Jamie Tanna 826541b266 fix(datasource/go): don't cache private modules (#45949)
Previously, we were caching private Go modules' information, even when
`cachePrivatePackages=false`.

This leads to the module path, versions, and possibly the `go`
directive being cached unintentionally.

Instead of doing so, we should make sure that we're intentionally
caching packages.

To do this, we can use a mix of the `GOPRIVATE`/`GONOPROXY` to determine
which packages shouldn't be fetched in the public Go proxy, given
they're private, following how the Go toolchain itself does this.

When interacting with the public Go proxy, we treat these packages as
public (as the public Go proxy has no means to authenticate) and so
anything outside of this should be treated as private.

When `GOPROXY` contains `direct`, we only treat a package as public only
when the public proxy is in the list too, the way Go's own default is
written. This is used to imply that `direct` is the fallback for
whatever the public proxy doesn't have.

When thre is no Go proxy set, `GOPROXY=direct` means everything comes
from source, which tells us nothing about who is allowed to read it.

This doesn't catch everything: with the default `GOPROXY`, a private
package the public proxy doesn't have falls through to `direct` and is
still cached by Renovate, unless `GOPRIVATE` says otherwise. We only
learn that no proxy served it after we've fetched it, which is after
`cacheable` is determined.

When using Renovate with a private Go proxy mirror, such as Artifactory,
this will result in no cached packages until `cachePrivatePackages:
true` is set.

This is a similar change to #45348.

Co-authored-by: Claude Opus 5 <jamie.tanna+claude-code@mend.io>
2026-09-14 16:39:36 +00:00
2017-01-15 17:23:34 +01:00
2022-02-04 20:29:47 +01:00
2024-03-14 13:48:17 +00:00
2026-05-09 07:13:04 +00:00

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