Full undo support, including undoing cell actions, is still unstable and can
cause corruption of worksheet data so I am making this an optional feature. See
the variable `ein:worksheet-enable-undo', which by default will be set to nil.
Force a query of available kernelspecs when calling `ein:notebooklist-open'.
Idea is to catch when user installs a new kernelspecs while ein is active.
No default keybinding, but one can now call `ein:tb-show' from an org
buffer using ein source code blocks when one of the blocks generates a
traceback.
EIN should properly handle indentation in the worksheet as it once did long ago.
Issues was that python mode no longer uses the global variables
`python-ident-levels' for tracking ident. Now we advise around
`python-indent--calculate-indentation'. This is an internal function so may not
be the best call, but it works.
If it breaks maybe take a look at advising `python-ident-calculate-indentation'.
Instead of always prompting the user for the path to the jupyter
executable, it will try to use the value of `*ein:last-jupyter-command*' or
the value of the customizable variable `ein:jupyter-default-server-command'
when the `ein:jupyter-server-start` command is called without C-u prefix arg.
As well as going to a non-deferred implementation for
`ein:notebooklist-change-url-port' the code now properly restarts the nb kernel
when changing the server the notebook is running on.
Also a small change to the formatting of the notebooklist buffer.
Not at all sure why, but succesfully starting jupyter and detecting login token
info is sensitive to this factor. On Windows, a call to accept-process-output
prior to the deferred chain also works, but unfortunately seems to cause issues
on some Linux installations.
For the moment a factor of 10 seems to work, but we will see what feedback from
the community is. This may need to be a customizable variable.
Optional argument PROCESS means do not return until output has been
received from PROCESS.
If jupyter notebook is fast enough and made all the outputs, at the
time of invoking accept-process-output will block until timeout.
Revert "ein-jupyter: Try waiting for process output before logging in."
This reverts commit 9cae1ba153.
Some environment can be slow so that even if "The Jupyter Notebook is
running" appears, the notebook URL with token is not available.
Test exactly for the URL.
1. no need to install git explicitly.
2. install emacs before `cask install`, otherwise the cask packages
are installed for system emacs.
3. pip installation as root, otherwise the debug session
travis_run_install hangs with 'Permission Denied'.
Don't think we were handling https:// url's correctly.
Also some code cleanup in ein-connect; fix longstanding bug in ein:load-files,
and tweak default timeout for starting a jupyter session from within emacs.
