Commit | Line | Data |
---|---|---|
9ad884cb JH |
1 | #!/usr/bin/perl -w |
2 | use strict; | |
3879ea51 | 3 | use vars qw($Needs_Write $Verbose @Changed $TAP); |
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 $Verbose = -1) } | |
3879ea51 | 13 | grep { not($_ eq '--tap' and $TAP = 1) } |
523b3031 NC |
14 | grep { not($_ eq '-v' and $Verbose = 1) } @ARGV; |
15 | ||
16 | END { | |
17 | print STDOUT "Changed: @Changed\n" if @Changed; | |
18 | } | |
95aa0565 | 19 | |
9ad884cb JH |
20 | sub safer_unlink { |
21 | my @names = @_; | |
22 | my $cnt = 0; | |
23 | ||
24 | my $name; | |
25 | foreach $name (@names) { | |
26 | next unless -e $name; | |
27 | chmod 0777, $name if $Needs_Write; | |
28 | ( CORE::unlink($name) and ++$cnt | |
29 | or warn "Couldn't unlink $name: $!\n" ); | |
30 | } | |
31 | return $cnt; | |
32 | } | |
33 | ||
34 | sub safer_rename_silent { | |
35 | my ($from, $to) = @_; | |
36 | ||
37 | # Some dosish systems can't rename over an existing file: | |
38 | safer_unlink $to; | |
39 | chmod 0600, $from if $Needs_Write; | |
40 | rename $from, $to; | |
41 | } | |
42 | ||
424a4936 | 43 | sub rename_if_different { |
9ad884cb | 44 | my ($from, $to) = @_; |
b6b9a099 | 45 | |
3879ea51 NC |
46 | if ($TAP) { |
47 | my $not = compare($from, $to) ? 'not ' : ''; | |
48 | print STDOUT $not . "ok - $0 $to\n"; | |
49 | safer_unlink($from); | |
50 | return; | |
51 | } | |
424a4936 | 52 | if (compare($from, $to) == 0) { |
523b3031 | 53 | warn "no changes between '$from' & '$to'\n" if $Verbose > 0; |
b6b9a099 JC |
54 | safer_unlink($from); |
55 | return; | |
56 | } | |
523b3031 NC |
57 | warn "changed '$from' to '$to'\n" if $Verbose > 0; |
58 | push @Changed, $to unless $Verbose < 0; | |
9ad884cb JH |
59 | safer_rename_silent($from, $to) or die "renaming $from to $to: $!"; |
60 | } | |
424a4936 NC |
61 | |
62 | # Saf*er*, but not totally safe. And assumes always open for output. | |
63 | sub safer_open { | |
64 | my $name = shift; | |
65 | my $fh = gensym; | |
66 | open $fh, ">$name" or die "Can't create $name: $!"; | |
08858ed2 | 67 | *{$fh}->{SCALAR} = $name; |
424a4936 NC |
68 | binmode $fh; |
69 | $fh; | |
70 | } | |
71 | ||
08858ed2 NC |
72 | sub safer_close { |
73 | my $fh = shift; | |
74 | close $fh or die 'Error closing ' . *{$fh}->{SCALAR} . ": $!"; | |
75 | } | |
76 | ||
9ad884cb | 77 | 1; |