revamp Releases page (ros2#106)

Author: dirk-thomas

source/Releases.rst

@@ -1,75 +1,117 @@
 
-ROS 2 Releases
-==============
+ROS 2 Distributions
+===================
 
-Summary
--------
+What is a Distribution?
+-----------------------
 
-A summary of releases of ROS 2 software is listed below.
+See `wiki.ros.org/Distributions <http://wiki.ros.org/Distributions>`_.
+
+List of Distributions
+---------------------
 
 .. toctree::
    :hidden:
    :glob:
 
    Releases/*
 
+.. raw:: html
+
+   <style>
+     .distros td {border: 0px;}
+     .distros tbody tr {background-color: #c0c0c0;}
+     .distros tbody tr:nth-child(1), .distros tbody tr:nth-child(2) {background-color: #33cc66;}
+     .distros td {vertical-align: middle;}
+   </style>
+
+.. |crystal| image:: Releases/crystal-small.png
+   :alt: Crystal logo
+
+.. |bouncy| image:: Releases/bouncy-small.png
+   :alt: Bouncy logo
+
+.. |ardent| image:: Releases/ardent-small.png
+   :alt: Ardent logo
+
 .. list-table::
+   :class: distros
    :header-rows: 1
+   :widths: 35 30 20 15
 
-   * - Release Overview
-     - Date
+   * - Distro
+     - Release date
+     - Logo
+     - EOL date
    * - `Crystal Clemmys <Releases/Release-Crystal-Clemmys>`
-     - 14 December 2018
+     - December 14th, 2018
+     - |crystal|
+     - Dec 2019
    * - `Bouncy Bolson <Releases/Release-Bouncy-Bolson>`
-     - 2 July 2018
+     - July 2nd, 2018
+     - |bouncy|
+     - Jul 2019
    * - `Ardent Apalone <Releases/Release-Ardent-Apalone>`
-     - 8 December 2017
+     - December 8th, 2017
+     - |ardent|
+     - Dec 2018
    * - `beta3 <Releases/Beta3-Overview>`
-     - 13 September 2017
+     - September 13th, 2017
+     -
+     - Dec 2017
    * - `beta2 <Releases/Beta2-Overview>`
-     - 5 July 2017
+     - July 5th, 2017
+     -
+     - Sep 2017
    * - `beta1 <Releases/Beta1-Overview>`
-     - 19 December 2016
-   * - `alpha1-8 <Releases/Alpha-Overview>`
-     - 31 August 2015 - 4 October 2016
-
-Upcoming releases:
-
-.. list-table::
-   :header-rows: 1
-
-   * - Future Release Overview
-     - Date
-   * - `Dashing Diademata <Releases/Release-Dashing-Diademata>`
-     - Summer 2019
+     - December 19th, 2016
+     -
+     - Jul 2017
+   * - `alpha1 - alpha8 <Releases/Alpha-Overview>`
+     - August 31th, 2015
+     -
+     - Dec 2016
 
-For more details about each release, see the corresponding release overview.
+Distribution Details
+~~~~~~~~~~~~~~~~~~~~
 
-Release practices
------------------
+For details on the distributions see each releases page.
+For the supported platforms and versions of common dependencies and other considerations, see the official ROS 2 Target Platforms `REP 2000 <http://www.ros.org/reps/rep-2000.html>`_.
 
-Core packages
-^^^^^^^^^^^^^
+Future Distributions
+--------------------
 
-New ROS 2 distributions are currently released every 6 months.
-During the release process, Open Robotics packages what is in the `ros2.repos
-file <https://github.com/ros2/ros2/blob/master/ros2.repos>`__ into installables for the supported platforms.
-These installables take the form of "fat archives" on MacOS, Windows and Linux, and additionally Debian packages are created for Linux.
-Check the release page for a distribution for details of the supported platform versions.
+For details on upcoming features see the `roadmap <Roadmap>`.
 
-After the first release of a distribution, patch releases may be made that include bug fixes and platform updates (particularly on platforms with rolling dependencies like Windows and MacOS) for the distribution.
-New features are not typically released into an existing distribution, but are saved for the next distribution.
+Currently there is a new ROS 2 distribution roughly every 6 months.
+The following information are best estimates and are subject to change.
 
-The `roadmap <Roadmap>` details the upcoming features that are targeted for the next distribution.
+.. raw:: html
 
-While we do aim to keep the API as stable as possible, 100% API compatibility is not guaranteed between distributions.
+   <style>
+     .future-distros td {vertical-align: middle;}
+   </style>
 
-Internal notes on how a release is made: `Release-Howto <Releases/Release-Howto>`
-
-External packages
-^^^^^^^^^^^^^^^^^
+.. list-table::
+   :class: future-distros
+   :header-rows: 1
+   :widths: 25 30 20 25
 
-Packages outside of the `ros2.repos file <https://github.com/ros2/ros2/blob/master/ros2.repos>`__ may be released by community members
-into a ROS 2 distribution.
-This is currently supported for Linux Debian packages, following `these instructions <Tutorials/Releasing-a-ROS-2-package-with-bloom>`.
-These packages can be released at any time during the lifecycle of a ROS 2 distribution.
+   * - Distro
+     - Release date
+     - Supported for
+     - Planned changes
+   * - `Dashing Diademata <Releases/Release-Dashing-Diademata>`
+     - May 31st, 2019
+     - 2 years
+     -
+   * - <E-turtle>
+     - November 22nd, 2019
+     - 1 year
+     -
+   * - <F-turtle>
+     - May 2020
+     - 3+ years
+     - Target Ubuntu 20.04
+
+After F-turtle the expectations is to release new ROS 2 distributions once per year.