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# find.rb: the Find module for processing all files under a given directory.

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#

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#

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# The +Find+ module supports the top-down traversal of a set of file paths.

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#

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# For example, to total the size of all files under your home directory,

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# ignoring anything in a "dot" directory (e.g. $HOME/.ssh):

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#

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# require 'find'

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#

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# total_size = 0

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#

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# Find.find(ENV["HOME"]) do |path|

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# if FileTest.directory?(path)

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# if File.basename(path)[0] == ?.

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# Find.prune # Don't look any further into this directory.

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# else

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# next

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# end

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# else

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# total_size += FileTest.size(path)

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# end

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# end

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#

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module Find

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#

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# Calls the associated block with the name of every file and directory listed

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# as arguments, then recursively on their subdirectories, and so on.

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#

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# See the +Find+ module documentation for an example.

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#

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def find(*paths) # :yield: path

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paths.collect!{|d| d.dup}

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while file = paths.shift

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catch(:prune) do

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yield file.dup.taint

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next unless File.exist? file

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begin

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if File.lstat(file).directory? then

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d = Dir.open(file)

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begin

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for f in d

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next if f == "." or f == ".."

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if File::ALT_SEPARATOR and file =~ /^(?:[\/\\]|[A-Za-z]:[\/\\]?)$/ then

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f = file + f

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elsif file == "/" then

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f = "/" + f

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else

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f = File.join(file, f)

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end

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paths.unshift f.untaint

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end

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ensure

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d.close

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end

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end

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rescue Errno::ENOENT, Errno::EACCES

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end

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end

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end

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end

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#

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# Skips the current file or directory, restarting the loop with the next

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# entry. If the current file is a directory, that directory will not be

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# recursively entered. Meaningful only within the block associated with

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# Find::find.

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#

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# See the +Find+ module documentation for an example.

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#

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def prune

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throw :prune

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end

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module_function :find, :prune

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end

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