[PATCH 2/2] doc: exclude notmuch-emacs.rst if emacs is not present.

[David Bremner <david@tethera.net>]

This will still generate a warning about an excluded document in the
toctree, but it cuts down on the noise quite a lot.
---
 doc/Makefile.local | 2 +-
 doc/conf.py        | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/doc/Makefile.local b/doc/Makefile.local
index 57104dae..651168f4 100644
--- a/doc/Makefile.local
+++ b/doc/Makefile.local
@@ -4,7 +4,7 @@ dir := doc
 
 # You can set these variables from the command line.
 SPHINXOPTS    := -q
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = HAVE_EMACS=${HAVE_EMACS} sphinx-build
 DOCBUILDDIR      := $(dir)/_build
 
 # Internal variables.
diff --git a/doc/conf.py b/doc/conf.py
index 0ef72327..5f8c9f1c 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -29,6 +29,11 @@ release = version
 # directories to ignore when looking for source files.
 exclude_patterns = ['_build']
 
+# If we don't have emacs, don't build the notmuch-emacs docs, as they need
+# emacs to generate the docstring include files
+if os.environ.get('HAVE_EMACS') != '1':
+    exclude_patterns.append('notmuch-emacs.rst')
+
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
-- 
2.20.1