Cirrus: Fix gate task + make lint|validate

A recent Makefile change (4ec893a748) removed a side-effect necessary
for 'make validation' to pass under automation.  Making things worse,
change 12bd7e927c was found upon investigation to always point at
the latest upstream HEAD.  However, this is rarely a fork-point for
pull-requests.  Further investigation showed the built-in Cirrus-CI,
golang-based git does not obtain sufficient data for the Makefile
command `git merge-base HEAD $${DEST_BRANCH:-master}` to function
properly (in the context of the gate container).

Fix this by customizing the clone operation and slightly adjust the
Makefile command to function as intended in the gate container.  Also
add checks to the validate and lint targets which validate the
variable EPOCH_TEST_COMMIT value is never an empty string or whitespace.

Signed-off-by: Chris Evich <cevich@redhat.com>

0 files changed, 0 insertions, 0 deletions