cline/.changeset/cli-stdin-hang.md at a335cb5aee1847d4b8f9185d38dcd2ffdb8bfa6a

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Robin Newhouse b1a8db252a fix(cli): prevent hang when spawned without TTY (#9073 )

* fix(cli): prevent hang when spawned without TTY

When the CLI is spawned as a child process without a TTY (e.g., from
spawn() in smoke tests or CI), process.stdin.isTTY is false even when
nothing is piped to stdin. This caused readStdinIfPiped() to wait up
to 5 minutes for input that would never arrive.

Fix by using fs.fstatSync(0) to check if stdin is actually a FIFO
(pipe) or file before waiting. This correctly handles:
- Spawned processes without TTY → returns immediately
- Actual piped input (echo "x" | cline) → waits and reads
- stdin from /dev/null → returns immediately

* chore: add changeset

* test(cli): add tests for stdin type detection

2026-02-03 13:45:56 -08:00

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cline

cline
patch

fix(cli): prevent hang when spawned without TTY

72 B Raw Blame History

72 B

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