Add installation instruction for R and Julia dependencies tot pip ins…

…tall (#1787)

* Add installation instruction for R and Julia dependencies

* Add autodocsumm for building documentation

doc/sphinx/source/quickstart/installation.rst

@@ -120,12 +120,26 @@ Finally, activate the newly created environment
 
     conda activate esmvaltool
 
-and install ESMValTool as well as any remaining dependencies with the command:
+and install ESMValTool as well as any remaining Python dependencies with the command:
 
 .. code-block:: bash
 
     pip install esmvaltool
 
+If you would like to run Julia diagnostic scripts, you will also need to
+`install Julia <https://julialang.org/downloads/platform/>`_ and the Julia dependencies:
+
+.. code-block:: bash
+
+    esmvaltool install Julia
+
+If you would like to run R diagnostic scripts, you will also need to install the R
+dependencies:
+
+.. code-block:: bash
+
+    esmvaltool install R
+
 Docker installation
 ===================
 
@@ -351,7 +365,7 @@ the following commands in the directory containing the ESMValTool source code
     pip install -e '.[develop]'
 
 If you would like to run Julia diagnostic scripts, you will also need to
-`install Julia <https://julialang.org/downloads/>`_ and the Julia dependencies:
+`install Julia <https://julialang.org/downloads/platform/>`_ and the Julia dependencies:
 
 .. code-block:: bash
 

setup.py

@@ -69,6 +69,7 @@
     # Development dependencies
     # Use pip install -e .[develop] to install in development mode
     'develop': [
+        'autodocsumm',
         'codespell',
         'isort',
         'prospector[with_pyroma]!=1.1.6.3,!=1.1.6.4',