Extend Autocompletion with task and taskrun expressions and the root available variables

[brian-mulier-p]

As a follow-up to https://github.com/kestra-io/kestra/issues/3331 we can extend autocompletion.

In the order of priority

Prio 1 - DONE

Add autocompletion for root attributes when in an empty Pebble

you type {{ and then cmd+Space will give you:

• [x] inputs
• [x] outputs
• [x] vars
• [x] trigger
• [x] execution
• [x] taskrun
• [x] task

Prio 2

• [x] task.id
• [x] task.type
• [x] flow.tenantId
• [x] envs DONE, not dynamically fetching envs for now
• [x] globals DONE, note dynamically fetching globals for now
• [ ] for EE, namespace variables e.g. {{ namespace.myvar }}

Out of scope for now

Those can be explored later if time is available

Prio 3

• [ ] Add autocompletion for Pebble functions when we're in Pebble {{...}} and there's a word ahead of the cursor
• [ ] Add autocompletion for Pebble filters when we type "|" inside Pebble
• [ ] Add autocompletion for plugin defaults

Prio 4

Context aware:

• taskrun.parentId

• taskrun.value

• taskrun.iteration

• taskrun.id NEED TO BE CONTEXT AWARE, POSTPONE TO 0.18

• taskrun.startDate NEED TO BE CONTEXT AWARE, POSTPONE TO 0.18

• taskrun.attemptsCount NEED TO BE CONTEXT AWARE, POSTPONE TO 0.18

• parents NEED TO BE CONTEXT AWARE, POSTPONE TO 0.18

[iamviqar]

@anna-geller @brian-mulier-p I would like to work on this .

Are we targeting Prio 2 as part of this task?

[anna-geller]

The Prio 2 only has an EE feature, so maybe you can focus on Prio 3? :)

[iamviqar]

Sure @anna-geller , can you please elaborate these requirements

Prio 3

1. Add autocompletion for Pebble functions when we're in Pebble {{...}} and there's a word ahead of the cursor
2. Add autocompletion for Pebble filters when we type "|" inside Pebble
3. Add autocompletion for plugin defaults

[anna-geller]

I have a feeling this might be too complex for new contributors

1. if you start typing a pebble function, you could get autocompletion for it https://kestra.io/docs/expressions/function -- this one is not super relevant so you can skip
2. same for filters https://kestra.io/docs/expressions/filter
3. autocompletion for https://kestra.io/docs/workflow-components/plugin-defaults

[iamviqar]

I have a feeling this might be too complex for new contributors

1. if you start typing a pebble function, you could get autocompletion for it https://kestra.io/docs/expressions/function -- this one is not super relevant so you can skip
2. same for filters https://kestra.io/docs/expressions/filter
3. autocompletion for https://kestra.io/docs/workflow-components/plugin-defaults

Thank you, @anna-geller for the details. I'm currently focused on #2197 and would like to take on this task once I've finished it.