added restore staging db script

restore-staging-db-with-production.sh

@@ -0,0 +1,48 @@
+function indent() {
+    sed 's/^/    /';
+}
+
+function set_maintenance() {
+    # app_name mode
+    heroku maintenance:$2 --app $1
+}
+
+function scale_down() {
+    # app_name
+    heroku ps --app $1 | grep === | while read line ; do
+        name=$( echo "$line" |cut -d ' ' -f2 )
+        heroku ps:scale $name=0 --app $1
+    done
+}
+
+function copy_db {
+    # from_app, from_db, to_app, to_db
+    # heroku pg:copy $1::$2 $4 --app $3 --confirm $3  # this is too slow
+    heroku pg:backups capture $2 --app $1 # capture backup # not required if we want to use the latest backup
+    backup_id=`heroku pg:backups --app $1 | grep $2 | head -n1 | cut -d " " -f 1`
+    echo "    RESTORING BACKUP ID $backup_id ($1/$2) to $3/$4"
+    heroku pg:backups restore "`heroku pg:backups public-url $backup_id --app $1`" $4 --app $3 --confirm $3  # restore backup
+}
+
+function scale_web_dyno_to_one() {
+    # app_name
+    heroku ps:scale web=1 --app $1
+}
+
+echo -e "\n*** ENABLING MAINTENANCE MODE  ***"
+set_maintenance qrtr-services-staging on
+
+echo -e "\n*** TURN OFF DYNOS  ***"
+scale_down qrtr-services-staging
+
+echo -e "\n*** EMPTYING DB ***"
+heroku pg:reset DATABASE --app qrtr-services-staging --confirm qrtr-services-staging
+
+echo -e "\n*** RESTORING DB ***"
+copy_db qrtr-services DATABASE qrtr-services-staging DATABASE | indent
+
+echo -e "\n*** TURN ON WEB DYNOS  ***"
+scale_web_dyno_to_one qrtr-services-staging
+
+echo -e "\n*** DISABLING MAINTENANCE MODE  ***"
+set_maintenance qrtr-services-staging off