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#!/bin/bash
# Copyright (c) Facebook, Inc. and its affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
#
# LASER Language-Agnostic SEntence Representations
# is a toolkit to calculate multilingual sentence embeddings
# and to use them for document classification, bitext filtering
# and mining
#
#-------------------------------------------------------
#
# This bash script installs the flores200 dataset, downloads laser2, and then
# performs xsim++ evaluation with ratio margin
if [ -z ${LASER} ] ; then
echo "Please set the environment variable 'LASER'"
exit
fi
ddir="${LASER}/data"
cd $ddir # move to data directory
if [ ! -d $ddir/flores200 ] ; then
echo " - Downloading flores200..."
wget --trust-server-names -q https://tinyurl.com/flores200dataset
tar -xf flores200_dataset.tar.gz
/bin/mv flores200_dataset flores200
/bin/rm flores200_dataset.tar.gz
else
echo " - flores200 already downloaded"
fi
mdir="${LASER}/models"
if [ ! -d ${mdir} ] ; then
echo " - creating model directory: ${mdir}"
mkdir -p ${mdir}
fi
function download {
file=$1
save_dir=$2
if [ -f ${save_dir}/${file} ] ; then
echo " - ${save_dir}/$file already downloaded";
else
cd $save_dir
echo " - Downloading $s3/${file}";
wget -q $s3/${file};
cd -
fi
}
# available encoders
s3="https://dl.fbaipublicfiles.com/nllb/laser"
if [ ! -f ${mdir}/laser2.pt ] ; then
cd $mdir
echo " - Downloading $s3/laser2.pt"
wget --trust-server-names -q https://tinyurl.com/nllblaser2
cd -
else
echo " - ${mdir}/laser2.pt already downloaded"
fi
download "laser2.spm" $mdir
download "laser2.cvocab" $mdir
corpus_part="devtest"
corpus="flores200"
# download flores200 augmented data (eng_Latn)
s3="https://dl.fbaipublicfiles.com/nllb/laser/xsimplusplus"
augmented_dir=$ddir/$corpus/${corpus_part}_augmented
if [ ! -d $augmented_dir ]; then mkdir $augmented_dir; fi
download "eng_Latn_augmented.$corpus_part" $augmented_dir
download "eng_Latn_errtype.$corpus_part.json" $augmented_dir
# note: example evaluation script expects format: basedir/corpus/corpus_part/lang.corpus_part
echo " - calculating xsim++"
python3 $LASER/source/eval.py \
--base-dir $ddir \
--corpus $corpus \
--corpus-part $corpus_part \
--margin ratio \
--src-encoder $LASER/models/laser2.pt \
--src-spm-model $LASER/models/laser2.spm \
--src-langs afr_Latn,fin_Latn,fra_Latn,hin_Deva,tha_Thai \
--tgt-langs eng_Latn \
--tgt-aug-langs eng_Latn \
--verbose
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