Commit | Line | Data |
---|---|---|
9ad884cb JH |
1 | #!/usr/bin/perl -w |
2 | use strict; | |
bb21036d | 3 | use vars qw($Needs_Write $Verbose @Changed); |
424a4936 NC |
4 | use File::Compare; |
5 | use Symbol; | |
9ad884cb JH |
6 | |
7 | # Common functions needed by the regen scripts | |
8 | ||
bb21036d | 9 | $Needs_Write = $^O eq 'cygwin' || $^O eq 'os2' || $^O eq 'MSWin32'; |
9ad884cb | 10 | |
523b3031 NC |
11 | $Verbose = 0; |
12 | @ARGV = grep { not($_ eq '-q' and $Verbose = -1) } | |
13 | grep { not($_ eq '-v' and $Verbose = 1) } @ARGV; | |
14 | ||
15 | END { | |
16 | print STDOUT "Changed: @Changed\n" if @Changed; | |
17 | } | |
95aa0565 | 18 | |
9ad884cb JH |
19 | sub safer_unlink { |
20 | my @names = @_; | |
21 | my $cnt = 0; | |
22 | ||
23 | my $name; | |
24 | foreach $name (@names) { | |
25 | next unless -e $name; | |
26 | chmod 0777, $name if $Needs_Write; | |
27 | ( CORE::unlink($name) and ++$cnt | |
28 | or warn "Couldn't unlink $name: $!\n" ); | |
29 | } | |
30 | return $cnt; | |
31 | } | |
32 | ||
33 | sub safer_rename_silent { | |
34 | my ($from, $to) = @_; | |
35 | ||
36 | # Some dosish systems can't rename over an existing file: | |
37 | safer_unlink $to; | |
38 | chmod 0600, $from if $Needs_Write; | |
39 | rename $from, $to; | |
40 | } | |
41 | ||
424a4936 | 42 | sub rename_if_different { |
9ad884cb | 43 | my ($from, $to) = @_; |
b6b9a099 | 44 | |
424a4936 | 45 | if (compare($from, $to) == 0) { |
523b3031 | 46 | warn "no changes between '$from' & '$to'\n" if $Verbose > 0; |
b6b9a099 JC |
47 | safer_unlink($from); |
48 | return; | |
49 | } | |
523b3031 NC |
50 | warn "changed '$from' to '$to'\n" if $Verbose > 0; |
51 | push @Changed, $to unless $Verbose < 0; | |
9ad884cb JH |
52 | safer_rename_silent($from, $to) or die "renaming $from to $to: $!"; |
53 | } | |
424a4936 NC |
54 | |
55 | # Saf*er*, but not totally safe. And assumes always open for output. | |
56 | sub safer_open { | |
57 | my $name = shift; | |
58 | my $fh = gensym; | |
59 | open $fh, ">$name" or die "Can't create $name: $!"; | |
08858ed2 | 60 | *{$fh}->{SCALAR} = $name; |
424a4936 NC |
61 | binmode $fh; |
62 | $fh; | |
63 | } | |
64 | ||
08858ed2 NC |
65 | sub safer_close { |
66 | my $fh = shift; | |
67 | close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!"; | |
68 | } | |
69 | ||
9ad884cb | 70 | 1; |