[ADD] postgis_extension copier flag for geo-dependent OCA repos

copier.yml

@@ -114,6 +114,18 @@ include_wkhtmltopdf:
     Do you need to install wkhtmltopdf? Usually only needed if you're going to test PDF
     report generation.
 
+postgis_extension:
+  type: bool
+  default: no
+  when: "{{ odoo_version >= 16 }}"
+  help:
+    Does this repo install Odoo modules that require the PostGIS extension
+    (geo_* field types, wkb_geometry columns, base_geoengine, etc.)?
+    When yes, the CI postgres service uses a postgis/postgis:<pg>-<postgis>
+    image so pre_init_hook CREATE EXTENSION postgis succeeds. Recommended
+    for OCA/geospatial and any repo with geo fields. Available for
+    odoo_version >= 16.0 (postgis/postgis:9.6-* tags are EOL).
+
 enable_checklog_odoo:
   type: bool
   default: "{% if odoo_version < 18.0 -%}no{% else %}yes{% endif %}"

src/.github/workflows/test.yml.jinja

@@ -121,13 +121,31 @@ jobs:
         {%- endif %}
     services:
       postgres:
+        {%- if postgis_extension and odoo_version >= 16 %}
+        # PostGIS image variants ship the spatial extension preinstalled so
+        # modules with geo_* fields can `CREATE EXTENSION postgis` in their
+        # pre_init_hook. Image tags chosen to match the OCA/geospatial
+        # baseline on each Odoo series:
+        #   16-18  -> postgis/postgis:13-3.4 (already ships on OCA/geospatial
+        #            17.0 + 18.0 branches)
+        #   >= 19  -> postgis/postgis:14-3.5 (matches OCA/geospatial PR #446)
+        # Both PG versions are within Odoo's documented PG support window.
+        # Flag is gated to odoo_version >= 16 because postgis/postgis:9.6-*
+        # tags are EOL and not maintained.
+        {%- if odoo_version < 19 %}
+        image: postgis/postgis:13-3.4
+        {%- else %}
+        image: postgis/postgis:14-3.5
+        {%- endif %}
+        {%- else %}
         {%- if odoo_version < 16 %}
         image: postgres:9.6
         {%- elif odoo_version < 19 %}
         image: postgres:12
         {%- else %}
         image: postgres:13
         {%- endif %}
+        {%- endif %}
         env:
           POSTGRES_USER: odoo
           POSTGRES_PASSWORD: odoo