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lib/Acme/AutoLoad.pm  view on Meta::CPAN

package Acme::AutoLoad;

use strict;
use warnings;
use base qw(Exporter);

our $VERSION = '0.09';

our $last_fetched = "";
our $lib = "lib";
our $hook = \&inc;

sub ignore {}
sub import {
  warn "DEBUG: Congratulations! Acme::AutoLoad has been loaded.\n" if $ENV{AUTOLOAD_DEBUG};
  $lib = $ENV{AUTOLOAD_LIB} if $ENV{AUTOLOAD_LIB};
  if ($lib =~ m{^[^/]}) {
    eval {
      require Cwd;
      $lib = Cwd::abs_path($lib);
    };
  }
  push @INC, $lib, $hook if $hook;
  $hook = undef;
  return \&ignore;
}

sub mkbase {
  my $path = shift;
  if ($path =~ s{/+[^/]*$ }{}x) {
    return 1 if -d $path;
  }
  die "$path: Not a directory\n" if lstat $path;
  if (mkbase($path)) {
    warn "DEBUG: mkbase: Creating [$path] ...\n" if $ENV{AUTOLOAD_DEBUG};
    return mkdir $path, 0755;
  }
  return 0;
}

sub fetch {
  my $url = shift;
  my $recurse = shift || {};
  $url = full($url) unless $url =~ m{^\w+://};
  my $contents = get($url);
  $last_fetched = $url;
  if ($contents =~ m{The document has moved <a href="([^<>]+)">}) {
    my $bounce = $1;
    return $contents if ++$recurse->{$bounce} > 3;
    return fetch($bounce, $recurse) if ++$recurse->{total} < 21;
  }
  return $contents;
}

# full
# Turn a relative URL into a full URL
sub full {
  my $rel = shift;
  if ($rel =~ m{http://} || $last_fetched !~ m{^(http://[^/]+)(/?.*)}) {
    return $rel;
  }
  my $h = $1;
  my $p = $2;
  if ($rel =~ m{^/}) {
    return "$h$rel";
  }
  $p =~ s{[^/]*$ }{}x;
  return "$h$p$rel";
}

# fly
# Create a stub module to load the real file on-the-fly if needed.
sub fly {
  my $inc = shift;
  my $url = shift;
  my $write = shift;
  warn "DEBUG: Creating stub for [$inc] in order to download [$url] later if needed.\n" if $ENV{AUTOLOAD_DEBUG};
  my $contents = q{
    my $url = q{$URL};
    my $myself = $INC{"$inc"} || __FILE__;
    warn "DEBUG: Downloading [$url] right now ...\n" if $ENV{AUTOLOAD_DEBUG};
    my $m = Acme::AutoLoad::fetch($url);
    if ($m =~ /package/) {
      warn "DEBUG: Contents appear fine. Commencing BRICK OVER ...\n" if $ENV{AUTOLOAD_DEBUG};