setup-ghc

#!/bin/bash
#
# Setup GHC environment to build Ganeti

set -euo pipefail

SCRIPT_DIR=$(dirname $(readlink -f $0))

CACHE_DIR="${SCRIPT_DIR}/cache"
GHC_PREFIX="${HOME}/local"
if [[ ${EUID:-${UID}} = 0 ]]; then
    GHC_PREFIX="/usr/local"
fi

# RPM macros
RPM_MACROS=/usr/lib/rpm/macros.d/macros.dist
if [[ -f /etc/rpm/macros.dist ]]; then
    # el7 and el8
    RPM_MACROS=/etc/rpm/macros.dist
fi
RPM_DIST=.$(egrep -o "^%el[0-9]*" "${RPM_MACROS}" | tr -d '%')
echo "RPM_DIST: ${RPM_DIST} (${RPM_MACROS})"

# Setup cache directory
if [[ ! -d "${CACHE_DIR}" ]]; then
    mkdir -p "${CACHE_DIR}"
fi

# Install dependencies
echo "# Install dependencies for GHC"
if [[ -f /usr/bin/dnf ]]; then
    if [[ "${RPM_DIST}" = ".el8" ]]; then
        # el8
        sudo dnf -y install libcurl-devel pcre-devel zlib-devel gmp-devel ncurses-compat-libs
    else
        # el9 or later
        sudo dnf -y install libcurl-devel pcre-devel zlib-devel gmp-devel
        # for GHC
        ln -sf /usr/lib64/libtinfo.so.6 /usr/lib64/libtinfo.so.5
    fi
else
    sudo yum -y install libcurl-devel pcre-devel zlib-devel gmp-devel
fi

TMP_DIR=$(mktemp -d "${HOME}/tmp.XXXXXXXXXX")
pushd "${TMP_DIR}"

# Install ghc
# Ubuntu 20.04.01 LTS + initial: 8.6.5
# Ubuntu 20.04.01 LTS + apt upgrade: 8.8.1
#
# NG: GHC_VERSION=8.8.4
# Error:
# + cabal install cryptonite -f -use_target_attributes
# cabal: Error: Could not find module: AutoConf with any suffix:
# ["gc","chs","hsc","x","y","ly","cpphs","hs","lhs","hsig","lhsig"]. If the
# module is autogenerated it should be added to 'autogen-modules'.
GHC_VERSION=8.6.5
echo "# Install GHC version ${GHC_VERSION}"
if ! type ghc > /dev/null 2>&1; then
    GHC_BINARY_PACKAGE="ghc-${GHC_VERSION}-x86_64-centos7-linux.tar.xz"
    GHC_URL="https://downloads.haskell.org/~ghc/${GHC_VERSION}/${GHC_BINARY_PACKAGE}"
    CACHE_FILE="${CACHE_DIR}/${GHC_BINARY_PACKAGE}"
    echo "- Check cache file: ${CACHE_FILE}"
    if [[ ! -f "${CACHE_FILE}" ]]; then
        echo "- Downlod URL: ${GHC_URL}"
        curl -fsSL "${GHC_URL}" -O
        cp -a "${GHC_BINARY_PACKAGE}" "${CACHE_FILE}"
    else
        echo "- Use cache file: ${CACHE_FILE}"
        cp -a "${CACHE_FILE}" .
    fi
    tar xf "${GHC_BINARY_PACKAGE}"
    cd "ghc-${GHC_VERSION}"
    ./configure --prefix="${GHC_PREFIX}"
    make install
else
    echo "- Skip: ghc found. $(ghc --version)"
fi

# Install cabal-install
echo "# Install cabal-install"
if ! type cabal > /dev/null 2>&1; then
    # Cabal-3.0.1.0 -> 3.0.0.0
    CABAL_VERSION=$(ghc-pkg list Cabal | grep Cabal- | head -1 | egrep -o "\-[0-9].[0-9]" | cut -d'-' -f 2).0.0
    echo "- Install Cabal version ${CABAL_VERSION}"
    CABAL_BINARY_PACKAGE="cabal-install-${CABAL_VERSION}-x86_64-unknown-linux.tar.gz"
    CABAL_URL="https://downloads.haskell.org/~cabal/cabal-install-${CABAL_VERSION}/${CABAL_BINARY_PACKAGE}"
    CACHE_FILE="${CACHE_DIR}/${CABAL_BINARY_PACKAGE}"
    echo "- Check cache file: ${CACHE_FILE}"
    if [[ ! -f "${CACHE_FILE}" ]]; then
        echo "- Downlod URL: ${CABAL_URL}"
        curl -fsSL "${CABAL_URL}" -O
        cp -a "${CABAL_BINARY_PACKAGE}" "${CACHE_FILE}"
    else
        echo "- Use cache file: ${CACHE_FILE}"
        cp -a "${CACHE_FILE}" .
    fi
    tar xf "${CABAL_BINARY_PACKAGE}"
    rm -f cabal.sig
    mkdir -p "${GHC_PREFIX}/bin"
    mv cabal "${GHC_PREFIX}/bin/"
    echo "- Cabal update"
    cabal update
else
    echo "- Skip: cabal found. $(cabal --version)"
fi

popd