Support PostgreSQL Custom Format (#63806)

* Support PGC Restores

* Fix whitespace

* support pgc both dump and restore

changelogs/fragments/63629-postgresql_db_pgc_support.yaml

@@ -0,0 +1,2 @@
+minor_changes:
+- postgresql_db - add support for .pgc file format for dump and restores.

lib/ansible/modules/database/postgresql/postgresql_db.py

@@ -71,7 +71,7 @@ options:
       pg_dump returns rc 1 in this case.
     - C(restore) also requires a target definition from which the database will be restored. (Added in Ansible 2.4)
     - The format of the backup will be detected based on the target name.
-    - Supported compression formats for dump and restore include C(.bz2), C(.gz) and C(.xz)
+    - Supported compression formats for dump and restore include C(.pgc), C(.bz2), C(.gz) and C(.xz)
     - Supported formats for dump and restore include C(.sql) and C(.tar)
     type: str
     choices: [ absent, dump, present, restore ]
@@ -346,6 +346,8 @@ def db_dump(module, target, target_opts="",
 
     if os.path.splitext(target)[-1] == '.tar':
         flags.append(' --format=t')
+    elif os.path.splitext(target)[-1] == '.pgc':
+        flags.append(' --format=c')
     if os.path.splitext(target)[-1] == '.gz':
         if module.get_bin_path('pigz'):
             comp_prog_path = module.get_bin_path('pigz', True)
@@ -392,6 +394,10 @@ def db_restore(module, target, target_opts="",
         flags.append(' --format=Tar')
         cmd = module.get_bin_path('pg_restore', True)
 
+    elif os.path.splitext(target)[-1] == '.pgc':
+        flags.append(' --format=Custom')
+        cmd = module.get_bin_path('pg_restore', True)
+
     elif os.path.splitext(target)[-1] == '.gz':
         comp_prog_path = module.get_bin_path('zcat', True)
 

test/integration/targets/postgresql_db/tasks/main.yml

@@ -18,6 +18,7 @@
   - dbdata.tar.gz
   - dbdata.tar.bz2
   - dbdata.tar.xz
+  - dbdata.pgc
   loop_control:
     loop_var: loop_item