Adiciona rotina de checagem de migração

Signed-off-by: Eliseu Egewarth <eliseuegewarth@gmail.com>

.travis.yml

@@ -16,6 +16,7 @@ before_script:
   - psql -c "CREATE DATABASE sapl OWNER sapl;" -U postgres
 
 script:
+  - ./check_migrations.sh
   - ./manage.py migrate
   - ./manage.py bower install
   - py.test --create-db

check_migrations.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+python manage.py makemigrations --dry-run --exit > /dev/null
+
+MIGRATIONS=$?
+
+[ $MIGRATIONS -eq 0 ] && echo "You have unapplied code change. run 'python manage.py makemigrations'" && exit 1
+[ $MIGRATIONS -ne 0 ] && echo "" && exit 0