Bun Shell $: line by line stderr output

[DavertMik]

What is the problem this feature would solve?

Many processes like docker build or npm run build print output to stderr. To collect realtime stdout inside Bun Shell I can use

for await (let line of $`docker build`.lines()) {

However, these lines don't include stderr. It would be nice to receive stderr output as it can be as valuable as stdout

What is the feature you are proposing to solve the problem?

lines method can take options what output to handle

for await (let line of $`docker build`.lines({  stdout: true, stderr: true })) {

What alternatives have you considered?

Using pipes or using Bun.spawn but I prefer to see this as part of Bun Shell because I really like this feature

[zackradisic]

We could add: .lines({ stdout, stderr }) and also we plan to support redirecting stderr to stdout (2>&1) to achieve this as well

[DavertMik]

That would be great, thanks @zackradisic

[DavertMik]

Any plans to ship it in next Bun releases?

[DavertMik]

I also tried to use the following:

for await (let line of $(`docker build . 2>&1`).lines()) {

however, even I redirected all stderr to stdout, I don't see that output is printer by lines. The output is printed only in the end of command execution.

Is there a way to interactively receive all output line by line?

Is this feature planned in Bun?

@zackradisic