# Configuration

`xds-server` configuration is driven by a JSON config file (`server-config.json`).

Here is the logic to determine which `server-config.json` file will be used:

1. from command line option: `--config myConfig.json`
1. `$HOME/.xds/server/server-config.json` file
1. `/etc/xds/server/server-config.json` file
1. `<xds-server executable dir>/server-config.json` file

Supported fields in configuration file are:

- **httpPort** : HTTP port of client webapp/REST API
- **webAppDir** : location of client web application (default: webapp/dist)
- **shareRootDir** : root directory where projects will be copied
- **logsDir**  : directory to store logs (eg. syncthing output)
- **sdkScriptsDir** : directory where scripts, used to managed SDKs, are installed
- **sdkDbUpdate** : define how SDK database(s) is(are) updated, supported values are:
  `disable`, `startup` (default: `startup`)
- **syncthing.binDir** : syncthing binaries directory (default: executable directory)
- **syncthing.home"** : syncthing home directory (usually .../syncthing-config)
- **syncthing.gui-address** : syncthing gui url (default <http://localhost:8385>)
- **syncthing.gui-apikey** : syncthing api-key to use (default auto-generated)

All fields are optional and example below corresponds to the default values.

```json
{
    "httpPort": 8000,
    "webAppDir": "webapp/dist",
    "shareRootDir": "${HOME}/.xds/server/projects",
    "logsDir": "/tmp/logs",
    "sdkScriptsDir": "${EXEPATH}/scripts/sdks",
    "sdkDbUpdate": "startup",
    "syncthing": {
        "binDir": "./bin",
        "home": "${HOME}/.xds/server/syncthing-config",
        "gui-address": "http://localhost:8385",
        "gui-apikey": "123456789",
    }
}
```

>**Notes:**
>
>Environment variables are supported by using `${MY_VAR}` syntax.
>

When `xds-server` is started as a systemd service, default environment variables
are set into `/etc/default/xds-server` file.

`xds-server` configuration is also driven by a JSON config file (`server-config.json`),
and default JSON config is `/etc/xds/server/server-config.json`.

<!-- section-note -->
**Note:**
You can use your own JSON config by settings `APP_CONFIG` variable of
`/etc/default/xds-server` file to your file, for example `/home/MYUSER/.xds/server/server-config.json`
<!-- end-section-note -->

## Disable syncthing

`CloudSync` synchronization type based on `syncthing` tool can be disabled by
simply removing (or renaming) `"syncthing"` key in configuration file.
Here is a JSON configuration file example where syncthing key as been renamed:

```json
{
    "httpPort": 8000,
    "webAppDir": "webapp/dist",
    "shareRootDir": "${HOME}/.xds/server/projects",
    "logsDir": "/tmp/logs",
    "sdkScriptsDir": "${EXEPATH}/scripts/sdks",
    "syncthing_DISABLE": {
        "binDir": "./bin",
        "home": "${HOME}/.xds/server/syncthing-config",
    }
}
```

On benefit to do that is to increase XDS-Server startup time.

<!-- section-note -->
**Note:**

- `CloudSync` (AKA syncthing) synchronization type can also be disabled when `"syncthing"` key is not defined in JSON configuration file.

<!-- end-section-note -->