anki/proto/protoc_wrapper.py

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#!/usr/bin/env
#
# Wrapper for protoc that strips the dirname from the output files,
# and generates mypy typechecking info.
import sys
import subprocess
import shutil
import os
(protoc, mypy_protobuf, proto, outdir) = sys.argv[1:]
# copy to current dir
basename = os.path.basename(proto)
shutil.copyfile(proto, basename)
# output filenames
without_ext = os.path.splitext(basename)[0]
pb2_py = without_ext + "_pb2.py"
pb2_pyi = without_ext + "_pb2.pyi"
# invoke protoc
subprocess.run([
protoc,
"--plugin=protoc-gen-mypy="+mypy_protobuf,
"--python_out=.",
"--mypy_out=.",
basename],
# mypy prints to stderr on success :-(
stderr=subprocess.DEVNULL,
check=True)
# move files into output
shutil.move(pb2_py, outdir + "/" + pb2_py)
shutil.move(pb2_pyi, outdir + "/" + pb2_pyi)