feat: add touch support (#9)

pyproject.toml

@@ -11,8 +11,8 @@ keywords = ["snakemake", "plugin", "storage", "filesystem", "rsync"]
 
 [tool.poetry.dependencies]
 python = "^3.11"
-snakemake-interface-common = "^1.14.2"
-snakemake-interface-storage-plugins = "^3.0.0"
+snakemake-interface-common = "^1.17.0"
+snakemake-interface-storage-plugins = "^3.1.0"
 sysrsync = "^1.1.1"
 reretry = "^0.11.8"
 

snakemake_storage_plugin_fs/__init__.py

@@ -23,13 +23,15 @@
     StorageObjectRead,
     StorageObjectWrite,
     StorageObjectGlob,
+    StorageObjectTouch,
 )
 from snakemake_interface_storage_plugins.io import (
     IOCacheStorageInterface,
     get_constant_prefix,
     Mtime,
 )
 from snakemake_interface_storage_plugins.settings import StorageProviderSettingsBase
+from snakemake_interface_common.utils import lutime
 
 
 @dataclass
@@ -137,7 +139,9 @@ def wrapper(self, *args, **kwargs):
 # storage (e.g. because it is read-only see
 # snakemake-storage-http for comparison), remove the corresponding base classes
 # from the list of inherited items.
-class StorageObject(StorageObjectRead, StorageObjectWrite, StorageObjectGlob):
+class StorageObject(
+    StorageObjectRead, StorageObjectWrite, StorageObjectGlob, StorageObjectTouch
+):
     # For compatibility with future changes, you should not overwrite the __init__
     # method. Instead, use __post_init__ to set additional attributes and initialize
     # futher stuff.
@@ -262,3 +266,15 @@ def _stat(self, follow_symlinks: bool = True):
         # We don't want the cached variant (Path.stat), as we cache ourselves in
         # inventory and afterwards the information may change.
         return os.stat(self.query_path, follow_symlinks=follow_symlinks)
+
+    def touch(self):
+        if self.query_path.exists():
+            if self.query_path.is_dir():
+                flag = self.query_path / ".snakemake_timestamp"
+                # Create the flag file if it doesn't exist
+                if not flag.exists():
+                    with open(flag, "w"):
+                        pass
+                lutime(flag, None)
+            else:
+                lutime(str(self.query_path), None)

tests/tests.py

@@ -10,6 +10,7 @@
 class TestStorageNoSettings(TestStorageBase):
     __test__ = True
     retrieve_only = False
+    touch = True
 
     def get_query(self, tmp_path) -> str:
         parent = f"{tmp_path}/storage/test/"