[debug] add a new channel events mechanism for debugging

[ctl] allow to specific instance name for instance commands in $CW_INSTANCE Closes #17253994

[cubicweb/utils] add QueryCache.__contains__() to improve dict-like behavior. Closes #255426

[migrations/pdb] add to every failing migration operation a "p(db)" option Instead, the migration command will just crash without offering the possibility of the user to debug or continue the migration. Closes #17219772

[pyramid/ctl] add a new option to activate the debugtoolbar (-t) While this toolbar isn't yet very integrated with CW, it integrates an inline debugging shell like werkzeug for flask or django_extensions which greatly helps debugging on exception. It can already be manually activated by writting "pyramid.includes = pyramid_debugtoolbar" but it's hidden somewhere in the documentation and not very accessible and annoying to do. Closes #17219765

[changelog] add missing information to the 3.27 changelog

Merge 3.26

[debug] add ALL possibility to --dbglevel

[ux] display instance name in suggested upgrade command

[migration/pdb] display traceback instead of only the exception for easier debugging Closes #17219820

[migration/pdb] add option to use pdb.post_mortem if traceback is provided Post mortem is a mode where the pdb shell is opened **where** the exception as occured instead at the breakpoint for set_trace. This is way more useful for debugging for the user because is will have the full context of the error. Closes #17219827

[migration/shell] select ipdb if present on (d)ebug mode Closes #17219833

[mod] move get_pdb to utils.py

Add a migration function in order to relocate bfss Related to https://www.cubicweb.org/ticket/1903304

[pyramid/debug] on every request display request path and selected controller This will display lines like: 2019-06-12 16:26:57 - (cubicweb.pyramid.bwcompat) INFO: REQUEST [view] '/wiki/334037' selected controller <cubicweb.web.views.basecontrollers.ViewController object at 0x7f133802ae90> at /root/.virtualenvs/abreton/local/lib/python2.7/site-packages/cubicweb/web/views/basecontrollers.py:120 2019-06-12 16:26:59 - (cubicweb.pyramid.bwcompat) INFO: REQUEST [data] '/data/ea5eb3b6f89fba0ff4b671093c88d3dd/images/cartouche-mur.jpg' selected controller <cubicweb.web.views.staticcontrollers.DataController object at 0x7f1332a84d50> at /root/.virtualenvs/abreton/local/lib/python2.7/site-packages/cubicweb/web/views/staticcontrollers.py:179 The make debugging easier as this isn't done already. Most other web frameworks do something similar for the developper to be able to understand what is happening right now. Closes #17219741

[logging/debug] move transaction operations logs from self.debug to DBG_OPS There were a mixing between displaying transaction operations log on logger.debug and only when DBG_OPS was on, uniformize everything behind DBG_OPS. Closes #17229126

[debug] syntax highlight SQL and RQL debug output This prevent DBG_RQL and DBG_SQL output to looks like a gigantic blob of white text. Do this only if we detect that we are in a tty and that pygments is installed. Closes #17222885

[logging] send logs by default to stdout Following the move to have commands only working on foreground sending logs to a file by default doesn't make much more sens anymore so send them to stdout by default and add a new option to send them to a file if needed

[cubicweb-ctl] backport --dbglevel option of pyramid to all instance commands Closes #17219653

[cubicweb-ctl] backport --loglevel option of pyramid to all instance commands

[cubicweb-ctl/fix] correctly get exception traceback_ for pdb.post_mortem In python 3 the behavior of sys.exc_info had a very subtle change: - in python 2 you can call if whenever you want after a try/except statement and you'll get information about this last raise - ipython 3, once you get out of try/except, sys.exc_info is cleaned and you'll get (None, None, None) Hardened the test to avoid this error from happening again.

Document mercurial configuration for contributing * how to use master/review repositories * how to send the "Available at" command in patchbomb emails * how to add the "cubicweb" flag in patchbomb emails * how to use our "jenkins" mercurial extension Closes #17243538

Add documentation on workflow permission

Remove undefined function in documentation