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module Gitlab
##
# Class that represents a simplified path to a file or directory
#
# This is IO-operations safe class, that does similar job to
# Ruby's Pathname but without the risk of accessing filesystem.
#
# TODO, better support for '../' and './'
#
class StringPath
attr_reader :path, :universe
def initialize(path, universe)
@path = prepare(path)
@universe = Set.new(universe.map { |entry| prepare(entry) })
@universe.add('./')
end
def to_s
@path
end
def absolute?
@path.start_with?('/')
end
def relative?
!absolute?
end
def directory?
@path.end_with?('/')
end
def file?
!directory?
end
def has_parent?
@universe.include?(@path.sub(basename, ''))
end
def parent
return nil unless has_parent?
new(@path.sub(basename, ''))
end
def basename
directory? ? name + ::File::SEPARATOR : name
end
def name
@path.split(::File::SEPARATOR).last
end
def has_descendants?
descendants.any?
end
def descendants
return [] unless directory?
children = @universe.select { |entry| entry =~ /^#{@path}.+/ }
children.map { |path| new(path) }
end
def children
return [] unless directory?
return @children if @children
children = @universe.select { |entry| entry =~ %r{^#{@path}[^/]+/?$} }
@children = children.map { |path| new(path) }
end
def directories
return [] unless directory?
children.select(&:directory?)
end
def directories!
has_parent? ? directories.prepend(new(@path + '../')) : directories
end
def files
return [] unless directory?
children.select(&:file?)
end
def ==(other)
@path == other.path && @universe == other.universe
end
def inspect
"#{self.class.name}: #{@path}"
end
private
def new(path)
self.class.new(path, @universe)
end
def prepare(path)
return path if path =~ %r{^(/|\.|\.\.)}
path.dup.prepend('./')
end
end
end
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