drop Go 1.16, add Go 1.18 #158
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While here, bump gotip and the action versions.
| @@ -1,5 +1,5 @@ | |||
| module github.com/rogpeppe/go-internal | |||
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| go 1.16 | |||
| go 1.17 | |||
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Could we leave support for go1.16 until we actually require go1.17 features?
I suspect there are a bunch of people still using 1.16 out there.
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Is that a policy we want to enforce going forward? We didn't support Go 1.15 when 1.17 was the latest version, so what you say would be a change - supporting 3 major versions rather than 2. I personally think it's unnecessary at this point, given that 1.18 has been out for three months and 1.16.x has been unsupported upstream for a while too :)
Worth noting that bumping this version here doesn't preclude building on 1.16; in fact it should continue to work until we actually do start using new features/APIs. But more than anything, it's a signal that we only test and explicitly support 1.16 or later.
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I reckon that it's nicer to keep support for a given version until we need to drop it tbh. Is there any significant cost to us doing so?
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No immediate cost, but CI does get slower the more versions we support, and we do have shenanigans like dealing with the signature of testing.MainStart for example. We have 6 CI jobs and we'd likely jump to 9.
If we want to change the supported version policy that's fine with me, I just wasn't aware that was your intention. Either way, I'll leave it to you to wrap up this PR however you see fit, because I don't have strong opinions either way :)
(see commit message)