cmd/internal/moddeps: set GO111MODULE explicitly for moddeps_test 'go' commands

This fixes observed failures using the following steps to reproduce:

	go env -w GO111MODULE=off
	go test cmd/internal/moddeps

Fixes #37749

Change-Id: I7761f0b20266ac911ad19a724ba2551beca3f267
Reviewed-on: https://go-review.googlesource.com/c/go/+/222674
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>

diff --git a/src/cmd/internal/moddeps/moddeps_test.go b/src/cmd/internal/moddeps/moddeps_test.go
index d544a4d8dfaeca5ae6ad10d495b21d12de029e7c..b6fd92438e21653bba7fe800d042290dc00c82b1 100644 (file)
--- a/src/cmd/internal/moddeps/moddeps_test.go
+++ b/src/cmd/internal/moddeps/moddeps_test.go
@@ -47,6 +47,7 @@ func findGorootModules(t *testing.T) []gorootModule {
                        // Use 'go list' to describe the module contained in this directory (but
                        // not its dependencies).
                        cmd := exec.Command(goBin, "list", "-json", "-m")
+                       cmd.Env = append(os.Environ(), "GO111MODULE=on")
                        cmd.Dir = dir
                        cmd.Stderr = new(strings.Builder)
                        out, err := cmd.Output()
@@ -103,6 +104,7 @@ func TestAllDependenciesVendored(t *testing.T) {
                                // dependencies are vendored. If any imported package is missing,
                                // 'go list -deps' will fail when attempting to load it.
                                cmd := exec.Command(goBin, "list", "-mod=vendor", "-deps", "./...")
+                               cmd.Env = append(os.Environ(), "GO111MODULE=on")
                                cmd.Dir = m.Dir
                                cmd.Stderr = new(strings.Builder)
                                _, err := cmd.Output()
@@ -115,7 +117,8 @@ func TestAllDependenciesVendored(t *testing.T) {
 
                        // There is no vendor directory, so the module must have no dependencies.
                        // Check that the list of active modules contains only the main module.
-                       cmd := exec.Command(goBin, "list", "-m", "all")
+                       cmd := exec.Command(goBin, "list", "-mod=mod", "-m", "all")
+                       cmd.Env = append(os.Environ(), "GO111MODULE=on")
                        cmd.Dir = m.Dir
                        cmd.Stderr = new(strings.Builder)
                        out, err := cmd.Output()