CI: force MacOS jobs to use Intel runners (macos-13) (backport #9949) (#9956)

* CI: force MacOS jobs to use Intel runners (`macos-13`)

GitHub just switched macos-latest to the ARM chips (now alisasing
`macos-14`), and it brings a bunch of problems.

- First of all, GHC's 8.8 and 8.6 don't exist there.
- ghcup and llvm are unavailable

For the time being, lets stay on the previous version of the runner.

(cherry picked from commit d36e0d0)

* CI: GitHub MacOS runners lost ghcup since 2024-04-27, so use haskell-action/setup instead

(cherry picked from commit 082d952)

* fixup! more compat with new macos runners

(cherry picked from commit 326a1f6)

* !fixup resolve conflicts

* copy an import list from #9551

because `System.Process.Internals` just (like, within the past
hour or so) started exporting a name we are using.

---------

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>
Co-authored-by: brandon s allbery kf8nh <allbery.b@gmail.com>

Author: 3 people

.github/workflows/bootstrap.yml

@@ -52,28 +52,18 @@ jobs:
           restore-keys: bootstrap-${{ runner.os }}-${{ matrix.ghc }}-20221115-
 
       - uses: actions/checkout@v4
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        run: |
-          if [[ "${{ runner.os }}" == "Linux" ]]; then
-            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
-          fi
+      - uses: haskell-actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+
       - name: bootstrap.py
         run: |
           GHC_VERSION=${{ matrix.ghc }}
-          ghcup --version
-          ghcup config set cache true
-          ghcup install ghc $GHC_VERSION
-
           # Fetch the bootstrap sources (we use linux dependencies also on macos)
-          python3 bootstrap/bootstrap.py -w $(ghcup whereis ghc $GHC_VERSION) -d bootstrap/linux-$GHC_VERSION.json fetch
+          python3 bootstrap/bootstrap.py -d bootstrap/linux-$GHC_VERSION.json fetch
 
           # Bootstrap using the bootstrap sources
-          python3 bootstrap/bootstrap.py -w $(ghcup whereis ghc $GHC_VERSION) --bootstrap-sources bootstrap-sources.tar.gz
+          python3 bootstrap/bootstrap.py --bootstrap-sources bootstrap-sources.tar.gz
 
       - name: Smoke test
         run: |

cabal-testsuite/PackageTests/Manpage/cabal.test.hs

@@ -7,8 +7,8 @@ main = cabalTest $ do
     assertOutputContains ".B cabal install" r
     assertOutputDoesNotContain ".B cabal manpage" r
 
-    -- The following test of `cabal man` needs `nroff` which is not available under Windows.
-    unless (buildOS == Windows) $ do
+    -- The following test of `cabal man` needs `nroff` which is not available under Windows and OSX.
+    unless (buildOS == Windows || buildOS ==OSX) $ do
 
       -- Check that output of `cabal man --raw` can be passed through `nroff -man`
       -- without producing any warnings (which are printed to stderr).