Create invalidations.yml (#93)

This is based on https://github.com/julia-actions/julia-invalidations. Adding such checks came up in https://discourse.julialang.org/t/potential-performance-regressions-in-julia-1-8-for-special-un-precompiled-type-dispatches-and-how-to-fix-them/86359. I suggest to add this check here since this package is widely used as a dependency.

RecipesBase/.github/workflows/invalidations.yml

@@ -0,0 +1,33 @@
+name: Invalidations
+on: pull_request
+
+jobs:
+ evaluate:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: julia-actions/setup-julia@v1
+ with:
+ version: '1'
+ - uses: actions/checkout@v2
+ - uses: julia-actions/julia-buildpkg@latest
+ - uses: julia-actions/julia-invalidations@v1
+ id: invs_pr
+
+ - uses: actions/checkout@v2
+ with:
+ ref: 'master'
+ - uses: julia-actions/julia-buildpkg@latest
+ - uses: julia-actions/julia-invalidations@v1
+ id: invs_master
+
+ - name: Report invalidation counts
+ run: |
+ echo "Invalidations on master: ${{ steps.invs_master.outputs.total }} (${{ steps.invs_master.outputs.deps }} via deps)"
+ echo "This branch: ${{ steps.invs_pr.outputs.total }} (${{ steps.invs_pr.outputs.deps }} via deps)"
+ shell: bash
+ - name: PR doesn't increase number of invalidations
+ run: |
+ if (( ${{ steps.invs_pr.outputs.total }} > ${{ steps.invs_master.outputs.total }} )); then
+ exit 1
+ fi
+ shell: bash