GitSCM: set Git user on local clone

src/lando/main/scm/git.py

@@ -9,6 +9,7 @@
 
 from lando.main.scm.consts import SCM_TYPE_GIT
 from lando.main.scm.exceptions import SCMException
+from lando.settings import LANDO_USER_EMAIL, LANDO_USER_NAME
 
 from .abstract_scm import AbstractSCM
 
@@ -47,6 +48,12 @@ def clone(self, source: str):
         """Clone a repository from a source."""
         # When cloning, self.path doesn't exist yet, so we need to use another CWD.
         self._git_run("clone", source, self.path, cwd="/")
+        self._git_setup_user()
+
+    def _git_setup_user(self):
+        """Configure the git user locally to repo_dir so as not to mess with the real user's configuration."""
+        self._git_run("config", "user.name", LANDO_USER_NAME, cwd=self.path)
+        self._git_run("config", "user.email", LANDO_USER_EMAIL, cwd=self.path)
 
     def push(
         self,
@@ -158,7 +165,13 @@ def format_stack_amend(self) -> Optional[list[str]]:
 
     def format_stack_tip(self, commit_message: str) -> Optional[list[str]]:
         """Add an autoformat commit to the top of the patch stack."""
-        self._git_run("commit", "--all", "--message", commit_message, cwd=self.path)
+        try:
+            self._git_run("commit", "--all", "--message", commit_message, cwd=self.path)
+        except SCMException as exc:
+            if "nothing to commit, working tree clean" in exc.out:
+                return []
+            else:
+                raise exc
         return [self.get_current_node()]
 
     def get_current_node(self) -> str: