Add documentation on updating the plugin manually

Signed-off-by: Rafal Kapuscik <rkapuscik@antmicro.com>

xc7/nightly.rst

@@ -0,0 +1,29 @@
+Obtaining nightly version of the tools
+======================================
+
+Sometimes it may be preferable to get the latest versions of the tools even beforethe full Toolchain is validated and upgraded. These tools **are not guaranteered to be bug free**, but they enable users to take advantage of the latest fixes available.
+
+Updating Yosys SystemVerilog plugin
+-----------------------------------
+
+Activate the conda repository for the correct family:
+
+.. code-block:: bash
+   :name: activate-xc7
+
+   conda activate xc7
+
+Obtain the latest release of the plugin from `here <https://github.com/antmicro/yosys-uhdm-plugin-integration/releases>`_:
+
+.. code-block:: bash
+   :name: get-plugin
+
+   wget https://github.com/antmicro/yosys-uhdm-plugin-integration/releases/download/e3a87e3-2022-06-17/yosys-uhdm-plugin-e3a87e3-Ubuntu-20.04-focal-x86_64.tar.gz
+   tar -xzf yosys-uhdm-plugin-e3a87e3-Ubuntu-20.04-focal-x86_64.tar.gz
+
+Install the plugin using provided installation script. It will use the `yosys-config` from conda, so it will install into the conda environment.
+
+.. code-block:: bash
+   :name: install-plugin
+
+   ./install-plugin.sh