p5pRT
commented
24 years ago From @simoncozens
This is lib/ByteCache.pm It does just-in-time bytecode compilation of modules. Enjoy.
Simon
package ByteCache;
BEGIN { use Config (); use File::Spec::Functions (); unshift @INC\, File::Spec::Functions::catdir($Config::Config{sitearch}\,"byte")\, \&ByteCache::bytecacher; }
use strict; use warnings; use File::Path (); use File::Basename ();
my $caching=1; # The big off switch.
sub bytecacher { # Woah\, don't fall into that trap again return undef if $_[1] eq "ByteLoader.pm" or $_[1] eq "XSLoader.pm"; return undef unless $caching;
my $current; for (@INC) { if (-e ($current = File::Spec::Functions::catfile($_\,$_[1]))) { # Bytecompile\, store and return filehandle. my $output= File::Spec::Functions::catfile( $Config::Config{sitearch}\, "byte"\, $_[1] ); my $outputdir = File::Basename::dirname($output); unless (-d $outputdir or File::Path::mkpath($outputdir)) { warn "Can't create $outputdir\, not byte caching.\n"; return undef; } warn "Compiling $_[1]\n"; if (system("perlcc -B -o $output $current") \< 0) { warn "Couldn't call the compiler.\n"; $caching=0; } if (-e $output) { open(FH\, $output); binmode FH; return *FH; } } } return undef; }
1;
=head1 NAME
ByteCache - byte-compile modules when needed
=head1 SYNOPSIS
use ByteCache; use Other::Module;
=head1 DESCRIPTION
This module causes any modules loaded after it to be loaded in bytecode compiled format. If a bytecode compiled version of the module does not currently exist\, ByteCache will call the compiler to create one and then save it away.
=head1 WARNING
This module is dependent on the compiler suite\, and is therefore B\
=head1 AUTHOR
Simon Cozens\, \simon@​brecon\.co\.uk
=head1 SEE ALSO
L\
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Migrated from rt.perl.org#3010 (status was 'resolved')
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