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|
#!/usr/bin/env perl
use warnings;
use strict;
use Getopt::Long "GetOptions";
use FindBin qw($RealBin);
print STDERR "Training OSM - Start\n".`date`;
my $ORDER = 5;
my $OUT_DIR = "/tmp/osm.$$";
my $___FACTOR_DELIMITER = "|";
my ($MOSES_SRC_DIR,$CORPUS_F,$CORPUS_E,$ALIGNMENT,$SRILM_DIR,$FACTOR,$LMPLZ);
# utilities
my $ZCAT = "gzip -cd";
my $BZCAT = "bzcat";
die("ERROR: wrong syntax when invoking OSM-Train.perl")
unless &GetOptions('moses-src-dir=s' => \$MOSES_SRC_DIR,
'corpus-f=s' => \$CORPUS_F,
'corpus-e=s' => \$CORPUS_E,
'alignment=s' => \$ALIGNMENT,
'order=i' => \$ORDER,
'factor=s' => \$FACTOR,
'srilm-dir=s' => \$SRILM_DIR,
'lmplz=s' => \$LMPLZ,
'out-dir=s' => \$OUT_DIR);
# check if the files are in place
die("ERROR: you need to define --corpus-e, --corpus-f, --alignment, --srilm-dir or --lmplz, and --moses-src-dir")
unless (defined($MOSES_SRC_DIR) &&
defined($CORPUS_F) &&
defined($CORPUS_E) &&
defined($ALIGNMENT)&&
(defined($SRILM_DIR) || defined($LMPLZ)));
die("ERROR: could not find input corpus file '$CORPUS_F'")
unless -e $CORPUS_F;
die("ERROR: could not find output corpus file '$CORPUS_E'")
unless -e $CORPUS_E;
die("ERROR: could not find algnment file '$ALIGNMENT'")
unless -e $ALIGNMENT;
die("ERROR: could not find OSM scripts in '$MOSES_SRC_DIR/scripts/OSM")
unless -e "$MOSES_SRC_DIR/scripts/OSM/flipAlignment.perl";
# create factors
`mkdir $OUT_DIR`;
`$MOSES_SRC_DIR/scripts/OSM/flipAlignment.perl $ALIGNMENT > $OUT_DIR/align`;
if (defined($FACTOR)) {
my @factor_values = split(/\+/, $FACTOR);
foreach my $factor_val (@factor_values) {
`mkdir $OUT_DIR/$factor_val`;
my ($factor_f,$factor_e) = split(/\-/,$factor_val);
$CORPUS_F =~ /^(.+)\.([^\.]+)/;
my ($corpus_stem_f,$ext_f) = ($1,$2);
$CORPUS_E =~ /^(.+)\.([^\.]+)/;
my ($corpus_stem_e,$ext_e) = ($1,$2);
&reduce_factors($CORPUS_F,"$corpus_stem_f.$factor_val.$ext_f",$factor_f);
&reduce_factors($CORPUS_E,"$corpus_stem_e.$factor_val.$ext_e",$factor_e);
`ln -s $corpus_stem_f.$factor_val.$ext_f $OUT_DIR/$factor_val/f`;
`ln -s $corpus_stem_e.$factor_val.$ext_e $OUT_DIR/$factor_val/e`;
create_model($factor_val);
}
}
else {
`ln -s $CORPUS_F $OUT_DIR/f`;
`ln -s $CORPUS_E $OUT_DIR/e`;
create_model("");
}
# create model
print "Training OSM - End".`date`;
sub create_model{
my ($factor_val) = @_;
print "Creating Model ".$factor_val."\n";
print "Extracting Singletons\n";
`$MOSES_SRC_DIR/scripts/OSM/extract-singletons.perl $OUT_DIR/$factor_val/e $OUT_DIR/$factor_val/f $OUT_DIR/align > $OUT_DIR/$factor_val/Singletons`;
print "Converting Bilingual Sentence Pair into Operation Corpus\n";
`$MOSES_SRC_DIR/bin/generateSequences $OUT_DIR/$factor_val/e $OUT_DIR/$factor_val/f $OUT_DIR/align $OUT_DIR/$factor_val/Singletons > $OUT_DIR/$factor_val/opCorpus`;
print "Learning Operation Sequence Translation Model\n";
if (defined($LMPLZ)) {
`$LMPLZ --order $ORDER --text $OUT_DIR/$factor_val/opCorpus --arpa $OUT_DIR/$factor_val/operationLM --prune 0 0 1`;
}
else {
`$SRILM_DIR/ngram-count -kndiscount -order $ORDER -unk -text $OUT_DIR/$factor_val/opCorpus -lm $OUT_DIR/$factor_val/operationLM`;
}
print "Binarizing\n";
`$MOSES_SRC_DIR/bin/build_binary $OUT_DIR/$factor_val/operationLM $OUT_DIR/$factor_val/operationLM.bin`;
}
# from train-model.perl
sub reduce_factors {
my ($full,$reduced,$factors) = @_;
my @INCLUDE = sort {$a <=> $b} split(/,/,$factors);
print "Reducing factors to produce $reduced @ ".`date`;
while(-e $reduced.".lock") {
sleep(10);
}
if (-e $reduced) {
print STDERR " $reduced in place, reusing\n";
return;
}
if (-e $reduced.".gz") {
print STDERR " $reduced.gz in place, reusing\n";
return;
}
# peek at input, to check if we are asked to produce exactly the
# available factors
my $inh = open_or_zcat($full);
my $firstline = <$inh>;
die "Corpus file $full is empty" unless $firstline;
close $inh;
# pick first word
$firstline =~ s/^\s*//;
$firstline =~ s/\s.*//;
# count factors
my $maxfactorindex = $firstline =~ tr/|/|/;
if (join(",", @INCLUDE) eq join(",", 0..$maxfactorindex)) {
# create just symlink; preserving compression
my $realfull = $full;
if (!-e $realfull && -e $realfull.".gz") {
$realfull .= ".gz";
$reduced =~ s/(\.gz)?$/.gz/;
}
safesystem("ln -s '$realfull' '$reduced'")
or die "Failed to create symlink $realfull -> $reduced";
return;
}
# The default is to select the needed factors
`touch $reduced.lock`;
*IN = open_or_zcat($full);
open(OUT,">".$reduced) or die "ERROR: Can't write $reduced";
my $nr = 0;
while(<IN>) {
$nr++;
print STDERR "." if $nr % 10000 == 0;
print STDERR "($nr)" if $nr % 100000 == 0;
chomp; s/ +/ /g; s/^ //; s/ $//;
my $first = 1;
foreach (split) {
my @FACTOR = split /\Q$___FACTOR_DELIMITER/;
# \Q causes to disable metacharacters in regex
print OUT " " unless $first;
$first = 0;
my $first_factor = 1;
foreach my $outfactor (@INCLUDE) {
print OUT "|" unless $first_factor;
$first_factor = 0;
my $out = $FACTOR[$outfactor];
die "ERROR: Couldn't find factor $outfactor in token \"$_\" in $full LINE $nr" if !defined $out;
print OUT $out;
}
}
print OUT "\n";
}
print STDERR "\n";
close(OUT);
close(IN);
`rm -f $reduced.lock`;
}
sub open_or_zcat {
my $fn = shift;
my $read = $fn;
$fn = $fn.".gz" if ! -e $fn && -e $fn.".gz";
$fn = $fn.".bz2" if ! -e $fn && -e $fn.".bz2";
if ($fn =~ /\.bz2$/) {
$read = "$BZCAT $fn|";
} elsif ($fn =~ /\.gz$/) {
$read = "$ZCAT $fn|";
}
my $hdl;
open($hdl,$read) or die "Can't read $fn ($read)";
return $hdl;
}
sub safesystem {
print STDERR "Executing: @_\n";
system(@_);
if ($? == -1) {
print STDERR "ERROR: Failed to execute: @_\n $!\n";
exit(1);
}
elsif ($? & 127) {
printf STDERR "ERROR: Execution of: @_\n died with signal %d, %s coredump\n",
($? & 127), ($? & 128) ? 'with' : 'without';
exit(1);
}
else {
my $exitcode = $? >> 8;
print STDERR "Exit code: $exitcode\n" if $exitcode;
return ! $exitcode;
}
}
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