Mac.pm revision 7c478bd95313f5f23a4c958a745db2134aa03244
use strict;
$VERSION = '1.2';
=head1 NAME
File::Spec::Mac - File::Spec for MacOS
=head1 SYNOPSIS
require File::Spec::Mac; # Done internally by File::Spec if needed
=head1 DESCRIPTION
Methods for manipulating file specifications.
=head1 METHODS
=over 2
=item canonpath
On MacOS, there's nothing to be done. Returns what it's given.
=cut
sub canonpath {
return $path;
}
=item catdir
Concatenate two or more directory names to form a complete path ending with
a directory. Put a trailing : on the end of the complete path if there
isn't one, because that's what's done in MacPerl's environment.
The fundamental requirement of this routine is that
File::Spec->catdir(split(":",$path)) eq $path
But because of the nature of Macintosh paths, some additional
possibilities are allowed to make using this routine give reasonable results
for some common situations. Here are the rules that are used. Each
argument has its trailing ":" removed. Each argument, except the first,
has its leading ":" removed. They are then joined together by a ":".
So
File::Spec->catdir("a","b") = "a:b:"
File::Spec->catdir("a:",":b") = "a:b:"
File::Spec->catdir("a:","b") = "a:b:"
File::Spec->catdir("a",":b") = "a:b"
File::Spec->catdir("a","","b") = "a::b"
etc.
To get a relative path (one beginning with :), begin the first argument with :
or put a "" as the first argument.
If you don't want to worry about these rules, never allow a ":" on the ends
of any of the arguments except at the beginning of the first.
Under MacPerl, there is an additional ambiguity. Does the user intend that
File::Spec->catfile("LWP","Protocol","http.pm")
be relative or absolute? There's no way of telling except by checking for the
existence of LWP: or :LWP, and even there he may mean a dismounted volume or
a relative path in a different directory (like in @INC). So those checks
aren't done here. This routine will treat this as absolute.
=cut
sub catdir {
shift;
my @args = @_;
$result =~ s/:\Z(?!\n)//;
foreach (@args) {
s/:\Z(?!\n)//;
s/^://s;
$result .= ":$_";
}
return "$result:";
}
=item catfile
Concatenate one or more directory names and a filename to form a
complete path ending with a filename. Since this uses catdir, the
same caveats apply. Note that the leading : is removed from the filename,
so that
File::Spec->catfile($ENV{HOME},"file");
and
File::Spec->catfile($ENV{HOME},":file");
give the same answer, as one might expect.
=cut
sub catfile {
my $self = shift;
my $file = pop @_;
return $file unless @_;
$file =~ s/^://s;
}
=item curdir
Returns a string representing the current directory.
=cut
sub curdir {
return ":";
}
=item devnull
Returns a string representing the null device.
=cut
sub devnull {
return "Dev:Null";
}
=item rootdir
Returns a string representing the root directory. Under MacPerl,
returns the name of the startup volume, since that's the closest in
concept, although other volumes aren't rooted there.
=cut
sub rootdir {
#
# There's no real root directory on MacOS. The name of the startup
# volume is returned, since that's the closest in concept.
#
$system =~ s/:.*\Z(?!\n)/:/s;
return $system;
}
=item tmpdir
Returns a string representation of the first existing directory
from the following list or '' if none exist:
$ENV{TMPDIR}
=cut
my $tmpdir;
sub tmpdir {
return $tmpdir;
}
=item updir
Returns a string representing the parent directory.
=cut
sub updir {
return "::";
}
=item file_name_is_absolute
Takes as argument a path and returns true, if it is an absolute path. In
the case where a name can be either relative or absolute (for example, a
folder named "HD" in the current working directory on a drive named "HD"),
relative wins. Use ":" in the appropriate place in the path if you want to
distinguish unambiguously.
As a special case, the file name '' is always considered to be absolute.
=cut
sub file_name_is_absolute {
if ($file =~ /:/) {
return ($file !~ m/^:/s);
} elsif ( $file eq '' ) {
return 1 ;
} else {
return (! -e ":$file");
}
}
=item path
Returns the null list for the MacPerl application, since the concept is
usually meaningless under MacOS. But if you're using the MacPerl tool under
MPW, it gives back $ENV{Commands} suitably split, as is done in
:lib:ExtUtils:MM_Mac.pm.
=cut
sub path {
#
# The concept is meaningless under the MacPerl application.
# Under MPW, it has a meaning.
#
}
=item splitpath
=cut
sub splitpath {
if ( $nofile ) {
}
else {
$path =~
m@^( (?: [^:]+: )? )
( (?: .*: )? )
( .* )
@xs;
$volume = $1;
$directory = $2;
$file = $3;
}
# Make sure non-empty volumes and directories end in ':'
}
=item splitdir
=cut
sub splitdir {
my ($self,$directories) = @_ ;
#
# split() likes to forget about trailing null fields, so here we
# check to be sure that there will not be any before handling the
# simple case.
#
if ( $directories !~ m@:\Z(?!\n)@ ) {
return split( m@:@, $directories );
}
else {
#
# since there was a trailing separator, add a file name to the end,
# then do the split, then replace it with ''.
#
my( @directories )= split( m@:@, "${directories}dummy" ) ;
$directories[ $#directories ]= '' ;
return @directories ;
}
}
=item catpath
=cut
sub catpath {
my $self = shift ;
my $result = shift ;
$result =~ s@^([^/])@/$1@s ;
my $segment ;
for $segment ( @_ ) {
$result .= "/$segment" ;
}
$result =~ s@/+\Z(?!\n)@/@;
$segment =~ s@^/+@@s;
$result .= "$segment" ;
}
else {
}
}
return $result ;
}
=item abs2rel
Unlike C<File::Spec::Unix->abs2rel()>, this function will make
checks against the local filesystem if necessary. See
L</file_name_is_absolute> for details.
=cut
sub abs2rel {
# Clean up $path
}
# Figure out the effective $base and clean it up.
}
}
# Now, remove all leading components that are the same
shift @pathchunks ;
shift @basechunks ;
}
# @basechunks now contains the number of directories to climb out of.
return "$base:$path" ;
}
=item rel2abs
Unlike C<File::Spec::Unix->rel2abs()>, this function will make
checks against the local filesystem if necessary. See
L</file_name_is_absolute> for details.
=cut
sub rel2abs {
}
}
else {
}
}
return $path ;
}
=back
=head1 SEE ALSO
L<File::Spec>
=cut
1;