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authorSiep Kroonenberg <siepo@cybercomm.nl>2011-02-17 12:20:49 +0000
committerSiep Kroonenberg <siepo@cybercomm.nl>2011-02-17 12:20:49 +0000
commit316ee97c621496b0fe3267f57cce81bee44ca1e6 (patch)
treecb2cab1192b4f58a7971af19b213e980bceda4b4 /Master/tlpkg/tlperl/lib/FindBin.pm
parentcd0f87b5d39480d85ad9bd4ee37f520f75bed560 (diff)
Moving old tlperl prior to committing new one
git-svn-id: svn://tug.org/texlive/trunk@21422 c570f23f-e606-0410-a88d-b1316a301751
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diff --git a/Master/tlpkg/tlperl/lib/FindBin.pm b/Master/tlpkg/tlperl/lib/FindBin.pm
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-# FindBin.pm
-#
-# Copyright (c) 1995 Graham Barr & Nick Ing-Simmons. All rights reserved.
-# This program is free software; you can redistribute it and/or modify it
-# under the same terms as Perl itself.
-
-=head1 NAME
-
-FindBin - Locate directory of original perl script
-
-=head1 SYNOPSIS
-
- use FindBin;
- use lib "$FindBin::Bin/../lib";
-
- or
-
- use FindBin qw($Bin);
- use lib "$Bin/../lib";
-
-=head1 DESCRIPTION
-
-Locates the full path to the script bin directory to allow the use
-of paths relative to the bin directory.
-
-This allows a user to setup a directory tree for some software with
-directories C<< <root>/bin >> and C<< <root>/lib >>, and then the above
-example will allow the use of modules in the lib directory without knowing
-where the software tree is installed.
-
-If perl is invoked using the B<-e> option or the perl script is read from
-C<STDIN> then FindBin sets both C<$Bin> and C<$RealBin> to the current
-directory.
-
-=head1 EXPORTABLE VARIABLES
-
- $Bin - path to bin directory from where script was invoked
- $Script - basename of script from which perl was invoked
- $RealBin - $Bin with all links resolved
- $RealScript - $Script with all links resolved
-
-=head1 KNOWN ISSUES
-
-If there are two modules using C<FindBin> from different directories
-under the same interpreter, this won't work. Since C<FindBin> uses a
-C<BEGIN> block, it'll be executed only once, and only the first caller
-will get it right. This is a problem under mod_perl and other persistent
-Perl environments, where you shouldn't use this module. Which also means
-that you should avoid using C<FindBin> in modules that you plan to put
-on CPAN. To make sure that C<FindBin> will work is to call the C<again>
-function:
-
- use FindBin;
- FindBin::again(); # or FindBin->again;
-
-In former versions of FindBin there was no C<again> function. The
-workaround was to force the C<BEGIN> block to be executed again:
-
- delete $INC{'FindBin.pm'};
- require FindBin;
-
-=head1 KNOWN BUGS
-
-If perl is invoked as
-
- perl filename
-
-and I<filename> does not have executable rights and a program called
-I<filename> exists in the users C<$ENV{PATH}> which satisfies both B<-x>
-and B<-T> then FindBin assumes that it was invoked via the
-C<$ENV{PATH}>.
-
-Workaround is to invoke perl as
-
- perl ./filename
-
-=head1 AUTHORS
-
-FindBin is supported as part of the core perl distribution. Please send bug
-reports to E<lt>F<perlbug@perl.org>E<gt> using the perlbug program
-included with perl.
-
-Graham Barr E<lt>F<gbarr@pobox.com>E<gt>
-Nick Ing-Simmons E<lt>F<nik@tiuk.ti.com>E<gt>
-
-=head1 COPYRIGHT
-
-Copyright (c) 1995 Graham Barr & Nick Ing-Simmons. All rights reserved.
-This program is free software; you can redistribute it and/or modify it
-under the same terms as Perl itself.
-
-=cut
-
-package FindBin;
-use Carp;
-require 5.000;
-require Exporter;
-use Cwd qw(getcwd cwd abs_path);
-use File::Basename;
-use File::Spec;
-
-@EXPORT_OK = qw($Bin $Script $RealBin $RealScript $Dir $RealDir);
-%EXPORT_TAGS = (ALL => [qw($Bin $Script $RealBin $RealScript $Dir $RealDir)]);
-@ISA = qw(Exporter);
-
-$VERSION = "1.50";
-
-
-# needed for VMS-specific filename translation
-if( $^O eq 'VMS' ) {
- require VMS::Filespec;
- VMS::Filespec->import;
-}
-
-sub cwd2 {
- my $cwd = getcwd();
- # getcwd might fail if it hasn't access to the current directory.
- # try harder.
- defined $cwd or $cwd = cwd();
- $cwd;
-}
-
-sub init
-{
- *Dir = \$Bin;
- *RealDir = \$RealBin;
-
- if($0 eq '-e' || $0 eq '-')
- {
- # perl invoked with -e or script is on C<STDIN>
- $Script = $RealScript = $0;
- $Bin = $RealBin = cwd2();
- $Bin = VMS::Filespec::unixify($Bin) if $^O eq 'VMS';
- }
- else
- {
- my $script = $0;
-
- if ($^O eq 'VMS')
- {
- ($Bin,$Script) = VMS::Filespec::rmsexpand($0) =~ /(.*[\]>\/]+)(.*)/s;
- # C<use disk:[dev]/lib> isn't going to work, so unixify first
- ($Bin = VMS::Filespec::unixify($Bin)) =~ s/\/\z//;
- ($RealBin,$RealScript) = ($Bin,$Script);
- }
- else
- {
- my $dosish = ($^O eq 'MSWin32' or $^O eq 'os2');
- unless(($script =~ m#/# || ($dosish && $script =~ m#\\#))
- && -f $script)
- {
- my $dir;
- foreach $dir (File::Spec->path)
- {
- my $scr = File::Spec->catfile($dir, $script);
-
- # $script can been found via PATH but perl could have
- # been invoked as 'perl file'. Do a dumb check to see
- # if $script is a perl program, if not then keep $script = $0
- #
- # well we actually only check that it is an ASCII file
- # we know its executable so it is probably a script
- # of some sort.
- if(-f $scr && -r _ && ($dosish || -x _) && -s _ && -T _)
- {
- $script = $scr;
- last;
- }
- }
- }
-
- croak("Cannot find current script '$0'") unless(-f $script);
-
- # Ensure $script contains the complete path in case we C<chdir>
-
- $script = File::Spec->catfile(cwd2(), $script)
- unless File::Spec->file_name_is_absolute($script);
-
- ($Script,$Bin) = fileparse($script);
-
- # Resolve $script if it is a link
- while(1)
- {
- my $linktext = readlink($script);
-
- ($RealScript,$RealBin) = fileparse($script);
- last unless defined $linktext;
-
- $script = (File::Spec->file_name_is_absolute($linktext))
- ? $linktext
- : File::Spec->catfile($RealBin, $linktext);
- }
-
- # Get absolute paths to directories
- if ($Bin) {
- my $BinOld = $Bin;
- $Bin = abs_path($Bin);
- defined $Bin or $Bin = File::Spec->canonpath($BinOld);
- }
- $RealBin = abs_path($RealBin) if($RealBin);
- }
- }
-}
-
-BEGIN { init }
-
-*again = \&init;
-
-1; # Keep require happy