mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-12-30 16:47:58 +00:00
270 lines
7.3 KiB
Perl
270 lines
7.3 KiB
Perl
package File::Spec::Unix;
|
|
|
|
use strict;
|
|
use vars qw($VERSION);
|
|
|
|
$VERSION = '3.30';
|
|
$VERSION = eval $VERSION;
|
|
|
|
sub canonpath {
|
|
my ($self,$path) = @_;
|
|
return unless defined $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 || $path =~ s{^(//[^/]+)/}{/}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;
|