Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
Module::Metadata(3)    Perl Programmers	Reference Guide	   Module::Metadata(3)

       Module::Metadata	- Gather package and POD information from perl module

       version 1.000037

	 use Module::Metadata;

	 # information about a .pm file
	 my $info = Module::Metadata->new_from_file( $file );
	 my $version = $info->version;

	 # CPAN	META 'provides'	field for .pm files in a directory
	 my $provides =	Module::Metadata->provides(
	   dir => 'lib', version => 2

       This module provides a standard way to gather metadata about a .pm file
       through (mostly)	static analysis	and (some) code	execution.  When
       determining the version of a module, the	$VERSION assignment is
       "eval"ed, as is traditional in the CPAN toolchain.

   "new_from_file($filename, collect_pod => 1, decode_pod => 1)"
       Constructs a "Module::Metadata" object given the	path to	a file.
       Returns undef if	the filename does not exist.

       "collect_pod" is	a optional boolean argument that determines whether
       POD data	is collected and stored	for reference.	POD data is not
       collected by default.  POD headings are always collected.

       If the file begins by an	UTF-8, UTF-16BE	or UTF-16LE byte-order mark,
       then it is skipped before processing, and the content of	the file is
       also decoded appropriately starting from	perl 5.8.

       Alternatively, if "decode_pod" is set, it will decode the collected pod
       sections	according to the "=encoding" declaration.

   "new_from_handle($handle, $filename,	collect_pod => 1, decode_pod =>	1)"
       This works just like "new_from_file", except that a handle can be
       provided	as the first argument.

       Note that there is no validation	to confirm that	the handle is a	handle
       or something that can act like one.  Passing something that isn't a
       handle will cause a exception when trying to read from it.  The
       "filename" argument is mandatory	or undef will be returned.

       You are responsible for setting the decoding layers on $handle if

   "new_from_module($module, collect_pod => 1, inc => \@dirs, decode_pod =>
       Constructs a "Module::Metadata" object given a module or	package	name.
       Returns undef if	the module cannot be found.

       In addition to accepting	the "collect_pod" and "decode_pod" arguments
       as described above, this	method accepts a "inc" argument	which is a
       reference to an array of	directories to search for the module.  If none
       are given, the default is @INC.

       If the file that	contains the module begins by an UTF-8,	UTF-16BE or
       UTF-16LE	byte-order mark, then it is skipped before processing, and the
       content of the file is also decoded appropriately starting from perl

   "find_module_by_name($module, \@dirs)"
       Returns the path	to a module given the module or	package	name. A	list
       of directories can be passed in as an optional parameter, otherwise
       @INC is searched.

       Can be called as	either an object or a class method.

   "find_module_dir_by_name($module, \@dirs)"
       Returns the entry in @dirs (or @INC by default) that contains the
       module $module. A list of directories can be passed in as an optional
       parameter, otherwise @INC is searched.

       Can be called as	either an object or a class method.

   "provides( %options )"
       This is a convenience wrapper around "package_versions_from_directory"
       to generate a CPAN META "provides" data structure.  It takes key/value
       pairs.  Valid option keys include:

       version (required)
	   Specifies which version of the CPAN::Meta::Spec should be used as
	   the format of the "provides"	output.	 Currently only	'1.4' and '2'
	   are supported (and their format is identical).  This	may change in
	   the future as the definition	of "provides" changes.

	   The "version" option	is required.  If it is omitted or if an
	   unsupported version is given, then "provides" will throw an error.

       dir Directory to	search recursively for .pm files.  May not be
	   specified with "files".

	   Array reference of files to examine.	 May not be specified with

	   String to prepend to	the "file" field of the	resulting output. This
	   defaults to lib, which is the common	case for most CPAN
	   distributions with their .pm	files in lib.  This option ensures the
	   META	information has	the correct relative path even when the	"dir"
	   or "files" arguments	are absolute or	have relative paths from a
	   location other than the distribution	root.

       For example, given "dir"	of 'lib' and "prefix" of 'lib',	the return
       value is	a hashref of the form:

	   'Package::Name' => {
	     version =>	'0.123',
	     file => 'lib/Package/'
	   'OtherPackage::Name'	=> ...

   "package_versions_from_directory($dir, \@files?)"
       Scans $dir for .pm files	(unless	@files is given, in which case looks
       for those files in $dir - and reads each	file for packages and
       versions, returning a hashref of	the form:

	   'Package::Name' => {
	     version =>	'0.123',
	     file => 'Package/'
	   'OtherPackage::Name'	=> ...

       The "DB"	and "main" packages are	always omitted,	as are any "private"
       packages	that have leading underscores in the namespace (e.g.

       Note that the file path is relative to $dir if that is specified.  This
       must not	be used	directly for CPAN META "provides".  See	the "provides"
       method instead.

   "log_info (internal)"
       Used internally to perform logging; imported from Log::Contextual if
       Log::Contextual has already been	loaded,	otherwise simply calls warn.

       Returns the name	of the package represented by this module. If there is
       more than one package, it makes a best guess based on the filename. If
       it's a script (i.e. not a *.pm) the package name	is 'main'.

       Returns the version as defined by the $VERSION variable for the package
       as returned by the "name" method	if no arguments	are given. If given
       the name	of a package it	will attempt to	return the version of that
       package if it is	specified in the file.

       Returns the absolute path to the	file.  Note that this file may not
       actually	exist on disk yet, e.g.	if the module was read from an in-
       memory filehandle.

       Returns a list of packages. Note: this is a raw list of packages
       discovered (or assumed, in the case of "main").	It is not filtered for
       "DB", "main" or private packages	the way	the "provides" method does.
       Invalid package names are not returned, for example "Foo:Bar".  Strange
       but valid package names are returned, for example "Foo::Bar::", and are
       left up to the caller on	how to handle.

       Returns a list of POD sections.

       Returns true if there is	any POD	in the file.

       Returns the POD data in the given section.

   "is_indexable($package)" or "is_indexable()"
       Available since version 1.000020.

       Returns a boolean indicating whether the	package	(if provided) or any
       package (otherwise) is eligible for indexing by PAUSE, the Perl Authors
       Upload Server.  Note This only checks for valid "package" declarations,
       and does	not take any ownership information into	account.

       Bugs may	be submitted through the RT bug	tracker
       <> (or <mailto:bug-Module->).

       There is	also a mailing list available for users	of this	distribution,
       at <>.

       There is	also an	irc channel available for users	of this	distribution,
       at "#toolchain" on "" <irc://>.

       Original	code from Module::Build::ModuleInfo by Ken Williams
       <>, Randy W. Sims <>

       Released	as Module::Metadata by Matt S Trout (mst)
       <> with assistance from David	Golden (xdg)

       o   Karen Etheridge <>

       o   David Golden	<>

       o   Vincent Pit <>

       o   Matt	S Trout	<>

       o   Chris Nehren	<>

       o   Tomas Doran <>

       o   Olivier Mengue <>

       o   Graham Knop <>

       o   tokuhirom <>

       o   Tatsuhiko Miyagawa <>

       o   Christian Walde <>

       o   Leon	Timmermans <>

       o   Peter Rabbitson <>

       o   Steve Hay <>

       o   Jerry D. Hedden <>

       o   Craig A. Berry <>

       o   Craig A. Berry <>

       o   David Mitchell <>

       o   David Steinbrunner <>

       o   Edward Zborowski <>

       o   Gareth Harper <>

       o   James Raspass <>

       o   Chris 'BinGOs' Williams <>

       o   Josh	Jore <>

       o   Kent	Fredric	<>

       Original	code Copyright (c) 2001-2011 Ken Williams.  Additional code
       Copyright (c) 2010-2011 Matt Trout and David Golden.  All rights

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.32.0			  2020-06-14		   Module::Metadata(3)


Want to link to this manual page? Use this URL:

home | help