# XDS - X(cross) Development System Server

XDS-server is a web server that allows user to remotely cross build applications.

The first goal is to provide a multi-platform cross development tool with
near-zero installation.
The second goals is to keep application sources locally (on user's machine) to
make it compatible with existing IT policies (e.g. corporate backup or SCM).

This powerful webserver (written in [Go](https://golang.org)) exposes a REST
interface over HTTP and also provides a Web dashboard to configure projects and execute only _(for now)_ basics commands.

XDS-server also uses [Syncthing](https://syncthing.net/) tool to synchronize
projects files from user machine to build server machine or container.

> **NOTE**: For now, only Syncthing sharing method is supported to synchronize
projects files.

> **SEE ALSO**: [xds-make](https://github.com/iotbzh/xds-make), a wrapper on `make`
command that allows you to build your application from command-line through
xds-server.


## How to build

### Dependencies

- Install and setup [Go](https://golang.org/doc/install) version 1.7 or
higher to compile this tool.
- Install [npm](https://www.npmjs.com/) : `sudo apt install npm`
- Install [gulp](http://gulpjs.com/) : `sudo npm install -g gulp-cli`


### Building

Clone this repo into your `$GOPATH/src/github.com/iotbzh` and use delivered Makefile:
```bash
 mkdir -p $GOPATH/src/github.com/iotbzh
 cd $GOPATH/src/github.com/iotbzh
 git clone https://github.com/iotbzh/xds-server.git
 cd xds-server
 make all
```

And to install xds-server (by default in `/usr/local/bin`):
```bash
make install
```

>**NOTE:** Used `DESTDIR` to specify another install directory
>```bash
>make install DESTDIR=$HOME/opt/xds-server
>```


## How to run

## Configuration

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

Here is the logic to determine which `config.json` file will be used:
1. from command line option: `--config myConfig.json`
2. `$HOME/.xds/config.json` file
3. `<current dir>/config.json` file
4. `<xds-server executable dir>/config.json` file

Supported fields in configuration file are:
```json
{
    "webAppDir": "location of client dashboard (default: webapp/dist)",
    "shareRootDir": "root directory where projects will be copied",
    "logsDir": "directory to store logs (eg. syncthing output)",
    "sdkRootDir": "root directory where cross SDKs are installed",
    "syncthing": {
        "binDir": "syncthing binaries directory (default: executable directory)",
        "home": "syncthing home directory (usually .../syncthing-config)",
        "gui-address": "syncthing gui url (default http://localhost:8384)",
        "gui-apikey": "syncthing api-key to use (default auto-generated)"
    }
}
```

>**NOTE:** environment variables are supported by using `${MY_VAR}` syntax.

## Start-up

Use `xds-server-start.sh` script to start all requested tools
```bash
/usr/local/bin/xds-server-start.sh
```

>**NOTE** you can define some environment variables to setup for example
config file `XDS_CONFFILE` or change logs directory `LOGDIR`.
See head section of `xds-server-start.sh` file to see all configurable variables.

## Install XDS-server in AGL SDK docker container

XDS-server has been designed to easily cross compile
[AGL](https://www.automotivelinux.org/) applications. That's why XDS-server is
integrated in AGL SDK docker container.

>**NOTE** For more info about AGL SDK docker container, please refer to
[AGL SDK Quick Setup](http://docs.automotivelinux.org/docs/getting_started/en/dev/reference/setup-sdk-environment.html)

### Create XDS AGL docker worker container

You can either load a pre-build docker image or rebuild this image with latest
source code.

* load pre-build docker image:
```bash
wget http://iot.bzh/download/public/2017/XDS/docker/docker_agl_worker-xds-3.2.tar.xz | docker load
```

*  OR execute following commands to rebuild docker image:
```bash
git clone https://git.automotivelinux.org/AGL/docker-worker-generator
cd docker-worker-generator
make build FLAVOUR=xds
```

You should get `docker.automotivelinux.org/agl/worker-xds:X.Y` image

```bash
docker images
REPOSITORY                                      TAG                 IMAGE ID            CREATED             SIZE
docker.automotivelinux.org/agl/worker-xds       3.2                 786d65b2792c        6 days ago          602MB
```

### Start XDS AGL docker worker container

Use provided script to create a new docker image and start a new container:
```bash
> ./docker-worker-generator/contrib/create_container 0 docker.automotivelinux.org/agl/worker-xds:3.2

> docker ps
CONTAINER ID        IMAGE                                               COMMAND                  CREATED              STATUS              PORTS                                                                                         NAMES
b985d81af40c        docker.automotivelinux.org/agl/worker-xds:3.2       "/usr/bin/wait_for..."   6 days ago           Up 4 hours          0.0.0.0:8000->8000/tcp, 0.0.0.0:69->69/udp, 0.0.0.0:10809->10809/tcp, 0.0.0.0:2222->22/tcp    agl-worker-seb-laptop-0-seb
```

This container exposes following ports:
  - 8000 : XDS-server to serve XDS Dashboard
  - 69   : TFTP
  - 2222 : ssh

Now start xds-server inside this container:
```bash
> ssh -p 2222 devel@localhost
[15:59:58] devel@agl-worker-seb-laptop-0-seb:~$ /usr/local/bin/xds-server-start.sh
### Configuration in config.json:
{
    "webAppDir": "/usr/local/bin/www-xds-server",
    "shareRootDir": "/home/devel/.xds/share",
    "logsDir": "/tmp/xds-server/logs",
    "sdkRootDir": "/xdt/sdk",
    "syncthing": {
        "binDir": "/usr/local/bin",
        "home": "/home/devel/.xds/syncthing-config",
        "gui-address": "http://localhost:8384",
        "gui-apikey": "1234abcezam"
    }
}

### Start XDS server
nohup /usr/local/bin/xds-server --config /home/devel/.xds/config.json -log warn > /tmp/xds-server/logs/xds-server.log 2>&1
pid=22379
```

You can now connect your browser to XDS-server (running by default on port 8000):
[http://localhost:8000](http://localhost:8000)


## Debugging

### XDS server architecture

The server part is written in *Go* and web app / dashboard (client part) in
*Angular2*.

```
|
+-- bin/                where xds-server binary file will be built
|
+-- config.json.in      example of config.json file
|
+-- glide.yaml          Go package dependency file
|
+-- lib/                sources of server part (Go)
|
+-- main.go             main entry point of of Web server (Go)
|
+-- Makefile            makefile including
|
+-- README.md           this readme
|
+-- scripts/            hold various scripts used for installation or startup
|
+-- tools/              temporary directory to hold development tools (like glide)
|
+-- vendor/             temporary directory to hold Go dependencies packages
|
+-- webapp/             source client dashboard (Angular2 app)
```

Visual Studio Code launcher settings can be found into `.vscode/launch.json`.


## TODO:
- replace makefile by build.go to make Windows build support easier
- add more tests
- add more documentation
- add authentication / login (oauth) + HTTPS
- enable syncthing user/password + HTTPS