.travis.yml

# we want to use our custom environment, but the Travis YAML validator
# requires this field to be specified, so we'll just use 'c'
language: c
env:
 # we have to use CABALVER=1.16 for GHC<7.6 as well, as there's
 # no package for earlier cabal versions in the PPA
 - GHCVER=7.4.1  CABALVER=1.16
 - GHCVER=7.4.2  CABALVER=1.16
 - GHCVER=7.6.3  CABALVER=1.16
 - GHCVER=7.8.3  CABALVER=1.18
 - GHCVER=7.10.1 CABALVER=1.22
 - GHCVER=head   CABALVER=head

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
 - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
 - cabal --version

install:
 - travis_retry cabal update
 - cabal install --enable-tests --only-dependencies
 - ghc --version

before_script:
 - | # check if 'streaming' is supported (didn't exist until 1.20)
     if cabal 2>&1 test --show-details=streaming __dummy |
        grep >/dev/null 2>&1 "cabal: --show-details flag expects"
     then streaming=always
     else streaming=streaming
     fi
     export streaming
 - | # skip cabal test on HEAD due to this bug:
     # https://github.com/haskell/cabal/issues/1938
     # this is fine as the test will be run during installation anyway
     if [ "$CABALVER" = head ]
     then def_cabal_test='cabal_test() {
          echo "warning: cabal test skipped due to Cabal bug #1938"
     }'
     else def_cabal_test='cabal_test() {
          cabal test "$@"
     }'
     fi
     export def_cabal_test
 - | # check if '--run-tests' is supported (didn't exist until 1.20);
     # tests must be run prior to install as packages may be broken by install
     if cabal 2>&1 install --run-tests __dummy |
        grep >/dev/null 2>&1 "cabal: unrecognized option"
     then def_cabal_install_run_tests='cabal_install_run_tests() {
          tgz=$1
          shift
          tmp=cabal-install-run-tests.tmp
          mkdir -p "$tmp"
          ( cd "$tmp" && tar xzf - ) <"$tgz"
          ( cd "$tmp"/* &&
            cabal configure --enable-tests &&
            cabal build &&
            cabal test )
          cabal install "$@" "$tgz"
     }'
     else def_cabal_install_run_tests='cabal_install_run_tests() {
          cabal install --run-tests "$@" "$1"
     }'
     fi
     export def_cabal_install_run_tests

script:
 - autoreconf -i
 - cabal configure -v2 --enable-tests
 - cabal build
 - cabal check
 - cabal sdist
 - eval "$def_cabal_test" &&
   cabal_test --show-details=$streaming --test-option="+RTS -N2"
 - eval "$def_cabal_install_run_tests" &&
   cabal_install_run_tests --force-reinstalls dist/*-*.tar.gz