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- package File::Spec::Unix;
-
- use strict;
- use vars qw($VERSION);
-
- $VERSION = '3.2501';
-
- sub canonpath {
- my ($self,$path) = @_;
-
- # Handle POSIX-style node names beginning with double slash (qnx, nto)
- # (POSIX says: "a pathname that begins with two successive slashes
- # may be interpreted in an implementation-defined manner, although
- # more than two leading slashes shall be treated as a single slash.")
- my $node = '';
- my $double_slashes_special = $^O eq 'qnx' || $^O eq 'nto';
- if ( $double_slashes_special && $path =~ s{^(//[^/]+)(?:/|\z)}{/}s ) {
- $node = $1;
- }
- # This used to be
- # $path =~ s|/+|/|g unless ($^O eq 'cygwin');
- # but that made tests 29, 30, 35, 46, and 213 (as of #13272) to fail
- # (Mainly because trailing "" directories didn't get stripped).
- # Why would cygwin avoid collapsing multiple slashes into one? --jhi
- $path =~ s|/{2,}|/|g; # xx////xx -> xx/xx
- $path =~ s{(?:/\.)+(?:/|\z)}{/}g; # xx/././xx -> xx/xx
- $path =~ s|^(?:\./)+||s unless $path eq "./"; # ./xx -> xx
- $path =~ s|^/(?:\.\./)+|/|; # /../../xx -> xx
- $path =~ s|^/\.\.$|/|; # /.. -> /
- $path =~ s|/\z|| unless $path eq "/"; # xx/ -> xx
- return "$node$path";
- }
-
- sub catdir {
- my $self = shift;
-
- $self->canonpath(join('/', @_, '')); # '' because need a trailing '/'
- }
-
- sub catfile {
- my $self = shift;
- my $file = $self->canonpath(pop @_);
- return $file unless @_;
- my $dir = $self->catdir(@_);
- $dir .= "/" unless substr($dir,-1) eq "/";
- return $dir.$file;
- }
-
- sub curdir () { '.' }
-
- sub devnull () { '/dev/null' }
-
- sub rootdir () { '/' }
-
- my $tmpdir;
- sub _tmpdir {
- return $tmpdir if defined $tmpdir;
- my $self = shift;
- my @dirlist = @_;
- {
- no strict 'refs';
- if (${"\cTAINT"}) { # Check for taint mode on perl >= 5.8.0
- require Scalar::Util;
- @dirlist = grep { ! Scalar::Util::tainted($_) } @dirlist;
- }
- }
- 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])) {
- shift @pathchunks ;
- shift @basechunks ;
- }
- return $self->curdir unless @pathchunks || @basechunks;
-
- # $base now contains the directories the resulting relative path
- # must ascend out of before it can descend to $path_directory.
- my $result_dirs = $self->catdir( ($self->updir) x @basechunks, @pathchunks );
- return $self->canonpath( $self->catpath('', $result_dirs, '') );
- }
-
- sub _same {
- $_[1] eq $_[2];
- }
-
- sub rel2abs {
- my ($self,$path,$base ) = @_;
-
- # Clean up $path
- if ( ! $self->file_name_is_absolute( $path ) ) {
- # Figure out the effective $base and clean it up.
- if ( !defined( $base ) || $base eq '' ) {
- $base = $self->_cwd();
- }
- elsif ( ! $self->file_name_is_absolute( $base ) ) {
- $base = $self->rel2abs( $base ) ;
- }
- else {
- $base = $self->canonpath( $base ) ;
- }
-
- # Glom them together
- $path = $self->catdir( $base, $path ) ;
- }
-
- return $self->canonpath( $path ) ;
- }
-
- # Internal routine to File::Spec, no point in making this public since
- # it is the standard Cwd interface. Most of the platform-specific
- # File::Spec subclasses use this.
- sub _cwd {
- require Cwd;
- Cwd::getcwd();
- }
-
- # Internal method to reduce xx\..\yy -> yy
- sub _collapse {
- my($fs, $path) = @_;
-
- my $updir = $fs->updir;
- my $curdir = $fs->curdir;
-
- my($vol, $dirs, $file) = $fs->splitpath($path);
- my @dirs = $fs->splitdir($dirs);
- pop @dirs if @dirs && $dirs[-1] eq '';
-
- my @collapsed;
- foreach my $dir (@dirs) {
- if( $dir eq $updir and # if we have an updir
- @collapsed and # and something to collapse
- length $collapsed[-1] and # and its not the rootdir
- $collapsed[-1] ne $updir and # nor another updir
- $collapsed[-1] ne $curdir # nor the curdir
- )
- { # then
- pop @collapsed; # collapse
- }
- else { # else
- push @collapsed, $dir; # just hang onto it
- }
- }
-
- return $fs->catpath($vol,
- $fs->catdir(@collapsed),
- $file
- );
- }
-
- 1;
-