Use 'prettyprinter' library

.github/workflows/ci.yml

@@ -0,0 +1,77 @@
+name: CI
+
+# Trigger the workflow on push or pull request, but only for the master branch
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  cabal:
+    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+        cabal: ["latest"]
+        ghc:
+          - "8.6.5"
+          - "8.8.3"
+          - "8.10.1"
+
+    steps:
+    - uses: actions/checkout@v2
+      #if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
+
+    - uses: actions/[email protected]
+      id: setup-haskell-cabal
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        cabal-version: ${{ matrix.cabal }}
+
+    - uses: actions/cache@v1
+      name: Cache cabal-store
+      with:
+        path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+        key: ${{ runner.os }}-${{ matrix.ghc }}-cabal
+
+    - name: Build
+      run: |
+        cabal update
+        cabal build all --enable-tests --enable-benchmarks --write-ghc-environment-files=always
+
+    - name: Test
+      run: |
+        cabal test all --enable-tests
+
+  stack:
+    name: stack / ghc ${{ matrix.ghc }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        stack: ["latest"]
+
+    steps:
+    - uses: actions/checkout@v2
+      #if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
+
+    - uses: actions/[email protected]
+      name: Setup Haskell Stack
+      with:
+        stack-version: ${{ matrix.stack }}
+
+    - uses: actions/cache@v1
+      name: Cache ~/.stack
+      with:
+        path: ~/.stack
+        key: ${{ runner.os }}-${{ matrix.ghc }}-stack
+
+    - name: Build
+      run: |
+        stack build --test --bench --no-run-tests --no-run-benchmarks --flag pretty-simple:buildexe --flag pretty-simple:buildexample
+
+    - name: Test
+      run: |
+        stack test
+

README.md

@@ -2,7 +2,7 @@
 Text.Pretty.Simple
 ==================
 
-[![Build Status](https://secure.travis-ci.org/cdepillabout/pretty-simple.svg)](http://travis-ci.org/cdepillabout/pretty-simple)
+[![Build Status](https://github.com/cdepillabout/pretty-simple/workflows/CI/badge.svg)](https://github.com/cdepillabout/pretty-simple/actions)
 [![Hackage](https://img.shields.io/hackage/v/pretty-simple.svg)](https://hackage.haskell.org/package/pretty-simple)
 [![Stackage LTS](http://stackage.org/package/pretty-simple/badge/lts)](http://stackage.org/lts/package/pretty-simple)
 [![Stackage Nightly](http://stackage.org/package/pretty-simple/badge/nightly)](http://stackage.org/nightly/package/pretty-simple)

pretty-simple.cabal

@@ -36,13 +36,12 @@ library
                      , Text.Pretty.Simple.Internal.Color
                      , Text.Pretty.Simple.Internal.Expr
                      , Text.Pretty.Simple.Internal.ExprParser
-                     , Text.Pretty.Simple.Internal.ExprToOutput
-                     , Text.Pretty.Simple.Internal.Output
                      , Text.Pretty.Simple.Internal.OutputPrinter
   build-depends:       base >= 4.8 && < 5
-                     , ansi-terminal >= 0.6
                      , containers
                      , mtl >= 2.2
+                     , prettyprinter >= 1.7.0
+                     , prettyprinter-ansi-terminal >= 1.1.2
                      , text >= 1.2
                      , transformers >= 0.4
   default-language:    Haskell2010