The traditional approach to installing the dependencies of a formula is
the following:
brew install `brew deps formula`
This approach ignores any options that are specified in the parent
formula. This pull request adds a --only-dependencies option to brew
install that installs the dependencies of a formula with optional flags,
but returns before installing the parent formula.
ClosesHomebrew/homebrew#25272.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>
b524943226