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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.


@list = compression_get_list() Returns a list of supported compression methods (sorted alphabetically). compression_is_supported($comp) Returns a boolean indicating whether the give compression method is known and supported. compression_get_property($comp, $property) Returns the requested property of the compression method. Returns undef if either the property or the compression method doesn't exist. Valid properties currently include "file_ext" for the file extension, "default_level" for the default compression level, "comp_prog" for the name of the compression program and "decomp_prog" for the name of the decompression program. compression_guess_from_filename($filename) Returns the compression method that is likely used on the indicated filename based on its file extension. $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. $comp = compression_get_default() Return the default compression method. It is "xz" unless "compression_set_default" has been used to change it. compression_set_default($comp) Change the default compression method. Errors out if the given compression method is not supported. $level = compression_get_default_level() Return the default compression level used when compressing data. It's "9" for "gzip" and "bzip2", "6" for "xz" and "lzma", unless "compression_set_default_level" has been used to change it. compression_set_default_level($level) 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"). compression_is_valid_level($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 "best")


Version 1.02 (dpkg 1.17.2) New function: compression_get_file_extension_regex() Deprecated variables: $default_compression, $default_compression_level and $compression_re_file_ext Version 1.01 (dpkg 1.16.1) Default compression level is not global any more, it is per compressor type. Version 1.00 (dpkg 1.15.6) Mark the module as public.


Raphael Hertzog <hertzog@debian.org>. 1.18.4 2016-02-17 Dpkg::Compression(3)

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