[lldb] Fix the man page build

In D94489 we changed the way we build the docs and now have some additional
dependencies to generate the Python API docs. As the same sphinx project is
generating the man pages for LLDB it should have in theory the same setup code
that sets up the mocked LLDB module.

However, as we don't have that setup code the man page generation just fails as
there is no mocked LLDB module and the Python API generation errors out.

The man page anyway doesn't cover the Python API so I don't think there is any
point of going through the whole process (and requiring the sphinx plugins) just
to generate the (eventually unused) Python docs.

This patch just skips the relevant Python API generation when we are building
the man page.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D98441

1 files changed, 28 insertions, 14 deletions

diff --git a/lldb/docs/conf.py b/lldb/docs/conf.py
index d55aad2..b614f43 100644
--- a/lldb/docs/conf.py
+++ b/lldb/docs/conf.py
@@ -15,16 +15,21 @@ from __future__ import print_function
 import sys, os, re
 from datetime import date
 
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-
-# Add the current directory that contains the mock _lldb native module which
-# is imported by the `lldb` module.
-sys.path.insert(0, os.path.abspath("."))
-# Add the build directory that contains the `lldb` module. LLDB_SWIG_MODULE is
-# set by CMake.
-sys.path.insert(0, os.getenv("LLDB_SWIG_MODULE"))
+building_man_page = tags.has('builder-man')
+
+# For the website we need to setup the path to the generated LLDB module that
+# we can generate documentation for its API.
+if not building_man_page:
+    # If extensions (or modules to document with autodoc) are in another directory,
+    # add these directories to sys.path here. If the directory is relative to the
+    # documentation root, use os.path.abspath to make it absolute, like shown here.
+
+    # Add the current directory that contains the mock _lldb native module which
+    # is imported by the `lldb` module.
+    sys.path.insert(0, os.path.abspath("."))
+    # Add the build directory that contains the `lldb` module. LLDB_SWIG_MODULE is
+    # set by CMake.
+    sys.path.insert(0, os.getenv("LLDB_SWIG_MODULE"))
 
 # Put the generated Python API documentation in the 'python_api' folder. This
 # also defines the URL these files will have in the generated website.
@@ -37,8 +42,12 @@ automodapi_toctreedirnm = 'python_api'
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.todo', 'sphinx.ext.mathjax', 'sphinx.ext.intersphinx',
-              'sphinx_automodapi.automodapi']
+extensions = ['sphinx.ext.todo', 'sphinx.ext.mathjax', 'sphinx.ext.intersphinx']
+
+# Unless we only generate the basic manpage we need the plugin for generating
+# the Python API documentation.
+if not building_man_page:
+    extensions.append('sphinx_automodapi.automodapi')
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -52,7 +61,7 @@ try:
   import recommonmark
 except ImportError:
   # manpages do not use any .md sources
-  if not tags.has('builder-man'):
+  if not building_man_page:
     raise
 else:
   import sphinx
@@ -97,7 +106,12 @@ copyright = u'2007-%d, The LLDB Team' % date.today().year
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 exclude_patterns = ['_build', 'analyzer']
-
+# Ignore the generated Python documentation that is only used on the website.
+# Without this we will get a lot of warnings about doc pages that aren't
+# included by any doctree (as the manpage ignores those pages but they are
+# potentially still around from a previous website generation).
+if building_man_page:
+    exclude_patterns.append(automodapi_toctreedirnm)
 # Use the recommended 'any' rule so that referencing SB API classes is possible
 # by just writing `SBData`.
 default_role = 'any'