-
package File::Spec::VMS;
-use Carp qw( &carp );
-use Config;
-require Exporter;
-use VMS::Filespec;
-use File::Basename;
-
-use File::Spec;
-use vars qw($Revision);
-$Revision = '5.3901 (6-Mar-1997)';
-
+use strict;
+use vars qw(@ISA);
+require File::Spec::Unix;
@ISA = qw(File::Spec::Unix);
-Exporter::import('File::Spec', '$Verbose');
+use Cwd;
+use File::Basename;
+use VMS::Filespec;
=head1 NAME
=head1 SYNOPSIS
- use File::Spec::VMS; # Done internally by File::Spec if needed
+ require File::Spec::VMS; # Done internally by File::Spec if needed
=head1 DESCRIPTION
there. This package overrides the implementation of these methods, not
the semantics.
+=over
+
+=item eliminate_macros
+
+Expands MM[KS]/Make macros in a text string, using the contents of
+identically named elements of C<%$self>, and returns the result
+as a file specification in Unix syntax.
+
+=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#(.*?)\$\((\S+?)\)(.*)#gs) {
+ 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#/\z##; }
+ $npath = "$head$macro$tail";
+ }
+ }
+ if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; }
+ $npath;
+}
+
+=item fixpath
+
+Catchall routine to clean up problem MM[SK]/Make macros. Expands macros
+in any directory specification, in order to avoid juxtaposing two
+VMS-syntax directories when MM[SK] is run. Also expands expressions which
+are all macro, so that we can tell how long the expansion is, and avoid
+overrunning DCL's command buffer when MM[KS] is running.
+
+If optional second argument has a TRUE value, then the return string is
+a VMS-syntax directory specification, if it is FALSE, the return string
+is a VMS-syntax file specification, and if it is not specified, fixpath()
+checks to see whether it matches the name of a directory in the current
+default directory, and returns a directory or file specification accordingly.
+
+=cut
+
+sub fixpath {
+ my($self,$path,$force_path) = @_;
+ return '' unless $path;
+ $self = bless {} unless ref $self;
+ my($fixedpath,$prefix,$name);
+
+ if ($path =~ m#^\$\([^\)]+\)\z#s || $path =~ m#[/:>\]]#) {
+ if ($force_path or $path =~ /(?:DIR\)|\])\z/) {
+ $fixedpath = vmspath($self->eliminate_macros($path));
+ }
+ else {
+ $fixedpath = vmsify($self->eliminate_macros($path));
+ }
+ }
+ elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) {
+ my($vmspre) = $self->eliminate_macros("\$($prefix)");
+ # is it a dir or just a name?
+ $vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\z/) ? vmspath($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([\]>])/$1/;
+ # Special case for VMS absolute directory specs: these will have had device
+ # prepended during trip through Unix syntax in eliminate_macros(), since
+ # Unix syntax has no way to express "absolute from the top of this device's
+ # directory tree".
+ if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; }
+ $fixedpath;
+}
+
+=back
+
=head2 Methods always loaded
=over
+=item canonpath (override)
+
+Removes redundant portions of file specifications according to VMS syntax.
+
+=cut
+
+sub canonpath {
+ my($self,$path) = @_;
+
+ if ($path =~ m|/|) { # Fake Unix
+ my $pathify = $path =~ m|/\z|;
+ $path = $self->SUPER::canonpath($path);
+ if ($pathify) { return vmspath($path); }
+ else { return vmsify($path); }
+ }
+ else {
+ $path =~ s-\]\[--g; $path =~ s/><//g; # foo.][bar ==> foo.bar
+ $path =~ s/([\[<])000000\./$1/; # [000000.foo ==> foo
+ 1 while $path =~ s{([\[<-])\.-}{$1-}; # [.-.- ==> [--
+ $path =~ s/\.[^\[<\.]+\.-([\]\>])/$1/; # bar.foo.-] ==> bar]
+ $path =~ s/([\[<])(-+)/$1 . "\cx" x length($2)/e; # encode leading '-'s
+ $path =~ s/([\[<\.])([^\[<\.\cx]+)\.-\.?/$1/g; # bar.-.foo ==> foo
+ $path =~ s/([\[<])(\cx+)/$1 . '-' x length($2)/e; # then decode
+ return $path;
+ }
+}
+
=item catdir
Concatenates a list of file specifications, and returns the result as a
-VMS-syntax directory specification.
+VMS-syntax directory specification. No check is made for "impossible"
+cases (e.g. elements other than the first being absolute filespecs).
=cut
sub catdir {
- my($self,@dirs) = @_;
- my($dir) = pop @dirs;
+ my ($self,@dirs) = @_;
+ my $dir = pop @dirs;
@dirs = grep($_,@dirs);
- my($rslt);
+ 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);
+ my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs));
+ my ($spath,$sdir) = ($path,$dir);
+ $spath =~ s/\.dir\z//; $sdir =~ s/\.dir\z//;
+ $sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+\z/s;
+ $rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1);
+
+ # Special case for VMS absolute directory specs: these will have had device
+ # prepended during trip through Unix syntax in eliminate_macros(), since
+ # Unix syntax has no way to express "absolute from the top of this device's
+ # directory tree".
+ if ($spath =~ /^[\[<][^.\-]/s) { $rslt =~ s/^[^\[<]+//s; }
}
- else {
- if ($dir =~ /^\$\([^\)]+\)$/) { $rslt = $dir; }
- else { $rslt = vmspath($dir); }
+ else {
+ if (not defined $dir or not length $dir) { $rslt = ''; }
+ elsif ($dir =~ /^\$\([^\)]+\)\z/s) { $rslt = $dir; }
+ else { $rslt = vmspath($dir); }
}
- print "catdir(",join(',',@_[1..$#_]),") = |$rslt|\n" if $Verbose >= 3;
- $rslt;
+ return $self->canonpath($rslt);
}
=item catfile
Concatenates a list of file specifications, and returns the result as a
-VMS-syntax directory specification.
+VMS-syntax file specification.
=cut
sub catfile {
- my($self,@files) = @_;
- my($file) = pop @files;
+ my ($self,@files) = @_;
+ my $file = pop @files;
@files = grep($_,@files);
- my($rslt);
+ 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));
- }
+ my $path = (@files == 1 ? $files[0] : $self->catdir(@files));
+ my $spath = $path;
+ $spath =~ s/\.dir\z//;
+ if ($spath =~ /^[^\)\]\/:>]+\)\z/s && basename($file) eq $file) {
+ $rslt = "$spath$file";
+ }
+ else {
+ $rslt = $self->eliminate_macros($spath);
+ $rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file));
+ }
}
- else { $rslt = vmsify($file); }
- print "catfile(",join(',',@_[1..$#_]),") = |$rslt|\n" if $Verbose >= 3;
- $rslt;
+ else { $rslt = (defined($file) && length($file)) ? vmsify($file) : ''; }
+ return $self->canonpath($rslt);
}
+
=item curdir (override)
-Returns a string representing of the current directory.
+Returns a string representation of the current directory: '[]'
=cut
=item devnull (override)
-Returns a string representing the null device.
+Returns a string representation of the null device: '_NLA0:'
=cut
sub devnull {
- return 'NL:';
+ return "_NLA0:";
}
=item rootdir (override)
-Returns a string representing of the root directory.
+Returns a string representation of the root directory: 'SYS$DISK:[000000]'
=cut
sub rootdir {
- return '';
+ return 'SYS$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 $tmpdir;
}
=item updir (override)
-Returns a string representing of the parent directory.
+Returns a string representation of the parent directory: '[-]'
=cut
return '[-]';
}
+=item case_tolerant (override)
+
+VMS file specification syntax is case-tolerant.
+
+=cut
+
+sub case_tolerant {
+ return 1;
+}
+
=item path (override)
Translate logical name DCL$PATH as a searchlist, rather than trying
=cut
sub path {
- my(@dirs,$dir,$i);
+ my (@dirs,$dir,$i);
while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); }
- @dirs;
+ return @dirs;
}
=item file_name_is_absolute (override)
=cut
sub file_name_is_absolute {
- my($self,$file) = @_;
+ my ($self,$file) = @_;
# If it's a logical name, expand it.
- $file = $ENV{$file} while $file =~ /^[\w\$\-]+$/ and $ENV{$file};
- $file =~ m!^/! or $file =~ m![<\[][^.\-\]>]! or $file =~ /:[^<\[]/;
+ $file = $ENV{$file} while $file =~ /^[\w\$\-]+\z/s && $ENV{$file};
+ return scalar($file =~ m!^/!s ||
+ $file =~ m![<\[][^.\-\]>]! ||
+ $file =~ /:[^<\[]/);
}
-1;
-__END__
+=item splitpath (override)
+
+Splits using VMS syntax.
+
+=cut
+
+sub splitpath {
+ my($self,$path) = @_;
+ my($dev,$dir,$file) = ('','','');
+
+ vmsify($path) =~ /(.+:)?([\[<].*[\]>])?(.*)/s;
+ return ($1 || '',$2 || '',$3);
+}
+
+=item splitdir (override)
+
+Split dirspec using VMS syntax.
+
+=cut
+sub splitdir {
+ my($self,$dirspec) = @_;
+ $dirspec =~ s/\]\[//g; $dirspec =~ s/\-\-/-.-/g;
+ $dirspec = "[$dirspec]" unless $dirspec =~ /[\[<]/; # make legal
+ my(@dirs) = split('\.', vmspath($dirspec));
+ $dirs[0] =~ s/^[\[<]//s; $dirs[-1] =~ s/[\]>]\z//s;
+ @dirs;
+}
+
+
+=item catpath (override)
+
+Construct a complete filespec using VMS syntax
+
+=cut
+
+sub catpath {
+ my($self,$dev,$dir,$file) = @_;
+ if ($dev =~ m|^/+([^/]+)|) { $dev = "$1:"; }
+ else { $dev .= ':' unless $dev eq '' or $dev =~ /:\z/; }
+ if (length($dev) or length($dir)) {
+ $dir = "[$dir]" unless $dir =~ /[\[<\/]/;
+ $dir = vmspath($dir);
+ }
+ "$dev$dir$file";
+}
+
+=item abs2rel (override)
+
+Use VMS syntax when converting filespecs.
+
+=cut
+
+sub abs2rel {
+ my $self = shift;
+
+ return vmspath(File::Spec::Unix::abs2rel( $self, @_ ))
+ if ( join( '', @_ ) =~ m{/} ) ;
+
+ my($path,$base) = @_;
+
+ # Note: we use '/' to glue things together here, then let canonpath()
+ # clean them up at the end.
+
+ # Clean up $path
+ if ( ! $self->file_name_is_absolute( $path ) ) {
+ $path = $self->rel2abs( $path ) ;
+ }
+ else {
+ $path = $self->canonpath( $path ) ;
+ }
+
+ # Figure out the effective $base and clean it up.
+ if ( !defined( $base ) || $base eq '' ) {
+ $base = cwd() ;
+ }
+ elsif ( ! $self->file_name_is_absolute( $base ) ) {
+ $base = $self->rel2abs( $base ) ;
+ }
+ else {
+ $base = $self->canonpath( $base ) ;
+ }
+
+ # Split up paths
+ my ( undef, $path_directories, $path_file ) =
+ $self->splitpath( $path, 1 ) ;
+
+ $path_directories = $1
+ if $path_directories =~ /^\[(.*)\]\z/s ;
+
+ my ( undef, $base_directories, undef ) =
+ $self->splitpath( $base, 1 ) ;
+
+ $base_directories = $1
+ if $base_directories =~ /^\[(.*)\]\z/s ;
+
+ # Now, remove all leading components that are the same
+ my @pathchunks = $self->splitdir( $path_directories );
+ my @basechunks = $self->splitdir( $base_directories );
+
+ while ( @pathchunks &&
+ @basechunks &&
+ lc( $pathchunks[0] ) eq lc( $basechunks[0] )
+ ) {
+ shift @pathchunks ;
+ shift @basechunks ;
+ }
+
+ # @basechunks now contains the directories to climb out of,
+ # @pathchunks now has the directories to descend in to.
+ $path_directories = '-.' x @basechunks . join( '.', @pathchunks ) ;
+ $path_directories =~ s{\.\z}{} ;
+ return $self->canonpath( $self->catpath( '', $path_directories, $path_file ) ) ;
+}
+
+
+=item rel2abs (override)
+
+Use VMS syntax when converting filespecs.
+
+=cut
+
+sub rel2abs($;$;) {
+ my $self = shift ;
+ return vmspath(File::Spec::Unix::rel2abs( $self, @_ ))
+ if ( join( '', @_ ) =~ m{/} ) ;
+
+ my ($path,$base ) = @_;
+ # Clean up and split up $path
+ if ( ! $self->file_name_is_absolute( $path ) ) {
+ # Figure out the effective $base and clean it up.
+ if ( !defined( $base ) || $base eq '' ) {
+ $base = cwd() ;
+ }
+ elsif ( ! $self->file_name_is_absolute( $base ) ) {
+ $base = $self->rel2abs( $base ) ;
+ }
+ else {
+ $base = $self->canonpath( $base ) ;
+ }
+
+ # Split up paths
+ my ( undef, $path_directories, $path_file ) =
+ $self->splitpath( $path ) ;
+
+ my ( $base_volume, $base_directories, undef ) =
+ $self->splitpath( $base ) ;
+
+ $path_directories = '' if $path_directories eq '[]' ||
+ $path_directories eq '<>';
+ my $sep = '' ;
+ $sep = '.'
+ if ( $base_directories =~ m{[^.\]>]\z} &&
+ $path_directories =~ m{^[^.\[<]}s
+ ) ;
+ $base_directories = "$base_directories$sep$path_directories";
+ $base_directories =~ s{\.?[\]>][\[<]\.?}{.};
+
+ $path = $self->catpath( $base_volume, $base_directories, $path_file );
+ }
+
+ return $self->canonpath( $path ) ;
+}
+
+
+=back
+
+=head1 SEE ALSO
+
+L<File::Spec>
+
+=cut
+
+1;
projects / p5sagit/p5-mst-13.2.git / blobdiff