1. Error Handling & Validation Current Issue: Limited validation and error handling # Current implementation lacks comprehensive error handling tmt.utils.git.git_clone( url=self.data.url, destination=repo_path, shallow=False, env=environment, logger=self._logger, ) Apply to __init__.py Improvement: def _clone_repository(self, guest: Guest, environment: dict) -> Path: """Clone repository with comprehensive error handling""" repo_path = self.step.plan.worktree / "repository" try: # Validate URL format if not self._is_valid_git_url(self.data.url): raise tmt.utils.PrepareError(f"Invalid git URL: {self.data.url}") # Check if URL is accessible if not self._is_url_accessible(self.data.url): raise tmt.utils.PrepareError(f"Cannot access repository: {self.data.url}") with self._url_clone_lock: if not repo_path.exists(): self.debug(f"Cloning repository from {self.data.url}") tmt.utils.git.git_clone( url=self.data.url, destination=repo_path, shallow=False, env=environment, logger=self._logger, ) if self.data.ref: self._checkout_ref(repo_path, self.data.ref) except (GitError, NetworkError) as e: raise tmt.utils.PrepareError(f"Failed to clone repository: {e}") return repo_path def _checkout_ref(self, repo_path: Path, ref: str) -> None: """Checkout specific ref with validation""" try: # Verify ref exists result = self.run( Command('git', 'rev-parse', '--verify', f'{ref}^{{commit}}'), cwd=repo_path, silent=True ) if result.returncode != 0: raise tmt.utils.PrepareError(f"Reference '{ref}' not found in repository") self.info('ref', ref, 'green') self.run(Command('git', 'checkout', '-f', ref), cwd=repo_path) except Exception as e: raise tmt.utils.PrepareError(f"Failed to checkout ref '{ref}': {e}") Apply to __init__.py 2. Repository Caching & Performance Current Issue: Always clones to the same path, no caching strategy repo_path = workdir / "repository" # Fixed path, no URL-based naming Apply to __init__.py Improvement: def _get_repository_path(self) -> Path: """Generate URL-specific repository path for better caching""" import hashlib # Create unique path based on URL and ref url_hash = hashlib.sha256(f"{self.data.url}#{self.data.ref or 'HEAD'}".encode()).hexdigest()[:12] repo_name = self.data.url.split('/')[-1].replace('.git', '') return self.step.plan.worktree / f"repo-{repo_name}-{url_hash}" def _should_update_repository(self, repo_path: Path) -> bool: """Check if repository needs updating""" if not repo_path.exists(): return True # Check if ref has changed try: result = self.run( Command('git', 'rev-parse', 'HEAD'), cwd=repo_path, silent=True ) current_commit = result.stdout.strip() # For branches, check if remote has updates if self.data.ref and not self._is_commit_hash(self.data.ref): self.run(Command('git', 'fetch', 'origin'), cwd=repo_path, silent=True) result = self.run( Command('git', 'rev-parse', f'origin/{self.data.ref}'), cwd=repo_path, silent=True ) remote_commit = result.stdout.strip() return current_commit != remote_commit except Exception: return True # If we can't check, better to update return False Apply to __init__.py 3. Security Considerations Current Issue: No URL validation or security checks Improvement: def _validate_repository_url(self, url: str) -> None: """Validate repository URL for security""" import urllib.parse parsed = urllib.parse.urlparse(url) # Check for allowed schemes allowed_schemes = {'https', 'http', 'ssh', 'git'} if parsed.scheme not in allowed_schemes: raise tmt.utils.PrepareError(f"Unsupported URL scheme: {parsed.scheme}") # Warn about insecure protocols if parsed.scheme == 'http': self.warn(f"Using insecure HTTP protocol for {url}") # Block potentially dangerous URLs dangerous_hosts = {'localhost', '127.0.0.1', '0.0.0.0'} if parsed.hostname in dangerous_hosts: raise tmt.utils.PrepareError(f"Blocked potentially dangerous host: {parsed.hostname}") Apply to __init__.py 4. Configuration Validation Current Issue: No validation of url/ref combination Improvement: def wake(self, data: PrepareShellData) -> None: """Enhanced validation during wake phase""" super().wake(data) # Validate configuration if self.data.ref and not self.data.url: raise tmt.utils.PrepareError("'ref' option requires 'url' to be specified") if self.data.url: self._validate_repository_url(self.data.url) # Validate ref format if provided if self.data.ref and not self._is_valid_ref_name(self.data.ref): raise tmt.utils.PrepareError(f"Invalid ref name: {self.data.ref}") Apply to __init__.py 5. Better Test Coverage Current Test: Basic integration test only Improvement: Add More Test Cases: # tests/prepare/shell/test.sh rlPhaseStartTest "Remote Script with Ref" rlRun "tmt -vvv run provision prepare finish plan -n url-with-ref" rlPhaseEnd rlPhaseStartTest "Invalid URL Handling" rlRun "tmt run provision prepare plan -n invalid-url" 2 "Should fail with invalid URL" rlAssertGrep "Invalid git URL" $rlRun_LOG rlPhaseEnd rlPhaseStartTest "Missing Ref Handling" rlRun "tmt run provision prepare plan -n missing-ref" 2 "Should fail with non-existent ref" rlAssertGrep "Reference.*not found" $rlRun_LOG rlPhaseEnd 6. Environment Variable Enhancement Current Implementation: Single environment variable Improvement: More Context Variables: # Add more useful environment variables environment.update({ self._cloned_repo_path_envvar_name: EnvVarValue(repo_path.resolve()), 'TMT_PREPARE_SHELL_URL': EnvVarValue(self.data.url), 'TMT_PREPARE_SHELL_REF': EnvVarValue(self.data.ref or 'HEAD'), 'TMT_PREPARE_SHELL_COMMIT': EnvVarValue(self._get_current_commit(repo_path)), }) High Priority: Error handling & validation - Critical for production use Security validation - Important for safety Configuration validation - Prevents user errors Medium Priority: Repository caching - Performance improvement Enhanced test coverage - Quality assurance Low Priority: Additional environment variables - Nice-to-have features