automation: add check that hg source directory is a repo

Authored by indygreg.

Description

automation: add check that hg source directory is a repo

Synchronizing from e.g. source distributions is not yet supported.
Let's add a check so we fail with an error message indicating
such.

Differential Revision: https://phab.mercurial-scm.org/D6315

Details

Committed
indygregApr 19 2019, 11:21 AM
Differential Revision
D6315: automation: add check that hg source directory is a repo
Parents
rHGe570106beda1: automation: shore up rebooting behavior
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