ "new"
-- old/p2/p2.go --
package p2