make html : TypeError: add_source_parser() takes 2 positional arguments but 3 were given

[netbomo]

Hello,
I'm trying to build doc from a venv, but when I try make html I have this error :

File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/application.py", line 1069, in add_source_parser
    self.registry.add_source_parser(*args, **kwargs)
TypeError: add_source_parser() takes 2 positional arguments but 3 were given

make: *** [Makefile:23: html] Error 2

Here is the log file :

# Sphinx version: 3.0.4
# Python version: 3.7.3 (CPython)
# Docutils version: 0.16 release
# Jinja2 version: 2.11.2
# Last messages:

# Loaded extensions:
Traceback (most recent call last):
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/cmd/build.py", line 279, in build_main
    args.tags, args.verbosity, args.jobs, args.keep_going)
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/application.py", line 244, in __init__
    self.setup_extension(extension)
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/application.py", line 398, in setup_extension
    self.registry.load_extension(self, extname)
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/registry.py", line 414, in load_extension
    metadata = setup(app)
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/m2r.py", line 652, in setup
    app.add_source_parser('.md', M2RParser)
  File "/path_to_project/sources/venv/lib/python3.7/site-packages/sphinx/application.py", line 1069, in add_source_parser
    self.registry.add_source_parser(*args, **kwargs)
TypeError: add_source_parser() takes 2 positional arguments but 3 were given

the makefile :

# Minimal makefile for Sphinx documentation
#

# You can set these variables from the command line.
SPHINXOPTS    =
SPHINXRST     = sphinx-apidoc
SPHINXBUILD   = sphinx-build
SPHINXPROJ    = Windviewer
SPHINXMODULE  = windviewer
SOURCEDIR     = source
BUILDDIR      = build

# Put it first so that "make" without argument is like "make help".
help:
	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

.PHONY: help Makefile

rst:
	@$(SPHINXRST) -f -o "$(SOURCEDIR)" "../../$(SPHINXMODULE)"

html:
	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

# Catch-all target: route all unknown targets to Sphinx using the new
# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
%: Makefile
	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

I've allready build the doc but not in the venv, and it was working, but I add import modules problems so I try it in the venv, see the post :

autodoc: failed to import module 'routes' from module 'app_folder'

Thanks for the feedback!

Gilou

[netbomo]

I've remove the 'm2r' extension in my conf.py, and the documentation is generated. But how can I use it? I need to add some markdown like a README.md from gitlab repo.

Thanks!

[tk0miya]

The add_source_parser() API has changed since Sphinx-1.8.0. And it seems m2r extension does not use the new style. That was filed as miyakogi/m2r#51. Please pin Sphinx to 2.x to wait for the update.
Thanks,