Long running tasks in parallel

[raine-works]

The ability to run tasks in all workspace projects recursively is very useful, specifically for build tasks, but it would be nice to be able to run long running tasks recursively in parallel similar to how Turborepo works.

[marvinhagemeister]

Related #26462

[bartlomieju]

Could you give an example command you want to run and the expected result?

[raine-works]

deno.json

{
    "workspace": [
        "apps/*"
    ],
}

apps/server/deno.json

{
    "tasks": {
        "dev": "deno run -A --env-file --watch src/mod.ts"
    }
}

apps/web/deno.json

{
    "tasks": {
        "dev": "deno run -A --node-modules-dir npm:vite"
    }
}

I want to be able to use the recursive flag to run these tasks. Currently when I try using deno task -r dev it starts one dev server and waits until the task is complete before starting the second dev server. The dev servers should run concurrently since they rely on each other. There are a few NPM tools that make this possible, but I think Turborepo does it best. Unfortunately Turborepo does not currently support Deno. One of things I have really enjoyed about Deno is most of the development tooling I use is built-in. If Deno handled workspaces similarly to Turborepo it would be perfect.

Below is a simple example of what the output could look like in the terminal.

vscode ➜ /workspaces/demo (main) $ deno task -r dev 
[0] Task dev deno run -A --env-file --watch src/mod.ts
[0] Watcher Process started.
[0] Listening on http://0.0.0.0:8000/
[1] VITE v6.0.7  ready in 158 ms
[1] ➜  Local:   http://127.0.0.1:3000/
[1] ➜  press h + enter to show help

Below is an example of how Turborepo represents concurrent processes in the terminal.

Something like this would be amazing, but honestly I don't really care what the output looks like as long as it works.

[bartlomieju]

Thanks for explanation. I think the current behavior might actually be buggy. Deno should run recursive tasks in parallel if the topology allows for that.

[dannylindquist]

In case it's needed, here is minimal reproduction.
https://github.com/dannylindquist/deno-workspace-watch-repro

Also just ran into this error.