Tibor Vass 250764fab8 build: fix -f handling with buildkit ...

This commit brings a more pedantic change in the following ambiguous case:
cat Dockerfile | docker build -f otherDockerfile -

The legacy builder does not error out and prefers the Dockerfile from stdin
while the buildkit-based one errors out.

Note that this is only in the case where stdin is a Dockerfile (not an archive)

Signed-off-by: Tibor Vass <tibor@docker.com>
Upstream-commit: 82f0e1e5d8
Component: cli

2018-06-13 18:32:28 +00:00

components/cli

build: fix -f handling with buildkit

2018-06-13 18:32:28 +00:00

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