x/build/cmd/release: darwin/arm64 installer prompts for installing Rosetta 2

[usmannajib]

What version of Go are you using (go version)?

1.16beta1

$ go version

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

MacOS Big Sur on arm64 M1

go env Output

$ go env

What did you do?

Ran installation

What did you expect to see?

The installer should have installed Go in native M1 mode.

What did you see instead?

The installer asked for Rosetta to be installed as a mandatory install dependency.

[cherrymui]

Just to be sure, is https://golang.org/dl/go1.16beta1.darwin-arm64.pkg the installer you used?

cc @dmitshur

[usmannajib]

Yes take a look at the screenshot below

[dmitshur]

Thanks for reporting. Perhaps there's some configuration in the installer causing macOS to think Rosetta will be needed, when that shouldn't be the case. We'll take a look.

After installing, does go version output end with "darwin/arm64"?
Also, what macOS version did you test with?

[dmitshur]

The problem may be that we're not including a hostArchitectures property in the installer Distribution options:

$ pkgutil --expand go1.16beta1.darwin-arm64.pkg out
$ cat out/Distribution | grep options
    <options customize="never" allow-external-scripts="no"/>

It likely needs to be set to a value that includes arm64:

<options hostArchitectures="arm64" customize="never" allow-external-scripts="no"/>

CC @golang/release, @markmentovai.