populate-fully.sh: don't do anything if the repository does not exist
authorAntonio Ospite <ao2@ao2.it>
Thu, 13 Dec 2018 22:47:47 +0000 (23:47 +0100)
committerAntonio Ospite <ao2@ao2.it>
Thu, 13 Dec 2018 22:47:47 +0000 (23:47 +0100)
The pre-enter hook is called even when trying to enter an invalid
repository, vcsh only checks the repository validity later on.

Anticipate the check and avoid calling git commands on an invalid
repository as they would just fail and confuse the user.


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