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cmd/go/internal/modfetch: always allow Stat for the current toolchain to succeed

This fixes a failure mode observed in TestScript/gotoolchain_version
when building go1.21rc3.

Updates #61259.

Change-Id: Ifb14a5b94b687adea7a26c1155591e3ae75b7a62
Reviewed-on: https://go-review.googlesource.com/c/go/+/509217
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
This commit is contained in:
Bryan C. Mills 2023-07-13 10:12:33 -04:00 committed by Gopher Robot
parent d4f0d896a6
commit b88bd917b8

View File

@ -98,13 +98,23 @@ func (r *toolchainRepo) Stat(ctx context.Context, rev string) (*RevInfo, error)
if !gover.IsValid(v) {
return nil, fmt.Errorf("invalid %s version %s", r.path, rev)
}
// If we're asking about "go" (not "toolchain"), pretend to have
// all earlier Go versions available without network access:
// we will provide those ourselves, at least in GOTOOLCHAIN=auto mode.
if r.path == "go" && gover.Compare(v, gover.Local()) <= 0 {
return &RevInfo{Version: prefix + v}, nil
}
// Similarly, if we're asking about *exactly* the current toolchain,
// we don't need to access the network to know that it exists.
if r.path == "toolchain" && v == gover.Local() {
return &RevInfo{Version: prefix + v}, nil
}
if gover.IsLang(v) {
// We can only use a language (development) version if the current toolchain
// implements that version, and the two checks above have ruled that out.
return nil, fmt.Errorf("go language version %s is not a toolchain version", rev)
}