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require 'formula'
# `brew uses foo bar` now returns formula that use both foo and bar
# Rationale: If you want the union just run the command twice and
# concatenate the results.
# The intersection is harder to achieve with shell tools.
module Homebrew extend self
def uses
raise FormulaUnspecifiedError if ARGV.named.empty?
uses = Formula.all.select do |f|
ARGV.formulae.all? do |ff|
# For each formula given, show which other formulas depend on it.
# We only go one level up, ie. direct dependencies.
f.deps.include? ff.name
end
end
if ARGV.include? "--installed"
uses = uses.select do |f|
keg = HOMEBREW_CELLAR/f
keg.directory? and not keg.subdirs.empty?
end
end
puts_columns uses.map{|f| f.to_s}.sort
end
end
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