Dpkg::Compression(3perl) libdpkg-perl Dpkg::Compression(3perl)
NAME
Dpkg::Compression - simple database of available compression methods
DESCRIPTION
This modules provides a few public functions and a public regex to
interact with the set of supported compression methods.
FUNCTIONS
@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")
CHANGES
Version 2.00 (dpkg 1.20.0)
Hide variables: $default_compression, $default_compression_level and
$compression_re_file_ext.
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.
1.21.1 2024-02-23 Dpkg::Compression(3perl)
Generated by dwww version 1.14 on Mon Feb 3 11:39:29 CET 2025.