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Merged
ilevkivskyi merged 1 commit into from
Dec 10, 2025
Merged

Fail on PyPy in main instead of setup.py #20389

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8 changes: 8 additions & 0 deletions mypy/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@

import argparse
import os
import platform
import subprocess
import sys
import time
Expand Down Expand Up @@ -40,6 +41,13 @@
if TYPE_CHECKING:
from _typeshed import SupportsWrite

if platform.python_implementation() == "PyPy":
sys.stderr.write(
"ERROR: Running mypy on PyPy is not supported yet.\n"
"To type-check a PyPy library please use an equivalent CPython version,\n"
"see https://github.com/mypyc/librt/issues/16 for possible workarounds.\n"
)
sys.exit(2)

orig_stat: Final = os.stat
MEM_PROFILE: Final = False # If True, dump memory profile
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9 changes: 0 additions & 9 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,22 +5,13 @@
import glob
import os
import os.path
import platform
import sys
from typing import TYPE_CHECKING, Any

if sys.version_info < (3, 10, 0): # noqa: UP036, RUF100
sys.stderr.write("ERROR: You need Python 3.10 or later to use mypy.\n")
exit(1)

if platform.python_implementation() == "PyPy":
sys.stderr.write(
"ERROR: Running mypy on PyPy is not supported yet.\n"
"To type-check a PyPy library please use an equivalent CPython version,\n"
"see https://github.com/mypyc/librt/issues/16 for possible workarounds.\n"
)
exit(1)

# we'll import stuff from the source tree, let's ensure is on the sys path
sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))

Expand Down