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[PULL 22/29] meson.build: Make manuals depend on source to Sphinx extens


From: Markus Armbruster
Subject: [PULL 22/29] meson.build: Make manuals depend on source to Sphinx extensions
Date: Tue, 29 Sep 2020 22:19:19 +0200

From: Peter Maydell <peter.maydell@linaro.org>

The automatic dependency handling for Sphinx manuals only makes the output
depend on the input documentation files. This means that if you edit
the Python source of an extension then the documentation won't be
rebuilt.

Create a list of all the source files for the extensions and add
it to the dependencies for the manuals. This is similar to how we
handle the qapi_gen_depends list.

Because we don't try to identify which manuals are using which
Sphinx extensions, a change to the source of one extension will
always rebuild the entire manual set, not merely the manuals
which have changed. This is acceptable because we don't change
the extensions all that often.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200925162316.21205-15-peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Re rebuilding the enitre manual set being acceptable "because we
don't change the extensions all that often": we also rebuild it when
the QAPI generator code the qapidoc extension depends on changes.
This will inconvenience QAPI developers.  Can't be helped now.]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 docs/meson.build | 1 +
 meson.build      | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/docs/meson.build b/docs/meson.build
index 52e384be17..0340d489ac 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -36,6 +36,7 @@ if build_docs
                 output: [manual + '.stamp'],
                 input: [files('conf.py'), files(manual / 'conf.py')],
                 depfile: manual + '.d',
+                depend_files: sphinx_extn_depends,
                 command: [SPHINX_ARGS, '-Ddepfile=@DEPFILE@',
                           '-Ddepfile_stamp=@OUTPUT0@',
                           '-b', 'html', '-d', private_dir,
diff --git a/meson.build b/meson.build
index 866321462e..6cb8aebd7d 100644
--- a/meson.build
+++ b/meson.build
@@ -680,6 +680,14 @@ if get_option('werror')
   SPHINX_ARGS += [ '-W' ]
 endif
 
+sphinx_extn_depends = [ meson.source_root() / 'docs/sphinx/depfile.py',
+                        meson.source_root() / 'docs/sphinx/hxtool.py',
+                        meson.source_root() / 'docs/sphinx/kerneldoc.py',
+                        meson.source_root() / 'docs/sphinx/kernellog.py',
+                        meson.source_root() / 'docs/sphinx/qapidoc.py',
+                        meson.source_root() / 'docs/sphinx/qmp_lexer.py',
+                        qapi_gen_depends ]
+
 # Collect sourcesets.
 
 util_ss = ss.source_set()
-- 
2.26.2




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