source_archive.sh

#!/bin/sh

usage() {
  cat 1>&2 <<EOS
SYNOPSIS
        ${SCRIPT_NAME} TARGET VERSION

        TARGET  either of the followings:
                gmp, mpfr, mpc, isl, cloog, lzip, gcc, binutils
EOS
};

exit_iferror() {
  EXIT_CODE=$?
  ERROR_MSG=$@
  [ ${EXIT_CODE} -eq 0 ] ||
    cat 1>&2 <<EOS
${ERROR_MSG}
Exit code=${EXIT_CODE}
EOS
  [ ${EXIT_CODE} -eq 0 ] || exit ${EXIT_CODE}
};

use_inflater_for() {
    case "${1}" in
      "tar.gz" )
        INFLATER="gzip -cdq"
        PREREQUISITES="gzip "${PREREQUISITES}
      ;;
      "tar.bz2" )
        INFLATER="bzip2 -cdkq"
        PREREQUISITES="bzip2 "${PREREQUISITES}
      ;;
      "tar.lz" )
        INFLATER="lzip -cdkq"
        PREREQUISITES="lzip "${PREREQUISITES}
      ;;
      * )
        cat 1>&2 <<EOS
Error: No decompression algorithm available for ${1}
EOS
        exit 1
      ;;
    esac
};

download() {
  URL=${1}
  case "${DOWNLOADER}" in
    "wget" )
      wget -q ${URL} -O -
    ;;
    "curl" )
      curl -L ${URL}
    ;;
  esac
}

# Constants
#   Some of these are determined at runtime. They should not be touched.
SCRIPT_NAME=${0}
TOOLS_ROOT=$(readlink -f $(dirname ${0})/..)

# Arguments
TARGET_NAME=${1}
TARGET_VERSION=${2}
[ -z "${TARGET_NAME}" ] && usage && exit 1
[ -z "${TARGET_VERSION}" ] && usage && exit 1

# Variables
INFLATER="gzip -cdq"
DOWNLOADER="curl"

ARCHIVE_LOC_SCHEME="http"
ARCHIVE_LOC_HOST=
ARCHIVE_LOC_PATH=
ARCHIVE_SUFFIX=

PREREQUISITES="wget"

case "${TARGET_NAME}" in
  "gmp" )
    ARCHIVE_LOC_SCHEME="https"
    ARCHIVE_LOC_HOST="gmplib.org"
    ARCHIVE_LOC_PATH="/download/gmp/"
    ARCHIVE_SUFFIX="tar.lz"
  ;;
  "mpfr" )
    ARCHIVE_LOC_SCHEME="http"
    ARCHIVE_LOC_HOST="www.mpfr.org"
    ARCHIVE_LOC_PATH="/mpfr-current/"
    ARCHIVE_SUFFIX="tar.bz2"
  ;;
  "mpc" )
    ARCHIVE_LOC_SCHEME="ftp"
    ARCHIVE_LOC_HOST="ftp.gnu.org"
    ARCHIVE_LOC_PATH="/gnu/mpc/"
    ARCHIVE_SUFFIX="tar.gz"
  ;;
  "isl" )
    ARCHIVE_LOC_SCHEME="ftp"
    ARCHIVE_LOC_HOST="gcc.gnu.org"
    ARCHIVE_LOC_PATH="/pub/gcc/infrastructure/"
    ARCHIVE_SUFFIX="tar.bz2"
  ;;
  "cloog" )
    ARCHIVE_LOC_SCHEME="ftp"
    ARCHIVE_LOC_HOST="gcc.gnu.org"
    ARCHIVE_LOC_PATH="/pub/gcc/infrastructure/"
    ARCHIVE_SUFFIX="tar.gz"
  ;;
  "lzip" )
    ARCHIVE_LOC_SCHEME="http"
    ARCHIVE_LOC_HOST="download.savannah.gnu.org"
    ARCHIVE_LOC_PATH="/releases/lzip/"
    ARCHIVE_SUFFIX="tar.gz"
  ;;
  "gcc" )
    ARCHIVE_LOC_SCHEME="http"
    ARCHIVE_LOC_HOST="ftp.tsukuba.wide.ad.jp"
    ARCHIVE_LOC_PATH="/software/gcc/releases/gcc-${TARGET_VERSION}/"
    ARCHIVE_SUFFIX="tar.gz"
  ;;
  "curl" )
    ARCHIVE_LOC_SCHEME="http"
    ARCHIVE_LOC_HOST="curl.haxx.se"
    ARCHIVE_LOC_PATH="/download/"
    DOWNLOADER="wget"
    ARCHIVE_SUFFIX="tar.gz"
  ;;
  "binutils" )
    ARCHIVE_LOC_SCHEME="http"
    ARCHIVE_LOC_HOST="ftp.gnu.org"
    ARCHIVE_LOC_PATH="/gnu/binutils/"
    ARCHIVE_SUFFIX="tar.bz2"
  ;;
  * )
    cat 1>&2 <<EOS
[Error] ${TARGET_NAME} not available.
EOS
    usage
    exit 1
  ;;
esac

use_inflater_for ${ARCHIVE_SUFFIX}

# Checking if prerequisite tools are installed
for PREREQ in ${PREREQUISITES}
do
  echo "Searching ${PREREQ}..." 1>&2
  PREREQ_PATH=$(which ${PREREQ})
  exit_iferror "[Error] ${PREREQ} not found."
  echo "[Success] ${PREREQ} found at "${PREREQ_PATH}"\n" 1>&2
done

ARCHIVE_FILENAME="${TARGET_NAME}-${TARGET_VERSION}.${ARCHIVE_SUFFIX}"
ARCHIVE_URL="${ARCHIVE_LOC_SCHEME}://${ARCHIVE_LOC_HOST}${ARCHIVE_LOC_PATH}${ARCHIVE_FILENAME}"

download ${ARCHIVE_URL} | ${INFLATER}