1Module::Locate(3) User Contributed Perl Documentation Module::Locate(3)
2
6 Module::Locate - locate modules in the same fashion as "require" and
7 "use"
8
10 use Module::Locate qw/ locate get_source /;
11 add_plugin( locate "This::Module" );
13 eval 'use strict; ' . get_source('legacy_code.plx');
14
16 Using "locate()", return the path that "require" would find for a given
17 module or filename (it can also return a filehandle if a reference in
18 @INC has been used). This means you can test for the existence, or find
19 the path for, modules without having to evaluate the code they contain.
20 This module also comes with accompanying utility functions that are
22 used within the module itself (except for "get_source") and are
23 available for import.
24
26 "import"
27 Given function names, the appropriate functions will be exported
28 into the caller's package.
29 If ":all" is passed then all subroutines are exported.
31 The Global and Cache options are no longer supported. See the BUGS
33 section below.
34 "locate($module_name)"
36 Given a module name as a string (in standard perl bareword format)
37 locate the path of the module. If called in a scalar context the
38 first path found will be returned, if called in a list context a
39 list of paths where the module was found. Also, if references have
40 been placed in @INC then a filehandle will be returned, as defined
41 in the "require" documentation. An empty "return" is used if the
42 module couldn't be located.
43 As of version 1.7 a filename can also be provided to further mimic
45 the lookup behaviour of "require"/"use".
46 "get_source($module_name)"
48 When provided with a package name, gets the path using "locate()".
49 If "locate()" returned a path, then the contents of that file are
50 returned by "get_source()" in a scalar.
51 "acts_like_fh"
53 Given a scalar, check if it behaves like a filehandle. Firstly it
54 checks if it is a bareword filehandle, then if it inherits from
55 "IO::Handle" and lastly if it overloads the "<>" operator. If this
56 is missing any other standard filehandle behaviour, please send me
57 an e-mail.
58 "mod_to_path($module_name)"
60 Given a module name, converts it to a relative path e.g "Foo::Bar"
61 would become "Foo/Bar.pm".
62 Note that this path will always use '/' for the directory
64 separator, even on Windows, as that's the format used in %INC.
65 "is_mod_loaded($module_name)"
67 Given a module name, return true if the module has been loaded (i.e
68 exists in the %INC hash).
69 "is_pkg_loaded($package_name)"
71 Given a package name (like "locate()"), check if the package has an
72 existing symbol table loaded (checks by walking the %main:: stash).
73
75 A review of modules that can be used to get the path (and often other
76 information) for one or more modules:
77 <http://neilb.org/reviews/module-path.html>.
78 App::Module::Locate and mlocate.
80
82 <https://github.com/neilb/Module-Locate>
83
85 In previous versions of this module, if you specified "Global => 1"
86 when use'ing this module, then looking up a module's path would update
87 %INC, even if the module hadn't actually been loaded (yet). This meant
88 that if you subsequently tried to load the module, it would wrongly not
89 be loaded.
90 Bugs are tracked using RT (bug you can also raise Github issues if you
92 prefer):
93 <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Module-Locate>
95
97 Dan Brook "<cpan@broquaint.com>"
98
100 This is free software; you can redistribute it and/or modify it under
101 the same terms as Perl itself.
102perl v5.28.0 2015-10-25 Module::Locate(3)