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#!/usr/bin/env python3
"""
Generate the compile expansions file used by Evergreen as part of the push/release process.
Invoke by specifying an output file.
$ python generate_compile_expansions.py --out compile_expansions.yml
"""
import argparse
import os
import sys
import shlex
import yaml
VERSION_JSON = "version.json"
def generate_expansions():
"""Entry point for the script.
This calls functions to generate version and scons cache expansions and
writes them to a file.
"""
args = parse_args()
expansions = {}
expansions.update(generate_scons_cache_expansions())
with open(args.out, "w") as out:
print("saving compile expansions to {0}: ({1})".format(args.out, expansions))
yaml.safe_dump(expansions, out, default_flow_style=False)
def parse_args():
"""Parse program arguments."""
parser = argparse.ArgumentParser()
parser.add_argument("--out", required=True)
return parser.parse_args()
def generate_scons_cache_expansions():
"""Generate scons cache expansions from some files and environment variables."""
expansions = {}
if sys.platform.startswith("win"):
system_id_path = r"c:\mongodb-build-system-id"
default_cache_path_base = r"z:\data\scons-cache"
else:
system_id_path = "/etc/mongodb-build-system-id"
default_cache_path_base = "/data/scons-cache"
if os.path.isfile(system_id_path):
with open(system_id_path, "r") as fh:
default_cache_path = os.path.join(default_cache_path_base, fh.readline().strip())
expansions["scons_cache_path"] = default_cache_path
scons_cache_mode = os.getenv("SCONS_CACHE_MODE")
if scons_cache_mode in (None, ""):
scons_cache_mode = "nolinked"
if os.getenv("USE_SCONS_CACHE") not in (None, False, "false", ""):
expansions[
"scons_cache_args"] = "--cache={0} --cache-signature-mode=validate --cache-dir={1}".format(
scons_cache_mode, shlex.quote(default_cache_path))
return expansions
if __name__ == "__main__":
generate_expansions()
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