rework the OSM data loading process

qgis4/ansible/roles/msperfs/tasks/main.yml

@@ -52,41 +52,40 @@
     group: "{{ user }}"
   when: switzerland_data.stat.exists == false
 
-# Note: unfortunately, this won't converge,
-# because we do need to launch the database container
-# to check if OSM datas have been loaded
-# TODO: instead, use a file to "flag" if data have already been imported or not
+- name: Check if OSM datas have been already loaded
+  stat:
+    path: "/home/{{ user }}/.ms_perfs_data_loaded"
+  register: data_loaded
 
 - name: Launch the docker composition from docker-osm
-  docker_compose:
+  docker_service:
     project_src: "/home/{{ user }}/ms_perfs/docker-osm"
     build: yes
     pull: yes
+  when: not data_loaded.stat.exists
 
 - name: wait for the docker db container to be up
   wait_for:
     port: 15432
     delay: 10
-
-- name: Verify if the OSM data have already been loaded
-  postgresql_query:
-    db: gis
-    login_host: localhost
-    login_port: 15432
-    login_user: docker
-    login_password: docker
-    query: "SELECT pg_database_size('gis');"
-  register: query_in_osmdb
+  when: not data_loaded.stat.exists
 
 - name: Wait for 10 minutes to get data sourced to postgresql
   pause:
     minutes: 10
-  when: query_in_osmdb.query_result[0].pg_database_size < 13000000 # 13MB
+  when: not data_loaded.stat.exists
 
 - name: Stopping the docker composition from docker-osm
-  docker_compose:
+  docker_service:
     project_src: "/home/{{ user }}/ms_perfs/docker-osm"
     stopped: true
+  when: not data_loaded.stat.exists
+
+- name: Create the flag so that OSM data won't be overwritten again
+  copy:
+    content: ""
+    dest: "/home/{{ user }}/.ms_perfs_data_loaded"
+  when: not data_loaded.stat.exists
 
 - name: Configure Nginx to serve the ms_perfs results
   template: