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cmd/internal/moddeps: use -mod=readonly instead of -mod=mod
TestAllDependencies is attempting to check that the modules in GOROOT satisfy certain properties; it should not modify those modules itself. The “quick” part of the test checks that vendored packages are present and complete, without constructing a parallel GOROOT. It shouldn't resolve new dependencies or change formatting in any way. The longer version of the test already constructs a parallel GOROOT and tidies the modules within it. That part of the test will flag any modifications needed to the go.mod and go.sum files, without modifying the original GOROOT. From what I can tell, the failure mode in #46695 is caused by running the test on a module rooted in $GOROOT proper. There is no such module in the mainline Go repo, but it may have been introduced in the fork and could also be introduced by stray edits in contributor CLs. It should be diagnosed clearly. For #46695 Change-Id: I62b90ccbd54cb3e3b413017021c952a7b1d455e7 Reviewed-on: https://go-review.googlesource.com/c/go/+/328770 Trust: Bryan C. Mills <bcmills@google.com> Run-TryBot: Bryan C. Mills <bcmills@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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@ -68,7 +68,7 @@ func TestAllDependencies(t *testing.T) {
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// There is no vendor directory, so the module must have no dependencies.
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// Check that the list of active modules contains only the main module.
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cmd := exec.Command(goBin, "list", "-mod=mod", "-m", "all")
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cmd := exec.Command(goBin, "list", "-mod=readonly", "-m", "all")
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cmd.Env = append(os.Environ(), "GO111MODULE=on")
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cmd.Dir = m.Dir
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cmd.Stderr = new(strings.Builder)
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