Dpkg::Compression man page on ElementaryOS

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Dpkg::Compression(3)		 libdpkg-perl		  Dpkg::Compression(3)

       Dpkg::Compression - simple database of available compression methods

       This modules provides a few public funcions and a public regex to
       interact with the set of supported compression methods.

       my @list = compression_get_list()
	   Returns a list of supported compression methods (sorted

	   Returns a boolean indicating whether the give compression method is
	   known and supported.

       compression_get_property($comp, $property)
	   Returns the requested property of the compression method. Returns
	   undef if either the property or the compression method doesn't
	   exist. Valid properties currently include "file_ext" for the file
	   extension, "default_level" for the default compression level,
	   "comp_prog" for the name of the compression program and
	   "decomp_prog" for the name of the decompression program.

	   Returns the compression method that is likely used on the indicated
	   filename based on its file extension.

       my $regex = compression_get_file_extension_regex()
	   Returns a regex that matches a file extension of a file compressed
	   with one of the supported compression methods.

       my $comp = compression_get_default()
	   Return the default compression method. It's "gzip" unless
	   "compression_set_default" has been used to change it.

	   Change the default compression method. Errors out if the given
	   compression method is not supported.

       my $level = compression_get_default_level()
	   Return the default compression level used when compressing data.
	   It's "9" for "gzip" and "bzip2", "6" for "xz" and "lzma", unless
	   "compression_set_default_level" has been used to change it.

	   Change the default compression level. Passing undef as the level
	   will reset it to the compressor specific default, otherwise errors
	   out if the level is not valid (see "compression_is_valid_level").

	   Returns a boolean indicating whether $level is a valid compression
	   level (it must be either a number between 1 and 9 or "fast" or

   Version 1.02
       New function: compression_get_file_extension_regex()

       Deprecated variables: $default_compression, $default_compression_level
       and $compression_re_file_ext

   Version 1.01
       Default compression level is not global any more, it is per compressor

       Raphaƫl Hertzog <hertzog@debian.org>.

1.17.5				  2013-12-10		  Dpkg::Compression(3)

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