package AutoSplit;
use 5.006_001;
use Exporter ();
use Carp qw(carp);
use strict;
$VERSION = "1.04";
=head1 NAME
AutoSplit - split a package for autoloading
=head1 SYNOPSIS
autosplit($file, $dir, $keep, $check, $modtime);
autosplit_lib_modules(@modules);
=head1 DESCRIPTION
This function will split up your program into files that the AutoLoader
module can handle. It is used by both the standard perl libraries and by
the MakeMaker utility, to automatically configure libraries for autoloading.
The C<autosplit> interface splits the specified file into a hierarchy
rooted at the directory C<$dir>. It creates directories as needed to reflect
class hierarchy, and creates the file F<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 C<autosplit> govern other options to
the autosplitter.
=over 2
=item $keep
If the third argument, I<$keep>, is false, then any
pre-existing C<*.al> files in the autoload directory are removed if
they are no longer part of the module (obsoleted functions).
$keep defaults to 0.
=item $check
The
fourth argument, I<$check>, instructs C<autosplit> to check the module
currently being split to ensure that it includes a C<use>
specification for the AutoLoader module, and skips the module if
AutoLoader is not detected.
$check defaults to 1.
=item $modtime
Lastly, the I<$modtime> argument specifies
that C<autosplit> is to check the modification time of the module
against that of the C<autosplit.ix> file, and only split the module if
it is newer.
$modtime defaults to 1.
=back
Typical use of AutoSplit in the perl MakeMaker utility is via the command-line
with:
perl -e 'use AutoSplit; autosplit($ARGV[0], $ARGV[1], 0, 1, 1)'
Defined as a Make macro, it is invoked with file and directory arguments;
C<autosplit> will split the specified file into the specified directory and
delete obsolete C<.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 C<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
B<lib> relative to the current directory. Each file is sent to the
In both usages of the autosplitter, only subroutines defined following the
perl I<__END__> token are split out into separate files. Some
routines may be placed prior to this marker to force their immediate loading
and parsing.
=head2 Multiple packages
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 { ... }
=head1 DIAGNOSTICS
C<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 C<AutoSplit> have
created the full directory path ahead of time. This warning may
indicate that the module is being split into an incorrect path.
C<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 C<AutoSplit> cannot locate
either the I<__END__> marker or a "package Name;"-style specification.
C<AutoSplit> will also emit general diagnostics for inability to
create directories or files.
=cut
# for portability warn about names longer than $maxlen
$Keep = 0;
$CheckForAutoloader = 1;
$CheckModTime = 1;
my $maxflen = 255;
}
my $Is_VMS = ($^O eq 'VMS');
# allow checking for valid ': attrlist' attachments
# (we use 'our' rather than 'my' here, due to the rather complex and buggy
# behaviour of lexicals with qr// and (??{$lex}) )
our $nested;
sub autosplit{
# $file - the perl source file to be split (after __END__)
# $autodir - the ".../auto" dir below which to write split subs
# Handle optional flags:
}
# This function is used during perl building/installation
# ./miniperl -e 'use AutoSplit; autosplit_lib_modules(@ARGV)' ...
my(@modules) = @_; # list of Module names
while(defined($_ = shift @modules)){
while (m#(.*?[^:])::([^:].*)#) { # in case specified as ABC::XYZ
}
s|\\|/|g; # bug in ksh OS/2
s#^lib/##s; # incase specified as lib/*.pm
if ($Is_VMS) { # may need to convert VMS-style filespecs
$lib =~ s#^\[\]#.\/#;
}
s#^$lib\W+##s; # incase specified as ./lib/*.pm
if ($Is_VMS && /[:>\]]/) { # may need to convert VMS-style filespecs
$dir =~ s/.*lib[\.\]]//s;
$dir =~ s#[\.\]]#/#g;
}
}
0;
}
# private functions
sub autosplit_file {
= @_;
my(@outfiles);
local($_);
local($/) = "\n";
# where to write output files
if ($Is_VMS) {
}
unless (-d $autodir){
# We should never need to create the auto dir
# here. installperl (or similar) should have done
# it. Expecting it to exist is a valuable sanity check against
# autosplitting into some random directory by mistake.
print "Warning: AutoSplit had to create top-level " .
"$autodir unexpectedly.\n";
}
# allow just a package name to be used
my($autoloader_seen) = 0;
my($in_pod) = 0;
while (<$in>) {
# Skip pod text.
$fnr++;
$in_pod = 1 if /^=\w/;
next if /^\s*#/;
# record last package name seen
$def_package = $1 if (m/^\s*package\s+([\w:]+)\s*;/);
++$autoloader_seen if m/^\s*(use|require)\s+AutoLoader\b/;
last if /^__END__/;
}
if ($check_for_autoloader && !$autoloader_seen){
print "AutoSplit skipped $filename: no AutoLoader used\n"
if ($Verbose>=2);
return 0;
}
$_ or die "Can't find __END__ in $filename\n";
$def_package or die "Can't find 'package Name;' in $filename\n";
# this _has_ to match so we have a reasonable timestamp file
die "Package $def_package ($modpname.pm) does not ".
"match filename $filename"
($^O eq 'dos') or ($^O eq 'MSWin32') or ($^O eq 'NetWare') or
if ($check_mod_time){
if ($al_ts_time >= $pm_mod_time and
$al_ts_time >= $self_mod_time){
print "AutoSplit skipped ($al_idx_file newer than $filename)\n"
if ($Verbose >= 2);
return undef; # one undef, not a list
}
}
print "AutoSplitting $filename ($modnamedir)\n"
if $Verbose;
unless (-d $modnamedir){
}
# We must try to deal with some SVR3 systems with a limit of 14
# characters for file names. Sadly we *cannot* simply truncate all
# file names to 14 characters on these systems because we *must*
# create filenames which exactly match the names used by AutoLoader.pm.
# This is a problem because some systems silently truncate the file
# names while others treat long file names as an error.
my @cache = ();
my $caching = 1;
$last_package = '';
my $out;
while (<$in>) {
$fnr++;
$in_pod = 1 if /^=\w/;
# the following (tempting) old coding gives big troubles if a
# cut is forgotten at EOF:
# next if /^=\w/ .. /^=cut/;
if (/^package\s+([\w:]+)\s*;/) {
}
if (/^sub\s+([\w:]+)(\s*(?:\(.*?\))?(?:$attr_list)?)/) {
print $out "# end of $last_package\::$subname\n1;\n"
if $last_package;
$subname = $1;
if ($subname =~ s/(.*):://){
$this_package = $1;
} else {
$this_package = $def_package;
}
my $fq_subname = "$this_package\::$subname";
push(@subnames, $fq_subname);
my $path;
} else {
print " writing $spath (with truncated name)\n"
if ($Verbose>=1);
}
# NOTE: Derived from $filename.
# Changes made here will be lost when autosplit is run again.
# See AutoSplit.pm.
package $this_package;
#line $lineno "$filename (autosplit into $path)"
@cache = ();
$caching = 0;
}
if($caching) {
} else {
print $out $_;
}
if(/^\}/) {
if($caching) {
@cache = ();
}
print $out "\n";
$caching = 1;
}
}
if ($subname) {
close($out);
}
close($in);
if (!$keep){ # don't keep any obsolete *.al files in the directory
my(%outfiles);
# @outfiles{@outfiles} = @outfiles;
# perl downcases all filenames on VMS (which upcases all filenames) so
# we'd better downcase the sub name list too, or subs with upper case
# letters in them will get their .al files deleted right after they're
# created. (The mixed case sub name won't match the all-lowercase
# filename, and so be cleaned up as a scrap file)
} else {
}
for (@outfiles) {
}
foreach (sort readdir($outdir)){
next unless /\.al\z/;
carp "Unable to delete $file: $!" unless $deleted;
}
closedir($outdir);
}
}
open(my $ts,">$al_idx_file") or
carp "AutoSplit: unable to create timestamp file ($al_idx_file): $!";
print $ts "# Index created by AutoSplit for $filename\n";
print $ts "# (file acts as timestamp)\n";
$last_package = '';
$subname =~ s/.*:://;
print $ts "package $package{$fqs};\n"
print $ts "sub $subname $proto{$fqs};\n";
}
print $ts "1;\n";
close($ts);
@outfiles;
}
sub _modpname ($) {
my($package) = @_;
if ($^O eq 'MSWin32') {
$modpname =~ s#::#\\#g;
} else {
my @modpnames = ();
while ($modpname =~ m#(.*?[^:])::([^:].*)#) {
push @modpnames, $1;
$modpname = $2;
}
}
if ($Is_VMS) {
}
$modpname;
}
sub _check_unique {
my(%notuniq) = ();
my(%shorts) = ();
my(@toolong) = grep(
> $maxlen,
);
foreach (@toolong){
"$shorts{$dir}{$trunc}, $file" : $file;
}
print "$filename: some names are not unique when " .
"truncated to $maxlen characters:\n";
print " directory $dir:\n";
print " $shorts{$dir}{$trunc} truncate to $trunc\n";
}
}
}
}
1;
# test functions so AutoSplit.pm can be applied to itself:
sub test1 ($) { "test 1\n"; }
sub test2 ($$) { "test 2\n"; }
sub test3 ($$$) { "test 3\n"; }
sub testtesttesttest4_1 { "test 4\n"; }
sub testtesttesttest4_2 { "duplicate test 4\n"; }
sub testtesttesttest4_1 ($) { "another test 4\n"; }
sub testtesttesttest4_2 ($$) { "another duplicate test 4\n"; }