Method _parse_update_file_sections

aider/coders/patch_coder.py:412–514

Parses all sections (@@, context, -, +) for a single Update File action.

(
        self, lines: List[str], index: int, file_content: str
    )

        return patch

    def _parse_update_file_sections(
        self, lines: List[str], index: int, file_content: str
    ) -> Tuple[PatchAction, int, int]:
        """Parses all sections (@@, context, -, +) for a single Update File action."""
        action = PatchAction(type=ActionType.UPDATE, path="")  # Path set by caller
        orig_lines = file_content.splitlines()  # Use splitlines for consistency
        current_file_index = 0  # Track position in original file content
        total_fuzz = 0

        while index < len(lines):
            norm_line = _norm(lines[index])
            # Check for terminators for *this* file update
            if norm_line.startswith(
                (
                    "*** End Patch",
                    "*** Update File:",
                    "*** Delete File:",
                    "*** Add File:",
                )
            ):
                break  # End of this file's update section

            # Handle @@ scope lines (optional)
            scope_lines = []
            while index < len(lines) and _norm(lines[index]).startswith("@@"):
                scope_line_content = lines[index][len("@@") :].strip()
                if scope_line_content:  # Ignore empty @@ lines?
                    scope_lines.append(scope_line_content)
                index += 1

            # Find the scope in the original file if specified
            if scope_lines:
                # Simple scope finding: search from current position
                # A more robust finder could handle nested scopes like the reference @@ @@
                found_scope = False
                temp_index = current_file_index
                while temp_index < len(orig_lines):
                    # Check if all scope lines match sequentially from temp_index
                    match = True
                    for i, scope in enumerate(scope_lines):
                        if (
                            temp_index + i >= len(orig_lines)
                            or _norm(orig_lines[temp_index + i]).strip() != scope
                        ):
                            match = False
                            break
                    if match:
                        current_file_index = temp_index + len(scope_lines)
                        found_scope = True
                        break
                    temp_index += 1

                if not found_scope:
                    # Try fuzzy scope matching (strip whitespace)
                    temp_index = current_file_index
                    while temp_index < len(orig_lines):
                        match = True
                        for i, scope in enumerate(scope_lines):