From c85f1d737adfcb0a0c726e38edf548368eea9627 Mon Sep 17 00:00:00 2001
From: Tim McGilchrist <timmcgil@gmail.com>
Date: Tue, 14 Nov 2017 10:58:33 +1100
Subject: [PATCH] Rework travis build configuration.

---
 .travis.yml | 72 +++++++++++++++++++++++++++++------------------------
 1 file changed, 39 insertions(+), 33 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index b691ea7..6f56677 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,43 +1,49 @@
-# NB: don't set `language: haskell` here
+language: generic
+sudo: false
 
-# The following enables several GHC versions to be tested; often it's enough to test only against the last release in a major GHC version. Feel free to omit lines listings versions you don't need/want testing for.
-env:
- - CABALVER=1.18 GHCVER=7.8.4
- - CABALVER=1.22 GHCVER=7.10.3
- - CABALVER=1.24 GHCVER=8.0.2
- - CABALVER=2.0 GHCVER=8.2.1
+git:
+  submodules: false  # whether to recursively clone submodules
+
+cache:
+  directories:
+    - $HOME/.cabal/packages
+
+before_cache:
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.*
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/*.json
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.cache
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar.idx
+
+matrix:
+  include:
+    - compiler: "ghc-7.8.4"
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}
+    - compiler: "ghc-7.10.3"
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}
+    - compiler: "ghc-8.0.2"
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-1.24,ghc-8.0.2], sources: [hvr-ghc]}}
+    - compiler: "ghc-8.2.1"
+      addons: {apt: {packages: [ghc-ppa-tools,cabal-install-2.0,ghc-8.2.1], sources: [hvr-ghc]}}
 
-# Note: the distinction between `before_install` and `install` is not important.
 before_install:
- - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
- - travis_retry sudo apt-get update
- - travis_retry sudo apt-get install cabal-install-$CABALVER ghc-$GHCVER # see note about happy/alex
- - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
+  - unset CC
+  - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
+  - travis_retry sudo apt-get update
+  - travis_retry sudo apt-get install cabal-install-$CABALVER ghc-$GHCVER # see note about happy/alex
+  - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
 
 install:
- - cabal --version
- - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
- - travis_retry cabal update
- - cabal install --only-dependencies --enable-tests --enable-benchmarks
+  - cabal --version
+  - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - travis_retry cabal update
+  - cabal install --only-dependencies --enable-tests --enable-benchmarks
 
-# Here starts the actual work to be performed for the package under test; any command which exits with a non-zero exit code causes the build to fail.
 script:
- - if [ -f configure.ac ]; then autoreconf -i; fi
- - cabal configure --enable-tests --enable-benchmarks -v2  # -v2 provides useful information for debugging
- - cabal build   # this builds all libraries and executables (including tests/benchmarks)
- - cabal test
- - cabal check
- - cabal sdist   # tests that a source-distribution can be generated
-
-# The following scriptlet checks that the resulting source distribution can be built & installed
- - export SRC_TGZ=$(cabal info . | awk '{print $2 ".tar.gz";exit}') ;
-   cd dist/;
-   if [ -f "$SRC_TGZ" ]; then
-      cabal install --force-reinstalls "$SRC_TGZ";
-   else
-      echo "expected '$SRC_TGZ' not found";
-      exit 1;
-   fi
+  - cabal configure --enable-tests --enable-benchmarks -v2  # -v2 provides useful information for debugging
+  - cabal build   # this builds all libraries and executables (including tests/benchmarks)
+  - cabal test
 
 deploy:
   skip_cleanup: true