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Fix a race in the fake claude args file #2

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Merged
icntswm merged 1 commit into from
Sep 28, 2026
Merged

Fix a race in the fake claude args file #2

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8 changes: 6 additions & 2 deletions test/bin/fake-claude.mjs
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Original file line number Diff line number Diff line change
@@ -1,18 +1,22 @@
#!/usr/bin/env node
// Fake `claude` binary for adapter tests: prints a fixture stream and
// behaves according to the FAKE_* environment variables.
import { readFileSync, writeFileSync } from "node:fs";
import { readFileSync, renameSync, writeFileSync } from "node:fs";

if (process.env.FAKE_ARGS_OUT) {
// write then rename: a test that polls for the file and kills this process
// must never read it half-written
const tmp = `${process.env.FAKE_ARGS_OUT}.${process.pid}.tmp`;
writeFileSync(
process.env.FAKE_ARGS_OUT,
tmp,
JSON.stringify({
args: process.argv.slice(2),
cwd: process.cwd(),
claudeProjectDir: process.env.CLAUDE_PROJECT_DIR ?? null,
claudeConfigDir: process.env.CLAUDE_CONFIG_DIR ?? null,
}),
);
renameSync(tmp, process.env.FAKE_ARGS_OUT);
}

if (process.env.FAKE_STDERR) process.stderr.write(process.env.FAKE_STDERR);
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