mirror of
https://github.com/mozilla/gecko-dev.git
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165 lines
3.0 KiB
Perl
165 lines
3.0 KiB
Perl
package FileNameFind;
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$VERSION = 0.01;
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require 5.000;
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use strict;
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use vars qw($VERSION);
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#use vars qw(@ISA @EXPORT $VERSION);
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#require Exporter;
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#@ISA = qw(Exporter);
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#@EXPORT = qw();
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=head1 NAME
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FileNameFind - Build an index of file names in a source tree.
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=head1 SYNOPSIS
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use FileNameFind;
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$find = new FileNameFind;
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$root = '/u/slamm/tt/cvsroot/mozilla/';
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$tree = 'SeaMonkey';
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$find->update($root, $tree);
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$find = new FileNameFind;
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$find->open($tree);
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@dirs = $find->lookup('foo.c');
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$find->close;
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=head1 DESCRIPTION
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The index can be used to find the full path of a file based on its filename.
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If a filename appears in a tree more than once, all the directories will
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be listed for that filename.
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=head1 FILES
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<tree>/file_dirs.db
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=head1 AUTHOR
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Stephen Lamm, slamm@netscape.com
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=cut
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$FileNameFind::Filename = 'file_dirs.db';
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sub new {
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my $class = shift;
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my $self = {};
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bless($self, $class);
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return $self;
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}
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sub DESTROY {
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my $self = shift;
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$self->close;
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}
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sub update {
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my $self = shift;
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my ($root, $tree) = @_;
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use File::Find;
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$root =~ s/\/$//;
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$self->open($tree);
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&find(\&add_to_index,$root);
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sub add_to_index {
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$File::Find::prune = 1 if /^CVS$/;
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if (-T $_ and /\.(cpp|h|c|s),v$/) {
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my $filename = $_;
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$filename =~ s/,v$//;
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my $dir = "$File::Find::dir";
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$dir =~ s/^$root\/?//;
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$dir = '.' if $dir eq '';
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if (defined(my $file_entry = $self->{dbhash}->{$filename})) {
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my @list = split /:/, $file_entry;
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foreach my $dd (@list) {
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if ($dd eq $dir) {
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return;
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} }
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warn "Adding $filename = $dir\n";
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push @list, $dir;
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$self->{dbhash}->{$filename} = join(':',@list);
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} else {
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warn "New $filename = $dir\n";
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$self->{dbhash}->{$filename} = $dir;
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} } } }
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sub open {
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my $self = shift;
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my $tree = shift;
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my $filename = "$tree/$FileNameFind::Filename";
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my $hash_ref = {};
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use DB_File;
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$self->close;
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tie %{$hash_ref}, 'DB_File', $filename
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or die "Cannot open $filename: $!\n";
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$self->{dbhash} = $hash_ref;
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}
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sub close {
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my $self = shift;
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if (defined($self->{dbhash})) {
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untie %{$self->{dbhash}};
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delete $self->{dbhash};
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}
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}
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sub lookup {
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my $self = shift;
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my $filename = shift;
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my $candidate;
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my %args = ( @_ );
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my @dirs = split /:/, $self->{dbhash}->{$filename};
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if (defined($candidate = $args{candidate})) {
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for my $dir (@dirs) {
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return ($dir) if $dir == $candidate;
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}
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}
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return @dirs;
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}
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sub dump {
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my $self = shift;
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my ($file, $dirlist);
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while (($file, $dirlist) = each %{ $self->{dbhash} } ) {
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for my $dir (split /:/, $dirlist) {
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print "$dir/$file\n";
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} } }
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1;
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__END__
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# Simple Module Test
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use FileNameFind;
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$find = new FileNameFind;
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$tree = 'SeaMonkey';
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if (1) {
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$cvsroot = '/u/slamm/tt/cvsroot/mozilla';
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$find->update($cvsroot, $tree);
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} else {
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$find->open($tree);
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@dirs = $find->lookup('foo.c');
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print "There are ".($#dirs+1)." occurance(s) of foo.c\n";
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$find->dump;
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}
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