[6.0.0] Keep credentials cached across build commands. #16881
Merged
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When using a credential helper, the lifetime of the credential cache is currently tied to an individual command, which causes the helper to be called for every command resulting in poor incremental build latency for builds using a non-trivial helper.
Since the cache must be shared by RemoteModule and BazelBuildServiceModule, I've introduced a new CredentialModule whose sole purpose is to provide access to it.
Closes #16822.
PiperOrigin-RevId: 491598103
Change-Id: Ib668954b635a0e9498f0a7418707d6a2dfae0265