fix(PostGIS): define GDAL/PROJ datasets

Signed-off-by: Niccolò Fei <niccolo.fei@enterprisedb.com>

Author: NiccoloFei

postgis/Dockerfile

@@ -61,7 +61,7 @@ COPY --from=builder \
 	/usr/lib/postgresql/${PG_MAJOR}/lib/postgis* \
 	/lib/
 
-COPY --from=builder /usr/lib/postgresql/18/lib/bitcode/ /lib/bitcode/
+COPY --from=builder /usr/lib/postgresql/${PG_MAJOR}/lib/bitcode/ /lib/bitcode/
 
 # Share
 COPY --from=builder \
@@ -74,4 +74,8 @@ COPY --from=builder /usr/share/postgresql/${PG_MAJOR}/contrib/postgis* /share/co
 # System libs
 COPY --from=builder /system /system/
 
+# Geospatial datasets
+COPY --from=builder /usr/share/gdal /system/share/gdal
+COPY --from=builder /usr/share/proj /system/share/proj
+
 USER 65532:65532

postgis/README.md

@@ -32,6 +32,11 @@ spec:
         reference: ghcr.io/cloudnative-pg/postgis-extension:3.6.2-18-trixie
       ld_library_path:
       - system
+      env:
+      - name: GDAL_DATA
+        value: ${image_root}/system/share/gdal
+      - name: PROJ_DATA
+        value: ${image_root}/system/share/proj
 ```
 
 ### 2. Enable the extension in a database

postgis/metadata.hcl

@@ -9,7 +9,10 @@ metadata = {
   dynamic_library_path     = []
   ld_library_path          = ["system"]
   bin_path                 = []
-  env                      = {}
+  env                      = {
+    "GDAL_DATA" = "$${image_root}/system/share/gdal",
+    "PROJ_DATA" = "$${image_root}/system/share/proj",
+  }
   auto_update_os_libs      = true
   required_extensions      = []
   create_extension         = true