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#!/usr/bin/env python3
# Drop into a new shell environment with the same variables defined in a systemd
# unit file (for debugging purposes).
#
# USAGE:
# $ systemd-shell -u buildkite-agent-foundation-1.service
import argparse
import os
def parse_env(entry):
x = entry[12:].split("=", 1)
return x[0].removeprefix("\"").removesuffix("\""), x[1].removeprefix("\"").removesuffix("\"")
def run(unit):
envfile = []
print("--- Environment ---")
for line in open(f"/etc/systemd/system/{unit}").readlines():
if line.startswith("Environment="):
key, val = parse_env(line[:-1])
print(f"export {key}={val}")
envfile.append(f"{key}={val}")
else:
continue
print()
env = " ".join(envfile)
print("--- Command ---")
os.system(f"/usr/bin/env {env} /bin/sh")
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("-u", "--unit", type=str, required=True)
args = parser.parse_args()
run(args.unit)
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