AutoSplit - split a package for autoloading
autosplit($file, $dir, $keep, $check, $modtime);
autosplit_lib_modules(@modules);
This function will split up your program into files that the AutoLoader module can handle. It is used by both the standard perl libraries and by the MakeMaker utility, to automatically configure libraries for autoloading.
The autosplit interface splits the specified file into a hierarchy rooted at the
directory $dir. It creates directories as needed to reflect class hierarchy, and creates
the file autosplit.ix. This file acts as both forward declaration of all package routines, and
as timestamp for the last update of the hierarchy.
The remaining three arguments to autosplit govern other options to the autosplitter.
*.al files in the autoload directory are removed if they are no longer part of
the module (obsoleted functions). $keep defaults to 0.
autosplit to check the module currently being split to ensure that it does include a use
specification for the AutoLoader module, and skips the module if AutoLoader
is not detected. $check defaults to 1.
autosplit is to check the modification time of the module against that of the autosplit.ix file, and only split the module if it is newer. $modtime
defaults to 1.
Typical use of AutoSplit in the perl MakeMaker utility is via the command-line with:
perl -e 'use AutoSplit; autosplit($ARGV[0], $ARGV[1], 0, 1, 1)'
Defined as a Make macro, it is invoked with file and directory arguments;
autosplit will split the specified file into the specified directory and delete
obsolete .al files, after checking first that the module does use the AutoLoader, and
ensuring that the module is not already currently split in its current form
(the modtime test).
The autosplit_lib_modules form is used in the building of perl. It takes as input a list of files
(modules) that are assumed to reside in a directory
lib relative to the current directory. Each file is sent to the autosplitter
one at a time, to be split into the directory lib/auto.
In both usages of the autosplitter, only subroutines defined following the perl __END__ token are split out into separate files. Some routines may be placed prior to this marker to force their immediate loading and parsing.
As of version 1.01 of the AutoSplit module it is possible to have multiple packages within a single file. Both of the following cases are supported:
package NAME;
__END__
sub AAA { ... }
package NAME::option1;
sub BBB { ... }
package NAME::option2;
sub BBB { ... }
package NAME;
__END__
sub AAA { ... }
sub NAME::option1::BBB { ... }
sub NAME::option2::BBB { ... }
AutoSplit will inform the user if it is necessary to create the top-level directory
specified in the invocation. It is preferred that the script or
installation process that invokes AutoSplit have created the full directory path ahead of time. This warning may
indicate that the module is being split into an incorrect path.
AutoSplit will warn the user of all subroutines whose name causes potential file
naming conflicts on machines with drastically limited (8 characters or
less) file name length. Since the subroutine name is used as the file name,
these warnings can aid in portability to such systems.
Warnings are issued and the file skipped if AutoSplit cannot locate either the __END__ marker or a ``package Name;''-style specification.
AutoSplit will also emit general diagnostics for inability to create directories or
files.
If rather than formatting bugs, you encounter substantive content errors in these documents, such as mistakes in the explanations or code, please use the perlbug utility included with the Perl distribution.