Function write_cache

mypy/build.py:2269–2405

Write cache files for a module. Note that this mypy's behavior is still correct when any given write_cache() call is replaced with a no-op, so error handling code that bails without writing anything is okay. Args: id: module ID path: module path tree: the fully ch

(
    id: str,
    path: str,
    tree: MypyFile,
    dependencies: list[str],
    suppressed: list[str],
    suppressed_deps_opts: bytes,
    imports_ignored: dict[int, list[str]],
    dep_prios: list[int],
    dep_lines: list[int],
    old_interface_hash: bytes,
    trans_dep_hash: bytes,
    source_hash: str,
    ignore_all: bool,
    manager: BuildManager,
)

def write_cache(
    id: str,
    path: str,
    tree: MypyFile,
    dependencies: list[str],
    suppressed: list[str],
    suppressed_deps_opts: bytes,
    imports_ignored: dict[int, list[str]],
    dep_prios: list[int],
    dep_lines: list[int],
    old_interface_hash: bytes,
    trans_dep_hash: bytes,
    source_hash: str,
    ignore_all: bool,
    manager: BuildManager,
) -> tuple[bytes, tuple[CacheMeta, str] | None]:
    """Write cache files for a module.

    Note that this mypy's behavior is still correct when any given
    write_cache() call is replaced with a no-op, so error handling
    code that bails without writing anything is okay.

    Args:
      id: module ID
      path: module path
      tree: the fully checked module data
      dependencies: module IDs on which this module depends
      suppressed: module IDs which were suppressed as dependencies
      dep_prios: priorities (parallel array to dependencies)
      dep_lines: import line locations (parallel array to dependencies)
      old_interface_hash: the hash from the previous version of the data cache file
      source_hash: the hash of the source code
      ignore_all: the ignore_all flag for this module
      manager: the build manager (for pyversion, log/trace)

    Returns:
      A tuple containing the interface hash and inner tuple with CacheMeta
      that should be written and path to cache file (inner tuple may be None,
      if the cache data could not be written).
    """
    metastore = manager.metastore
    # For Bazel we use relative paths and zero mtimes.
    bazel = manager.options.bazel

    # Obtain file paths.
    meta_file, data_file, _ = get_cache_names(id, path, manager.options)
    manager.log(f"Writing {id} {path} {meta_file} {data_file}")

    # Update tree.path so that in bazel mode it's made relative (since
    # sometimes paths leak out).
    if bazel:
        tree.path = path

    plugin_data = manager.plugin.report_config_data(ReportConfigContext(id, path, is_check=False))

    # Serialize data and analyze interface
    if manager.options.fixed_format_cache:
        data_io = WriteBuffer()