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antigravity: remove _resolve_localhost /etc/hosts hack #328

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Merged
joycel-github merged 1 commit into from
Jul 17, 2026
Merged

antigravity: remove _resolve_localhost /etc/hosts hack #328

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26 changes: 0 additions & 26 deletions python/antigravity/harness_server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -450,28 +450,6 @@ def _enhance_config_from_env(config) -> None:
config.skills_paths.append(skills_dir)


def _resolve_localhost():
"""Ensure `localhost` resolves to 127.0.0.1.

Substrate actors run under gVisor with no runtime-injected /etc/hosts.
The antigravity SDK dials localharness at ws://localhost:<port>/
and Python's resolver needs `localhost` in /etc/hosts.
"""
try:
try:
with open("/etc/hosts", "r") as f:
if "localhost" in f.read():
return
except FileNotFoundError:
pass
with open("/etc/hosts", "a") as f:
f.write("127.0.0.1\tlocalhost\n")
except OSError as e:
print(
f"WARNING: could not ensure localhost in /etc/hosts: {e}", file=sys.stderr
)


def main():
parser = argparse.ArgumentParser(description="Antigravity gRPC Harness Server")
parser.add_argument(
Expand Down Expand Up @@ -501,10 +479,6 @@ def main():
print(f"ERROR: {e}", file=sys.stderr)
sys.exit(1)

# This is a hack, on Agent Substrate /etc/hosts end up not
# having this entry even if it's the OCI image.
_resolve_localhost()

asyncio.run(
_serve(
args.host,
Expand Down
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