Build docs locally without worry about configuring each time

Author: humitos

docs/Makefile

@@ -7,6 +7,11 @@ SPHINXBUILD   = sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build
 
+# sphinx-hoverxref expected variables
+export READTHEDOCS=True
+export READTHEDOCS_PROJECT=sphinx-hoverxref
+export READTHEDOCS_VERSION=latest
+
 # Put it first so that "make" without argument is like "make help".
 help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
@@ -19,4 +24,4 @@ help:
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 livehtml:
-	sphinx-autobuild -b html --ignore "autoapi/*" --ignore "*#*" --watch "../hoverxref" $(SPHINXOPTS) $(SOURCEDIR) $(BUILDDIR)/html
+	sphinx-autobuild -E -b html --ignore "autoapi/*" --ignore "*#*" --watch "../hoverxref" $(SPHINXOPTS) $(SOURCEDIR) $(BUILDDIR)/html