Fix pre-commit hooks and move directories

roles/ and inventory/ are now in playbooks/
also fixed issues reported by ansible-lint

playbooks/roles/backup/files/hooks/postgresql

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+cd "$1"
+
+postgres_tables=$(sudo -u postgres psql -Atc "SELECT datname FROM pg_database WHERE datistemplate = false;")
+
+for i in $postgres_tables
+do
+	printf "dumping %s ..." "$i"
+	sudo -u postgres pg_dump "$i" | gzip >"pg_dump_$i.sql.gz"
+	echo " done"
+done
+
+echo "dumping all"
+sudo -u postgres pg_dumpall | gzip >"pg_dumpall.sql.gz"