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module Bundler
class Resolver
def self.resolve(requirements, index = Gem.source_index)
result = catch(:success) do
new(index).resolve(requirements, {})
end
result && result.values
end
def initialize(index)
@index = index
end
def resolve(reqs, activated)
return activated if reqs.empty?
reqs = reqs.sort_by {|dep| @index.search(dep).size }
activated = activated.dup
current = reqs.shift
if existing = activated[current.name]
if current.version_requirements.satisfied_by?(existing.version)
resolve(reqs, activated)
end
else
specs = @index.search(current)
specs.reverse!
specs.each do |spec|
activated[spec.name] = spec
new_reqs = reqs + spec.dependencies.select do |d|
d.type != :development
end
retval = resolve(new_reqs, activated)
throw :success, retval if retval
end
nil
end
end
end
end
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