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Greatly simplify the implementation of brew-leaves

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This commit is contained in:
Jack Nagel 2013-11-16 14:10:23 -06:00
parent d1cfd02e27
commit 6eef992741
1 changed files with 6 additions and 19 deletions
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25
Library/Contributions/cmd/brew-leaves.rb
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@ -3,25 +3,12 @@
# See: http://github.com/mxcl/homebrew/issues/issue/1438
require 'formula'
require 'set'
def get_used_by(formulae)
used_by = {}
formulae.each do |f|
f.deps.each do |dep|
_deps = used_by[dep.to_s] || []
_deps << f.name unless _deps.include? f.name
used_by[dep.to_s] = _deps
end
end
deps_of_installed = Set.new
return used_by
end
installed = Formula.installed
names = installed.map(&:name)
deps_graph = get_used_by(installed)
names.each do |name|
deps = deps_graph[name] || []
puts name unless deps.any? { |dep| names.include? dep.to_s }
Formula.installed.each do |f|
deps_of_installed.merge f.deps.map(&:name)
end.each do |f|
puts f.name unless deps_of_installed.include? f.name
end