Documentation is outdated due to a build error

[M0NsTeRRR]

Hello,

Documentation hosted on RTD is outdated, there is an issue when building the documentation

https://readthedocs.org/projects/napalm/builds

Last successfull operation was 3 months ago

[M0NsTeRRR]

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/registry.py", line 472, in load_extension
    mod = __import__(extname, None, None, ['setup'])
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/builders/latex/__init__.py", line 37, in <module>
    from sphinx.writers.latex import DEFAULT_SETTINGS, LaTeXWriter, LaTeXTranslator
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/writers/latex.py", line 33, in <module>
    from sphinx.util.template import LaTeXRenderer
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/util/template.py", line 17, in <module>
    from sphinx.jinja2glue import SphinxFileSystemLoader
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/jinja2glue.py", line 16, in <module>
    from jinja2 import FileSystemLoader, BaseLoader, TemplateNotFound, \
ImportError: cannot import name 'contextfunction' from 'jinja2' (/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/jinja2/__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/cmd/build.py", line 303, in build_main
    args.tags, args.verbosity, args.jobs, args.keep_going)
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/application.py", line 224, in __init__
    self.setup_extension(extension)
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/application.py", line 449, in setup_extension
    self.registry.load_extension(self, extname)
  File "/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/sphinx/registry.py", line 475, in load_extension
    raise ExtensionError(__('Could not import extension %s') % extname, err)
sphinx.errors.ExtensionError: Could not import extension sphinx.builders.latex (exception: cannot import name 'contextfunction' from 'jinja2' (/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/jinja2/__init__.py))

Extension error:
Could not import extension sphinx.builders.latex (exception: cannot import name 'contextfunction' from 'jinja2' (/home/docs/checkouts/readthedocs.org/user_builds/napalm/envs/stable/lib/python3.7/site-packages/jinja2/__init__.py))

napalm/requirements.txt

Line 7 in ef8326c

jinja2

Probably related with this mkdocs/mkdocs#2799

[ktbyers]

Should be fixed here:

#1700

This PR still needs to be merged.

[ktbyers]

@M0NsTeRRR Thanks for letting us know.

[M0NsTeRRR]

Build is still failling, I don't have time to look into in before one or two weeks

[M0NsTeRRR]

I assume it works with #1734 make doctest

build succeeded.

The HTML pages are in _build/html.

It's a little ugly some dependencies are outdated, an other issue should be opened to clean and upgrade documentation dependencies, also all dependencies should be pinned with their appropriate version.
There is a lot of requirements.txt file maybe we could reduce the number.

[M0NsTeRRR]

I don't know why there is an error on test, on my laptop I don't get this if someone can look into in

[M0NsTeRRR]

I've added this PR that should fix readthedoc build