hla.sh

#!/usr/bin/env bash
# Script that installs environment for High Level Assembly developement.

PACKAGE_POOL="/usr"

ORIGINAL_URL="http://www.plantation-productions.com/Webster/HighLevelAsm/HLAv2.16/linux.hla.tar.gz"
FALLBACK_URL="http://legacy.murda.eu/downloads/misc/hla-linux.tar.gz"

# You need root permissions to run this script.
if [[ "${UID}" != '0' ]]; then
    echo '> You need to become root to run this script.'
    echo '> Aborting.'
    exit 1
fi

# Install packages.
if ! command -v grep 1> /dev/null 2>&1; then
    pacman --noconfirm -S grep
fi

if ! command -v wget 1> /dev/null 2>&1; then
    pacman --noconfirm -S wget
fi

# Download HLA archive.
TMP_DATE="$(date +%s)"
TMP_FILE="/tmp/hla-${TMP_DATE}.tar.gz"
TMP_PATH="/tmp/hla-${TMP_DATE}"

if ! wget "${ORIGINAL_URL}" -O "${TMP_FILE}"; then
    if ! wget "${FALLBACK_URL}" -O "${TMP_FILE}"; then
        echo '> Unable to download required files, exiting.'
        echo '> Aborting.'
        exit 1
    fi
fi

# Extract archive.
[[ -d "${TMP_PATH}" ]] || mkdir -p "${TMP_PATH}"
tar -xf "${TMP_FILE}" --directory "${TMP_PATH}"

# Copy files.
cp -r "${TMP_PATH}/usr/"* "${PACKAGE_POOL}/"

while IFS= read -r -d '' BINARY
do
    BASENAME=$(basename "${BINARY}")
    ln -sf "${BINARY}" "${PACKAGE_POOL}/bin/${BASENAME}"
done < <(find "${PACKAGE_POOL}/hla" -maxdepth 1 -type f -executable -print0)

# Setup global environment variables.
if ! grep -Fq 'export hlalib=' /etc/profile; then
    echo "export hlalib=${PACKAGE_POOL}/hla/hlalib" >> /etc/profile
fi

if ! grep -Fq 'export hlainc=' /etc/profile; then
    echo "export hlainc=${PACKAGE_POOL}/hla/include" >> /etc/profile
fi

# Cleanup.
rm -rf "${TMP_FILE}" "${TMP_PATH}"

# Let user know that script has finished its job.
echo '> Finished.'