Add a MISE_TASK_OUTPUT="keep-order' to not mix the task output

[boris-smidt-klarrio]

Mise runs tasks in parallel and as a result the lines are mixed up between the tasks.
This makes it sometimes hard to follow why the task failed.

To solve this a new MISE_TASK_OUTPUT could be made named 'keep-order' inspired by GNU parallel.
When the keep-order is enabled the tasks are still run in parallel but the output of the task is ordered by the task.
It would be a useful feature to use in case of a CI output.

Here is an example of what parallel does, it would also keep the same order in case of a multiple line output:

printf "%s\0" {1..5} | parallel -r0 -n 1 -P 10 sha256sum
sha256sum: 1: No such file or directory
sha256sum: 5: No such file or directory
sha256sum: 2: No such file or directory
sha256sum: 4: No such file or directory
sha256sum: 3: No such file or directory

printf "%s\0" {1..5} | parallel --keep-order -r0 -n 1 -P 10 sha256sum
sha256sum: 1: No such file or directory
sha256sum: 2: No such file or directory
sha256sum: 3: No such file or directory
sha256sum: 4: No such file or directory
sha256sum: 5: No such file or directory

The disadvantage is that nothing appears until the previous task is finished.
An interactive user interface like a spindle could be used to show the current running tasks.

[jdx]

great suggestion 👍

[boris-smidt-klarrio]

@jdx Cool thank you for adding this feature.