--build-arg behavior differs from docker build #113
Description
With the docker CLI, --build-arg FOO will pass the value of $FOO to the build arg. If FOO is unset then no value is passed.
With buildx an empty string is always set.
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With the docker CLI, --build-arg FOO will pass the value of $FOO to the build arg. If FOO is unset then no value is passed.
With buildx an empty string is always set.