#!/usr/bin/perl -w
use strict;
-use vars qw($Is_W32 $Is_OS2 $Is_Cygwin $Is_NetWare $Needs_Write);
-use Config; # Remember, this is running using an existing perl
+use vars qw($Needs_Write $Verbose @Changed);
+use File::Compare;
+use Symbol;
# Common functions needed by the regen scripts
-$Is_W32 = $^O eq 'MSWin32';
-$Is_OS2 = $^O eq 'os2';
-$Is_Cygwin = $^O eq 'cygwin';
-$Is_NetWare = $Config{osname} eq 'NetWare';
-if ($Is_NetWare) {
- $Is_W32 = 0;
-}
-
-$Needs_Write = $Is_OS2 || $Is_W32 || $Is_Cygwin || $Is_NetWare;
+$Needs_Write = $^O eq 'cygwin' || $^O eq 'os2' || $^O eq 'MSWin32';
-eval "use Digest::MD5 'md5'; 1;"
- or warn "Digest::MD5 unavailable, doing unconditional regen\n";
+$Verbose = 0;
+@ARGV = grep { not($_ eq '-q' and $Verbose = -1) }
+ grep { not($_ eq '-v' and $Verbose = 1) } @ARGV;
-sub cksum {
- my $pl = shift;
- my ($buf, $cksum);
- local *FH;
- if (open(FH, $pl)) {
- local $/;
- $buf = <FH>;
- $cksum = defined &md5 ? md5($buf) : 0;
- close FH;
- } else {
- warn "$0: $pl: $!\n";
- }
- return $cksum;
+END {
+ print STDOUT "Changed: @Changed\n" if @Changed;
}
sub safer_unlink {
rename $from, $to;
}
-sub safer_rename_always {
- my ($from, $to) = @_;
- safer_rename_silent($from, $to) or die "renaming $from to $to: $!";
-}
-
-sub safer_rename {
+sub rename_if_different {
my ($from, $to) = @_;
- my $fc = cksum($from);
- my $tc = cksum($to);
-
- if ($fc and $fc eq $tc) {
- warn "no changes between '$from' & '$to'\n";
+ if (compare($from, $to) == 0) {
+ warn "no changes between '$from' & '$to'\n" if $Verbose > 0;
safer_unlink($from);
return;
}
- warn "changed '$from' to '$to'\n";
+ warn "changed '$from' to '$to'\n" if $Verbose > 0;
+ push @Changed, $to unless $Verbose < 0;
safer_rename_silent($from, $to) or die "renaming $from to $to: $!";
}
+
+# Saf*er*, but not totally safe. And assumes always open for output.
+sub safer_open {
+ my $name = shift;
+ my $fh = gensym;
+ open $fh, ">$name" or die "Can't create $name: $!";
+ *{$fh}->{SCALAR} = $name;
+ binmode $fh;
+ $fh;
+}
+
+sub safer_close {
+ my $fh = shift;
+ close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!";
+}
+
1;