Set Fourmolu as formatter

.github/workflows/check-stylish-haskell.yml → .github/workflows/check-fourmolu.yml

@@ -1,4 +1,4 @@
-name: Check Stylish Haskell
+name: Check Fourmolu 
 
 on:
   merge_group:
@@ -19,64 +19,55 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  check-stylish-haskell:
+  check-fourmolu:
     runs-on: ubuntu-latest
 
-    strategy:
-      fail-fast: false
-
     env:
-      # Modify this value to "invalidate" the cabal cache.
-      CABAL_CACHE_VERSION: "2023-07-12"
-
-      STYLISH_HASKELL_VERSION: "0.14.4.0"
-
-      STYLISH_HASKELL_PATHS: >
-        cardano-api
+      FOURMOLU_VERSION: "0.16.2.0"
 
     steps:
-    - name: Download stylish-haskell
+    - name: Download Fourmolu
       run: |
-        version="${{ env.STYLISH_HASKELL_VERSION }}"
-
+        fourmolu_path="$(mktemp -d)"
+        version="${{env.FOURMOLU_VERSION}}"
         curl -sL \
-          "https://github.com/haskell/stylish-haskell/releases/download/v$version/stylish-haskell-v$version-linux-x86_64.tar.gz" \
-          | tar -C "/tmp" -xz
-
-        echo "PATH=/tmp/stylish-haskell-v$version-linux-x86_64:$PATH" >> "$GITHUB_ENV"
+          "https://github.com/fourmolu/fourmolu/releases/download/v$version/fourmolu-$version-linux-x86_64" > "$fourmolu_path/fourmolu"
+        echo "PATH=$fourmolu_path:$PATH" >> "$GITHUB_ENV"
+        chmod u+rwx "$fourmolu_path/fourmolu"
 
     - uses: actions/checkout@v3
 
-    - name: Run stylish-haskell over all Haskell files (always succeeds)
+    - name: Run Fourmolu over all Haskell files (always succeeds)
       run: |
         git add .
         git stash
 
-        for x in $(git ls-tree --full-tree --name-only -r HEAD ${{ env.STYLISH_HASKELL_PATHS }}); do
+        for x in $(git ls-tree --full-tree --name-only -r HEAD); do
           if [ "${x##*.}" == "hs" ]; then
             if grep -qE '^#' "$x"; then
               echo "$x contains CPP.  Skipping."
             else
-              stylish-haskell -i "$x"
+              fourmolu -q -i "$x"
             fi
           fi
         done
 
         git --no-pager diff
 
-    - name: Run stylish-haskell over all modified files
+    - name: Run Fourmolu over all modified files
       run: |
         git add .
         git stash
         git fetch origin ${{ github.base_ref }} --unshallow
-        for x in $(git diff --name-only --diff-filter=ACMR origin/${{ github.base_ref }}..HEAD ${{ env.STYLISH_HASKELL_PATHS }}); do
+        for x in $(git diff --name-only --diff-filter=ACMR origin/${{ github.base_ref }}..HEAD); do
           if [ "${x##*.}" == "hs" ]; then
             if grep -qE '^#' "$x"; then
               echo "$x contains CPP.  Skipping."
             else
-              stylish-haskell -i "$x"
+              fourmolu -q -i "$x"
             fi
           fi
         done
 
         git --no-pager diff --exit-code
+

cardano-api-gen/src/Test/Gen/Cardano/Api/Empty.hs

@@ -1,5 +1,5 @@
 module Test.Gen.Cardano.Api.Empty where
 
-import           Test.Gen.Cardano.Api ()
+import Test.Gen.Cardano.Api ()
 
 -- | This module is empty, but it is needed to prevent unused-packages warning

cardano-api/gen/Test/Gen/Cardano/Api.hs

@@ -6,7 +6,8 @@
 module Test.Gen.Cardano.Api
   ( genMetadata
   , genAlonzoGenesis
-  ) where
+  )
+where
 
 import qualified Cardano.Ledger.Alonzo.Core as Ledger
 import qualified Cardano.Ledger.Alonzo.Genesis as Alonzo
@@ -15,21 +16,18 @@ import qualified Cardano.Ledger.BaseTypes as Ledger
 import qualified Cardano.Ledger.Coin as Ledger
 import qualified Cardano.Ledger.Plutus.CostModels as Plutus
 import qualified Cardano.Ledger.Plutus.Language as Alonzo
-import           Cardano.Ledger.Shelley.TxAuxData (Metadatum (..), ShelleyTxAuxData (..))
-
+import Cardano.Ledger.Shelley.TxAuxData (Metadatum (..), ShelleyTxAuxData (..))
 import qualified Data.Map.Strict as Map
-import           Data.Word (Word64)
-
-import           Test.Gen.Cardano.Api.Typed (genCostModel, genRational)
-
-import           Hedgehog (Gen, Range)
+import Data.Word (Word64)
+import Hedgehog (Gen, Range)
 import qualified Hedgehog.Gen as Gen
 import qualified Hedgehog.Internal.Range as Range
+import Test.Gen.Cardano.Api.Typed (genCostModel, genRational)
 
 genMetadata :: Ledger.Era era => Gen (ShelleyTxAuxData era)
 genMetadata = do
   numberOfIndices <- Gen.integral (Range.linear 1 15)
-  let indices = map (\i -> fromIntegral i :: Word64) [1..numberOfIndices]
+  let indices = map (\i -> fromIntegral i :: Word64) [1 .. numberOfIndices]
   mData <- Gen.list (Range.singleton numberOfIndices) genMetadatum
   return . ShelleyTxAuxData . Map.fromList $ zip indices mData
 
@@ -63,22 +61,24 @@ genPrice = do
 
 genPrices :: Gen Alonzo.Prices
 genPrices = do
-  prMem'   <- genPrice
+  prMem' <- genPrice
   prSteps' <- genPrice
 
-  return Alonzo.Prices
-    { Alonzo.prMem = prMem'
-    , Alonzo.prSteps = prSteps'
-    }
+  return
+    Alonzo.Prices
+      { Alonzo.prMem = prMem'
+      , Alonzo.prSteps = prSteps'
+      }
 
 genExUnits :: Gen Alonzo.ExUnits
 genExUnits = do
   exUnitsMem' <- Gen.integral (Range.linear 0 10)
   exUnitsSteps' <- Gen.integral (Range.linear 0 10)
-  return Alonzo.ExUnits
-    { Alonzo.exUnitsMem = exUnitsMem'
-    , Alonzo.exUnitsSteps = exUnitsSteps'
-    }
+  return
+    Alonzo.ExUnits
+      { Alonzo.exUnitsMem = exUnitsMem'
+      , Alonzo.exUnitsSteps = exUnitsSteps'
+      }
 
 genCostModels :: Gen Alonzo.CostModels
 genCostModels = do
@@ -101,13 +101,14 @@ genAlonzoGenesis = do
   collateralPercentage' <- Gen.integral (Range.linear 0 10)
   maxCollateralInputs' <- Gen.integral (Range.linear 0 10)
 
-  return Alonzo.AlonzoGenesis
-    { Alonzo.agCoinsPerUTxOWord = Ledger.CoinPerWord coinsPerUTxOWord
-    , Alonzo.agCostModels = mempty
-    , Alonzo.agPrices = prices'
-    , Alonzo.agMaxTxExUnits = maxTxExUnits'
-    , Alonzo.agMaxBlockExUnits = maxBlockExUnits'
-    , Alonzo.agMaxValSize = maxValSize'
-    , Alonzo.agCollateralPercentage = collateralPercentage'
-    , Alonzo.agMaxCollateralInputs = maxCollateralInputs'
-    }
+  return
+    Alonzo.AlonzoGenesis
+      { Alonzo.agCoinsPerUTxOWord = Ledger.CoinPerWord coinsPerUTxOWord
+      , Alonzo.agCostModels = mempty
+      , Alonzo.agPrices = prices'
+      , Alonzo.agMaxTxExUnits = maxTxExUnits'
+      , Alonzo.agMaxBlockExUnits = maxBlockExUnits'
+      , Alonzo.agMaxValSize = maxValSize'
+      , Alonzo.agCollateralPercentage = collateralPercentage'
+      , Alonzo.agMaxCollateralInputs = maxCollateralInputs'
+      }

cardano-api/gen/Test/Gen/Cardano/Api/Byron.hs

@@ -4,19 +4,17 @@
 
 module Test.Gen.Cardano.Api.Byron
   ( tests
-  ) where
-
-import           Cardano.Api hiding (txIns)
-import           Cardano.Api.Byron
-
-import           Data.Proxy
-
-import           Test.Gen.Cardano.Api.Typed
-
-import           Hedgehog
-import           Test.Hedgehog.Roundtrip.CBOR
-import           Test.Tasty
-import           Test.Tasty.Hedgehog
+  )
+where
+
+import Cardano.Api hiding (txIns)
+import Cardano.Api.Byron
+import Data.Proxy
+import Hedgehog
+import Test.Gen.Cardano.Api.Typed
+import Test.Hedgehog.Roundtrip.CBOR
+import Test.Tasty
+import Test.Tasty.Hedgehog
 
 prop_byron_roundtrip_txbody_CBOR :: Property
 prop_byron_roundtrip_txbody_CBOR = property $ do
@@ -35,9 +33,10 @@ prop_byron_roundtrip_Tx_Cddl = property $ do
   tripping x serializeByronTx deserialiseByronTxCddl
 
 tests :: TestTree
-tests = testGroup "Test.Gen.Cardano.Api.Byron"
-  [ testProperty "Byron roundtrip txbody CBOR"         prop_byron_roundtrip_txbody_CBOR
-  , testProperty "Byron roundtrip witness CBOR"        prop_byron_roundtrip_witness_CBOR
-  , testProperty "Byron roundtrip tx CBOR"             prop_byron_roundtrip_Tx_Cddl
-  ]
-
+tests =
+  testGroup
+    "Test.Gen.Cardano.Api.Byron"
+    [ testProperty "Byron roundtrip txbody CBOR" prop_byron_roundtrip_txbody_CBOR
+    , testProperty "Byron roundtrip witness CBOR" prop_byron_roundtrip_witness_CBOR
+    , testProperty "Byron roundtrip tx CBOR" prop_byron_roundtrip_Tx_Cddl
+    ]