Author: dagolden
Date: Mon Oct 5 04:35:38 2009
New Revision: 13375
Added:
Module-Build/branches/inc-bundling/lib/inc/latest/
Module-Build/branches/inc-bundling/lib/inc/latest/private.pm (contents,
props changed)
Log:
added inc::latest::private to repo
Added: Module-Build/branches/inc-bundling/lib/inc/latest/private.pm
==============================================================================
--- (empty file)
+++ Module-Build/branches/inc-bundling/lib/inc/latest/private.pm Mon Oct
5 04:35:38 2009
@@ -0,0 +1,101 @@
+package inc::latest::private;
+use strict;
+use vars qw($VERSION);
+$VERSION = '0.35_03';
+$VERSION = eval $VERSION;
+
+use File::Spec;
+use IO::File;
+
+# must ultimately "goto" the import routine of the module to be loaded
+# so that the calling package is correct when $mod->import() runs.
+sub import {
+ my ($package, $mod, @args) = @_;
+ my $file = $package->_mod2path($mod);
+
+ if ($INC{$file}) {
+ # Already loaded, but let _load_module handle import args
+ goto \&_load_module;
+ }
+
+ # A bundled copy must be present
+ my ($bundled, $bundled_dir) = $package->_search_bundled($file)
+ or die "No bundled copy of $mod found";
+
+ my $from_inc = $package->_search_INC($file);
+ unless ($from_inc) {
+ # Only bundled is available
+ unshift(@INC, $bundled_dir);
+ goto \&_load_module;
+ }
+
+ if (_version($from_inc) >= _version($bundled)) {
+ # Ignore the bundled copy
+ goto \&_load_module;
+ }
+
+ # Load the bundled copy
+ unshift(@INC, $bundled_dir);
+ goto \&_load_module;
+}
+
+sub _version {
+ require ExtUtils::MakeMaker;
+ return ExtUtils::MM->parse_version(shift);
+}
+
+# use "goto" for import to preserve caller
+sub _load_module {
+ my $package = shift; # remaining @_ is ready for goto
+ my ($mod, @args) = @_;
+ eval "require $mod; 1" or die $@;
+ if ( my $import = $mod->can('import') ) {
+ goto $import;
+ }
+ return 1;
+}
+
+sub _search_bundled {
+ my ($self, $file) = @_;
+
+ my $mypath = 'inc';
+
+ local *DH; # Maintain 5.005 compatibility
+ opendir DH, $mypath or die "Can't open directory $mypath: $!";
+
+ while (defined(my $e = readdir DH)) {
+ next unless $e =~ /^inc_/;
+ my $try = File::Spec->catfile($mypath, $e, $file);
+
+ return($try, File::Spec->catdir($mypath, $e)) if -e $try;
+ }
+ return;
+}
+
+# Look for the given path in @INC.
+sub _search_INC {
+ # TODO: doesn't handle coderefs or arrayrefs or objects in @INC, but
+ # it probably should
+ my ($self, $file) = @_;
+
+ foreach my $dir (@INC) {
+ next if ref $dir;
+ my $try = File::Spec->catfile($dir, $file);
+ return $try if -e $try;
+ }
+
+ return;
+}
+
+# Translate a module name into a directory/file.pm to search for in @INC
+sub _mod2path {
+ my ($self, $mod) = @_;
+ my @parts = split /::/, $mod;
+ $parts[-1] .= '.pm';
+ return $parts[0] if @parts == 1;
+ return File::Spec->catfile(@parts);
+}
+
+1;
+
+
