xref: /trunk/main/solenv/bin/diffmv.pl (revision cdf0e10c) 
1:
2    eval 'exec perl -S $0 ${1+"$@"}'
3        if 0;
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30
31
32my ( $srcfile, $destfile ) = @ARGV;
33my ( @srclines, @destlines );
34my $dest_existing = 0;
35@destlines = ();
36
37usage() if ( ! defined $srcfile || ! defined $destfile);
38
39open(SRCFILE, "$srcfile") or die "ERROR: Can't open $srcfile\n";
40@srclines = <SRCFILE>;
41close SRCFILE;
42
43if ( -f $destfile ) {
44    open(DESTFILE, "$destfile") or die "ERROR: Can't open $destfile\n";
45    @destlines = <DESTFILE>;
46    close DESTFILE;
47    $dest_existing = 1;
48}
49
50if ( ! check_if_lists_equal(\@srclines,  \@destlines) ) {
51    print STDERR "Updating \"$destfile\".\n";
52    unlink "$destfile" or die "ERROR: Can't remove old $destfile\n" if ( $dest_existing );
53    rename "$srcfile", "$destfile" or die "ERROR: Can't rename $srcfile to $destfile\n";
54} else {
55    print STDERR "\"$destfile\" unchanged.\n";
56}
57
58sub check_if_lists_equal
59{
60    my  ( $srclist_ref, $destlist_ref ) = @_;
61    my @srclist  = @{ $srclist_ref };
62    my @destlist  = @{ $destlist_ref };
63    return  0 if ( $#srclist != $#destlist );
64    for ( my $i = 0; $i  < $#srclist; $i++ ) {
65        return 0 if  ( $srclist[$i] ne $destlist[$i]);
66    }
67    return  1;
68}
69
70sub usage
71{
72    print STDERR "Usage: diffmv sourcefile destfile\n";
73    print STDERR "Do move diffing file only\n";
74    exit 1;
75}
76
77