Generate empty w2v file if vocab is empty

UD_any/data/pretrainEmbeddings.sh

@@ -13,17 +13,22 @@ if [ $2 == "LETTERS" ]; then
 	MINCOUNT=10
 fi
 
-
 cp -r $GLOVE .
 GLOVE="GloVe/"
 CURDIR="$(pwd)"
 cd $GLOVE && make clean && make && cd $CURDIR \
 && $HORIZONTAL $1 $2 > in.text \
-&& $GLOVE"build/vocab_count" -min-count $MINCOUNT < in.text > vocab.txt \
+&& $GLOVE"build/vocab_count" -min-count $MINCOUNT < in.text > vocab.txt
+
+[ -s vocab.txt ] \
 && $GLOVE"build/cooccur" -symmetric 0 -window-size 10 -vocab-file vocab.txt -memory 8.0 -overflow-file tempoverflow < in.text > cooccurrences.bin \
 && $GLOVE"build/shuffle" -memory 8.0 -seed 100 < cooccurrences.bin > cooccurrence.shuf.bin \
 && $GLOVE"build/glove" -iter 50 -save_gradsq 0 -write-header 1 -input-file cooccurrence.shuf.bin -vocab-file vocab.txt -save-file out -gradsq-file gradsq -vector-size $3 -seed 100 -threads 1 -alpha 0.75 -x-max 100.0 -eta 0.05 -binary 0 -model 1 \
-&& mv out.txt $4
+&& cp out.txt $4
+
+if [ ! -s $4 ] ; then
+  echo "0 $3" > $4
+fi
 
 rm in.text 2> /dev/null
 rm vocab.txt 2> /dev/null