Prevent PR builds from trashing our build caches

This requires flatpak/flatpak-github-actions#260 to be merged first.

Author: cr7pt0gr4ph7

.github/workflows/build.yml

@@ -14,6 +14,9 @@ on:
       ref:
         type: string
         required: true
+      save_cache:
+        type: boolean
+        default: false
     secrets:
       AZURE_CLIENT_ID:
         required: false
@@ -708,6 +711,7 @@ jobs:
         with:
           manifest-path: packaging/flatpak/org.mixxx.Mixxx.yaml
           arch: ${{ matrix.variant.arch }}
+          save-cache: ${{ inputs.save_cache }}
           build-bundle: false
           upload-artifact: false
 

.github/workflows/develop.yml

@@ -75,6 +75,7 @@ jobs:
     with:
       branch: ${{ github.head_ref || github.ref_name }}
       ref: ${{ github.ref }}
+      save_cache: false
 
   # This task is used as a probe for auto merge
   # In the future, it could also be used to perform a status update (e.g once the whole CI is passing + is ready for review, add a specific label such as `need review`)

.github/workflows/release.yml

@@ -32,6 +32,7 @@ jobs:
       publish: true
       branch: ${{ github.head_ref || github.ref_name }}
       ref: ${{ github.ref }}
+      save_cache: true
     secrets:
       AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
       AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}