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#
# find.rb: the Find module for processing all files under a given directory.
#
#
# The +Find+ module supports the top-down traversal of a set of file paths.
#
# For example, to total the size of all files under your home directory,
# ignoring anything in a "dot" directory (e.g. $HOME/.ssh):
#
# require 'find'
#
# total_size = 0
#
# Find.find(ENV["HOME"]) do |path|
# if FileTest.directory?(path)
# if File.basename(path)[0] == ?.
# Find.prune # Don't look any further into this directory.
# else
# next
# end
# else
# total_size += FileTest.size(path)
# end
# end
#
module Find
#
# Calls the associated block with the name of every file and directory listed
# as arguments, then recursively on their subdirectories, and so on.
#
# See the +Find+ module documentation for an example.
#
def find(*paths) # :yield: path
paths.collect!{|d| d.dup}
while file = paths.shift
catch(:prune) do
next unless File.exist? file
yield file.dup.taint
begin
if File.lstat(file).directory? then
d = Dir.open(file)
begin
for f in d
next if f == "." or f == ".."
if File::ALT_SEPARATOR and file =~ /^(?:[\/\\]|[A-Za-z]:[\/\\]?)$/ then
f = file + f
elsif file == "/" then
f = "/" + f
else
f = File.join(file, f)
end
paths.unshift f.untaint
end
ensure
d.close
end
end
rescue Errno::ENOENT, Errno::EACCES
end
end
end
end
#
# Skips the current file or directory, restarting the loop with the next
# entry. If the current file is a directory, that directory will not be
# recursively entered. Meaningful only within the block associated with
# Find::find.
#
# See the +Find+ module documentation for an example.
#
def prune
throw :prune
end
module_function :find, :prune
end
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