Adding docker image

Reviewed-on: #4
Co-authored-by: Igor Ranieri <igor@elland.me>
Co-committed-by: Igor Ranieri <igor@elland.me>

.forgejo/workflows/test.yaml

@@ -0,0 +1,121 @@
+name: Haskell CI
+on:
+  pull_request:
+    branches:
+      - dev
+      - main
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: docker
+    container:
+      image: haskell:9.10
+    steps:
+      - name: Install Node.js (for actions)
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y nodejs
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Check versions
+        run: |
+          ghc --version
+          cabal --version
+          node --version
+      - name: Cache Cabal packages
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cabal/packages
+            ~/.cabal/store
+            dist-newstyle
+          key: ${{ runner.os }}-haskell-9.10-cabal-${{ hashFiles('**/*.cabal', '**/cabal.project') }}
+          restore-keys: |
+            ${{ runner.os }}-haskell-9.10-cabal-
+      - name: Update Cabal package index
+        run: cabal update
+      - name: Configure project
+        run: cabal configure --enable-tests --enable-benchmarks
+      - name: Build dependencies
+        run: cabal build --only-dependencies --enable-tests --enable-benchmarks
+      - name: Build project
+        run: cabal build --enable-tests --enable-benchmarks
+      - name: Run documentation build
+        run: cabal haddock
+
+  test:
+    runs-on: docker
+    container:
+      image: haskell:9.10
+    needs: build
+    steps:
+      - name: Install Node.js (for actions)
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y nodejs
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Cache Cabal packages
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cabal/packages
+            ~/.cabal/store
+            dist-newstyle
+          key: ${{ runner.os }}-haskell-9.10-cabal-${{ hashFiles('**/*.cabal', '**/cabal.project') }}
+          restore-keys: |
+            ${{ runner.os }}-haskell-9.10-cabal-
+      - name: Update Cabal package index
+        run: cabal update
+      - name: Configure project
+        run: cabal configure --enable-tests --enable-benchmarks
+      - name: Build dependencies
+        run: cabal build --only-dependencies --enable-tests --enable-benchmarks
+      - name: Build project
+        run: cabal build --enable-tests --enable-benchmarks
+      - name: Run tests
+        run: cabal test --test-show-details=direct
+
+  fourmolu:
+    runs-on: docker
+    container:
+      image: haskell:9.10
+    steps:
+      - name: Install Node.js (for actions)
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y nodejs
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Update Cabal package index
+        run: cabal update
+      - name: Install fourmolu
+        run: cabal install fourmolu-0.18.0.0
+      - name: Run fourmolu
+        run: |
+          find src test app -name "*.hs" -exec fourmolu --check-idempotence {} \; 2>/dev/null || true
+          find src test app -name "*.hs" -exec fourmolu --mode check {} \;
+
+  hlint:
+    runs-on: docker
+    container:
+      image: haskell:9.10
+    steps:
+      - name: Install Node.js (for actions)
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y nodejs
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Update Cabal package index
+        run: cabal update
+      - name: Install hlint
+        run: cabal install hlint
+      - name: Run hlint
+        run: |
+          if [ -d src ]; then hlint src/; fi
+          if [ -d test ]; then hlint test/; fi  
+          if [ -d app ]; then hlint app/; fi

Dockerfile

@@ -0,0 +1,30 @@
+FROM haskell:9.10
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Node.js (for GitHub Actions compatibility)
+RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
+    apt-get install -y nodejs && \
+    rm -rf /var/lib/apt/lists/*
+
+# Update cabal and install Haskell tools
+RUN cabal update && \
+    cabal install --install-method=copy --installdir=/usr/local/bin \
+    fourmolu \
+    hlint \
+    cabal-gild
+
+# Verify installations
+RUN ghc --version && \
+    cabal --version && \
+    node --version && \
+    fourmolu --version && \
+    hlint --version && \
+    cabal-gild --version
+
+# Set working directory
+WORKDIR /workspace

Makefile

@@ -0,0 +1,44 @@
+.PHONY: help
+help: ## Show this help
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: build
+build: ## Build the project
+	cabal build
+
+.PHONY: test
+test: ## Run tests
+	cabal test --test-show-details=direct
+
+.PHONY: clean
+clean: ## Clean build artifacts
+	cabal clean
+
+.PHONY: fourmolu
+fourmolu: ## Format Haskell code
+	find . -type f -name "*.hs" ! -path "./dist-newstyle/*" -exec fourmolu -i {} +
+
+.PHONY: fourmolu-check
+fourmolu-check: ## Check if code is formatted
+	find . -type f -name "*.hs" ! -path "./dist-newstyle/*" -exec fourmolu --mode check {} \;
+
+.PHONY: lint
+lint: ## Run hlint
+	hlint src test app
+
+.PHONY: cabal-gild
+cabal-gild: ## Format cabal file
+	cabal-gild --io=haddock2.cabal
+
+.PHONY: format
+format: fourmolu cabal-gild ## Run all formatters
+
+.PHONY: check
+check: fourmolu-check lint ## Run all checks (CI-style)
+
+.PHONY: ci
+ci: build test check ## Run full CI pipeline locally
+
+.PHONY: docs
+docs: ## Generate documentation
+	cabal haddock --haddock-hyperlink-source

haddock2.cabal

@@ -46,10 +46,10 @@ test-suite haddock2-test
   type: exitcode-stdio-1.0
   main-is: Spec.hs
   build-depends:
-    parsec ^>=3.1.18.0,
     base >=4.20.1.0,
     haddock2:{haddock2-lib},
     hspec ^>=2.11.0,
+    parsec ^>=3.1.18.0,
     text ^>=2.1.2,
 
   hs-source-dirs: test

src/Lexer.hs

@@ -4,7 +4,8 @@ module Lexer (
   Token (..),
   lexer,
   emphasis,
-) where
+)
+where
 
 import Control.Monad (mfilter, void)
 import Data.Functor (($>))
@@ -17,6 +18,7 @@ import Text.Parsec qualified as Parsec
 import Text.Parsec.Pos (updatePosChar)
 
 type Located a = (SourcePos, a)
+
 type LocatedToken = (SourcePos, Token)
 
 type Lexer = Parser [LocatedToken]
@@ -67,7 +69,7 @@ located :: Parser a -> Parser (SourcePos, a)
 located p = (,) <$> getPosition <*> p
 
 tokenise :: [Parser a] -> Parser [(SourcePos, a)]
-tokenise = sequence . map located
+tokenise = mapM located
 
 lexer :: String -> Either ParseError [LocatedToken]
 lexer = Parsec.runParser lexText initialParserState "input" . Text.pack
@@ -144,7 +146,7 @@ delimitedNoTrailing openP closeP openTok = asList <$> delimitedAsTuple (openTok
   asList (a, tok, _) = [a, tok]
 
 delimitedSymmetric :: Parser a -> Token -> Token -> Parser [LocatedToken]
-delimitedSymmetric s t1 t2 = delimited s s t1 t2
+delimitedSymmetric s = delimited s s
 
 eol :: Parser ()
 eol = void "\n" <|> void "\r\n" <|> Parsec.eof
@@ -173,7 +175,6 @@ anchor = do
   x <- located $ between "#" "#" (Anchor <$> anyUntil "#")
   pure [x]
 
-
 moduleNames :: Parser Text
 moduleNames = intercalate "." . fmap Text.pack <$> upperId `sepBy1` char '.'
 
@@ -302,6 +303,7 @@ scan ::
   Parser Text
 scan f initState = do
   parserState@State{stateInput = input, statePos = pos} <- Parsec.getParserState
+
   (remaining, finalPos, ct) <- go input initState pos 0
   let newState = parserState{stateInput = remaining, statePos = finalPos}
   Parsec.setParserState newState $> Text.take ct input

src/Parser/Util.hs

@@ -13,7 +13,9 @@ import Text.Parsec.Pos (updatePosChar)
 Return everything consumed except for the end pattern itself.
 -}
 takeUntil :: Text -> Parser Text
-takeUntil end_ = Text.dropEnd (Text.length end_) <$> requireEnd (scan p (False, end)) >>= gotSome
+takeUntil end_ =
+  requireEnd (scan p (False, end))
+    >>= gotSome . Text.dropEnd (Text.length end_)
  where
   end = Text.unpack end_
 

src/Types.hs

@@ -9,6 +9,8 @@ module Types (
 )
 where
 
+import Data.Foldable (fold)
+
 newtype Document = Document
   { meta :: Meta
   }
@@ -28,6 +30,7 @@ data Since = Since
 
 -- Could have a better type?
 type Version = [Int]
+
 type Package = String
 
 data DocMarkup mod id
@@ -136,7 +139,7 @@ instance Semigroup (DocMarkup mod id) where
 
 instance Monoid (DocMarkup mod id) where
   mempty = DocEmpty
-  mconcat = foldr (<>) mempty
+  mconcat = fold
 
 data ModuleLink id = ModuleLink
   { name :: String

test/Spec.hs

@@ -1,17 +1,15 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
-import Test.Hspec
+import Data.String (IsString (..))
-
+import Data.Text (Text)
+import GHC.Stack
 import Identifier (Identifier)
 import Lexer
 import Parser
-import Types
+import Test.Hspec
-
-import Data.String (IsString (..))
-import Data.Text (Text)
 import Text.Parsec.Pos
-import GHC.Stack
+import Types
 
 main :: IO ()
 main = hspec $ do
@@ -34,9 +32,9 @@ main = hspec $ do
 
   describe "Parser" do
     it "Bold" do
-            "__bold__" `shouldParseTo` (DocBold (DocString "bold"))
+      "__bold__" `shouldParseTo` DocBold (DocString "bold")
     it "Emphasis" do
-            "/emphasis/" `shouldParseTo` (DocEmphasis (DocString "emphasis"))
+      "/emphasis/" `shouldParseTo` DocEmphasis (DocString "emphasis")
 
 ------------
 -- Tests
@@ -57,6 +55,7 @@ modules = do
     `shouldLexTo` [ (1, 2, Module "OtherModule.Name")
                   , (1, 18, Anchor "myAnchor")
                   ]
+
 link :: Expectation
 link =
   "[link to](http://some.website)"