[egs] Quote $train_cmd in aishell scripts (#3856)

Author: qindazhu

egs/aishell/s10/local/run_chain.sh

@@ -50,7 +50,7 @@ if [[ $stage -le 0 ]]; then
     dst_dir=data/fbank_pitch/$datadir
     utils/copy_data_dir.sh data/$datadir $dst_dir
     echo "making fbank-pitch features for LF-MMI training"
-    steps/make_fbank_pitch.sh --cmd $train_cmd --nj $nj $dst_dir || exit 1
+    steps/make_fbank_pitch.sh --cmd "$train_cmd" --nj $nj $dst_dir || exit 1
     steps/compute_cmvn_stats.sh $dst_dir || exit 1
     utils/fix_data_dir.sh $dst_dir
   done
@@ -74,7 +74,7 @@ if [[ $stage -le 2 ]]; then
   # step compared with other recipes.
   steps/nnet3/chain/build_tree.sh --frame-subsampling-factor 3 \
       --context-opts "--context-width=2 --central-position=1" \
-      --cmd $train_cmd 5000 data/train $lang $ali_dir $treedir
+      --cmd "$train_cmd" 5000 data/train $lang $ali_dir $treedir
 fi
 
 if  [[ $stage -le 3 ]]; then
@@ -98,7 +98,7 @@ if [[ $stage -le 5 ]]; then
   echo "generating egs"
   steps/nnet3/chain/get_egs.sh \
     --alignment-subsampling-factor 3 \
-    --cmd $train_cmd \
+    --cmd "$train_cmd" \
     --cmvn-opts "--norm-means=false --norm-vars=false" \
     --frame-subsampling-factor 3 \
     --frames-overlap-per-eg 0 \
@@ -221,7 +221,7 @@ if [[ $stage -le 11 ]]; then
   echo "scoring"
 
   for x in test dev; do
-    ./local/score.sh --cmd $decode_cmd \
+    ./local/score.sh --cmd "$decode_cmd" \
       data/fbank_pitch/$x \
       exp/chain/graph \
       exp/chain/decode_res/$x || exit 1

egs/aishell/s10/run.sh

@@ -57,55 +57,55 @@ fi
 mfccdir=mfcc
 if [[ $stage -le 5 ]]; then
   for x in train dev test; do
-    steps/make_mfcc_pitch.sh --cmd $train_cmd --nj $nj \
+    steps/make_mfcc_pitch.sh --cmd "$train_cmd" --nj $nj \
       data/$x exp/make_mfcc/$x $mfccdir || exit 1
     steps/compute_cmvn_stats.sh data/$x exp/make_mfcc/$x $mfccdir || exit 1
     utils/fix_data_dir.sh data/$x || exit 1
   done
 fi
 
 if [[ $stage -le 6 ]]; then
-  steps/train_mono.sh --cmd $train_cmd --nj $nj \
+  steps/train_mono.sh --cmd "$train_cmd" --nj $nj \
     data/train data/lang exp/mono || exit 1
 fi
 
 if [[ $stage -le 7 ]]; then
-  steps/align_si.sh --cmd $train_cmd --nj $nj \
+  steps/align_si.sh --cmd "$train_cmd" --nj $nj \
     data/train data/lang exp/mono exp/mono_ali || exit 1
 fi
 
 if [[ $stage -le 8 ]]; then
-  steps/train_deltas.sh --cmd $train_cmd \
+  steps/train_deltas.sh --cmd "$train_cmd" \
    2500 20000 data/train data/lang exp/mono_ali exp/tri1 || exit 1
 fi
 
 if [[ $stage -le 9 ]]; then
-  steps/align_si.sh --cmd $train_cmd --nj $nj \
+  steps/align_si.sh --cmd "$train_cmd" --nj $nj \
     data/train data/lang exp/tri1 exp/tri1_ali || exit 1
 fi
 
 if [[ $stage -le 10 ]]; then
-  steps/train_deltas.sh --cmd $train_cmd \
+  steps/train_deltas.sh --cmd "$train_cmd" \
    2500 20000 data/train data/lang exp/tri1_ali exp/tri2 || exit 1
 fi
 
 if [[ $stage -le 11 ]]; then
-  steps/align_si.sh --cmd $train_cmd --nj $nj \
+  steps/align_si.sh --cmd "$train_cmd" --nj $nj \
     data/train data/lang exp/tri2 exp/tri2_ali || exit 1
 fi
 
 if [[ $stage -le 12 ]]; then
-  steps/train_lda_mllt.sh --cmd $train_cmd \
+  steps/train_lda_mllt.sh --cmd "$train_cmd" \
    2500 20000 data/train data/lang exp/tri2_ali exp/tri3a || exit 1
 fi
 
 if [[ $stage -le 13 ]]; then
-  steps/align_fmllr.sh --cmd $train_cmd --nj $nj \
+  steps/align_fmllr.sh --cmd "$train_cmd" --nj $nj \
     data/train data/lang exp/tri3a exp/tri3a_ali || exit 1
 fi
 
 if [[ $stage -le 14 ]]; then
-  steps/align_fmllr_lats.sh --nj $nj --cmd $train_cmd data/train \
+  steps/align_fmllr_lats.sh --nj $nj --cmd "$train_cmd" data/train \
     data/lang exp/tri3a exp/tri3a_lats
   rm exp/tri3a_lats/fsts.*.gz # save space
 fi