Improve CI

.github/workflows/test.yaml

@@ -15,38 +15,28 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         ghc: ['8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8']
-        cabal: ['3.8.1.0']
         include:
           - os: macOS-13
             ghc: '9.4'
-            cabal: '3.8.1.0'
           - os: macOS-13
             ghc: '9.6'
-            cabal: '3.8.1.0'
           - os: windows-latest
             ghc: '9.4'
-            cabal: '3.8.1.0'
           - os: windows-latest
             ghc: '9.6'
-            cabal: '3.8.1.0'
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install dependencies (Ubuntu)
       if: runner.os == 'Linux'
       run: |
         sudo apt-get -y update
         sudo apt-get -y install libtinfo6 libncurses6
 
-    - name: Install GHCup
-      uses: haskell/ghcup-setup@v1
-
-    - name: Install ghc/cabal
-      run: |
-        set -eux
-        ghcup install ghc --set ${{ matrix.ghc }}
-        ghcup install cabal --set ${{ matrix.cabal }}
-      shell: bash
+    - uses: haskell/ghcup-setup@v1
+      with:
+        ghc: ${{ matrix.ghc }}
+        cabal: latest
 
     - name: Build
       run: |
@@ -105,6 +95,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     env:
       MACOSX_DEPLOYMENT_TARGET: 10.13
+      HOMEBREW_CHANGE_ARCH_TO_ARM: 1
     strategy:
       fail-fast: false
       matrix:
@@ -119,23 +110,26 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Install GHCup
-        uses: haskell/ghcup-setup@v1
+      - name: Install prerequisites
+        run: |
+          bash .github/scripts/brew.sh git coreutils llvm@13 autoconf automake
+          echo PATH="$HOME/.brew/bin:$HOME/.brew/sbin:$HOME/.brew/opt/llvm@13/bin:$PATH" >> "$GITHUB_ENV"
+          echo CC="$HOME/.brew/opt/llvm@13/bin/clang" >> "$GITHUB_ENV"
+          echo CXX="$HOME/.brew/opt/llvm@13/bin/clang++" >> "$GITHUB_ENV"
+          echo LD=ld >> "$GITHUB_ENV"
+          echo AR="$HOME/.brew/opt/llvm@13/bin/llvm-ar" >> "$GITHUB_ENV"
+          echo RANLIB="$HOME/.brew/opt/llvm@13/bin/llvm-ranlib" >> "$GITHUB_ENV"
+
+      - uses: haskell/ghcup-setup@v1
+        with:
+          ghc: ${{ matrix.ghc }}
+          cabal: latest
 
       - name: Run build
         run: |
-          bash .github/scripts/brew.sh git coreutils llvm@13 autoconf automake
-          export PATH="$HOME/.brew/bin:$HOME/.brew/sbin:$HOME/.brew/opt/llvm@13/bin:$PATH"
-          export CC="$HOME/.brew/opt/llvm@13/bin/clang"
-          export CXX="$HOME/.brew/opt/llvm@13/bin/clang++"
-          export LD=ld
-          export AR="$HOME/.brew/opt/llvm@13/bin/llvm-ar"
-          export RANLIB="$HOME/.brew/opt/llvm@13/bin/llvm-ranlib"
           cabal update
           cabal test
           cabal bench
-        env:
-          HOMEBREW_CHANGE_ARCH_TO_ARM: 1
 
   freebsd:
     runs-on: ${{ matrix.os }}
@@ -153,42 +147,15 @@ jobs:
 
       - name: Install prerequisites
         run: |
-          sudo pkg install -y curl gcc gmp gmake ncurses perl5 libffi libiconv git bash misc/compat10x misc/compat11x misc/compat12x gmake autoconf
+          sudo pkg install -y curl gcc gmp gmake ncurses perl5 libffi libiconv git bash misc/compat10x misc/compat11x misc/compat12x gmake llvm14 autoconf
 
-      - name: Install GHCup
-        uses: haskell/ghcup-setup@v1
+      - uses: haskell/ghcup-setup@v1
+        with:
+          ghc: ${{ matrix.ghc }}
+          cabal: latest
 
       - name: Run build
         run: |
           cabal update
           cabal test
           cabal bench
-
-  # Emulation is incredibly slow and memory demanding. It seems that any
-  # executable with GHC RTS takes at least 7-8 Gb of RAM, so we can run
-  # `cabal` or `ghc` on their own, but cannot run them both at the same time,
-  # striking out `cabal test`. Instead we rely on system packages and invoke
-  # `ghc --make` manually, and even so `ghc -O` is prohibitively expensive.
-  emulated:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: true
-      matrix:
-        arch: ['s390x', 'ppc64le']
-    steps:
-    - uses: actions/checkout@v4
-    - uses: uraimo/[email protected]
-      timeout-minutes: 60
-      with:
-        arch: ${{ matrix.arch }}
-        distro: ubuntu_rolling
-        githubToken: ${{ github.token }}
-        install: |
-          apt-get update -y
-          apt-get install -y curl ghc libghc-tasty-quickcheck-dev libghc-syb-dev
-        run: |
-          ghc --version
-          ghc --make -itests:tests/bytestring-tests -o Main tests/bytestring-tests/Main.hs +RTS -s
-          ./Main +RTS -s
-          ghc --make -itests:tests/encoding -o Main tests/encoding/Main.hs +RTS -s
-          ./Main +RTS -s