A script for installing Node.JS on Linux. Defaults to the newest available version and the linux-x64 distro. Also see https://nodejs.org/en/download/current and https://github.com/nodejs/help/wiki/Installation.

node_install.sh

# shellcheck shell=sh

help () {
    echo "Usage: ./node_install.sh [version[, distro]]"
    echo "Pass 'help' as the first argument or '-h' or '--help' in any position to view this menu."
    echo "The default distro is linux-x64. The default version is the newest release."
    echo "Examples:"
    echo $'./node_install\t\t\t\tInstalls the linux-x64 release of the newest version of Node.JS.'
    echo $'./node_install v18.0.0\t\t\tInstalls the linux-x64 release of Node.JS v18.0.0.'
    echo $'./node_install v18.0.0 linux-arm64\tInstalls the linux-arm64 release of Node.JS v18.0.0.'
    echo
    echo "Based on the instructions given in https://github.com/nodejs/help/wiki/Installation."
    exit
}

if [[ $1 == 'help' ]]; then
    help
fi

for arg in "$@"
do
    if [[ $arg == '-h' ]] || [[ $arg == '--help' ]]; then
        help
    fi
done

VERSION=$1
DISTRO=$2

INSTALL_DIR='/usr/local/lib/nodejs'
BIN_PATH='/usr/bin'
TMP_PATH='/tmp'

# If no version was provided through the arguments
if [ -z $VERSION ]; then
    echo "Fetching versions..."
    # Fetch versions, get the most recent version - should be on the second line of the file
    newest_version_info=$(curl https://nodejs.org/dist/index.tab -s | head -2 | tail -1)
    # Split on whitespace
    info_array=(${newest_version_info///})

    VERSION=${info_array[0]}
    echo "Versions fetched. Newest version is $VERSION." $'\n'
fi

# Set default distro if none was provided
if [ -z $DISTRO ]; then
    DISTRO=linux-x64
fi

version_name="node-$VERSION-$DISTRO"
file_name="$version_name.tar.xz"
file_path=$TMP_PATH/$file_name
download_path="https://nodejs.org/dist/$VERSION/$file_name"

echo "Installing version $VERSION and distro $DISTRO."

echo $'\nDownloading...'
# Download file
curl $download_path -o $file_path
echo 'Downloaded.'

echo $'\nMaking install dir; extracting...'
# Make install dir, if it doesn't already exist
sudo mkdir -p $INSTALL_DIR
# Extract tarball
sudo tar -xJf $file_path -C $INSTALL_DIR
echo 'Extracted.'

echo $'\nMaking symlinks...'
# Symlink executables
sudo ln -sf $INSTALL_DIR/$version_name/bin/node $BIN_PATH/node
sudo ln -sf $INSTALL_DIR/$version_name/bin/npm  $BIN_PATH/npm
sudo ln -sf $INSTALL_DIR/$version_name/bin/npx  $BIN_PATH/npx
echo 'Symlinks made.'

# Cleanup
rm $file_path

echo 'Finished.'