add script 'download_databases_from_s3bucket'

psot/helpers/download_databases_from_s3bucket.sh

+#! /bin/bash
+
+LOGFILE=$1
+DATADIR=$2
+#s3 bucket from which the databases are downloaded
+S3BUCKET='psot-databases'
+# list of database folders, downloaded as tar-archives
+list='ghostx uniprot pfam-31'
+
+function test_datadir () {
+  
+  if ! [[ -e $DATADIR && -d $DATADIR ]]; then
+    mkdir $DATADIR
+    sync_data
+  elif [ -z "$(ls -A $DATADIR)" ]; then  
+    sync_data    
+  fi
+
+}  
+
+function sync_data () {
+  
+  echo "Could not find databases in config given path"
+  echo "Download databases... "
+
+  cd $DATADIR
+
+  for ele in $list; do
+    wget -q "https://${S3BUCKET}.s3.computational.bio.uni-giessen.de/${ele}.tar.gz"
+    tar -zxf "${ele}.tar.gz"
+    rm "${ele}.tar.gz"
+  done
+  
+  ln -s 'pfam-31/' 'pfam'
+
+  echo "[$(date)] psot (PID $$) downloaded databases to $DATADIR" >> $LOGFILE
+}
+
+if [[ -e $LOGFILE ]]; then
+  test_datadir
+else
+  echo "[$(date)] logfile created from psot (PID $$)" > $LOGFILE
+  test_datadir
+fi