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cpansmokebox/inc/bundle/File/Spec/Unix.pm  view on Meta::CPAN

    foreach (@dirlist) {
	next unless defined && -d && -w _;
	$tmpdir = $_;
	last;
    }
    $tmpdir = $self->curdir unless defined $tmpdir;
    $tmpdir = defined $tmpdir && $self->canonpath($tmpdir);
    return $tmpdir;
}

sub tmpdir {
    return $tmpdir if defined $tmpdir;
    $tmpdir = $_[0]->_tmpdir( $ENV{TMPDIR}, "/tmp" );
}

sub updir { '..' }

sub no_upwards {
    my $self = shift;
    return grep(!/^\.{1,2}\z/s, @_);
}

sub case_tolerant { 0 }

sub file_name_is_absolute {
    my ($self,$file) = @_;
    return scalar($file =~ m:^/:s);
}

sub path {
    return () unless exists $ENV{PATH};
    my @path = split(':', $ENV{PATH});
    foreach (@path) { $_ = '.' if $_ eq '' }
    return @path;
}

sub join {
    my $self = shift;
    return $self->catfile(@_);
}

sub splitpath {
    my ($self,$path, $nofile) = @_;

    my ($volume,$directory,$file) = ('','','');

    if ( $nofile ) {
        $directory = $path;
    }
    else {
        $path =~ m|^ ( (?: .* / (?: \.\.?\z )? )? ) ([^/]*) |xs;
        $directory = $1;
        $file      = $2;
    }

    return ($volume,$directory,$file);
}


sub splitdir {
    return split m|/|, $_[1], -1;  # Preserve trailing fields
}


sub catpath {
    my ($self,$volume,$directory,$file) = @_;

    if ( $directory ne ''                && 
         $file ne ''                     && 
         substr( $directory, -1 ) ne '/' && 
         substr( $file, 0, 1 ) ne '/' 
    ) {
        $directory .= "/$file" ;
    }
    else {
        $directory .= $file ;
    }

    return $directory ;
}

sub abs2rel {
    my($self,$path,$base) = @_;
    $base = $self->_cwd() unless defined $base and length $base;

    ($path, $base) = map $self->canonpath($_), $path, $base;

    if (grep $self->file_name_is_absolute($_), $path, $base) {
	($path, $base) = map $self->rel2abs($_), $path, $base;
    }
    else {
	# save a couple of cwd()s if both paths are relative
	($path, $base) = map $self->catdir('/', $_), $path, $base;
    }

    my ($path_volume) = $self->splitpath($path, 1);
    my ($base_volume) = $self->splitpath($base, 1);

    # Can't relativize across volumes
    return $path unless $path_volume eq $base_volume;

    my $path_directories = ($self->splitpath($path, 1))[1];
    my $base_directories = ($self->splitpath($base, 1))[1];

    # For UNC paths, the user might give a volume like //foo/bar that
    # strictly speaking has no directory portion.  Treat it as if it
    # had the root directory for that volume.
    if (!length($base_directories) and $self->file_name_is_absolute($base)) {
      $base_directories = $self->rootdir;
    }

    # Now, remove all leading components that are the same
    my @pathchunks = $self->splitdir( $path_directories );
    my @basechunks = $self->splitdir( $base_directories );

    if ($base_directories eq $self->rootdir) {
      shift @pathchunks;
      return $self->canonpath( $self->catpath('', $self->catdir( @pathchunks ), '') );
    }

    while (@pathchunks && @basechunks && $self->_same($pathchunks[0], $basechunks[0])) {