Lazily initialize docker registry client #328
Merged
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This PR allows running bob without errors if:
bob build ls
) does not require interaction with docker.If the bobfile requires docker for some operation, and docker is not present, then it exits early with a user error, without showing a stacktrace.
It also addresses a potential mutex bug (Unlock was not deferred and there was no unlock call in an if-return branch later on).
It should address issues reported by users not having Docker installed, e.g. #327