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270 lines
7.3 KiB
Perl
270 lines
7.3 KiB
Perl
package File::Spec::Unix;
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use strict;
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use vars qw($VERSION);
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$VERSION = '3.30';
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$VERSION = eval $VERSION;
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sub canonpath {
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my ($self,$path) = @_;
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return unless defined $path;
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# Handle POSIX-style node names beginning with double slash (qnx, nto)
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# (POSIX says: "a pathname that begins with two successive slashes
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# may be interpreted in an implementation-defined manner, although
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# more than two leading slashes shall be treated as a single slash.")
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my $node = '';
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my $double_slashes_special = $^O eq 'qnx' || $^O eq 'nto';
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if ( $double_slashes_special
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&& ( $path =~ s{^(//[^/]+)/?\z}{}s || $path =~ s{^(//[^/]+)/}{/}s ) ) {
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$node = $1;
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}
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# This used to be
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# $path =~ s|/+|/|g unless ($^O eq 'cygwin');
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# but that made tests 29, 30, 35, 46, and 213 (as of #13272) to fail
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# (Mainly because trailing "" directories didn't get stripped).
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# Why would cygwin avoid collapsing multiple slashes into one? --jhi
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$path =~ s|/{2,}|/|g; # xx////xx -> xx/xx
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$path =~ s{(?:/\.)+(?:/|\z)}{/}g; # xx/././xx -> xx/xx
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$path =~ s|^(?:\./)+||s unless $path eq "./"; # ./xx -> xx
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$path =~ s|^/(?:\.\./)+|/|; # /../../xx -> xx
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$path =~ s|^/\.\.$|/|; # /.. -> /
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$path =~ s|/\z|| unless $path eq "/"; # xx/ -> xx
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return "$node$path";
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}
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sub catdir {
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my $self = shift;
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$self->canonpath(join('/', @_, '')); # '' because need a trailing '/'
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}
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sub catfile {
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my $self = shift;
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my $file = $self->canonpath(pop @_);
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return $file unless @_;
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my $dir = $self->catdir(@_);
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$dir .= "/" unless substr($dir,-1) eq "/";
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return $dir.$file;
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}
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sub curdir { '.' }
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sub devnull { '/dev/null' }
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sub rootdir { '/' }
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my $tmpdir;
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sub _tmpdir {
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return $tmpdir if defined $tmpdir;
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my $self = shift;
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my @dirlist = @_;
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{
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no strict 'refs';
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if (${"\cTAINT"}) { # Check for taint mode on perl >= 5.8.0
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require Scalar::Util;
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@dirlist = grep { ! Scalar::Util::tainted($_) } @dirlist;
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}
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}
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foreach (@dirlist) {
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next unless defined && -d && -w _;
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$tmpdir = $_;
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last;
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}
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$tmpdir = $self->curdir unless defined $tmpdir;
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$tmpdir = defined $tmpdir && $self->canonpath($tmpdir);
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return $tmpdir;
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}
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sub tmpdir {
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return $tmpdir if defined $tmpdir;
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$tmpdir = $_[0]->_tmpdir( $ENV{TMPDIR}, "/tmp" );
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}
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sub updir { '..' }
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sub no_upwards {
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my $self = shift;
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return grep(!/^\.{1,2}\z/s, @_);
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}
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sub case_tolerant { 0 }
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sub file_name_is_absolute {
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my ($self,$file) = @_;
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return scalar($file =~ m:^/:s);
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}
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sub path {
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return () unless exists $ENV{PATH};
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my @path = split(':', $ENV{PATH});
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foreach (@path) { $_ = '.' if $_ eq '' }
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return @path;
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}
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sub join {
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my $self = shift;
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return $self->catfile(@_);
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}
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sub splitpath {
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my ($self,$path, $nofile) = @_;
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my ($volume,$directory,$file) = ('','','');
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if ( $nofile ) {
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$directory = $path;
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}
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else {
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$path =~ m|^ ( (?: .* / (?: \.\.?\z )? )? ) ([^/]*) |xs;
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$directory = $1;
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$file = $2;
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}
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return ($volume,$directory,$file);
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}
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sub splitdir {
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return split m|/|, $_[1], -1; # Preserve trailing fields
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}
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sub catpath {
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my ($self,$volume,$directory,$file) = @_;
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if ( $directory ne '' &&
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$file ne '' &&
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substr( $directory, -1 ) ne '/' &&
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substr( $file, 0, 1 ) ne '/'
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) {
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$directory .= "/$file" ;
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}
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else {
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$directory .= $file ;
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}
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return $directory ;
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}
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sub abs2rel {
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my($self,$path,$base) = @_;
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$base = $self->_cwd() unless defined $base and length $base;
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($path, $base) = map $self->canonpath($_), $path, $base;
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if (grep $self->file_name_is_absolute($_), $path, $base) {
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($path, $base) = map $self->rel2abs($_), $path, $base;
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}
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else {
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# save a couple of cwd()s if both paths are relative
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($path, $base) = map $self->catdir('/', $_), $path, $base;
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}
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my ($path_volume) = $self->splitpath($path, 1);
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my ($base_volume) = $self->splitpath($base, 1);
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# Can't relativize across volumes
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return $path unless $path_volume eq $base_volume;
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my $path_directories = ($self->splitpath($path, 1))[1];
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my $base_directories = ($self->splitpath($base, 1))[1];
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# For UNC paths, the user might give a volume like //foo/bar that
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# strictly speaking has no directory portion. Treat it as if it
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# had the root directory for that volume.
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if (!length($base_directories) and $self->file_name_is_absolute($base)) {
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$base_directories = $self->rootdir;
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}
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# Now, remove all leading components that are the same
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my @pathchunks = $self->splitdir( $path_directories );
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my @basechunks = $self->splitdir( $base_directories );
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if ($base_directories eq $self->rootdir) {
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shift @pathchunks;
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return $self->canonpath( $self->catpath('', $self->catdir( @pathchunks ), '') );
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}
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while (@pathchunks && @basechunks && $self->_same($pathchunks[0], $basechunks[0])) {
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shift @pathchunks ;
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shift @basechunks ;
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}
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return $self->curdir unless @pathchunks || @basechunks;
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# $base now contains the directories the resulting relative path
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# must ascend out of before it can descend to $path_directory.
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my $result_dirs = $self->catdir( ($self->updir) x @basechunks, @pathchunks );
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return $self->canonpath( $self->catpath('', $result_dirs, '') );
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}
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sub _same {
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$_[1] eq $_[2];
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}
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sub rel2abs {
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my ($self,$path,$base ) = @_;
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# Clean up $path
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if ( ! $self->file_name_is_absolute( $path ) ) {
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# Figure out the effective $base and clean it up.
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if ( !defined( $base ) || $base eq '' ) {
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$base = $self->_cwd();
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}
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elsif ( ! $self->file_name_is_absolute( $base ) ) {
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$base = $self->rel2abs( $base ) ;
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}
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else {
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$base = $self->canonpath( $base ) ;
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}
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# Glom them together
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$path = $self->catdir( $base, $path ) ;
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}
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return $self->canonpath( $path ) ;
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}
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# Internal routine to File::Spec, no point in making this public since
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# it is the standard Cwd interface. Most of the platform-specific
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# File::Spec subclasses use this.
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sub _cwd {
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require Cwd;
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Cwd::getcwd();
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}
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# Internal method to reduce xx\..\yy -> yy
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sub _collapse {
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my($fs, $path) = @_;
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my $updir = $fs->updir;
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my $curdir = $fs->curdir;
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my($vol, $dirs, $file) = $fs->splitpath($path);
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my @dirs = $fs->splitdir($dirs);
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pop @dirs if @dirs && $dirs[-1] eq '';
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my @collapsed;
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foreach my $dir (@dirs) {
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if( $dir eq $updir and # if we have an updir
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@collapsed and # and something to collapse
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length $collapsed[-1] and # and its not the rootdir
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$collapsed[-1] ne $updir and # nor another updir
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$collapsed[-1] ne $curdir # nor the curdir
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)
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{ # then
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pop @collapsed; # collapse
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}
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else { # else
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push @collapsed, $dir; # just hang onto it
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}
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}
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return $fs->catpath($vol,
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$fs->catdir(@collapsed),
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$file
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);
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}
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1;
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