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require 'formula'
# `brew uses foo bar` returns formulae that use both foo and bar
# If you want the union, 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?
formulae = ARGV.formulae
uses = Formula.select do |f|
formulae.all? do |ff|
if ARGV.flag? '--recursive'
f.recursive_dependencies.any? { |dep| dep.name == ff.name }
else
f.deps.any? { |dep| dep.name == ff.name }
end
end
end
if ARGV.include? "--installed"
uses = uses.select { |f| Formula.installed.include? f }
end
puts_columns uses.map(&:to_s).sort
end
end
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