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msggen: Use tempfile + rename to make changes to .msggen.json atomic

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This was causing issues when multiple instances of msggen were running
in parallel on CI.

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This commit is contained in:
Christian Decker 2022-07-26 13:20:03 +02:00 • committed by neil saitug
parent 17b9bd5ca3
commit b55df5c626
1 changed files with 4 additions and 1 deletions
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5
contrib/msggen/msggen/__main__.py
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@ -1,4 +1,5 @@
import json import json
import os
from msggen.gen.grpc import GrpcGenerator, GrpcConverterGenerator, GrpcUnconverterGenerator, GrpcServerGenerator from msggen.gen.grpc import GrpcGenerator, GrpcConverterGenerator, GrpcUnconverterGenerator, GrpcServerGenerator
from msggen.gen.grpc2py import Grpc2PyGenerator from msggen.gen.grpc2py import Grpc2PyGenerator
from msggen.gen.rust import RustGenerator from msggen.gen.rust import RustGenerator
@ -41,8 +42,10 @@ def load_msggen_meta():
def write_msggen_meta(meta): def write_msggen_meta(meta):
with open('.msggen.json', 'w') as f: pid = os.getpid()
with open(f'.msggen.json.tmp.{pid}', 'w') as f:
json.dump(meta, f, sort_keys=True, indent=4) json.dump(meta, f, sort_keys=True, indent=4)
os.rename(f'.msggen.json.tmp.{pid}', '.msggen.json')
def run(): def run():