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222
ghcup.sh
Executable file
222
ghcup.sh
Executable file
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#!/bin/sh
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set -e
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## global variables ##
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VERSION=0.0.1
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SCRIPT="$(basename $0)"
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VERBOSE=false
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## print help ##
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usage() {
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(>&2 echo "${SCRIPT} [FLAGS] <SUBCOMMAND>
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FLAGS:
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-v, --verbose Enable verbose output
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-h, --help Prints help information
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-V, --version Prints version information
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SUBCOMMANDS:
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install Update Rust toolchains and rustup
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")
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exit 1
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}
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install_usage() {
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(>&2 echo "${SCRIPT} install [FLAGS] <VERSION>
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FLAGS:
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-h, --help Prints help information
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ARGS:
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<VERSION> E.g. \"8.4.3\" or \"8.6.1\"
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")
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exit 1
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}
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## utilities ##
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die() {
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(>&2 echo "$1")
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exit 2
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}
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if_verbose() {
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if ${VERBOSE} ; then
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printf "$1"
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else
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[ -n "$2" ] && printf "$2"
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fi
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}
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echov() {
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if ${VERBOSE} ; then
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echo "$1"
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fi
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}
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get_distro_name() {
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if [ -f /etc/os-release ]; then
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# freedesktop.org and systemd
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. /etc/os-release
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printf "$NAME"
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elif type lsb_release >/dev/null 2>&1; then
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# linuxbase.org
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printf "$(lsb_release -si)"
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elif [ -f /etc/lsb-release ]; then
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# For some versions of Debian/Ubuntu without lsb_release command
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. /etc/lsb-release
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printf "$DISTRIB_ID"
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elif [ -f /etc/debian_version ]; then
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# Older Debian/Ubuntu/etc.
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printf "Debian"
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else
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# Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
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printf "$(uname -s)"
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fi
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}
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get_distro_ver() {
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if [ -f /etc/os-release ]; then
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# freedesktop.org and systemd
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. /etc/os-release
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printf "$VERSION_ID"
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elif type lsb_release >/dev/null 2>&1; then
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# linuxbase.org
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printf "$(lsb_release -sr)"
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elif [ -f /etc/lsb-release ]; then
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# For some versions of Debian/Ubuntu without lsb_release command
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. /etc/lsb-release
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printf "$DISTRIB_RELEASE"
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elif [ -f /etc/debian_version ]; then
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# Older Debian/Ubuntu/etc.
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printf "$(cat /etc/debian_version)"
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else
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# Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
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printf "$(uname -r)"
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fi
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}
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get_arch() {
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myarch=$(uname -m)
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case "${myarch}" in
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x86_64)
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printf "x86_64" # or AMD64 or Intel64 or whatever
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;;
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i*86)
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printf "i386" # or IA32 or Intel32 or whatever
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;;
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*)
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die "Cannot figure out architecture (was: ${myarch})"
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;;
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esac
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unset myarch
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}
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get_download_url() {
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myghcver=$1
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myarch=$(get_arch)
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mydistro=$(get_distro_name)
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mydistrover=$(get_distro_ver)
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baseurl="https://downloads.haskell.org/~ghc"
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case "${mydistro},${mydistrover},${myarch},${myghcver}" in
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Debian,7,i386,8.2.2)
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-deb${mydistrover}-linux.tar.xz"
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break;;
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*,*,i386,*)
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-deb8-linux.tar.xz"
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break;;
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Debian,8,*,*)
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-deb8-linux.tar.xz"
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break;;
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Debian,*,*,*)
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-deb9-linux.tar.xz"
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break;;
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Ubuntu,*,*,*)
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-deb9-linux.tar.xz"
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break;;
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*,*,*,*) # this is our best guess
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printf "${baseurl}/${myghcver}/ghc-${myghcver}-${myarch}-fedora27-linux.tar.xz"
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break;;
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esac
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unset myghcver myarch mydistro mydistrover baseurl
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}
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## subcommand install ##
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install_ghc() {
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myghcver=$1
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downloader=curl
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downloader_opts="$(if_verbose "-v") -O"
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old_pwd=${PWD}
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inst_location=$HOME/.ghcup/${myghcver}
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echov "Installing ghc for $(get_distro_name) on architecture $(get_arch)"
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cd "$(mktemp -d)"
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echov "Downloading $(get_download_url ${myghcver})"
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${downloader} ${downloader_opts} "$(get_download_url ${myghcver})"
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tar $(if_verbose "-v") -xf ghc-*-linux.tar.xz
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cd ghc-${myghcver}
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if [ -z "$HOME" ] ; then
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die "HOME env not set, cannot install GHC"
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else
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echov "Installing GHC into ${inst_location}"
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fi
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./configure --prefix="${inst_location}"
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make install
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cd "${old_pwd}"
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echo "Done installing, set up your current GHC via: ${SCRIPT} set-ghc ${myghcver}"
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unset myghcver downloader downloader_opts old_pwd inst_location
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}
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## command line parsing and entry point ##
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while [ $# -gt 0 ] ; do
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case $1 in
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-v|--verbose)
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VERBOSE=true
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shift 1;;
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-V|--version)
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printf "${VERSION}"
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exit 0;;
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-h|--help)
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usage;;
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*) case $1 in
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install)
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shift 1
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while [ $# -gt 0 ] ; do
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case $1 in
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-h|--help) install_usage;;
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*) GHC_VER=$1
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break;;
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esac
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done
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[ "${GHC_VER}" ] || install_usage
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install_ghc ${GHC_VER}
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break;;
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*) usage;;
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esac
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break;;
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esac
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done
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