# Installation Script for OpenEMS

This installation script automates the setup of OpenEMS on a server. It performs the following tasks:

1. **Host Configuration**: Prompts the user to enter the host name for the server. If no input is provided, it defaults to the current hostname.

2. **UI Default Setting**: Asks the user if they want to set the OpenEMS UI as the default for the server. If confirmed, it warns that this will override the default Nginx configuration.

3. **Package Installation**: Updates the package list and installs the required packages, including OpenJDK 17, Nginx, and Wget.

4. **OpenEMS Service Setup**: Downloads the OpenEMS system service configuration and sets up the necessary directories and files for OpenEMS.

5. **Nginx Configuration**: Sets up the Nginx server to serve the OpenEMS UI, including downloading the UI files and configuring the Nginx site.

6. **Service Management**: Reloads the systemd manager configuration, enables, and starts the OpenEMS service, and restarts Nginx to apply the new configuration.

### Installation Instructions

You can install OpenEMS by executing these commands:

```bash
# Download the script
curl -sfLO https://git.mumme-it.de/Mumme-IT/openems-build/raw/branch/main/installation/install-openems.sh

# Make it executable
chmod +x install-openems.sh

# Run the installation script
./install-openems.sh
```

The script will prompt you for:
- The hostname for your server (defaults to current hostname if left empty)
- Whether to set OpenEMS UI as the default site for the server

## Installation

To install OpenEMS, run the following command:
```bash
wget -O - https://git.mumme-it.de/Mumme-IT/openems-build/raw/branch/main/installation/install-openems.sh | bash
```

## Updates

The installation script also supports updating an existing installation. If you run the script on a system that already has OpenEMS installed, it will:

- Update the OpenEMS JAR file
- Update the UI files
- Restart the OpenEMS service

To update your installation, simply run the installation command again:
```bash
wget -O - https://git.mumme-it.de/Mumme-IT/openems-build/raw/branch/main/installation/install-openems.sh | bash
```