Invert order of installation chapters

To make install process more understandable, document
first installation of xds-server part and then installation
of xds tools.

Change-Id: I5733c5d6885f45ff98cc9fee0d04362f76a86a4c
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>

1 files changed, 113 insertions, 0 deletions

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+# Installing XDS client tools
+
+[xds-agent](https://gerrit.automotivelinux.org/gerrit/gitweb?p=src/xds/xds-agent.git) is a client tool that must run
+on your machine (user / developer host) to be able to use XDS.
+
+You should establish the following chain:
+
+- XDS Client: (`xds-cli` or XDS Dashboard).
+- XDS Agent: (`xds-agent`) running on your machine.
+- XDS Server  (`xds-server`) running on a remote server and/or in a container.
+
+Exchanges between these 3 tools are done though HTTP and Websocket protocols.
+
+Default url/port mentioned in schema below can be change using config files.
+
+![XDS blocks chain](./pictures/xds-block-chain.png)
+
+Installation of other XDS client tools, such as `xds-cli` or `xds-gdb` is
+optional and depends of what you want to do:
+
+- [xds-cli](https://gerrit.automotivelinux.org/gerrit/gitweb?p=src/xds/xds-cli.git) : command line tool to used to interact with XDS (also used by IDE integration).
+- [xds-gdb](https://gerrit.automotivelinux.org/gerrit/gitweb?p=src/xds/xds-gdb.git) : requested for debugging application.
+
+## Install packages for debian distro type
+
+```bash
+# 'DISTRO' can be set to { xUbuntu_16.04, xUbuntu_16.10, xUbuntu_17.04, Debian_8.0, Debian_9.0 }
+export DISTRO="xUbuntu_16.04"
+
+# AGL_RELEASE can be set to {AGL_ElectricEel, AGL_FunkyFlounder, AGL_Master}
+export AGL_RELEASE="AGL_Master"
+
+wget -O - http://download.opensuse.org/repositories/isv:/LinuxAutomotive:/${AGL_RELEASE}/${DISTRO}/Release.key | sudo apt-key add -
+sudo bash -c "cat >> /etc/apt/sources.list.d/AGL.list <<EOF
+deb http://download.opensuse.org/repositories/isv:/LinuxAutomotive:/${AGL_RELEASE}/${DISTRO}/ ./
+EOF"
+
+sudo apt-get update
+sudo apt-get install agl-xds-agent
+sudo apt-get install agl-xds-cli
+sudo apt-get install agl-xds-gdb
+```
+
+## Install packages for openSUSE distro type
+
+```bash
+# DISTRO can be set to {openSUSE_Leap_42.3, openSUSE_Leap_15.0, openSUSE_Tumbleweed}
+export DISTRO="openSUSE_Leap_15.0"
+
+# AGL_RELEASE can be set to {AGL_ElectricEel, AGL_FunkyFlounder, AGL_Master}
+export AGL_RELEASE="AGL_Master"
+
+sudo zypper ar http://download.opensuse.org/repositories/isv:/LinuxAutomotive:/${AGL_RELEASE}/${DISTRO}/isv:LinuxAutomotive:${AGL_RELEASE}.repo
+
+sudo zypper ref
+sudo zypper install agl-xds-agent
+sudo zypper install agl-xds-cli
+sudo zypper install agl-xds-gdb
+```
+
+## Install for other platforms (Windows / MacOS)
+
+- Install `xds-agent`:
+
+  1. Download the latest released tarball from github [releases page](https://github.com/iotbzh/xds-agent/releases).
+
+  1. Then unzip the tarball any where into your local disk (for example: `/opt/AGL/xds` or `C:\AGL\xds`).
+
+  1. Add binary to PATH:
+
+      - MacOs: create the .bash_profile `nano .bash_profile` and add `export PATH="/opt/AGL/xds/xds-agent:$PATH`
+      - Windows: change the system path via control panel or system settings or
+    `setx path "C:\AGK\xds\xds-agent;%path%"`
+
+- repeat the previous steps to install other tools depending of your needs:
+  - `xds-cli` : requested for command line and IDE integration. ([released tarball link](https://github.com/iotbzh/xds-cli/releases)).
+  - `xds-gdb` : requested for debugging application. ([released tarball link](https://github.com/iotbzh/xds-gdb/releases)).
+
+## Start xds-agent
+
+XDS-agent is a client tool that must run on your local / user development
+machine when you use XDS.
+
+For **Linux** distro, a user systemd service is provided, `xds-agent.service`.
+
+To start it automatically at boot and you can enable it using following commands:
+
+```bash
+# Enable xds-agent service at boot
+systemctl --user enable xds-agent.service
+```
+
+To start the XDS-agent service:
+
+```bash
+# Manually start xds-agent service
+systemctl --user start xds-agent.service
+
+# Get status and log of xds-agent service
+systemctl --user status xds-agent.service
+```
+
+On **MacOS** (or Linux), you can start-it manually using following commands:
+
+```batch
+/opt/AGL/bin/xds-agent
+```
+
+On **Windows**, you can start-it manually using following commands:
+
+```batch
+C:\AGL\xds\xds-agent\xds-agent.exe
+```