For consistency with other browse views, deprecate the
/browse/directory/(sha1_git)/(path)/ endpoint and add a new one taking
path as query parameter.

Some browse views different from origin context ones can take an
optional 'origin' query parameter name. For consistency whith origin
context views, rename that parameter to 'origin_url'.

Backward compatibility is already ensured in current implementation.

Deprecate all origin context views taking an origin as url argument and add
new views taking the origin url as query parameter.

This change should mitigate double-slash issue that can happen on some clients
or under certain apache2 configuration.

Fix a regression inroduced in 09e18940: when a revision id is null (for
instance when browsing an empty snapshot), do not attempt to lookup revision
data to avoid an error 500.

pytest-django and pytest-flask both declare a fixture named client and
the wrong one is picked when running swh-web tests.

So avoid the loading of pytest flask plugin to prevent errors when
running tests.

Disambiguate and/or deprecate the following browse URLs:

  - GET /browse/origin/(origin_url)/content/(path)/

  - GET /browse/origin/(origin_url)/directory/(path)/

  - GET /browse/origin/(origin_url)/visit/(timestamp)/branches/

  - GET /browse/origin/(origin_url)/visit/(timestamp)/content/(path)/

  - GET /browse/origin/(origin_url)/visit/(timestamp)/directory/(path)/

  - GET /browse/origin/(origin_url)/visit/(timestamp)/log/

  - GET /browse/origin/(origin_url)/visit/(timestamp)/releases/

  - GET /browse/snapshot/(snapshot_id)/content/(path)/

  - GET /browse/snapshot/(snapshot_id)/directory/(path)/

Replace their use by providing timestamp and path as query parameters to these endpoints
for consistency:

  - GET /browse/origin/(origin_url)/content/

  - GET /browse/origin/(origin_url)/directory/

  - GET /browse/origin/(origin_url)/log/

  - GET /browse/origin/(origin_url)/branches/

  - GET /browse/origin/(origin_url)/releases/

  - GET /browse/snapshot/(snapshot_id)/content/

  - GET /browse/snapshot/(snapshot_id)/directory/

Update endpoints documentation to reflect these changes.

Closes T2115
Closes T2135

That message can only be displayed when browsing a directory in a snapshot
context, for instance when browsing a branch whith a non resolvable revision.

Related to T2353

Slightly refactor and improve the swh.web.browse.snapshot_context module:

  - merge _process_snapshot_request function into get_snapshot_context one

  - rename some dict keys and add snapshot / origin related type annotations

  - cleanup and simplify get_snapshot_context implementation

  - update some docstrings

  - add new exhaustive tests for get_snapshot_context function

Closes T2360

When no timestamp or visit id is provided to the get_origin_visit function,
return the first visit with a non null snapshot instead of the first full
visit. Indeed, a partial visit can have a valid snapshot and should be not
filtered out.

Fix the numerous "'WSGIRequest' object has no attribute 'user'" error
reported in production.

Related to T2367

Notably upgrade jQuery to 3.5 and use recommended dompurify option.

Split the test_origin_request_errors pita test into multiple smaller ones,
use hypothesis and remove some no more needed mocks.

Related to T2360

A new major version of MathJax typesetter has been recently released which
now enables to properly bundle the library with webpack.

So remove previous CDN use to get MathJax and use a self hosted version from
now on.

Closes T1680

- reformat the whole swh-web Python codebase using black tool

- add pre-commit hook to run black on all changed files

- update flake8 configuration to match black code style

- remove a lot of useless '# noqa' comments after new formatting

- add black processing in tox

Django 2.2 is now the version used in production so let's gain some tests
execution time by removing the django 1.11 build when using tox.

When an access token has expired, try to perform a silent OIDC session
refresh through the use of a Django middleware.

Closes T2267

Related to T2342

Related to T2342

Related to T2342

When browsing a release targetting a revision, also add a link to associated
directory view.

Since version 5.6, hypothesis warns on `@given` + function-scoped fixtures.
So turns concerned swh-web fixtures from function-scoped to session-scoped
(there is strictly no difference in tests execution result after that change)
and ignore some warnings related to external function-scoped fixtures that
are safe to use with @given (client from pytest-django and mocker from
pytest-mock).

When a snapshot contains a branch or a release alias, the display of pagination
links in the branches / releases view could be missing due to an invalid test
in the branches/releases view implementation.

Set sidebar state (collapsed / expanded) once css animation has finished
in order to make associated cypress test reliable.

Also set "enableRemember" option from adminlte PushMenu and remove custom
code that was doing the same operation as it is not needed anymore
(see https://adminlte.io/docs/3.0/javascript/push-menu.html).

Closes T2341

There's a python file with invalid syntax in there, which confuses it

No need to query the userinfo endpoint of the OIDC server when authenticating
as those information can also be found in the decoded access token.

Use more reliable access token expiration date.

Check groups claim is provided in decoded token before trying to read it.