Best implementation to cache pnpm deps in github action

[y-nk]

When using mise, we can use it for pnpm as well, meaning that we can't really use pnpm/action-setup. similarly, the mise github action manages its own cache, but it seems we can't add more stuff in it (like runtime dependencies).

What's the best course of action? I can always implement my own actions/cache but i wonder if there's something more clever that i don't know about. How other did it?

[Nickalus12]

I usually just stick with actions/cache for the pnpm store path. Since jdx/mise-action is really intended to cache the mise binaries/tools themselves, trying to shove app-level dependencies in there is usually a headache.

The cleanest way is to let mise initialize your tools, then grab the store path dynamically so the cache stays isolated to the specific environment mise creates:

- uses: jdx/mise-action@v2
- name: Get pnpm store path
  id: pnpm-cache
  run: echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_OUTPUT
- uses: actions/cache@v4
  with:
    path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
    key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
    restore-keys: |
      ${{ runner.os }}-pnpm-store-

This avoids any weirdness with pnpm/action-setup while keeping the workflow fast. lmk if that works for your setup.

[y-nk]

@Nickalus12 this is what i had too, but i hoped that maybe there was something better like, idk:

- uses: pnpm/action-setup@main
  with:
    install: false

and poof the cache would then be taken care of

[y-nk]

found there's somebody helping us here pnpm/action-setup#203