Updating GitHub actions [1]

.github/workflows/integration-test-suite.yaml

@@ -21,10 +21,11 @@ on:
 
   # Build every pull request, to check for regressions.
   pull_request:
+    branches: [ main ]
 
   # Build on branch updates
   push:
-    branches: [ github-ci ]
+    branches: [ main, github-ci ]
 
 
 ################################################################################
@@ -49,30 +50,46 @@ jobs:
 
     steps:
       - name: 'Clone Project'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: 'Setup Haskell'
-        uses: haskell/actions/setup@v2
+        uses: haskell-actions/setup@v2
         with:
-          ghc-version:   9.2
-          cabal-version: 3.6
+          ghc-version:   9.10
+          cabal-version: 3.12
 
       - name: 'Cabal - Configure'
         run: |
-            cabal update ${PROJECTFILE}
-            cabal clean  ${PROJECTFILE}
-            cabal freeze ${PROJECTFILE}
+            cabal update    ${PROJECTFILE}
+            cabal clean     ${PROJECTFILE}
+            cabal freeze    ${PROJECTFILE}
+            cabal configure ${PROJECTFILE} --enable-tests --enable-benchmarks --disable-documentation
+            cabal build all ${PROJECTFILE} --dry-run
+            # The last step generates dist-newstyle/cache/plan.json for the cache key.
 
-      - name: 'Cabal - Cache'
-        uses: actions/cache@v3
+      - name: 'Cabal - Cache [1]'
+        uses: actions/cache/restore@v4
+        id: cache
+        env:
+          key: ${{ runner.os }}-ghc-${{ steps.setup.outputs.ghc-version }}-cabal-${{ steps.setup.outputs.cabal-version }}
         with:
-          path: |
-            ~/.cabal/store
-            dist-newstyle
-          key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
-          # restore keys is a fall back when the freeze plan is different
-          restore-keys: |
-            ${{ runner.os }}-${{ matrix.ghc }}-
+          path: ${{ steps.setup.outputs.cabal-store }}
+          key: ${{ env.key }}-plan-${{ hashFiles('**/plan.json') }}
+          restore-keys: ${{ env.key }}-
+
+      - name: 'Cabal - Install dependencies'
+        # If we had an exact cache hit, the dependencies will be up to date.
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: cabal build all --only-dependencies
+
+      # Cache dependencies already here, so that we do not have to rebuild them should the subsequent steps fail.
+      - name: 'Cabal - Cache [2]'
+        uses: actions/cache/save@v4
+        # If we had an exact cache hit, trying to save the cache would error because of key clash.
+        if: steps.cache.outputs.cache-hit != 'true'
+        with:
+          path: ${{ steps.setup.outputs.cabal-store }}
+          key: ${{ steps.cache.outputs.cache-primary-key }}
 
       - name: 'Cabal - Build'
         run: |