david
39292d680f
git-svn-id: https://192.168.0.254/svn/Proyectos.AbetoArmarios_Web/trunk@8 5f5cdc87-09bc-1947-a3a7-c45bb6b47c2a
543 lines
16 KiB
Perl
543 lines
16 KiB
Perl
package File::Spec::VMS;
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use strict;
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use vars qw(@ISA $VERSION);
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require File::Spec::Unix;
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$VERSION = '1.4';
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@ISA = qw(File::Spec::Unix);
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use File::Basename;
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use VMS::Filespec;
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=head1 NAME
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File::Spec::VMS - methods for VMS file specs
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=head1 SYNOPSIS
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require File::Spec::VMS; # Done internally by File::Spec if needed
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=head1 DESCRIPTION
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See File::Spec::Unix for a documentation of the methods provided
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there. This package overrides the implementation of these methods, not
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the semantics.
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=over 4
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=item eliminate_macros
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Expands MM[KS]/Make macros in a text string, using the contents of
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identically named elements of C<%$self>, and returns the result
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as a file specification in Unix syntax.
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=cut
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sub eliminate_macros {
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my($self,$path) = @_;
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return '' unless $path;
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$self = {} unless ref $self;
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if ($path =~ /\s/) {
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return join ' ', map { $self->eliminate_macros($_) } split /\s+/, $path;
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}
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my($npath) = unixify($path);
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my($complex) = 0;
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my($head,$macro,$tail);
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# perform m##g in scalar context so it acts as an iterator
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while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#gs) {
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if ($self->{$2}) {
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($head,$macro,$tail) = ($1,$2,$3);
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if (ref $self->{$macro}) {
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if (ref $self->{$macro} eq 'ARRAY') {
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$macro = join ' ', @{$self->{$macro}};
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}
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else {
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print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}),
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"\n\t(using MMK-specific deferred substitutuon; MMS will break)\n";
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$macro = "\cB$macro\cB";
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$complex = 1;
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}
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}
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else { ($macro = unixify($self->{$macro})) =~ s#/\Z(?!\n)##; }
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$npath = "$head$macro$tail";
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}
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}
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if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; }
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$npath;
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}
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=item fixpath
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Catchall routine to clean up problem MM[SK]/Make macros. Expands macros
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in any directory specification, in order to avoid juxtaposing two
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VMS-syntax directories when MM[SK] is run. Also expands expressions which
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are all macro, so that we can tell how long the expansion is, and avoid
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overrunning DCL's command buffer when MM[KS] is running.
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If optional second argument has a TRUE value, then the return string is
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a VMS-syntax directory specification, if it is FALSE, the return string
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is a VMS-syntax file specification, and if it is not specified, fixpath()
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checks to see whether it matches the name of a directory in the current
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default directory, and returns a directory or file specification accordingly.
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=cut
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sub fixpath {
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my($self,$path,$force_path) = @_;
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return '' unless $path;
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$self = bless {} unless ref $self;
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my($fixedpath,$prefix,$name);
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if ($path =~ /\s/) {
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return join ' ',
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map { $self->fixpath($_,$force_path) }
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split /\s+/, $path;
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}
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if ($path =~ m#^\$\([^\)]+\)\Z(?!\n)#s || $path =~ m#[/:>\]]#) {
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if ($force_path or $path =~ /(?:DIR\)|\])\Z(?!\n)/) {
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$fixedpath = vmspath($self->eliminate_macros($path));
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}
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else {
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$fixedpath = vmsify($self->eliminate_macros($path));
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}
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}
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elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) {
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my($vmspre) = $self->eliminate_macros("\$($prefix)");
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# is it a dir or just a name?
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$vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\Z(?!\n)/) ? vmspath($vmspre) : '';
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$fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name;
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$fixedpath = vmspath($fixedpath) if $force_path;
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}
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else {
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$fixedpath = $path;
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$fixedpath = vmspath($fixedpath) if $force_path;
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}
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# No hints, so we try to guess
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if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) {
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$fixedpath = vmspath($fixedpath) if -d $fixedpath;
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}
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# Trim off root dirname if it's had other dirs inserted in front of it.
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$fixedpath =~ s/\.000000([\]>])/$1/;
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# Special case for VMS absolute directory specs: these will have had device
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# prepended during trip through Unix syntax in eliminate_macros(), since
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# Unix syntax has no way to express "absolute from the top of this device's
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# directory tree".
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if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; }
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$fixedpath;
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}
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=back
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=head2 Methods always loaded
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=over 4
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=item canonpath (override)
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Removes redundant portions of file specifications according to VMS syntax.
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=cut
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sub canonpath {
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my($self,$path) = @_;
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if ($path =~ m|/|) { # Fake Unix
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my $pathify = $path =~ m|/\Z(?!\n)|;
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$path = $self->SUPER::canonpath($path);
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if ($pathify) { return vmspath($path); }
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else { return vmsify($path); }
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}
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else {
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$path =~ tr/<>/[]/; # < and > ==> [ and ]
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$path =~ s/\]\[\./\.\]\[/g; # ][. ==> .][
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$path =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [
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$path =~ s/\[000000\./\[/g; # [000000. ==> [
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$path =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ]
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$path =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar
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1 while ($path =~ s/([\[\.])(-+)\.(-+)([\.\]])/$1$2$3$4/);
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# That loop does the following
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# with any amount of dashes:
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# .-.-. ==> .--.
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# [-.-. ==> [--.
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# .-.-] ==> .--]
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# [-.-] ==> [--]
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1 while ($path =~ s/([\[\.])[^\]\.]+\.-(-+)([\]\.])/$1$2$3/);
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# That loop does the following
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# with any amount (minimum 2)
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# of dashes:
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# .foo.--. ==> .-.
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# .foo.--] ==> .-]
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# [foo.--. ==> [-.
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# [foo.--] ==> [-]
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#
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# And then, the remaining cases
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$path =~ s/\[\.-/[-/; # [.- ==> [-
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$path =~ s/\.[^\]\.]+\.-\./\./g; # .foo.-. ==> .
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$path =~ s/\[[^\]\.]+\.-\./\[/g; # [foo.-. ==> [
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$path =~ s/\.[^\]\.]+\.-\]/\]/g; # .foo.-] ==> ]
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$path =~ s/\[[^\]\.]+\.-\]/\[000000\]/g;# [foo.-] ==> [000000]
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$path =~ s/\[\]//; # [] ==>
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return $path;
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}
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}
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=item catdir
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Concatenates a list of file specifications, and returns the result as a
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VMS-syntax directory specification. No check is made for "impossible"
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cases (e.g. elements other than the first being absolute filespecs).
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=cut
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sub catdir {
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my ($self,@dirs) = @_;
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my $dir = pop @dirs;
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@dirs = grep($_,@dirs);
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my $rslt;
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if (@dirs) {
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my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs));
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my ($spath,$sdir) = ($path,$dir);
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$spath =~ s/\.dir\Z(?!\n)//; $sdir =~ s/\.dir\Z(?!\n)//;
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$sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+\Z(?!\n)/s;
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$rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1);
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# Special case for VMS absolute directory specs: these will have had device
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# prepended during trip through Unix syntax in eliminate_macros(), since
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# Unix syntax has no way to express "absolute from the top of this device's
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# directory tree".
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if ($spath =~ /^[\[<][^.\-]/s) { $rslt =~ s/^[^\[<]+//s; }
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}
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else {
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if (not defined $dir or not length $dir) { $rslt = ''; }
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elsif ($dir =~ /^\$\([^\)]+\)\Z(?!\n)/s) { $rslt = $dir; }
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else { $rslt = vmspath($dir); }
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}
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return $self->canonpath($rslt);
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}
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=item catfile
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Concatenates a list of file specifications, and returns the result as a
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VMS-syntax file specification.
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=cut
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sub catfile {
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my ($self,@files) = @_;
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my $file = $self->canonpath(pop @files);
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@files = grep($_,@files);
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my $rslt;
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if (@files) {
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my $path = (@files == 1 ? $files[0] : $self->catdir(@files));
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my $spath = $path;
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$spath =~ s/\.dir\Z(?!\n)//;
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if ($spath =~ /^[^\)\]\/:>]+\)\Z(?!\n)/s && basename($file) eq $file) {
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$rslt = "$spath$file";
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}
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else {
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$rslt = $self->eliminate_macros($spath);
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$rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file));
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}
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}
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else { $rslt = (defined($file) && length($file)) ? vmsify($file) : ''; }
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return $self->canonpath($rslt);
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}
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=item curdir (override)
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Returns a string representation of the current directory: '[]'
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=cut
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sub curdir {
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return '[]';
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}
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=item devnull (override)
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Returns a string representation of the null device: '_NLA0:'
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=cut
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sub devnull {
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return "_NLA0:";
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}
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=item rootdir (override)
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Returns a string representation of the root directory: 'SYS$DISK:[000000]'
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=cut
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sub rootdir {
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return 'SYS$DISK:[000000]';
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}
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=item tmpdir (override)
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Returns a string representation of the first writable directory
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from the following list or '' if none are writable:
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sys$scratch:
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$ENV{TMPDIR}
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Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR}
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is tainted, it is not used.
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=cut
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my $tmpdir;
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sub tmpdir {
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return $tmpdir if defined $tmpdir;
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my $self = shift;
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$tmpdir = $self->_tmpdir( 'sys$scratch:', $ENV{TMPDIR} );
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}
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=item updir (override)
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Returns a string representation of the parent directory: '[-]'
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=cut
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sub updir {
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return '[-]';
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}
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=item case_tolerant (override)
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VMS file specification syntax is case-tolerant.
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=cut
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sub case_tolerant {
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return 1;
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}
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=item path (override)
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Translate logical name DCL$PATH as a searchlist, rather than trying
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to C<split> string value of C<$ENV{'PATH'}>.
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=cut
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sub path {
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my (@dirs,$dir,$i);
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while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); }
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return @dirs;
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}
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=item file_name_is_absolute (override)
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Checks for VMS directory spec as well as Unix separators.
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=cut
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sub file_name_is_absolute {
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my ($self,$file) = @_;
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# If it's a logical name, expand it.
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$file = $ENV{$file} while $file =~ /^[\w\$\-]+\Z(?!\n)/s && $ENV{$file};
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return scalar($file =~ m!^/!s ||
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$file =~ m![<\[][^.\-\]>]! ||
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$file =~ /:[^<\[]/);
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}
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=item splitpath (override)
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Splits using VMS syntax.
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=cut
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sub splitpath {
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my($self,$path) = @_;
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my($dev,$dir,$file) = ('','','');
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vmsify($path) =~ /(.+:)?([\[<].*[\]>])?(.*)/s;
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return ($1 || '',$2 || '',$3);
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}
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=item splitdir (override)
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Split dirspec using VMS syntax.
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=cut
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sub splitdir {
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my($self,$dirspec) = @_;
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$dirspec =~ tr/<>/[]/; # < and > ==> [ and ]
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$dirspec =~ s/\]\[\./\.\]\[/g; # ][. ==> .][
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$dirspec =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [
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$dirspec =~ s/\[000000\./\[/g; # [000000. ==> [
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$dirspec =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ]
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$dirspec =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar
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while ($dirspec =~ s/(^|[\[\<\.])\-(\-+)($|[\]\>\.])/$1-.$2$3/g) {}
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# That loop does the following
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# with any amount of dashes:
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# .--. ==> .-.-.
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# [--. ==> [-.-.
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# .--] ==> .-.-]
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# [--] ==> [-.-]
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$dirspec = "[$dirspec]" unless $dirspec =~ /[\[<]/; # make legal
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my(@dirs) = split('\.', vmspath($dirspec));
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$dirs[0] =~ s/^[\[<]//s; $dirs[-1] =~ s/[\]>]\Z(?!\n)//s;
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@dirs;
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}
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=item catpath (override)
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Construct a complete filespec using VMS syntax
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=cut
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sub catpath {
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my($self,$dev,$dir,$file) = @_;
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# We look for a volume in $dev, then in $dir, but not both
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my ($dir_volume, $dir_dir, $dir_file) = $self->splitpath($dir);
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$dev = $dir_volume unless length $dev;
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$dir = length $dir_file ? $self->catfile($dir_dir, $dir_file) : $dir_dir;
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if ($dev =~ m|^/+([^/]+)|) { $dev = "$1:"; }
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else { $dev .= ':' unless $dev eq '' or $dev =~ /:\Z(?!\n)/; }
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if (length($dev) or length($dir)) {
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$dir = "[$dir]" unless $dir =~ /[\[<\/]/;
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$dir = vmspath($dir);
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}
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"$dev$dir$file";
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}
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=item abs2rel (override)
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Use VMS syntax when converting filespecs.
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=cut
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sub abs2rel {
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my $self = shift;
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return vmspath(File::Spec::Unix::abs2rel( $self, @_ ))
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if grep m{/}, @_;
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my($path,$base) = @_;
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$base = $self->_cwd() unless defined $base and length $base;
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for ($path, $base) { $_ = $self->canonpath($_) }
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# Are we even starting $path on the same (node::)device as $base? Note that
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# logical paths or nodename differences may be on the "same device"
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# but the comparison that ignores device differences so as to concatenate
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# [---] up directory specs is not even a good idea in cases where there is
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# a logical path difference between $path and $base nodename and/or device.
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# Hence we fall back to returning the absolute $path spec
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# if there is a case blind device (or node) difference of any sort
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# and we do not even try to call $parse() or consult %ENV for $trnlnm()
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# (this module needs to run on non VMS platforms after all).
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my ($path_volume, $path_directories, $path_file) = $self->splitpath($path);
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my ($base_volume, $base_directories, $base_file) = $self->splitpath($base);
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return $path unless lc($path_volume) eq lc($base_volume);
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for ($path, $base) { $_ = $self->rel2abs($_) }
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# Now, remove all leading components that are the same
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my @pathchunks = $self->splitdir( $path_directories );
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unshift(@pathchunks,'000000') unless $pathchunks[0] eq '000000';
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my @basechunks = $self->splitdir( $base_directories );
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unshift(@basechunks,'000000') unless $basechunks[0] eq '000000';
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while ( @pathchunks &&
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@basechunks &&
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lc( $pathchunks[0] ) eq lc( $basechunks[0] )
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) {
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shift @pathchunks ;
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shift @basechunks ;
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}
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# @basechunks now contains the directories to climb out of,
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# @pathchunks now has the directories to descend in to.
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$path_directories = join '.', ('-' x @basechunks, @pathchunks) ;
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return $self->canonpath( $self->catpath( '', $path_directories, $path_file ) ) ;
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}
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=item rel2abs (override)
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Use VMS syntax when converting filespecs.
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=cut
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sub rel2abs {
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my $self = shift ;
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my ($path,$base ) = @_;
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return undef unless defined $path;
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if ($path =~ m/\//) {
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$path = ( -d $path || $path =~ m/\/\z/ # educated guessing about
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? vmspath($path) # whether it's a directory
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: vmsify($path) );
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}
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$base = vmspath($base) if defined $base && $base =~ m/\//;
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# Clean up and split up $path
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if ( ! $self->file_name_is_absolute( $path ) ) {
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# Figure out the effective $base and clean it up.
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if ( !defined( $base ) || $base eq '' ) {
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$base = $self->_cwd;
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}
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elsif ( ! $self->file_name_is_absolute( $base ) ) {
|
|
$base = $self->rel2abs( $base ) ;
|
|
}
|
|
else {
|
|
$base = $self->canonpath( $base ) ;
|
|
}
|
|
|
|
# Split up paths
|
|
my ( $path_directories, $path_file ) =
|
|
($self->splitpath( $path ))[1,2] ;
|
|
|
|
my ( $base_volume, $base_directories ) =
|
|
$self->splitpath( $base ) ;
|
|
|
|
$path_directories = '' if $path_directories eq '[]' ||
|
|
$path_directories eq '<>';
|
|
my $sep = '' ;
|
|
$sep = '.'
|
|
if ( $base_directories =~ m{[^.\]>]\Z(?!\n)} &&
|
|
$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 COPYRIGHT
|
|
|
|
Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the same terms as Perl itself.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
See L<File::Spec> and L<File::Spec::Unix>. This package overrides the
|
|
implementation of these methods, not the semantics.
|
|
|
|
An explanation of VMS file specs can be found at
|
|
L<"http://h71000.www7.hp.com/doc/731FINAL/4506/4506pro_014.html#apps_locating_naming_files">.
|
|
|
|
=cut
|
|
|
|
1;
|