Placeholder that unfolds into multiple tasks

[voxpelli]

What is it?

This adds a new placeholder, {%}, which unfolds into multiple tasks – one for each input argument. The unfolded tasks gets assigned {1}, {2} etc instead of {%}.

Purpose

Be able to in parallell process a single npm task X times with a different argument each time.

Example

{
  "minimize-image": "some-cli-command",
  "build:image": "run-p 'minimize-image -- {%}' -- ./foo.png ./bar.png"
}

Same as:

run-p 'minimize-image -- ./foo.png' 'minimize-image -- ./bar.png'

Example using shell globbing

{
  "minimize-image": "some-cli-command",
  "build:image": "run-p 'minimize-image -- {%}' -- ./images/*.png"
}

---

Remains to move out of draft status:

• [x] Tests
• [x] Documentation
• [x] Passing CI

---

Originally submitted at: https://github.com/mysticatea/npm-run-all/pull/180

[bcomnes]

Neat!

[voxpelli]

Any chance this will clobber existing commands people have set up?

Shouldn't be. If people are using custom placeholders and expecting them to pass through, then that would be an extreme edge case :)