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package File::Spec::VMS;
use strict;
use vars qw(@ISA);
require File::Spec::Unix;
@ISA = qw(File::Spec::Unix);
use File::Basename;
use VMS::Filespec;
=head1 NAME
File::Spec::VMS - methods for VMS file specs
=head1 SYNOPSIS
require File::Spec::VMS; # Done internally by File::Spec if needed
=head1 DESCRIPTION
See File::Spec::Unix for a documentation of the methods provided
there. This package overrides the implementation of these methods, not
the semantics.
=cut
sub eliminate_macros {
my($self,$path) = @_;
return '' unless $path;
$self = {} unless ref $self;
my($npath) = unixify($path);
my($complex) = 0;
my($head,$macro,$tail);
# perform m##g in scalar context so it acts as an iterator
while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#g) {
if ($self->{$2}) {
($head,$macro,$tail) = ($1,$2,$3);
if (ref $self->{$macro}) {
if (ref $self->{$macro} eq 'ARRAY') {
$macro = join ' ', @{$self->{$macro}};
}
else {
print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}),
"\n\t(using MMK-specific deferred substitutuon; MMS will break)\n";
$macro = "\cB$macro\cB";
$complex = 1;
}
}
else { ($macro = unixify($self->{$macro})) =~ s#/$##; }
$npath = "$head$macro$tail";
}
}
if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#g; }
$npath;
}
sub fixpath {
my($self,$path,$force_path) = @_;
return '' unless $path;
$self = bless {} unless ref $self;
my($fixedpath,$prefix,$name);
if ($path =~ m#^\$\([^\)]+\)$# || $path =~ m#[/:>\]]#) {
if ($force_path or $path =~ /(?:DIR\)|\])$/) {
$fixedpath = vmspath($self->eliminate_macros($path));
}
else {
$fixedpath = vmsify($self->eliminate_macros($path));
}
}
elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#)) && $self->{$prefix}) {
my($vmspre) = $self->eliminate_macros("\$($prefix)");
# is it a dir or just a name?
$vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR$/) ? vmspath($vmspre) : '';
$fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name;
$fixedpath = vmspath($fixedpath) if $force_path;
}
else {
$fixedpath = $path;
$fixedpath = vmspath($fixedpath) if $force_path;
}
# No hints, so we try to guess
if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) {
$fixedpath = vmspath($fixedpath) if -d $fixedpath;
}
# Trim off root dirname if it's had other dirs inserted in front of it.
$fixedpath =~ s/\.000000([\]>])/$1/;
$fixedpath;
}
=head2 Methods always loaded
=over
=item catdir
Concatenates a list of file specifications, and returns the result as a
VMS-syntax directory specification.
=cut
sub catdir {
my ($self,@dirs) = @_;
my $dir = pop @dirs;
@dirs = grep($_,@dirs);
my $rslt;
if (@dirs) {
my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs));
my ($spath,$sdir) = ($path,$dir);
$spath =~ s/.dir$//; $sdir =~ s/.dir$//;
$sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+$/;
$rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1);
}
else {
if ($dir =~ /^\$\([^\)]+\)$/) { $rslt = $dir; }
else { $rslt = vmspath($dir); }
}
return $rslt;
}
=item catfile
Concatenates a list of file specifications, and returns the result as a
VMS-syntax directory specification.
=cut
sub catfile {
my ($self,@files) = @_;
my $file = pop @files;
@files = grep($_,@files);
my $rslt;
if (@files) {
my $path = (@files == 1 ? $files[0] : $self->catdir(@files));
my $spath = $path;
$spath =~ s/.dir$//;
if ($spath =~ /^[^\)\]\/:>]+\)$/ && basename($file) eq $file) {
$rslt = "$spath$file";
}
else {
$rslt = $self->eliminate_macros($spath);
$rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file));
}
}
else { $rslt = vmsify($file); }
return $rslt;
}
=item curdir (override)
Returns a string representation of the current directory: '[]'
=cut
sub curdir {
return '[]';
}
=item devnull (override)
Returns a string representation of the null device: '_NLA0:'
=cut
sub devnull {
return "_NLA0:";
}
=item rootdir (override)
Returns a string representation of the root directory: 'SYS$DISK:[000000]'
=cut
sub rootdir {
return 'SYS$DISK:[000000]';
}
=item tmpdir (override)
Returns a string representation of the first writable directory
from the following list or '' if none are writable:
/sys$scratch
$ENV{TMPDIR}
=cut
my $tmpdir;
sub tmpdir {
return $tmpdir if defined $tmpdir;
foreach ('/sys$scratch', $ENV{TMPDIR}) {
next unless defined && -d && -w _;
$tmpdir = $_;
last;
}
$tmpdir = '' unless defined $tmpdir;
return $tmpdir;
}
=item updir (override)
Returns a string representation of the parent directory: '[-]'
=cut
sub updir {
return '[-]';
}
=item path (override)
Translate logical name DCL$PATH as a searchlist, rather than trying
to C<split> string value of C<$ENV{'PATH'}>.
=cut
sub path {
my (@dirs,$dir,$i);
while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); }
return @dirs;
}
=item file_name_is_absolute (override)
Checks for VMS directory spec as well as Unix separators.
=cut
sub file_name_is_absolute {
my ($self,$file) = @_;
# If it's a logical name, expand it.
$file = $ENV{$file} while $file =~ /^[\w\$\-]+$/ && $ENV{$file};
return scalar($file =~ m!^/! ||
$file =~ m![<\[][^.\-\]>]! ||
$file =~ /:[^<\[]/);
}
=back
=head1 SEE ALSO
L<File::Spec>
=cut
1;
|
