[trivikr]

commitStream()'s transform called addLine() without a try/catch. When a line came before the first commit header, the parse error was thrown out of transform and never passed to callback. A direct write() threw synchronously instead of emitting 'error'. The message (Something unexpected occurred) also didn't say what was wrong.

const stream = commitStream()
stream.on('error', (err) => console.log('error event:', err.message))
stream.write('garbage')
// expected: error event: Unexpected line before first "commit" header: garbage
// actual:   throws Error: Something unexpected occurred

This PR passes the error to callback(err) and changes the message to Unexpected line before first "commit" header: <line>. It also adds regression tests for write() and pipeline().

[rvagg]

needs a rebuil and comitted types/commit-stream.d.ts.map.

[github-actions]

🎉 This PR is included in version 3.0.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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