Formatting all elm files in a directory

[avh4]

elm-format src (src is a directory) should format all *.elm files found (recursively) in the given directory.

Using --output FILE with a directory should exit with an error message.

The following prompt should be given (unless --yes is specified):

This will overwrite the following 4 files to use Elm’s preferred style:

  src/TodoMVC.elm
  src/TodoMVC/Model.elm
  src/TodoMVC/Update.elm
  src/TodoMVC/View.elm

This cannot be undone! Make sure to back up these files before proceeding.

Are you sure you want to overwrite these files with formatted versions? (y/N)

[Janiczek]

What should be the behaviour when you have eg. 3 .elm files and the first one has compiler errors in it?

• print something, exitFailure (leaving the remaining files as are)
• print something, and continue parsing the rest of the files?

[avh4]

I'd say do the simplest option that seems technically correct to you, and open a new issue to discuss whether we want to handle it in a more complicated way.

[avh4]

Fixed in #41