generate the strict list in the build dir, so there won't be any funky path trouble

Author: wyattscarpenter

docs/source/command_line.rst

@@ -764,7 +764,7 @@ of the above sections.
     :option:`mypy --help` output.
 
     Note: the exact list of flags enabled by running :option:`--strict` may change
-    over time. For the current version of mypy, the list is:
+    over time. For the this version of mypy, the list is:
 
     .. include:: strict_list.rst
 

docs/source/html_builder.py

@@ -15,17 +15,18 @@
 
 
 class MypyHTMLBuilder(StandaloneHTMLBuilder):
+    strict_file: Path
     def __init__(self, app: Sphinx, env: BuildEnvironment) -> None:
         super().__init__(app, env)
         self._ref_to_doc = {}
+        self.strict_file = Path(self.outdir) / "strict_list.rst"
         self._add_strict_list()
 
     def write_doc(self, docname: str, doctree: document) -> None:
         super().write_doc(docname, doctree)
         self._ref_to_doc.update({_id: docname for _id in doctree.ids})
 
     def _add_strict_list(self) -> None:
-        p = Path(self.outdir).parent.parent / "source" / "strict_list.rst"
         strict_flags: list[str] = []
         process_options(["-c", "pass"], list_to_fill_with_strict_flags=strict_flags)
         strict_part = ", ".join(f":option:`{s} <mypy {s}>`" for s in strict_flags)
@@ -36,7 +37,7 @@ def _add_strict_list(self) -> None:
             or len(strict_part) > 2000
         ):
             raise ValueError(f"{strict_part=}, which doesn't look right (by a simple heuristic).")
-        p.write_text(strict_part)
+        self.strict_file.write_text(strict_part)
 
     def _verify_error_codes(self) -> None:
         from mypy.errorcodes import error_codes
@@ -72,6 +73,7 @@ def _write_ref_redirector(self) -> None:
     def finish(self) -> None:
         super().finish()
         self._write_ref_redirector()
+        self.strict_file.unlink()
 
 
 def setup(app: Sphinx) -> dict[str, Any]: