travis-install.sh

#!/bin/sh
set -ex

travis_retry () {
    $*  || (sleep 1 && $*) || (sleep 2 && $*)
}

if [ "$GHCVER" = "none" ]; then
    travis_retry sudo add-apt-repository -y ppa:hvr/ghc
    travis_retry sudo apt-get update
    travis_retry sudo apt-get install --force-yes ghc-$GHCVER
fi

if [ -z ${STACKAGE_RESOLVER+x} ]; then
    if [ "$TRAVIS_OS_NAME" = "linux" ]; then
        travis_retry sudo add-apt-repository -y ppa:hvr/ghc
        travis_retry sudo apt-get update
        travis_retry sudo apt-get install --force-yes cabal-install-1.24 happy-1.19.5 alex-3.1.7 ghc-$GHCVER-prof ghc-$GHCVER-dyn
        if [ "x$TEST_OTHER_VERSIONS" = "xYES" ]; then travis_retry sudo apt-get install --force-yes ghc-7.0.4-prof ghc-7.0.4-dyn ghc-7.2.2-prof ghc-7.2.2-dyn ghc-head-prof ghc-head-dyn; fi

    elif [ "$TRAVIS_OS_NAME" = "osx" ]; then

        case $GHCVER in
            8.0.1)
                GHCURL=http://downloads.haskell.org/~ghc/8.0.1/ghc-8.0.1-x86_64-apple-darwin.tar.xz;
                GHCXZ=YES
                ;;
            7.10.3)
                GHCURL=http://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3b-x86_64-apple-darwin.tar.xz
                GHCXZ=YES
                ;;
            7.8.4)
                GHCURL=https://www.haskell.org/ghc/dist/7.8.4/ghc-7.8.4-x86_64-apple-darwin.tar.xz
                GHCXZ=YES
                ;;
            7.6.3)
                GHCURL=https://www.haskell.org/ghc/dist/7.6.3/ghc-7.6.3-x86_64-apple-darwin.tar.bz2
                ;;
            7.4.2)
                GHCURL=https://www.haskell.org/ghc/dist/7.4.2/ghc-7.4.2-x86_64-apple-darwin.tar.bz2
                ;;
            *)
                echo "Unknown GHC: $GHCVER"
                false
                ;;
        esac

        travis_retry curl -OL $GHCURL
        if [ "$GHCXZ" = "YES" ]; then
            tar -xJf ghc-*.tar.*;
        else
            tar -xjf ghc-*.tar.*;
        fi

        cd ghc-*;
        ./configure --prefix=$HOME/.ghc-install/$GHCVER
        make install;
        cd ..;

        travis_retry curl -L https://www.haskell.org/cabal/release/cabal-install-1.24.0.0/cabal-install-1.24.0.0-x86_64-apple-darwin-yosemite.tar.gz -o cabal-install.tar.gz
        TAR=$PWD/cabal-install.tar.gz
        mkdir "${HOME}/bin"
        (cd "${HOME}/bin" && tar -xzf "$TAR")
        "${HOME}/bin/cabal" --version

    else
        echo "Not linux or osx: $TRAVIS_OS_NAME"
        false
    fi

else # Stack-based builds
    mkdir -p ~/.local/bin
    travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 \
        | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
    stack setup --resolver "$STACKAGE_RESOLVER"

fi

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