Deprecate default_branch from LocalRepoOperator (#116)

# Motivation
<!-- Why is this change necessary? -->

# Content
<!-- Please include a summary of the change -->
# Testing
<!-- How was the change tested? -->
# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed
- [ ] I have read and agree to the [Contributor License
Agreement](../CLA.md)

Co-authored-by: codegen-bot <team+codegenbot@codegen.sh>

Author: Edward-Codegen

src/codegen/git/repo_operator/local_repo_operator.py

@@ -27,20 +27,17 @@ class LocalRepoOperator(RepoOperator):
 
     _repo_path: str
     _repo_name: str
-    _default_branch: str
     _git_cli: GitCLI
     repo_config: BaseRepoConfig
 
     def __init__(
         self,
         repo_config: BaseRepoConfig,
         repo_path: str,  # full path to the repo
-        default_branch: str,  # default branch of the repo
         bot_commit: bool = True,
     ) -> None:
         self._repo_path = repo_path
         self._repo_name = os.path.basename(repo_path)
-        self._default_branch = default_branch
         os.makedirs(self.repo_path, exist_ok=True)
         GitCLI.init(self.repo_path)
         super().__init__(repo_config, self.repo_path, bot_commit)
@@ -66,15 +63,15 @@ def create_from_files(cls, repo_path: str, files: dict[str, str], bot_commit: bo
         create_files(base_dir=repo_path, files=files)
 
         # Step 2: Init git repo
-        op = cls(repo_path=repo_path, default_branch="main", bot_commit=bot_commit, repo_config=repo_config)
+        op = cls(repo_path=repo_path, bot_commit=bot_commit, repo_config=repo_config)
         if op.stage_and_commit_all_changes("[Codegen] initial commit"):
-            op.checkout_branch(op.default_branch, create_if_missing=True)
+            op.checkout_branch(None, create_if_missing=True)
         return op
 
     @classmethod
-    def create_from_commit(cls, repo_path: str, default_branch: str, commit: str, url: str) -> Self:
+    def create_from_commit(cls, repo_path: str, commit: str, url: str) -> Self:
         """Do a shallow checkout of a particular commit to get a repository from a given remote URL."""
-        op = cls(repo_config=BaseRepoConfig(), repo_path=repo_path, default_branch=default_branch, bot_commit=False)
+        op = cls(repo_config=BaseRepoConfig(), repo_path=repo_path, bot_commit=False)
         if op.get_active_branch_or_commit() != commit:
             op.discard_changes()
             op.create_remote("origin", url)
@@ -104,8 +101,7 @@ def create_from_repo(cls, repo_path: str, url: str) -> Self:
                     remote_head = git_cli.remotes.origin.refs[git_cli.active_branch.name].commit
                     # If up to date, use existing repo
                     if local_head.hexsha == remote_head.hexsha:
-                        default_branch = git_cli.active_branch.name
-                        return cls(repo_config=BaseRepoConfig(), repo_path=repo_path, default_branch=default_branch, bot_commit=False)
+                        return cls(repo_config=BaseRepoConfig(), repo_path=repo_path, bot_commit=False)
             except Exception:
                 # If any git operations fail, fallback to fresh clone
                 pass
@@ -121,9 +117,8 @@ def create_from_repo(cls, repo_path: str, url: str) -> Self:
 
         # Initialize with the cloned repo
         git_cli = GitCLI(repo_path)
-        default_branch = git_cli.active_branch.name
 
-        return cls(repo_config=BaseRepoConfig(), repo_path=repo_path, default_branch=default_branch, bot_commit=False)
+        return cls(repo_config=BaseRepoConfig(), repo_path=repo_path, bot_commit=False)
 
     ####################################################################################################################
     # PROPERTIES

src/codegen/git/repo_operator/repo_operator.py

@@ -86,7 +86,7 @@ def git_diff(self) -> str:
 
     @property
     def default_branch(self) -> str:
-        return self._default_branch
+        return self._default_branch or self.git_cli.active_branch.name
 
     @abstractmethod
     def codeowners_parser(self) -> CodeOwnersParser | None: ...

src/codegen/sdk/code_generation/current_code_codebase.py

@@ -36,7 +36,7 @@ def get_current_code_codebase(config: CodebaseConfig = DefaultConfig, subdirecto
     """Returns a Codebase for the code that is *currently running* (i.e. the Codegen repo)"""
     codegen_repo_path = get_graphsitter_repo_path()
     logger.info(f"Creating codebase from repo at: {codegen_repo_path} with base_path {get_codegen_codebase_base_path()}")
-    op = LocalRepoOperator(repo_path=codegen_repo_path, default_branch="develop", bot_commit=False, repo_config=BaseRepoConfig(respect_gitignore=False))
+    op = LocalRepoOperator(repo_path=codegen_repo_path, bot_commit=False, repo_config=BaseRepoConfig(respect_gitignore=False))
     config = config.model_copy(update={"base_path": get_codegen_codebase_base_path()})
     projects = [ProjectConfig(repo_operator=op, programming_language=ProgrammingLanguage.PYTHON, subdirectories=subdirectories, base_path=get_codegen_codebase_base_path())]
     codebase = Codebase(projects=projects, config=config)

src/codegen/sdk/core/codebase.py

@@ -142,7 +142,7 @@ def __init__(
             repo_path = os.path.abspath(repo_path)
             repo_config = BaseRepoConfig()
             main_project = ProjectConfig(
-                repo_operator=LocalRepoOperator(repo_config=repo_config, repo_path=repo_path, default_branch="main"),
+                repo_operator=LocalRepoOperator(repo_config=repo_config, repo_path=repo_path),
                 programming_language=determine_project_language(repo_path),
             )
             projects = [main_project]

tests/shared/codemod/models.py

@@ -73,7 +73,7 @@ def to_op(self, name: str, token: str | None) -> LocalRepoOperator:
             if '[credential "https://github.codegen.app"]' not in (Path.home() / ".gitconfig").read_text():
                 os.system("gh auth login -h github.codegen.app")
                 os.system("gh auth setup-git -h github.codegen.app")
-        return LocalRepoOperator.create_from_commit(str(base_path), self.default_branch, self.commit, url)
+        return LocalRepoOperator.create_from_commit(str(base_path), self.commit, url)
 
 
 @dataclass