Alchemy/ingredients/iron

#!/bin/sh
# Bare Metal Alchemist, 2022

############################################# 
#               Iron - ♂                    # 
############################################# 

# Iron is the most common element found on our planet, and an element
# that we, as a species, frequently rely on to build our tools and
# our society as a whole.

# This ingredient contains functions for building web applications and
# running them frm your server. Expect to use this one a lot if you're
# writing alchemy recipes!

# ------------------- NodeJS Ecosystem -------------------

if [ -d "$NVM_DIR" ]; then
    source $NVM_DIR/nvm.sh
    source $NVM_DIR/bash_completion
fi

set_node_to() {
    if check_for nvm; then
        if ! check_for node; then
            nvm install v16.14.0
        fi

        if [ ! $(node -v) = $1 ]; then
            nvm install $1
            nvm alias default $1
            nvm use default
        fi
    else
        echo "nvm not available, something went wrong..."
    fi
}

install_nvm() {
    say "${BOLD}Installing Node Version Manager${RESET}"                                                                                                                                                                                   
    if [ -d "$NVM_DIR" ]; then
        echo "nvm already installed! skipping"
    else
        chmod +x scripts/nvm_install.sh                                                                                                                                                                                               
        scripts/nvm_install.sh &> /dev/null

        remember "NVM_DIR=$HOME/.nvm"                                                                                                                                                                                                   
    fi
}

# ------------------- Systemd / Services -------------------

build_service_from_template() {
    SERVICE=$1
    shift
    echo ""
    if [ -f resources/service-templates/${SERVICE} ]; then
        say "Creating $SERVICE.service..."
        SERVICE_FILE=/etc/systemd/system/${SERVICE}.service
        if [ -f "$SERVICE_FILE" ]; then
            say "Seems like you've already installed ${SERVICE} here!"
            ask_for reset "Would you like to recreate it? ${BLUE}(y/n)${RESET} "
            case $reset in
                "Y" | "y")
                    sudo rm $SERVICE_FILE
                    ;;
                "N" | "n")
                    say "Okay, we'll leave it as is."
                    ;;
            esac
        fi

        if [ ! -f "$SERVICE_FILE" ]; then
            sudo cp resources/service-templates/${SERVICE} $SERVICE_FILE

            # Common template values
            sudo sed -i "s#USER#${USER}#g" $SERVICE_FILE
            sudo sed -i "s#HOME#${HOME}#g" $SERVICE_FILE
            for keyval; do
                KEY=$(echo $keyval | cut -d'=' -f 1)
                VAL=$(echo $keyval | cut -d'=' -f 2)

                say "Substituting $KEY for $VAL"
                sudo sed -i "s#$KEY#$VAL#g" $SERVICE_FILE
            done
        fi
    else
        say "No service template available for $SERVICE"
    fi
}

activate_service() {
    SERVICE=$1
    SERVICE_FILE=/etc/systemd/system/${SERVICE}.service
    if [ -f "$SERVICE_FILE" ]; then
        say "Enabling and starting ${GREEN}${SERVICE}${RESET}"
        sudo systemctl enable ${SERVICE}
        sudo systemctl start ${SERVICE}
    fi
}

IRON=1