feat: add a package manager detection workflow

[jackw]

This PR adds a new workflow to the repo that detects the node package manager for the currently checked out repo.

We have pm.sh duplicated throughout this repo and in other ci-workflows we're sniffing the existence of lock files directly in the steps to understand what plugins are using. This PR introduces a workflow that runs npx -y pm-detect on a directory and returns it's output for future workflows to use.

pm-detect returns a normalised map of the name of the package manager along with commands we want to run in CI.

NPM

npx -y pm-detect --working-dir ~/dev/jackw/heywesty-trafficlight-panel
{
  "name": "npm",
  "install": "npm install",
  "frozen-install": "npm ci",
  "global-install": "npm install -g",
  "run": "npm run",
  "exec": "npx"
}

Yarn

npx -y pm-detect --working-dir ~/dev/grafana/timestream-datasource
{
  "name": "yarn",
  "install": "yarn install",
  "frozen-install": "yarn install --frozen-lockfile",
  "global-install": "yarn global add",
  "run": "yarn run",
  "exec": "npx"
}

Yarn berry

npx -y pm-detect --working-dir ~/dev/grafana/app-o11y-kwl
{
  "name": "yarn",
  "install": "yarn install",
  "frozen-install": "yarn install --immutable",
  "global-install": "npm install -g",
  "run": "yarn run",
  "exec": "yarn dlx"
}

PNPM

npx -y pm-detect --working-dir ~/dev/grafana/slo
{
  "name": "pnpm",
  "install": "pnpm install",
  "frozen-install": "pnpm install --frozen-lockfile",
  "global-install": "pnpm add -g",
  "run": "pnpm run",
  "exec": "pnpm dlx"
}

[academo]

I wonder if we would be better of having this action as a "invoke pakage action" instead of having it returning the commands and then using the output to run those commands.

[jackw]

I wonder if we would be better of having this action as a "invoke pakage action" instead of having it returning the commands and then using the output to run those commands.

Can you expand on this idea a bit please I'm not following what "invoke package action" means? 🤔

[hugohaggmark]

Adding an approval if you want to try this out

[hugohaggmark]

Great work on this 🎉

[leventebalogh]

Nice 🚀