Error handling

Nobody has claimed this yet.

I want to handle errors with promises. I have promisified pipe method with bluebird, so my code looks like this
```
return writerPipe(
mkdirp(csvPath).catch((error) => {
return Promise.reject('error');
})
)
.then(() => {.....
```
I'm not able to reject or resolve inside mkdrip(it's alternative for createWriteStream).
So actually I want to handle errors for this line and so on.
`csvWriter.pipe(fs.createWriteStream(csvPath));`
if I could call a callback like this `csvWriter.pipe(fs.createWriteStream(csvPath), callback);` It would be grat
What can I do? Thanks

Start with the csvWriter.pipe(fs.createWriteStream(csvPath)) call and the promisified writerPipe usage described in the issue; trace how errors from mkdirp and fs.createWriteStream are currently surfaced. Define completion as making those errors observable through the promise-based flow, then verify the resulting behavior with the repository's existing tests or stream usage examples.

Written by the indexing model from the issue text.