--projects should filter by directory

[ericclemmons]

Do you want to request a feature or report a bug?

Bug.

What is the current behavior?

Jest incorrectly processes files instead of only the folders within them.

$ jest --projects packages/*
/Users/eric/Projects/my/project/packages/README.md:1
(function (exports, require, module, __filename, __dirname) { # My Project
                                                              ^

SyntaxError: Invalid or unexpected token

What is the expected behavior?

Filter by .isDirectory().

Please provide your exact Jest configuration and mention your Jest, node,
yarn/npm version and operating system.

jest@22.0.4
yarn@1.3.2
node@8.9.1

[ndelangen]

Would I be correct in implementing this filtering here:
https://github.com/facebook/jest/blob/a43977281802b192b6cdb57a1dc806bdf42169d1/packages/jest-cli/src/cli/index.js#L253

[SimenB]

@ndelangen yeah

[SimenB]

I'm not sure it's correct though, you should be able to pass a config file directly

[ericclemmons]

See #5412.

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