README: document Sphinx build invocation

diff --git a/README b/README
index 377457139f47b56e34ac457fa1a9cf6c607a4cc9..ce1c944db5f5fd383c96561213181c939f4ae5a0 100644 (file)
--- a/README
+++ b/README
@@ -4,7 +4,6 @@ This package wraps NumPy's fft module to produce unitary transforms
 and power spectra of real numbers in one dimension.  See the code for
 the technical details.
 
-
 Installation
 ============
 
@@ -21,7 +20,6 @@ overlay`_.  Install with::
     # layman --add wtk
     # emerge -av dev-python/FFT-tools
 
-
 Dependencies
 ------------
 
@@ -34,7 +32,6 @@ Package  Debian_       Gentoo_
 NumPy_   python-numpy  dev-python/numpy
 =======  ============  ================
 
-
 Installing by hand
 ------------------
 
@@ -47,13 +44,22 @@ standard::
 
     $ python setup.py install
 
+Building the HTML docs
+----------------------
+
+The module objects are documented in the `NumPy/SciPy documentation
+style`_.  You should be able to build this documentation with Sphinx_
+and the numpydoc_ extension.  I haven't been able to get numpydoc
+working cleanly, but you can still build a decent version of the docs
+from the ``doc`` subdirectory with::
+
+    $ PYTHONPATH=.. make SPHINXBUILD=sphinx-build-2.7 dirhtml
 
 Usage
 =====
 
 See the tests in ``FFT_tools.py`` for simple examples.
 
-
 Testing
 =======
 
@@ -66,7 +72,6 @@ need to install matplotlib_.  Then run::
 
     $ python -m FFT_tools --plot
 
-
 Licence
 =======
 
@@ -82,4 +87,8 @@ Version 3`_ or greater.
 .. _Git: http://git-scm.com/
 .. _homepage: http://blog.tremily.us/posts/FFT-tools/
 .. _matplotlib: http://matplotlib.sourceforge.net/
+.. _NumPy/SciPy documentation style:
+   https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt
+.. _Sphinx: http://sphinx-doc.org/
+.. _numpydoc: https://github.com/numpy/numpy/tree/master/doc/sphinxext
 .. _GNU General Public License Version 3: http://www.gnu.org/licenses/gpl.txt