Since the docstrings are not built in the case of --without-emacs,
even if emacs is detected, don't let sphinx build the emacs docs. This
avoids a large number of error messages due to missing includes. It's
actually a bit surprising sphinx doesn't generate an error for the
missing include files.
It seems our previous attempt with order-only targets was not
sufficient to avoid problems with sphinx-builds doctree cache [0].
Looking around at other people's approaches [1], using separate
doctrees was suggested. I guess there might be a slight loss of
efficiency, but it seems more robust.
[0]: build failures were first noticed in Debian experimental, but I was able to duplicate it in
my usual build environment about 1 in 8 builds.
[1]: in particular
9e3fc1657d
This should silence some warnings about the jobserver, but also make
it easier to build the docs where GNU make is called something other
than make.
Based on a patch from aidecoe.
In certain conditions the parallel calls to sphinx-build could
collide, yielding a crash like
Exception occurred:
File "/usr/lib/python3/dist-packages/sphinx/environment.py", line 1261, in get_doctree
doctree = pickle.load(f)
EOFError: Ran out of input
Install man pages based on $(MAN_GZIP_FILES), which directly
corresponds to the man page source rst files. This way we can filter
the man pages to be installed as needed.
Use $(wildcard ...) to generate the list of man pages based on the rst
source files present in the man page directories, instead of reading
conf.py. This has three main benefits:
1) This makes the man page build slightly less complicated and easier
to understand. At least there are fewer moving parts.
2) This makes the build fail if we add a man page rst file, but fail
to add it to conf.py.
3) We can use Sphinx constructs in conf.py that are not available when
importing the file into a normal python program such as
mkdocdeps.py.
If Sphinx fails to create any of the roff files, having touch create
them hides the errors until someone realizes, possibly much later,
that the resulting files are empty. (Note that gzip doesn't fail on
empty input files.) Sphinx will change the timestamps of any files it
has written anyway.
Thanks to FreeBSD port maintainer Mikhail for report and the original
the original patch.
This is the right thing (TM) and also apparently fixes the build on
FreeBSD.
There is a doxygen bug about these odd files,
https://bugzilla.gnome.org/show_bug.cgi?id=727796
But it isn't clear if / when a fix will be provided, so just delete it
to avoid e.g. confusing man-to-wiki.pl
The roff build rule builds all of the roff files in a single command.
Previously, this was expressed as a multi-target rule, but since this
is equivalent to specifying a copy of the rule for each target, make
-jN could start up to N parallel instances of this command. Fix this
by bottlenecking this rule through a single stamp file.
This also removes the unused man.stamp from CLEAN.
The subtle part is adding .rst and .py files to vpath so they can be
used as dependencies without prefixing with $(srcdir)
We also change the interface to mkbuildeps.py: rather than getting the
containing directory from the conf file path, we go the other way.
Because sphinx-build does not provide a convenient way of listing
which builders exist, and some people actually have pre 1.0 sphinx, we
try loading a relevant python module.
Currently the assumption is that no python in path -> no sphinx-build
in path.
It turns out there was a reason the old man pages were stored in a man
compatible hierarchy, namely so that we could run man on them before
installing.
Hardcode doc build location into test suite. This isn't ideal, but
let's unbreak the test suite for now.
This helps avoid build artifacts (namely, nroff and gzipped-nroff man
pages) owned by root.
The variables allow choosing which generator to use for the man page.
These will be hooked to configure in a following commit.
The python script mkdocdeps.py is used to import the list of man pages
from the sphinx configuration to make.
This will delete the (release only) target update-man-versions. This
will be replaced in a followup commit.
This is the output from sphinx-quickstart, massaged a bit, along with
our existing man pages converted to rst.
A skeleton notmuch-emacs manual is also included. It is not suitable
for end user use yet.
