CI quick-jobs: use preinstalled GHC and Cabal

.github/workflows/quick-jobs.yml

@@ -24,21 +24,23 @@ jobs:
         with:
           path: ~/.local/state/cabal
           key: linux-store-meta
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        if: runner.os == 'Linux'
-        run: |
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo mkdir -p /usr/local/.ghcup/cache
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo chown -R "${USER}" /usr/local/.ghcup
-            sudo chmod -R 777 /usr/local/.ghcup
-      - name: ghcup
-        run: |
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc recommended
-          ghcup set ghc recommended
+      # OBSOLETE: workaround to fix ghcup directory rights.
+      # # See https://github.com/haskell/cabal/pull/8739
+      # - name: Sudo chmod to permit ghcup to update its cache
+      #   if: runner.os == 'Linux'
+      #   run: |
+      #       sudo ls -lah /usr/local/.ghcup/cache
+      #       sudo mkdir -p /usr/local/.ghcup/cache
+      #       sudo ls -lah /usr/local/.ghcup/cache
+      #       sudo chown -R "${USER}" /usr/local/.ghcup
+      #       sudo chmod -R 777 /usr/local/.ghcup
+      # SKIP installation of ghc and cabal and use the preinstalled versions.
+      # - name: ghcup
+      #   run: |
+      #     ghcup --version
+      #     ghcup config set cache true
+      #     ghcup install ghc recommended
+      #     ghcup set ghc recommended
       - name: Update Hackage index
         run: cabal v2-update
       - name: Install alex
@@ -62,21 +64,6 @@ jobs:
         with:
           path: ~/.local/state/cabal
           key: linux-store-doctest
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        if: runner.os == 'Linux'
-        run: |
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo mkdir -p /usr/local/.ghcup/cache
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo chown -R "${USER}" /usr/local/.ghcup
-            sudo chmod -R 777 /usr/local/.ghcup
-      - name: ghcup
-        run: |
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc --set recommended
-          ghcup install cabal --set latest
       - name: Update Hackage index
         run: cabal v2-update
       - uses: actions/checkout@v4
@@ -92,21 +79,6 @@ jobs:
         with:
           path: ~/.local/state/cabal
           key: linux-store-buildinfo-doc-diff
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        if: runner.os == 'Linux'
-        run: |
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo mkdir -p /usr/local/.ghcup/cache
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo chown -R "${USER}" /usr/local/.ghcup
-            sudo chmod -R 777 /usr/local/.ghcup
-      - name: ghcup
-        run: |
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc --set recommended
-          ghcup install cabal --set latest
       - name: Update Hackage index
         run: cabal v2-update
       - uses: actions/checkout@v4
@@ -116,12 +88,6 @@ jobs:
     name: Check Release Project
     runs-on: ubuntu-latest
     steps:
-      - name: ghcup
-        run: |
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc --set recommended
-          ghcup install cabal --set latest
       - name: Update Hackage Index
         run: cabal v2-update
       - uses: actions/checkout@v4