Fix "variable is not used" error

.gitea/workflows/build.yml

@@ -2,51 +2,67 @@ name: Build
 
 on:
   push:
-    branches:
-      - '**'
   pull_request:
     branches: [master]
 
 jobs:
   audit:
-    runs-on: haskell
+    runs-on: alpine
     steps:
       - name: Set up environment
+        shell: ash {0}
         run: |
-          apt-get update -y
+          apk add --no-cache git bash curl build-base readline-dev openssl-dev zlib-dev libpq-dev gmp-dev
-          apt-get upgrade -y
+      - name: Prepare system
-          apt-get install -y nodejs pkg-config
+        run: |
+          curl --create-dirs --output-dir \
+            ~/.ghcup/bin https://downloads.haskell.org/~ghcup/0.1.19.5/x86_64-linux-ghcup-0.1.19.5 -o ghcup
+          chmod +x ~/.ghcup/bin/ghcup
+          ~/.ghcup/bin/ghcup install ghc 9.4.8
+          ~/.ghcup/bin/ghcup install cabal 3.6.2.0
       - uses: actions/checkout@v4
       - name: Install dependencies
         run: |
-          cabal update
+          ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal update
-          cabal install hlint "--constraint=hlint ==3.8"
+          ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal install hlint --constraint="hlint ==3.6.1"
-      - run: cabal exec hlint -- src tests
+      - run: ~/.cabal/bin/hlint -- src tests
 
   test:
-    runs-on: haskell
+    runs-on: alpine
     steps:
       - name: Set up environment
+        shell: ash {0}
         run: |
-          apt-get update -y
+          apk add --no-cache git bash curl build-base readline-dev openssl-dev zlib-dev libpq-dev gmp-dev
-          apt-get upgrade -y
+      - name: Prepare system
-          apt-get install -y nodejs pkg-config
+        run: |
+          curl --create-dirs --output-dir \
+            ~/.ghcup/bin https://downloads.haskell.org/~ghcup/0.1.19.5/x86_64-linux-ghcup-0.1.19.5 -o ghcup
+          chmod +x ~/.ghcup/bin/ghcup
+          ~/.ghcup/bin/ghcup install ghc 9.4.8
+          ~/.ghcup/bin/ghcup install cabal 3.6.2.0
       - uses: actions/checkout@v4
       - name: Install dependencies
-        run: cabal update
+        run: |
-      - name: Prepare system
+          ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal update
-        run: cabal build graphql-test
+          ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal build graphql-test
-      - run: cabal test --test-show-details=streaming
+      - run: ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal test --test-show-details=direct
 
   doc:
-    runs-on: haskell
+    runs-on: alpine
     steps:
       - name: Set up environment
+        shell: ash {0}
         run: |
-          apt-get update -y
+          apk add --no-cache git bash curl build-base readline-dev openssl-dev zlib-dev libpq-dev gmp-dev
-          apt-get upgrade -y
+      - name: Prepare system
-          apt-get install -y nodejs pkg-config
+        run: |
+          curl --create-dirs --output-dir \
+            ~/.ghcup/bin https://downloads.haskell.org/~ghcup/0.1.19.5/x86_64-linux-ghcup-0.1.19.5 -o ghcup
+          chmod +x ~/.ghcup/bin/ghcup
+          ~/.ghcup/bin/ghcup install ghc 9.4.8
+          ~/.ghcup/bin/ghcup install cabal 3.6.2.0
       - uses: actions/checkout@v4
       - name: Install dependencies
-        run: cabal update
+        run: ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal update
-      - run: cabal haddock --enable-documentation
+      - run: ~/.ghcup/bin/ghcup run --ghc 9.4.8 --cabal 3.6.2.0 -- cabal haddock --enable-documentation

.gitea/workflows/release.yml

@@ -1,23 +0,0 @@
-name: Release
-
-on:
-  push:
-    tags:
-      - '**'
-
-jobs:
-  release:
-    runs-on: haskell
-    steps:
-      - name: Set up environment
-        run: |
-          apt-get update -y
-          apt-get upgrade -y
-          apt-get install -y nodejs pkg-config
-      - uses: actions/checkout@v4
-      - name: Upload a candidate
-        env:
-          HACKAGE_PASSWORD: ${{ secrets.HACKAGE_PASSWORD }}
-        run: |
-          cabal sdist
-          cabal upload --username belka --password ${HACKAGE_PASSWORD}

CHANGELOG.md

@@ -6,21 +6,11 @@ The format is based on
 and this project adheres to
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
-## [1.3.0.0] - 2024-05-01
+## [Unreleased]
-### Changed
-- Remove deprecated `runCollectErrs`, `Resolution`, `CollectErrsT` from the
-  `Error` module.
-
-## [1.2.0.3] - 2024-01-09
-### Fixed
-- Fix corrupted source distribution.
-
-## [1.2.0.2] - 2024-01-09
 ### Fixed
 - `gql` removes not only leading `\n` but also `\r`.
 - Fix non nullable type string representation in executor error messages.
 - Fix input objects not being coerced to lists.
-- Fix used variables are not found in the properties of input objects.
 
 ## [1.2.0.1] - 2023-04-25
 ### Fixed
@@ -524,9 +514,7 @@ and this project adheres to
 ### Added
 - Data types for the GraphQL language.
 
-[1.3.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.3...v1.3.0.0
+[Unreleased]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.1...master
-[1.2.0.3]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.2...v1.2.0.3
-[1.2.0.2]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.1...v1.2.0.2
 [1.2.0.1]: https://git.caraus.tech/OSS/graphql/compare/v1.2.0.0...v1.2.0.1
 [1.2.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.1.0.0...v1.2.0.0
 [1.1.0.0]: https://git.caraus.tech/OSS/graphql/compare/v1.0.3.0...v1.1.0.0

graphql.cabal

@@ -1,7 +1,7 @@
 cabal-version: 2.4
 
 name:           graphql
-version:        1.3.0.0
+version:        1.2.0.1
 synopsis:       Haskell GraphQL implementation
 description:    Haskell <https://spec.graphql.org/June2018/ GraphQL> implementation.
 category:       Language
@@ -11,7 +11,7 @@ author:         Danny Navarro <j@dannynavarro.net>,
                 Matthías Páll Gissurarson <mpg@mpg.is>,
                 Sólrún Halla Einarsdóttir <she@mpg.is>
 maintainer:     belka@caraus.de
-copyright:      (c) 2019-2024 Eugen Wissner,
+copyright:      (c) 2019-2023 Eugen Wissner,
                 (c) 2015-2017 J. Daniel Navarro
 license:        MPL-2.0 AND BSD-3-Clause
 license-files:  LICENSE,
@@ -60,7 +60,7 @@ library
   build-depends:
     base >= 4.7 && < 5,
     conduit ^>= 1.3.4,
-    containers >= 0.6 && < 0.8,
+    containers ^>= 0.6.2,
     exceptions ^>= 0.10.4,
     megaparsec >= 9.0 && < 10,
     parser-combinators >= 1.3 && < 2,
@@ -93,7 +93,7 @@ test-suite graphql-test
   ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
 
   build-depends:
-    QuickCheck >= 2.14 && < 2.16,
+    QuickCheck ^>= 2.14.1,
     base,
     conduit,
     exceptions,

src/Language/GraphQL/Error.hs

@@ -8,22 +8,28 @@
 
 -- | Error handling.
 module Language.GraphQL.Error
-    ( Error(..)
+    ( CollectErrsT
+    , Error(..)
     , Path(..)
+    , Resolution(..)
     , ResolverException(..)
     , Response(..)
     , ResponseEventStream
     , parseError
+    , runCollectErrs
     ) where
 
 import Conduit
 import Control.Exception (Exception(..))
+import Control.Monad.Trans.State (StateT, runStateT)
+import Data.HashMap.Strict (HashMap)
 import Data.Sequence (Seq(..), (|>))
 import qualified Data.Sequence as Seq
 import Data.Text (Text)
 import qualified Data.Text as Text
-import Language.GraphQL.AST (Location(..))
+import Language.GraphQL.AST (Location(..), Name)
 import Language.GraphQL.Execute.Coerce
+import qualified Language.GraphQL.Type.Schema as Schema
 import Prelude hiding (null)
 import Text.Megaparsec
     ( ParseErrorBundle(..)
@@ -91,3 +97,28 @@ instance Show ResolverException where
     show (ResolverException e) = show e
 
 instance Exception ResolverException
+
+-- * Deprecated
+
+{-# DEPRECATED runCollectErrs "runCollectErrs was part of the old executor and isn't used anymore" #-}
+-- | Runs the given query computation, but collects the errors into an error
+-- list, which is then sent back with the data.
+runCollectErrs :: (Monad m, Serialize a)
+    => HashMap Name (Schema.Type m)
+    -> CollectErrsT m a
+    -> m (Response a)
+runCollectErrs types' res = do
+    (dat, Resolution{..}) <- runStateT res
+        $ Resolution{ errors = Seq.empty, types = types' }
+    pure $ Response dat errors
+
+{-# DEPRECATED Resolution "Resolution was part of the old executor and isn't used anymore" #-}
+-- | Executor context.
+data Resolution m = Resolution
+    { errors :: Seq Error
+    , types :: HashMap Name (Schema.Type m)
+    }
+
+{-# DEPRECATED CollectErrsT "CollectErrsT was part of the old executor and isn't used anymore" #-}
+-- | A wrapper to pass error messages around.
+type CollectErrsT m = StateT (Resolution m) m

src/Language/GraphQL/Validate/Rules.hs

@@ -2,13 +2,11 @@
    v. 2.0. If a copy of the MPL was not distributed with this file, You can
    obtain one at https://mozilla.org/MPL/2.0/. -}
 
-{-# LANGUAGE DataKinds #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE ViewPatterns #-}
 
 -- | This module contains default rules defined in the GraphQL specification.
@@ -63,7 +61,6 @@ import Data.Sequence (Seq(..), (|>))
 import qualified Data.Sequence as Seq
 import Data.Text (Text)
 import qualified Data.Text as Text
-import GHC.Records (HasField(..))
 import qualified Language.GraphQL.AST.Document as Full
 import qualified Language.GraphQL.Type.Definition as Definition
 import qualified Language.GraphQL.Type.Internal as Type
@@ -621,10 +618,6 @@ noUndefinedVariablesRule =
         , "\"."
         ]
 
--- Used to find the difference between defined and used variables. The first
--- argument are variables defined in the operation, the second argument are
--- variables used in the query. It should return the difference between these
--- 2 sets.
 type UsageDifference
     = HashMap Full.Name [Full.Location]
     -> HashMap Full.Name [Full.Location]
@@ -671,16 +664,25 @@ variableUsageDifference difference errorMessage = OperationDefinitionRule $ \cas
         = filterSelections' selections
         >>= lift . mapReaderT (<> mapDirectives directives') . pure
     findDirectiveVariables (Full.Directive _ arguments _) = mapArguments arguments
+
     mapArguments = Seq.fromList . (>>= findArgumentVariables)
     mapDirectives = foldMap findDirectiveVariables
 
-    findArgumentVariables (Full.Argument _ value _) = findNodeVariables value
+    findArgumentVariables (Full.Argument _ Full.Node{node = value, ..} _) =
-    findNodeVariables Full.Node{ node = value, ..} = findValueVariables location value
+        findValueVariables location value
 
     findValueVariables location (Full.Variable value') = [(value', [location])]
-    findValueVariables _ (Full.List values) = values >>= findNodeVariables
+    findValueVariables location (Full.List values) =
-    findValueVariables _ (Full.Object fields) = fields
+        values
-        >>= findNodeVariables . getField @"value"
+            >>= (\(Full.Node{node = value}) -> findValueVariables location value)
+    findValueVariables _ (Full.Object fields) =
+        fields
+            >>= ( \( Full.ObjectField
+                        { location = location
+                        , value = Full.Node{node = value}
+                        }
+                    ) -> findValueVariables location value
+                )
     findValueVariables _ _ = []
     makeError operationName (variableName, locations') = Error
         { message = errorMessage operationName variableName

tests/Language/GraphQL/AST/Arbitrary.hs

@@ -7,7 +7,6 @@ import Test.QuickCheck.Arbitrary (Arbitrary (arbitrary))
 import Test.QuickCheck (oneof, elements, listOf, resize, NonEmptyList (..))
 import Test.QuickCheck.Gen (Gen (..))
 import Data.Text (Text, pack)
-import Data.Functor ((<&>))
 
 newtype AnyPrintableChar = AnyPrintableChar { getAnyPrintableChar :: Char } deriving (Eq, Show)
 
@@ -60,36 +59,34 @@ instance Arbitrary a => Arbitrary (AnyObjectField a) where
         location' <- getAnyLocation <$> arbitrary
         pure $ AnyObjectField $ Doc.ObjectField name' value' location'
 
-newtype AnyValue = AnyValue { getAnyValue :: Doc.Value }
+newtype AnyValue = AnyValue { getAnyValue :: Doc.Value } deriving (Eq, Show)
-    deriving (Eq, Show)
 
-instance Arbitrary AnyValue
+instance Arbitrary AnyValue where
-  where
+    arbitrary = AnyValue <$> oneof
-    arbitrary =
-        let variableGen :: Gen Doc.Value
-            variableGen = Doc.Variable . getAnyName <$> arbitrary
-            listGen :: Gen [Doc.Node Doc.Value]
-            listGen = (resize 5 . listOf) nodeGen
-            nodeGen :: Gen (Doc.Node Doc.Value)
-            nodeGen = fmap getAnyNode arbitrary <&> fmap getAnyValue
-            objectGen :: Gen [Doc.ObjectField Doc.Value]
-            objectGen = resize 1
-                $ fmap getNonEmpty arbitrary
-                <&> map (fmap getAnyValue . getAnyObjectField)
-         in AnyValue <$> oneof
         [ variableGen
         , Doc.Int <$> arbitrary
         , Doc.Float <$> arbitrary
-            , Doc.String . getAnyPrintableText <$> arbitrary
+        , Doc.String <$> (getAnyPrintableText <$> arbitrary)
         , Doc.Boolean <$> arbitrary
         , MkGen $ \_ _ -> Doc.Null
-            , Doc.Enum . getAnyName <$> arbitrary
+        , Doc.Enum <$> (getAnyName <$> arbitrary)
         , Doc.List <$> listGen
         , Doc.Object <$> objectGen
         ]
+            where
+                variableGen :: Gen Doc.Value
+                variableGen = Doc.Variable <$> (getAnyName <$> arbitrary)
+                listGen :: Gen [Doc.Node Doc.Value]
+                listGen = (resize 5 . listOf) nodeGen
+                nodeGen = do
+                    node' <- getAnyNode <$> (arbitrary :: Gen (AnyNode AnyValue))
+                    pure (getAnyValue <$> node')
+                objectGen :: Gen [Doc.ObjectField Doc.Value]
+                objectGen = resize 1 $ do
+                    list <- getNonEmpty <$> (arbitrary :: Gen (NonEmptyList (AnyObjectField AnyValue)))
+                    pure $ map (fmap getAnyValue . getAnyObjectField) list
 
-newtype AnyArgument a = AnyArgument { getAnyArgument :: Doc.Argument }
+newtype AnyArgument a = AnyArgument { getAnyArgument :: Doc.Argument } deriving (Eq, Show)
-    deriving (Eq, Show)
 
 instance Arbitrary a => Arbitrary (AnyArgument a) where
     arbitrary = do

tests/Language/GraphQL/Validate/RulesSpec.hs

@@ -29,7 +29,6 @@ queryType = ObjectType "Query" Nothing [] $ HashMap.fromList
     [ ("dog", dogResolver)
     , ("cat", catResolver)
     , ("findDog", findDogResolver)
-    , ("findCats", findCatsResolver)
     ]
   where
     dogField = Field Nothing (Out.NamedObjectType dogType) mempty
@@ -40,11 +39,6 @@ queryType = ObjectType "Query" Nothing [] $ HashMap.fromList
     findDogResolver = ValueResolver findDogField $ pure Null
     catField = Field Nothing (Out.NamedObjectType catType) mempty
     catResolver = ValueResolver catField $ pure Null
-    findCatsArguments = HashMap.singleton "commands"
-        $ In.Argument Nothing (In.NonNullListType $ In.NonNullEnumType catCommandType)
-        $ Just $ List []
-    findCatsField = Field Nothing (Out.NonNullListType $ Out.NonNullObjectType catType) findCatsArguments
-    findCatsResolver = ValueResolver findCatsField $ pure $ List []
 
 catCommandType :: EnumType
 catCommandType = EnumType "CatCommand" Nothing $ HashMap.fromList
@@ -544,7 +538,7 @@ spec =
                         }
                  in validate queryString `shouldContain` [expected]
 
-        context "noUndefinedVariablesRule" $ do
+        context "noUndefinedVariablesRule" $
             it "rejects undefined variables" $
                 let queryString = [gql|
                   query variableIsNotDefinedUsedInSingleFragment {
@@ -566,35 +560,7 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
-            it "gets variable location inside an input object" $
+        context "noUnusedVariablesRule" $
-                let queryString = [gql|
-                  query {
-                    findDog (complex: { name: $name }) {
-                      name
-                    }
-                  }
-                |]
-                    expected = Error
-                        { message = "Variable \"$name\" is not defined."
-                        , locations = [AST.Location 2 29]
-                        }
-                 in validate queryString `shouldBe` [expected]
-
-            it "gets variable location inside an array" $
-                let queryString = [gql|
-                  query {
-                    findCats (commands: [JUMP, $command]) {
-                      name
-                    }
-                  }
-                |]
-                    expected = Error
-                        { message = "Variable \"$command\" is not defined."
-                        , locations = [AST.Location 2 30]
-                        }
-                 in validate queryString `shouldBe` [expected]
-
-        context "noUnusedVariablesRule" $ do
             it "rejects unused variables" $
                 let queryString = [gql|
                   query variableUnused($atOtherHomes: Boolean) {
@@ -611,16 +577,6 @@ spec =
                         }
                  in validate queryString `shouldBe` [expected]
 
-            it "detects variables in properties of input objects" $
-                let queryString = [gql|
-                  query withVar ($name: String!) {
-                    findDog (complex: { name: $name }) {
-                      name
-                    }
-                  }
-                |]
-                 in validate queryString `shouldBe` []
-
         context "uniqueInputFieldNamesRule" $
             it "rejects duplicate fields in input objects" $
                 let queryString = [gql|