Add Inv sig helper

- Added Inv sig helper

invidious_installer.sh

@@ -422,6 +422,55 @@ add_swap() {
   read_sleep 3
 }
 
+install_inv_sig_helper() {
+  if [[ -d $USER_DIR ]]
+  then
+  echo -e "Downloading Invidious sig helper service from GitHub"
+
+  cd $USER_DIR || exit 1
+
+  git clone https://github.com/iv-org/inv_sig_helper.git
+  chown -R $USER_NAME:$USER_NAME inv_sig_helper
+  cd inv_sig_helper || exit 1
+  # Install cargo / rust
+  curl -fsSL sh.rustup.rs | sh -s -- -y
+  # Source cargo
+  . "$HOME/.cargo/env"
+  # Build release
+  cargo build --release
+  # Copy service file to systemd folder
+  cp -rp $USER_DIR/inv_sig_helper/inv_sig_helper.service /etc/systemd/system/
+  # Add socket to config
+  ${SUDO} echo "signature_server: /home/invidious/tmp/inv_sig_helper.sock" >> $USER_DIR/invidious/config/config.yml
+  if [[ ! -d /home/invidious/tmp ]]
+  then
+    ${SUDO} mkdir -p /home/invidious/tmp
+    chown -R $USER_NAME:$USER_NAME /home/invidious/tmp
+  fi
+  SERVICE_NAME=inv_sig_helper.service
+  # Enable invidious sig helper at boot
+  ${SUDO} $SYSTEM_CMD enable ${SERVICE_NAME}
+  # Reload Systemd
+  ${SUDO} $SYSTEM_CMD daemon-reload
+  # Start Invidious sig helper
+  ${SUDO} $SYSTEM_CMD start ${SERVICE_NAME}
+  if ( $SYSTEM_CMD -q is-active ${SERVICE_NAME})
+  then
+    echo -e "Invidious sig helper service has been successfully installed!"
+    ${SUDO} $SYSTEM_CMD status ${SERVICE_NAME} --no-pager
+    echo -e "Restarting Invidious for changes to take effect..."
+    ${SUDO} $SYSTEM_CMD restart invidious
+    read_sleep 5
+  else
+    echo -e "Invidious sig helper service installation failed..."
+    ${SUDO} journalctl -u ${SERVICE_NAME}
+    read_sleep 5
+  fi
+  else
+    echo -e "Invidious is not installed..."
+  fi
+}
+
 ## get total free memory size in megabytes(MB)
 free=$(free -mt | grep Total | awk '{print $4}')
 if [[ "$free" -le 2048  ]]; then
@@ -1190,6 +1239,7 @@ host    replication     all             ::1/128                 md5" | ${SUDO} t
   # Not figured out why yet, so let's set permissions after as well...
   run_ok "set_permissions" "Setting folder permissions again to be sure"
   run_ok "logrotate_install" "Adding logrotate configuration"
+  run_ok "install_inv_sig_helper" "Installing Inv sig helper"
   log_success "Invidious Setup Finished"
 
   # Make sure the cursor is back (if spinners misbehaved)