Matching outputs exactly with inputs

[rafaeltab]

Goals

1. Allow matching the outputs exactly to what the inputs were, this would make the configuration for format and lint:fix tasks much simpler.
2. Reduce need for support of $TURBO_DEFAULTS$, and $TURBO_EXTENDS$ in outputs

Non-goals

1. Change how outputs work fundamentally
2. Complicate the configuration of outputs
3. Supporting $TURBO_DEFAULTS$, and $TURBO_EXTENDS$ in outputs

Background

At times the inputs can become quite large, and for format tasks you almost always want to match the output exactly to what the input was. I figured it must be possible to do that more easily, but couldn't find any solution in the docs.

That is not to mention that the docs don't show any support for $TURBO_DEFAULTS$ or $TURBO_EXTENDS$ further complicating the definition of the outputs when trying to match them to the inputs.

Proposal

Add support for an $TURBO_INPUTS$ entry in the tasks.*.outputs field. This would take all the inputs considered for the task, and use those files as outputs for the task.

Before:

{
  "tasks": {
    "format:ts": {
      "inputs": [
        "**/*.ts",
        "**/*.mts",
        "**/*.cts",
        "**/*.js",
        "**/*.cjs",
        "**/*.mjs"
      ],
      "outputs": [
        "**/*.ts",
        "**/*.mts",
        "**/*.cts",
        "**/*.js",
        "**/*.cjs",
        "**/*.mjs"
      ],
     "cache": true
    }
  }
}

after:

{
  "tasks": {
    "format:ts": {
      "inputs": [
        "**/*.ts",
        "**/*.mts",
        "**/*.cts",
        "**/*.js",
        "**/*.cjs",
        "**/*.mjs"
      ],
      "outputs": [
        "$TURBO_INPUTS$"
      ],
     "cache": true
    }
  }
}