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I'm writing a homebrew formula for a project (https://www.cryfs.org). Since it is a file system, it depends on osxfuse, which is unfortunately only available as a cask. That is, the formula should have the cask as a dependency.
I tried the following
depends_on :cask => "osxfuse"
but I got the error message
Unsupported special dependency :cask
What is the syntax for adding casks as dependencies to a formula?
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Homebrew-Cask is an extension to Homebrew to install GUI applications such as Google Chrome or Atom. It started independently but its maintainers now work closely with Homebrew's core team. Homebrew calls its package definition files “formulae” (British plural for “formula”). Homebrew-Cask calls them “casks”.
CASK – Cost of Available Seat Kilometer is used to measure the unit cost expressed in cash value to operate each seat for every kilometre. The lower the CASK value would mean that it's easier to earn revenue. To get the CASK, direct operational cost is divided by the available seat per kilometre.
Homebrew Formulae is an online package browser for Homebrew – the macOS (and Linux) package manager. For more information on how to install and use Homebrew see our homepage.
Homebrew-Cask extends Homebrew and allows you to install large binary files via a command-line tool. You can for example install applications like Google Chrome, Dropbox, VLC and Spectacle. No more downloading . dmg files and dragging them to your Applications folder!
Couldn't find an answer to this problem either.
But as a poor mans workaround this serves well for the time being:
def install
# Resolve cask dependencies
system "/usr/local/bin/brew", "cask", "install", "osxfuse"
The big disadvantage is obvious, its not a so much of dependency relation than an installation command. Which may lead to problems until you actually install the package.
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