1AutoSplit(3pm)         Perl Programmers Reference Guide         AutoSplit(3pm)
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NAME

6       AutoSplit - split a package for autoloading
7

SYNOPSIS

9        autosplit($file, $dir, $keep, $check, $modtime);
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11        autosplit_lib_modules(@modules);
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DESCRIPTION

14       This function will split up your program into files that the AutoLoader
15       module can handle. It is used by both the standard perl libraries and
16       by the MakeMaker utility, to automatically configure libraries for
17       autoloading.
18
19       The "autosplit" interface splits the specified file into a hierarchy
20       rooted at the directory $dir. It creates directories as needed to
21       reflect class hierarchy, and creates the file autosplit.ix. This file
22       acts as both forward declaration of all package routines, and as
23       timestamp for the last update of the hierarchy.
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25       The remaining three arguments to "autosplit" govern other options to
26       the autosplitter.
27
28       $keep
29         If the third argument, $keep, is false, then any pre-existing "*.al"
30         files in the autoload directory are removed if they are no longer
31         part of the module (obsoleted functions).  $keep defaults to 0.
32
33       $check
34         The fourth argument, $check, instructs "autosplit" to check the
35         module currently being split to ensure that it includes a "use"
36         specification for the AutoLoader module, and skips the module if
37         AutoLoader is not detected.  $check defaults to 1.
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39       $modtime
40         Lastly, the $modtime argument specifies that "autosplit" is to check
41         the modification time of the module against that of the
42         "autosplit.ix" file, and only split the module if it is newer.
43         $modtime defaults to 1.
44
45       Typical use of AutoSplit in the perl MakeMaker utility is via the
46       command-line with:
47
48        perl -e 'use AutoSplit; autosplit($ARGV[0], $ARGV[1], 0, 1, 1)'
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50       Defined as a Make macro, it is invoked with file and directory
51       arguments; "autosplit" will split the specified file into the specified
52       directory and delete obsolete ".al" files, after checking first that
53       the module does use the AutoLoader, and ensuring that the module is not
54       already currently split in its current form (the modtime test).
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56       The "autosplit_lib_modules" form is used in the building of perl. It
57       takes as input a list of files (modules) that are assumed to reside in
58       a directory lib relative to the current directory. Each file is sent to
59       the autosplitter one at a time, to be split into the directory
60       lib/auto.
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62       In both usages of the autosplitter, only subroutines defined following
63       the perl __END__ token are split out into separate files. Some routines
64       may be placed prior to this marker to force their immediate loading and
65       parsing.
66
67   Multiple packages
68       As of version 1.01 of the AutoSplit module it is possible to have
69       multiple packages within a single file. Both of the following cases are
70       supported:
71
72          package NAME;
73          __END__
74          sub AAA { ... }
75          package NAME::option1;
76          sub BBB { ... }
77          package NAME::option2;
78          sub BBB { ... }
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80          package NAME;
81          __END__
82          sub AAA { ... }
83          sub NAME::option1::BBB { ... }
84          sub NAME::option2::BBB { ... }
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DIAGNOSTICS

87       "AutoSplit" will inform the user if it is necessary to create the top-
88       level directory specified in the invocation. It is preferred that the
89       script or installation process that invokes "AutoSplit" have created
90       the full directory path ahead of time. This warning may indicate that
91       the module is being split into an incorrect path.
92
93       "AutoSplit" will warn the user of all subroutines whose name causes
94       potential file naming conflicts on machines with drastically limited (8
95       characters or less) file name length. Since the subroutine name is used
96       as the file name, these warnings can aid in portability to such
97       systems.
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99       Warnings are issued and the file skipped if "AutoSplit" cannot locate
100       either the __END__ marker or a "package Name;"-style specification.
101
102       "AutoSplit" will also emit general diagnostics for inability to create
103       directories or files.
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AUTHOR

106       "AutoSplit" is maintained by the perl5-porters. Please direct any
107       questions to the canonical mailing list. Anything that is applicable to
108       the CPAN release can be sent to its maintainer, though.
109
110       Author and Maintainer: The Perl5-Porters <perl5-porters@perl.org>
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112       Maintainer of the CPAN release: Steffen Mueller <smueller@cpan.org>
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115       This package has been part of the perl core since the first release of
116       perl5. It has been released separately to CPAN so older installations
117       can benefit from bug fixes.
118
119       This package has the same copyright and license as the perl core:
120
121                    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
122               2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
123               by Larry Wall and others
124
125                                   All rights reserved.
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127           This program is free software; you can redistribute it and/or modify
128           it under the terms of either:
129
130               a) the GNU General Public License as published by the Free
131               Software Foundation; either version 1, or (at your option) any
132               later version, or
133
134               b) the "Artistic License" which comes with this Kit.
135
136           This program is distributed in the hope that it will be useful,
137           but WITHOUT ANY WARRANTY; without even the implied warranty of
138           MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See either
139           the GNU General Public License or the Artistic License for more details.
140
141           You should have received a copy of the Artistic License with this
142           Kit, in the file named "Artistic".  If not, I'll be glad to provide one.
143
144           You should also have received a copy of the GNU General Public License
145           along with this program in the file named "Copying". If not, write to the
146           Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
147           02111-1307, USA or visit their web page on the internet at
148           http://www.gnu.org/copyleft/gpl.html.
149
150           For those of you that choose to use the GNU General Public License,
151           my interpretation of the GNU General Public License is that no Perl
152           script falls under the terms of the GPL unless you explicitly put
153           said script under the terms of the GPL yourself.  Furthermore, any
154           object code linked with perl does not automatically fall under the
155           terms of the GPL, provided such object code only adds definitions
156           of subroutines and variables, and does not otherwise impair the
157           resulting interpreter from executing any standard Perl script.  I
158           consider linking in C subroutines in this manner to be the moral
159           equivalent of defining subroutines in the Perl language itself.  You
160           may sell such an object file as proprietary provided that you provide
161           or offer to provide the Perl source, as specified by the GNU General
162           Public License.  (This is merely an alternate way of specifying input
163           to the program.)  You may also sell a binary produced by the dumping of
164           a running Perl script that belongs to you, provided that you provide or
165           offer to provide the Perl source as specified by the GPL.  (The
166           fact that a Perl interpreter and your code are in the same binary file
167           is, in this case, a form of mere aggregation.)  This is my interpretation
168           of the GPL.  If you still have concerns or difficulties understanding
169           my intent, feel free to contact me.  Of course, the Artistic License
170           spells all this out for your protection, so you may prefer to use that.
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174perl v5.12.4                      2011-06-01                    AutoSplit(3pm)
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