Extend new Git Backend

conda_forge_tick/contexts.py

@@ -1,10 +1,17 @@
+from __future__ import annotations
+
 import os
+import tempfile
 import typing
+from collections.abc import Iterator
+from contextlib import contextmanager
 from dataclasses import dataclass
+from pathlib import Path
 
 from networkx import DiGraph
 
 from conda_forge_tick.lazy_json_backends import load
+from conda_forge_tick.utils import get_keys_default
 
 if typing.TYPE_CHECKING:
     from conda_forge_tick.migrators_types import AttrsTypedDict
@@ -27,10 +34,10 @@ class MigratorSessionContext:
     dry_run: bool = True
 
 
-@dataclass
+@dataclass(frozen=True)
 class FeedstockContext:
     feedstock_name: str
-    attrs: "AttrsTypedDict"
+    attrs: AttrsTypedDict
     _default_branch: str = None
 
     @property
@@ -40,6 +47,73 @@ def default_branch(self):
         else:
             return self._default_branch
 
-    @default_branch.setter
-    def default_branch(self, v):
-        self._default_branch = v
+    @property
+    def git_repo_owner(self) -> str:
+        return "conda-forge"
+
+    @property
+    def git_repo_name(self) -> str:
+        return f"{self.feedstock_name}-feedstock"
+
+    @property
+    def git_href(self) -> str:
+        """
+        A link to the feedstocks GitHub repository.
+        """
+        return f"https://github.com/{self.git_repo_owner}/{self.git_repo_name}"
+
+    @property
+    def automerge(self) -> bool | str:
+        """
+        Get the automerge setting of the feedstock.
+
+        Note: A better solution to implement this is to use the NodeAttributes Pydantic
+        model for the attrs field. This will be done in the future.
+        """
+        return get_keys_default(
+            self.attrs,
+            ["conda-forge.yml", "bot", "automerge"],
+            {},
+            False,
+        )
+
+    @property
+    def check_solvable(self) -> bool:
+        """
+        Get the check_solvable setting of the feedstock.
+
+        Note: A better solution to implement this is to use the NodeAttributes Pydantic
+        model for the attrs field. This will be done in the future.
+        """
+        return get_keys_default(
+            self.attrs,
+            ["conda-forge.yml", "bot", "check_solvable"],
+            {},
+            False,
+        )
+
+    @contextmanager
+    def reserve_clone_directory(self) -> Iterator[ClonedFeedstockContext]:
+        """
+        Reserve a temporary directory for the feedstock repository that will be available within the context manager.
+        The returned context object will contain the path to the feedstock repository in local_clone_dir.
+        After the context manager exits, the temporary directory will be deleted.
+        """
+        with tempfile.TemporaryDirectory() as tmpdir:
+            local_clone_dir = Path(tmpdir) / self.git_repo_name
+            local_clone_dir.mkdir()
+            yield ClonedFeedstockContext(
+                **self.__dict__,
+                local_clone_dir=local_clone_dir,
+            )
+
+
+@dataclass(frozen=True, kw_only=True)
+class ClonedFeedstockContext(FeedstockContext):
+    """
+    A FeedstockContext object that has reserved a temporary directory for the feedstock repository.
+    """
+
+    # Implementation Note: Keep this class frozen or there will be consistency issues if someone modifies
+    # a ClonedFeedstockContext object in place - it will not be reflected in the original FeedstockContext object.
+    local_clone_dir: Path