feat: support set +e / set +o errexit#171
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Replace the opaque `is_async` boolean with two orthogonal flags — `is_async` (was `&`) and `ends_line` (followed by `\n` / `\r\n`) — so consumers can apply different semantics per boundary. In particular, `cmd &\nnext` is now represented as `is_async: true, ends_line: true` instead of losing the newline.
Abort a sequential list at the first non-zero command when the errexit option is enabled. Failure inside `&&` / `||` chains or pipelines is unaffected, matching bash semantics.
This was referenced May 12, 2026
bartlomieju
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May 20, 2026
bartlomieju
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May 20, 2026
Picks up two upstream changes in deno_task_shell: support for `set -e` / `set +e` (and the `set -o errexit` long form), which aborts the surrounding sequential list on the first non-zero exit, and the POSIX null command `:` as a builtin. See denoland/deno_task_shell#171 and denoland/deno_task_shell#175.
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