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| H A D | build-unit-test-docker | 50837436 Sat Feb 06 12:24:05 CST 2021 Patrick Williams <patrick@stwcx.xyz> build-unit-test-docker: invalidate base image weekly
Docker will cache an image built with the exact same commands,
so we only get latest Ubuntu packages rarely. Add a date-based
echo command into the early stages of the base image build so
that we regularly get updates to all the packages in the base
image.
This invalidation, via echo, is only performed when running under
a Jenkins-like context. The purpose of this distinction is so that
we are more likely to cache failures induced by an underlying OS
update in CI, but when developers run this script locally they rarely
see an invalidation that is not due to a code package update.
Add an environment variable option "FORCE_DOCKER_BUILD" which can be
set by developers to bypass the Docker cache and force all images
to be rebuilt, just in case they really want to do that sort of thing.
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iec92ebada513975d0806099083384dfca623f144
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