Mypy Processor

Purpose

Type-checks Python source files using mypy.

How It Works

Discovers .py files in the project (excluding common non-source directories), runs mypy on each file, and creates a stub file on success. A non-zero exit code from mypy fails the product.

This processor supports batch mode, allowing multiple files to be checked in a single mypy invocation for better performance.

If a mypy.ini file exists in the project root, it is automatically added as an extra input so that configuration changes trigger rebuilds.

Source Files

• Input: **/*.py
• Output: out/mypy/{flat_name}.mypy

Configuration

[processor.mypy]
linter = "mypy"                             # The mypy command to run
args = []                                    # Additional arguments to pass to mypy
extra_inputs = []                            # Additional files that trigger rebuilds (e.g. ["pyproject.toml"])

Using mypy.ini

Mypy automatically reads configuration from a mypy.ini file in the project root. This file is detected automatically and added as an extra input, so changes to it will trigger rebuilds without manual configuration.