Added ability to create a database dump at given position

seqs/mysql.sh

@@ -135,12 +135,29 @@ step_18() {
   fi
 }
 
-step_20_info() { echo "Backup and restore a mysql database"; }
+step_20_info() { echo "Backup (dump) a mysql database <DATABASE NAME> <TARGET DIR>"; }
 step_20_alias() { ALIAS="backup"; }
 step_20() {
-  echo "Dump the existing database with:"
-  echo "  mysqldump --single-transaction nextcloud_db > NextcloudBackup_DB_\`date +\"%Y%m%d\"\`.sql"
-  echo
+  shift # step number not used
+  if [ -z $1 ] ; then
+    echoerr " [E] No database name provided"
+    return 1
+  fi
+  local dbName="$1"
+  local buTarget="$2"
+  if [ -z $2 ] ; then
+    echoerr " [W] No target directory provided. Using home of current user"
+    buTarget="~/"
+  fi
+  
+  echo " [I] Dumping database $dbName to $buTarget"
+  exep "mysqldump --single-transaction $dbName > \"${buTarget}/${dbName}_backup_\`date +%Y%m%d-%H%M%S\`.sql\""
+  endReturn -o $? "Error creating $dbName backup"
+}
+
+step_22_info() { echo "Restore a mysql database"; }
+step_22_alias() { ALIAS="restore"; }
+step_22() {
   echo "Restore with:"
   echo "  mysql -e \"DROP DATABASE nextcloud_db\""
   echo "  mysql -e \"CREATE DATABASE nextcloud_db\""
@@ -164,5 +181,5 @@ readDatabaseInfos() {
   echo
 }
 
-VERSION_SEQREV=9
+VERSION_SEQREV=10
 . /usr/local/bin/sequencer.sh