add installer

install.sh

@@ -0,0 +1,105 @@
+#!/bin/bash -e
+
+if ! command -v nano &> /dev/null
+then
+    echo "nano is needed for the installion process"
+    exit 1
+fi
+
+if ! command -v sudo &> /dev/null
+then
+    echo "sudo is needed for the installion process"
+    exit 1
+fi
+
+if ! command -v curl &> /dev/null
+then
+    echo "curl is needed for the installion process"
+    exit 1
+fi
+
+if ! command -v git &> /dev/null
+then
+    echo "git is needed for the installion process"
+    exit 1
+fi
+
+user_name="centralex"
+install_dir="/var/lib/centralex"
+service_file="/etc/systemd/system/centralex.service"
+
+if [ $# -lt 1 ]; then
+    step="root"
+else
+    step="$1"
+fi
+
+echo "running $step setup step"
+
+case "$step" in
+    user)
+        if [[ $(whoami) != "$user_name" ]]; then
+            echo "user step needs to be run as user $user_name"
+            exit 1
+        fi
+
+        cd "$install_dir"
+
+        echo "installing rust..."
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh
+        chmod +x rustup.sh
+        ./rustup.sh -y --profile minimal
+        rm rustup.sh
+
+        echo "cloning source code..."
+        git clone https://github.com/soruh/centralex centralex
+
+        echo "creating default config..."
+        cp centralex/config-template.json centralex/config.json
+    ;;
+    root)
+        if [[ $(whoami) != "root" ]]; then
+            echo "root step needs to be run as root"
+            exit 1
+        fi
+
+        echo "creating user $user_name..."
+        useradd -s /usr/sbin/nologin --create-home --home-dir "$install_dir" "$user_name" 
+
+        echo "creating service file..."
+        cat > "$service_file" << EOF
+[Unit]
+Description=Centralex
+
+[Service]
+Enviroment=RUST_BACKTRACE=1
+ExecStart=$install_dir/.cargo/bin/cargo run --release
+Type=simple
+User=centralex
+WorkingDirectory=$install_dir/centralex
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+    echo "running user step..."
+    installer="$(mktemp)"
+    cp "$0" "$installer"
+    chmod a+rx "$installer"
+    sudo -u "$user_name" "$installer" user
+
+    echo "configuring..."
+    nano "$install_dir/centralex/config.json"
+
+    echo "enabling service..."
+    systemctl enable --now "$(basename "$service_file")"
+    ;;
+    *)
+        echo "unknown installer step $step"
+        exit 1
+    ;;
+esac
+
+echo "success"
+
+exit 0