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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Current File : //proc/thread-self/root/usr/share/perl5/blib.pm

package blib;

=head1 NAME

blib - Use MakeMaker's uninstalled version of a package

=head1 SYNOPSIS

 perl -Mblib script [args...]

 perl -Mblib=dir script [args...]

=head1 DESCRIPTION

Looks for MakeMaker-like I<'blib'> directory structure starting in
I<dir> (or current directory) and working back up to five levels of '..'.

Intended for use on command line with B<-M> option as a way of testing
arbitrary scripts against an uninstalled version of a package.

However it is possible to :

 use blib;
 or
 use blib '..';

etc. if you really must.

=head1 BUGS

Pollutes global name space for development only task.

=head1 AUTHOR

Nick Ing-Simmons nik@tiuk.ti.com

=cut

use Cwd;
use File::Spec;

use vars qw($VERSION $Verbose);
$VERSION = '1.06';
$Verbose = 0;

sub import
{
 my $package = shift;
 my $dir;
 if ($^O eq "MSWin32" && -f "Win32.xs") {
     # We don't use getcwd() on Windows because it will internally
     # call Win32::GetCwd(), which will get the Win32 module loaded.
     # That means that it would not be possible to run `make test`
     # for the Win32 module because blib.pm would always load the
     # installed version before @INC gets updated with the blib path.
     chomp($dir = `cd`);
 }
 else {
     $dir = getcwd;
 }
 if ($^O eq 'VMS') { ($dir = VMS::Filespec::unixify($dir)) =~ s-/\z--; }
 if (@_)
  {
   $dir = shift;
   $dir =~ s/blib\z//;
   $dir =~ s,/+\z,,;
   $dir = File::Spec->curdir unless ($dir);
   die "$dir is not a directory\n" unless (-d $dir);
  }

 # detaint: if the user asked for blib, s/he presumably knew
 # what s/he wanted
 $dir = $1 if $dir =~ /^(.*)$/;

 my $i = 5;
 my($blib, $blib_lib, $blib_arch);
 while ($i--)
  {
   $blib = File::Spec->catdir($dir, "blib");
   $blib_lib = File::Spec->catdir($blib, "lib");
   $blib_arch = File::Spec->catdir($blib, "arch");

   if (-d $blib && -d $blib_arch && -d $blib_lib)
    {
     unshift(@INC,$blib_arch,$blib_lib);
     warn "Using $blib\n" if $Verbose;
     return;
    }
   $dir = File::Spec->catdir($dir, File::Spec->updir);
  }
 die "Cannot find blib even in $dir\n";
}

1;

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