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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?
used_formulae = ARGV.formulae
formulae = (ARGV.include? "--installed") ? Formula.installed : Formula
recursive = ARGV.flag? "--recursive"
uses = formulae.select do |f|
used_formulae.all? do |ff|
if recursive
f.recursive_dependencies.any? { |dep| dep.name == ff.name } ||
f.recursive_requirements.any? { |req| req.name == ff.name }
else
f.deps.any? { |dep| dep.name == ff.name } ||
f.requirements.any? { |req| req.name == ff.name }
end
end
end
puts_columns uses.map(&:name)
end
end
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