Create the project

.github/workflows/ci.yml

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+name: CI
+
+# Trigger the workflow on push or pull request, but only for the master branch
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  build:
+    name: ghc ${{ matrix.ghc }}
+    runs-on: ubuntu-16.04
+    strategy:
+      matrix:
+        cabal: ["2.4"]
+        ghc:
+          - "8.8.3"
+
+    steps:
+    - uses: actions/checkout@v2
+      if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
+
+    - uses: actions/setup-haskell@v1
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        cabal-version: ${{ matrix.cabal }}
+
+    - uses: actions/cache@v1
+      name: Cache ~/.cabal/store
+      with:
+        path: ~/.cabal/store
+        key: ${{ runner.os }}-${{ matrix.ghc }}-cabal
+
+    - name: Build
+      run: |
+        cabal v2-update
+        cabal v2-build --enable-tests --enable-benchmarks
+
+    - name: Test
+      run: |
+        cabal v2-test --enable-tests

.gitignore

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+### Haskell
+dist
+dist-*
+cabal-dev
+*.o
+*.hi
+*.chi
+*.chs.h
+*.dyn_o
+*.dyn_hi
+*.prof
+*.aux
+*.hp
+*.eventlog
+.virtualenv
+.hsenv
+.hpc
+.cabal-sandbox/
+cabal.sandbox.config
+cabal.config
+cabal.project.local
+.ghc.environment.*
+.HTF/
+# Stack
+.stack-work/
+stack.yaml.lock
+
+### IDE/support
+# Vim
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+*~
+tags
+
+# IntellijIDEA
+.idea/
+.ideaHaskellLib/
+*.iml
+
+# Atom
+.haskell-ghc-mod.json
+
+# VS
+.vscode/
+
+# Emacs
+*#
+.dir-locals.el
+TAGS
+
+# other
+.DS_Store

README.md

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+# haskell-repos
+
+[![GitHub CI](https://github.com/ad-si/haskell-repos/workflows/CI/badge.svg)](https://github.com/ad-si/haskell-repos/actions)
+[![Hackage](https://img.shields.io/hackage/v/haskell-repos.svg?logo=haskell)](https://hackage.haskell.org/package/haskell-repos)
+[![Stackage Lts](http://stackage.org/package/haskell-repos/badge/lts)](http://stackage.org/lts/package/haskell-repos)
+[![Stackage Nightly](http://stackage.org/package/haskell-repos/badge/nightly)](http://stackage.org/nightly/package/haskell-repos)
+
+See README for more info

app/Main.hs

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+module Main (main) where
+
+import HaskellRepos (someFunc)
+
+
+main :: IO ()
+main = someFunc

haskell-repos.cabal

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+cabal-version:       2.4
+name:                haskell-repos
+version:             0.0.0.0
+synopsis:            See README for more info
+description:         See README for more info
+homepage:            https://github.com/ad-si/haskell-repos
+bug-reports:         https://github.com/ad-si/haskell-repos/issues
+license:             NONE
+author:              Adrian Sieber
+maintainer:          Adrian Sieber <[email protected]>
+copyright:           2020 Adrian Sieber
+category:            Utility
+build-type:          Simple
+extra-doc-files:     README.md
+                     CHANGELOG.md
+tested-with:         GHC == 8.8.3
+
+source-repository head
+  type:                git
+  location:            https://github.com/ad-si/haskell-repos.git
+
+common common-options
+  build-depends:       base ^>= 4.13.0.0
+                     , protolude
+
+  mixins:              base hiding (Prelude)
+                     , protolude (Protolude as Prelude)
+
+  ghc-options:         -Wall
+                       -Wcompat
+                       -Widentities
+                       -Wincomplete-uni-patterns
+                       -Wincomplete-record-updates
+  if impl(ghc >= 8.0)
+    ghc-options:       -Wredundant-constraints
+  if impl(ghc >= 8.2)
+    ghc-options:       -fhide-source-paths
+  if impl(ghc >= 8.4)
+    ghc-options:       -Wmissing-export-lists
+                       -Wpartial-fields
+  if impl(ghc >= 8.8)
+    ghc-options:       -Wmissing-deriving-strategies
+
+  default-language:    Haskell2010
+  default-extensions:  LambdaCase
+                       OverloadedStrings
+                       RecordWildCards
+                       ScopedTypeVariables
+                       StandaloneDeriving
+                       TupleSections
+
+library
+  import:              common-options
+  hs-source-dirs:      src
+  exposed-modules:     HaskellRepos
+
+executable haskell-repos
+  import:              common-options
+  hs-source-dirs:      app
+  main-is:             Main.hs
+  build-depends:       haskell-repos
+  ghc-options:         -threaded
+                       -rtsopts
+                       -with-rtsopts=-N
+
+test-suite haskell-repos-test
+  import:              common-options
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       haskell-repos
+  ghc-options:         -threaded
+                       -rtsopts
+                       -with-rtsopts=-N

src/HaskellRepos.hs

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+{- |
+Copyright: (c) 2020 Adrian Sieber
+SPDX-License-Identifier: NONE
+Maintainer: Adrian Sieber <[email protected]>
+
+See README for more info
+-}
+
+module HaskellRepos
+       ( someFunc
+       ) where
+
+
+someFunc :: IO ()
+someFunc = putStrLn ("someFunc" :: String)

stack.yaml

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+resolver: lts-15.5

test/Spec.hs

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+module Main (main) where
+
+
+main :: IO ()
+main = putStrLn ("Test suite is not implemented" :: String)