Class BuildManager

mypy/build.py:788–1586

This class holds shared state for building a mypy program. It is used to coordinate parsing, import processing, semantic analysis and type checking. The actual build steps are carried out by dispatch(). Attributes: data_dir: Mypy data directory (contains stubs)

class BuildManager:
    """This class holds shared state for building a mypy program.

    It is used to coordinate parsing, import processing, semantic
    analysis and type checking.  The actual build steps are carried
    out by dispatch().

    Attributes:
      data_dir:        Mypy data directory (contains stubs)
      search_paths:    SearchPaths instance indicating where to look for modules
      modules:         Mapping of module ID to MypyFile (shared by the passes)
      semantic_analyzer:
                       Semantic analyzer, pass 2
      all_types:       Map {Expression: Type} from all modules (enabled by export_types)
      options:         Build options
      missing_modules: Modules that could not be imported (or intentionally skipped)
      stale_modules:   Set of modules that needed to be rechecked (only used by tests)
      fg_deps_meta:    Metadata for fine-grained dependencies caches associated with modules
      fg_deps:         A fine-grained dependency map
      version_id:      The current mypy version (based on commit id when possible)
      plugin:          Active mypy plugin(s)
      plugins_snapshot:
                       Snapshot of currently active user plugins (versions and hashes)
      old_plugins_snapshot:
                       Plugins snapshot from previous incremental run (or None in
                       non-incremental mode and if cache was not found)
      errors:          Used for reporting all errors
      flush_errors:    A function for processing errors after each SCC
      cache_enabled:   Whether cache is being read. This is set based on options,
                       but is disabled if fine-grained cache loading fails
                       and after an initial fine-grained load. This doesn't
                       determine whether we write cache files or not.
      quickstart_state:
                       A cache of filename -> mtime/size/hash info used to avoid
                       needing to hash source files when using a cache with mismatching mtimes
      stats:           Dict with various instrumentation numbers, it is used
                       not only for debugging, but also required for correctness,
                       in particular to check consistency of the fine-grained dependency cache.
      fscache:         A file system cacher
      ast_cache:       AST cache to speed up mypy daemon
    """

    def __init__(
        self,
        data_dir: str,
        search_paths: SearchPaths,
        ignore_prefix: str,
        source_set: BuildSourceSet,
        reports: Reports | None,
        options: Options,
        version_id: str,
        plugin: Plugin,
        plugins_snapshot: dict[str, str],
        errors: Errors,
        flush_errors: Callable[[str | None, list[str], bool], None],
        fscache: FileSystemCache,
        stdout: TextIO,
        stderr: TextIO,