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- package lib;
-
- # THIS FILE IS AUTOMATICALLY GENERATED FROM lib_pm.PL.
- # ANY CHANGES TO THIS FILE WILL BE OVERWRITTEN BY THE NEXT PERL BUILD.
-
- use Config;
-
- use strict;
-
- my $archname = $Config{archname};
- my $version = $Config{version};
- my @inc_version_list = reverse split / /, $Config{inc_version_list};
-
-
- our @ORIG_INC = @INC; # take a handy copy of 'original' value
- our $VERSION = '0.5565';
- my $Is_MacOS = $^O eq 'MacOS';
- my $Mac_FS;
- if ($Is_MacOS) {
- require File::Spec;
- $Mac_FS = eval { require Mac::FileSpec::Unixish };
- }
-
- sub import {
- shift;
-
- my %names;
- foreach (reverse @_) {
- my $path = $_; # we'll be modifying it, so break the alias
- if ($path eq '') {
- require Carp;
- Carp::carp("Empty compile time value given to use lib");
- }
-
- $path = _nativize($path);
-
- if (-e $path && ! -d _) {
- require Carp;
- Carp::carp("Parameter to use lib must be directory, not file");
- }
- unshift(@INC, $path);
- # Add any previous version directories we found at configure time
- foreach my $incver (@inc_version_list)
- {
- my $dir = $Is_MacOS
- ? File::Spec->catdir( $path, $incver )
- : "$path/$incver";
- unshift(@INC, $dir) if -d $dir;
- }
- # Put a corresponding archlib directory in front of $path if it
- # looks like $path has an archlib directory below it.
- my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir)
- = _get_dirs($path);
- unshift(@INC, $arch_dir) if -d $arch_auto_dir;
- unshift(@INC, $version_dir) if -d $version_dir;
- unshift(@INC, $version_arch_dir) if -d $version_arch_dir;
- }
-
- # remove trailing duplicates
- @INC = grep { ++$names{$_} == 1 } @INC;
- return;
- }
-
-
- sub unimport {
- shift;
-
- my %names;
- foreach (@_) {
- my $path = _nativize($_);
-
- my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir)
- = _get_dirs($path);
- ++$names{$path};
- ++$names{$arch_dir} if -d $arch_auto_dir;
- ++$names{$version_dir} if -d $version_dir;
- ++$names{$version_arch_dir} if -d $version_arch_dir;
- }
-
- # Remove ALL instances of each named directory.
- @INC = grep { !exists $names{$_} } @INC;
- return;
- }
-
- sub _get_dirs {
- my($dir) = @_;
- my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir);
-
- # we could use this for all platforms in the future, but leave it
- # Mac-only for now, until there is more time for testing it.
- if ($Is_MacOS) {
- $arch_auto_dir = File::Spec->catdir( $dir, $archname, 'auto' );
- $arch_dir = File::Spec->catdir( $dir, $archname, );
- $version_dir = File::Spec->catdir( $dir, $version );
- $version_arch_dir = File::Spec->catdir( $dir, $version, $archname );
- } else {
- $arch_auto_dir = "$dir/$archname/auto";
- $arch_dir = "$dir/$archname";
- $version_dir = "$dir/$version";
- $version_arch_dir = "$dir/$version/$archname";
- }
- return($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir);
- }
-
- sub _nativize {
- my($dir) = @_;
-
- if ($Is_MacOS && $Mac_FS && ! -d $dir) {
- $dir = Mac::FileSpec::Unixish::nativize($dir);
- $dir .= ":" unless $dir =~ /:$/;
- }
-
- return $dir;
- }
-
- 1;
- __END__
-
- =head1 NAME
-
- lib - manipulate @INC at compile time
-
- =head1 SYNOPSIS
-
- use lib LIST;
-
- no lib LIST;
-
- =head1 DESCRIPTION
-
- This is a small simple module which simplifies the manipulation of @INC
- at compile time.
-
- It is typically used to add extra directories to perl's search path so
- that later C<use> or C<require> statements will find modules which are
- not located on perl's default search path.
-
- =head2 Adding directories to @INC
-
- The parameters to C<use lib> are added to the start of the perl search
- path. Saying
-
- use lib LIST;
-
- is I<almost> the same as saying
-
- BEGIN { unshift(@INC, LIST) }
-
- For each directory in LIST (called $dir here) the lib module also
- checks to see if a directory called $dir/$archname/auto exists.
- If so the $dir/$archname directory is assumed to be a corresponding
- architecture specific directory and is added to @INC in front of $dir.
-
- To avoid memory leaks, all trailing duplicate entries in @INC are
- removed.
-
- =head2 Deleting directories from @INC
-
- You should normally only add directories to @INC. If you need to
- delete directories from @INC take care to only delete those which you
- added yourself or which you are certain are not needed by other modules
- in your script. Other modules may have added directories which they
- need for correct operation.
-
- The C<no lib> statement deletes all instances of each named directory
- from @INC.
-
- For each directory in LIST (called $dir here) the lib module also
- checks to see if a directory called $dir/$archname/auto exists.
- If so the $dir/$archname directory is assumed to be a corresponding
- architecture specific directory and is also deleted from @INC.
-
- =head2 Restoring original @INC
-
- When the lib module is first loaded it records the current value of @INC
- in an array C<@lib::ORIG_INC>. To restore @INC to that value you
- can say
-
- @INC = @lib::ORIG_INC;
-
- =head1 CAVEATS
-
- In order to keep lib.pm small and simple, it only works with Unix
- filepaths. This doesn't mean it only works on Unix, but non-Unix
- users must first translate their file paths to Unix conventions.
-
- # VMS users wanting to put [.stuff.moo] into
- # their @INC would write
- use lib 'stuff/moo';
-
- =head1 NOTES
-
- In the future, this module will likely use File::Spec for determining
- paths, as it does now for Mac OS (where Unix-style or Mac-style paths
- work, and Unix-style paths are converted properly to Mac-style paths
- before being added to @INC).
-
- =head1 SEE ALSO
-
- FindBin - optional module which deals with paths relative to the source file.
-
- =head1 AUTHOR
-
- Tim Bunce, 2nd June 1995.
-
- =cut
-