AdHocCache has no cache persistence

thus:

- no cache.path
- skip on-disk cache corruption tests for AdHocCache

src/borg/archiver/rinfo_cmd.py

@@ -59,16 +59,9 @@ class RInfoMixIn:
                 output += f" out of {format_file_size(storage_quota, iec=args.iec)}"
             output += "\n"
 
-            output += (
-                textwrap.dedent(
-                    """
-                    Cache: {cache.path}
-                    Security dir: {security_dir}
-                    """
-                )
-                .strip()
-                .format(**info)
-            )
+            if hasattr(info["cache"], "path"):
+                output += "Cache: {cache.path}\n".format(**info)
+            output += "Security dir: {security_dir}\n".format(**info)
 
             print(output)
             print(str(cache))

src/borg/testsuite/archiver/corruption.py

@@ -34,7 +34,7 @@ def test_check_corrupted_repository(archiver):
 def corrupt_archiver(archiver):
     create_test_files(archiver.input_path)
     cmd(archiver, "rcreate", RK_ENCRYPTION)
-    archiver.cache_path = json.loads(cmd(archiver, "rinfo", "--json"))["cache"]["path"]
+    archiver.cache_path = json.loads(cmd(archiver, "rinfo", "--json"))["cache"].get("path")
 
 
 def corrupt(file, amount=1):
@@ -48,6 +48,9 @@ def corrupt(file, amount=1):
 @pytest.mark.allow_cache_wipe
 def test_cache_chunks(archiver):
     corrupt_archiver(archiver)
+    if archiver.cache_path is None:
+        pytest.skip("no cache path for this kind of Cache implementation")
+
     create_src_archive(archiver, "test")
     chunks_path = os.path.join(archiver.cache_path, "chunks")
     chunks_before_corruption = set(ChunkIndex(path=chunks_path).iteritems())
@@ -74,6 +77,9 @@ def test_cache_chunks(archiver):
 
 def test_cache_files(archiver):
     corrupt_archiver(archiver)
+    if archiver.cache_path is None:
+        pytest.skip("no cache path for this kind of Cache implementation")
+
     cmd(archiver, "create", "test", "input")
     corrupt(os.path.join(archiver.cache_path, "files"))
     out = cmd(archiver, "create", "test1", "input")
@@ -83,6 +89,9 @@ def test_cache_files(archiver):
 
 def test_chunks_archive(archiver):
     corrupt_archiver(archiver)
+    if archiver.cache_path is None:
+        pytest.skip("no cache path for this kind of Cache implementation")
+
     cmd(archiver, "create", "test1", "input")
     # Find ID of test1, so we can corrupt it later :)
     target_id = cmd(archiver, "rlist", "--format={id}{NL}").strip()
@@ -114,6 +123,9 @@ def test_chunks_archive(archiver):
 
 def test_old_version_interfered(archiver):
     corrupt_archiver(archiver)
+    if archiver.cache_path is None:
+        pytest.skip("no cache path for this kind of Cache implementation")
+
     # Modify the main manifest ID without touching the manifest ID in the integrity section.
     # This happens if a version without integrity checking modifies the cache.
     config_path = os.path.join(archiver.cache_path, "config")