Add Actions CI

Author: sorki

.github/workflows/ci.yaml

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+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Native dependencies
+        run: sudo apt install libgmp-dev libgl1-mesa-dev libxcursor-dev libxi-dev libxinerama-dev libxrandr-dev libxxf86vm-dev
+      - uses: "actions/checkout@v3"
+      - id: setup-haskell-cabal
+        uses: "haskell/actions/setup@v2"
+        with:
+          cabal-version: "${{ matrix.cabal }}"
+          enable-stack: false
+          ghc-version: "${{ matrix.ghc }}"
+      - name: Update Hackage repository
+        run: cabal update
+      - name: cabal.project.local.ci
+        run: |
+          if [ -e cabal.project.local.ci ]; then
+            cp cabal.project.local.ci cabal.project.local
+          fi
+      - name: freeze
+        run: cabal freeze
+      - uses: "actions/cache@v3"
+        with:
+          key: "${{ runner.os }}-${{ matrix.ghc }}-cabal-${{ hashFiles('cabal.project.freeze') }}"
+          path: |
+            ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+            dist-newstyle
+      - name: Install dependencies
+        run: cabal build all --enable-tests --enable-benchmarks --only-dependencies
+      - name: build all
+        run: cabal build all --enable-tests --enable-benchmarks
+      - name: test all
+        run: cabal test all --enable-tests
+      - name: haddock all
+        run: cabal haddock all 
+    strategy:
+      matrix:
+        cabal:
+          - '3.4'
+        ghc:
+          - '9.0.2'
+          - '8.10.7'
+name: Haskell CI
+on:
+  - push
+  - pull_request

ci.dhall

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+let haskellCi =
+      https://raw.githubusercontent.com/sorki/github-actions-dhall/pending/haskell-ci.dhall
+
+in    haskellCi.generalCi
+        (   [ haskellCi.BuildStep.Name
+                { name = "Native dependencies"
+                , run =
+                    "sudo apt install libgmp-dev libgl1-mesa-dev libxcursor-dev libxi-dev libxinerama-dev libxrandr-dev libxxf86vm-dev"
+                }
+            ]
+          # haskellCi.matrixSteps
+        )
+        ( Some
+            { ghc = [ haskellCi.GHC.GHC902, haskellCi.GHC.GHC8107 ]
+            , cabal = [ haskellCi.Cabal.Cabal34 ]
+            }
+        )
+    : haskellCi.CI.Type

ci.sh

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+#!/usr/bin/env bash
+# Script by @fisx
+
+set -eo pipefail
+cd "$( dirname "${BASH_SOURCE[0]}" )"
+
+echo "regenerating .github/workflows/ci.yaml..."
+
+mkdir -p .github/workflows
+
+# based on https://github.com/vmchale/github-actions-dhall
+which dhall-to-yaml || cabal install dhall-yaml
+dhall-to-yaml --file ci.dhall > .github/workflows/ci.yaml