ilovezfs 4c1e415bff haskell: fix empty flags build failures
Fixes a regression introduced by Homebrew/homebrew#47950 in 9e3ee3e causing build
failures with the error

  cabal: The file does not exist ''.

This will occur whenever the optional :flags key isn't in the options
hash passed to install_cabal_package.

Closes Homebrew/homebrew#49425.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
2016-02-22 16:16:50 +00:00
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Homebrew's Formula API

This is the (partially) documented public API for Homebrew.

The main class you should look at is the {Formula} class (and classes linked from there). That's the class that's used to create Homebrew formulae (i.e. package descriptions). Assume anything else you stumble upon is private.

You may also find the Formula Cookbook and Ruby Style Guide helpful in creating formulae.

Good luck!