Remove custom setup to enable cross-compilation

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           # dependencies, so it is probably okay we aren't testing on OSX.
           # - macOS-latest
         cabal:
-          - "latest"
+          - "3.12.1.0"
         ghc:
           - "8.0.2"
           - "8.2.2"
@@ -37,6 +37,10 @@ jobs:
           - "8.10.7"
           - "9.0.2"
           - "9.2.4"
+          - "9.4.8"
+          - "9.6.6"
+          - "9.8.4"
+          - "9.10.1"
 
     steps:
     - uses: actions/checkout@v2
@@ -73,9 +77,14 @@ jobs:
         rm ./cabal.project
         cabal build package:pretty-simple --enable-tests --enable-benchmarks --write-ghc-environment-files=always --flags="buildexample"
 
+    - name: Install doctest
+      run: |
+        cabal install --ignore-project doctest --flag cabal-doctest
+        echo "$HOME/.cabal/bin" >> $GITHUB_PATH
+
     - name: Test
       run: |
-        cabal test package:pretty-simple --enable-tests
+        cabal doctest
 
   stack:
     name: stack / ubuntu-latest
@@ -104,10 +113,6 @@ jobs:
       run: |
         stack build --test --bench --no-run-tests --no-run-benchmarks --flag pretty-simple:buildexample
 
-    - name: Test
-      run: |
-        stack test
-
   nix-build-web:
     name: Nix build GHCJS web
     runs-on: ubuntu-latest

README.md

@@ -215,6 +215,14 @@ Feel free to open an
 [PR](https://github.com/cdepillabout/pretty-simple/pulls) for any
 bugs/problems/suggestions/improvements.
 
+### Testing
+
+To run the test suite locally, one must install the executables `doctest` and
+`cabal-doctest`, e.g. with
+`cabal install --ignore-project doctest --flag cabal-doctest`.
+
+Then run the command `cabal doctest`.
+
 ## Maintainers
 
 - [@cdepillabout](https://github.com/cdepillabout)

pretty-simple.cabal

@@ -9,17 +9,12 @@ author:              Dennis Gosnell
 maintainer:          [email protected]
 copyright:           2017-2019 Dennis Gosnell
 category:            Text
-build-type:          Custom
+build-type:          Simple
 extra-source-files:  CHANGELOG.md
                    , README.md
                    , img/pretty-simple-example-screenshot.png
 cabal-version:       >=1.10
 
-custom-setup
-  setup-depends:     base
-                   , Cabal >= 1.24
-                   , cabal-doctest >=1.0.2
-
 flag buildexe
   description: Build an small command line program that pretty-print anything from stdin.
   default:     True
@@ -96,18 +91,6 @@ executable pretty-simple-json-example
   else
     buildable:       False
 
-test-suite pretty-simple-doctest
-  type:                exitcode-stdio-1.0
-  main-is:             DocTest.hs
-  hs-source-dirs:      test
-  build-depends:       base
-                     , doctest >= 0.13
-                     , Glob
-                     , QuickCheck
-                     , template-haskell
-  default-language:    Haskell2010
-  ghc-options:         -Wall -threaded -rtsopts -with-rtsopts=-N
-
 benchmark pretty-simple-bench
   type:                exitcode-stdio-1.0
   main-is:             Bench.hs