Globs fail to trigger warning about missing trailing slashes on COPY

[mcandre]

I get warnings when explicitly listing out multiple files to COPY. However, when using glob patterns, e.g. Gemfile*, then dockerfile-utils does not present a warning, even though globs may expand to multiple files.

[rcjsuen]

I get warnings when explicitly listing out multiple files to COPY.

@mcandre Thank you for the bug report.

Which warnings are you referring to? Could you please provide a Dockerfile so I can see the exact error you are hitting? Thanks!