ci: Enable hlint in haskell-ci

.github/workflows/haskell-ci.yml

@@ -100,6 +100,11 @@ jobs:
       - name: update cabal index
         run: |
           $CABAL v2-update -v
+      - name: cache (tools)
+        uses: actions/cache@v2
+        with:
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-6c71d9d3
+          path: ~/.haskell-ci-tools
       - name: install cabal-plan
         run: |
           mkdir -p $HOME/.cabal/bin
@@ -109,6 +114,12 @@ jobs:
           rm -f cabal-plan.xz
           chmod a+x $HOME/.cabal/bin/cabal-plan
           cabal-plan --version
+      - name: install hlint
+        run: |
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then HLINTVER=$(cd /tmp && (${CABAL} v2-install -v $ARG_COMPILER --dry-run hlint  --constraint='hlint >=3.2 && <3.3' |  perl -ne 'if (/\bhlint-(\d+(\.\d+)*)\b/) { print "$1"; last; }')); echo "HLint version $HLINTVER" ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then if [ ! -e $HOME/.haskell-ci-tools/hlint-$HLINTVER/hlint ]; then echo "Downloading HLint version $HLINTVER"; mkdir -p $HOME/.haskell-ci-tools; curl --write-out 'Status Code: %{http_code} Redirects: %{num_redirects} Total time: %{time_total} Total Dsize: %{size_download}\n' --silent --location --output $HOME/.haskell-ci-tools/hlint-$HLINTVER.tar.gz "https://github.com/ndmitchell/hlint/releases/download/v$HLINTVER/hlint-$HLINTVER-x86_64-linux.tar.gz"; tar -xzv -f $HOME/.haskell-ci-tools/hlint-$HLINTVER.tar.gz -C $HOME/.haskell-ci-tools; fi ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then mkdir -p $CABAL_DIR/bin && ln -sf "$HOME/.haskell-ci-tools/hlint-$HLINTVER/hlint" $CABAL_DIR/bin/hlint ; fi
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then hlint --version ; fi
       - name: checkout
         uses: actions/checkout@v2
         with:
@@ -171,6 +182,9 @@ jobs:
       - name: tests
         run: |
           $CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
+      - name: hlint
+        run: |
+          if [ $((HCNUMVER >= 90000)) -ne 0 ] ; then (cd ${PKGDIR_xmonad_contrib} && hlint -h ${GITHUB_WORKSPACE}/source/.hlint.yaml .) ; fi
       - name: cabal check
         run: |
           cd ${PKGDIR_xmonad_contrib} || false

cabal.haskell-ci

@@ -6,6 +6,9 @@ apt:
   libxrandr-dev
   libxss-dev
 
+hlint: True
+hlint-yaml: .hlint.yaml
+
 raw-project
   package xmonad-contrib
     flags: +pedantic