279 lines
12 KiB
EmacsLisp
279 lines
12 KiB
EmacsLisp
;;; ein-jupyter.el --- Manage the jupyter notebook server -*- lexical-binding: t -*-
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;; Copyright (C) 2017 John M. Miller
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;; Authors: John M. Miller <millejoh at mac.com>
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;; This file is NOT part of GNU Emacs.
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;; ein-jupyter.el is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; ein-jupyter.el is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with ein-jupyter.el. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'ein-core)
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(require 'ein-notebooklist)
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(require 'ein-dev)
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(defcustom ein:jupyter-server-buffer-name "*ein:jupyter-server*"
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"The name of the buffer for the jupyter notebook server
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session."
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:group 'ein
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:type 'string)
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(defcustom ein:jupyter-server-run-timeout 60000
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"Time, in milliseconds, to wait for the jupyter server to start before declaring timeout and cancelling the operation."
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:group 'ein
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:type 'integer)
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(defcustom ein:jupyter-server-args '("--no-browser")
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"Add any additional command line options you wish to include
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with the call to the jupyter notebook."
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:group 'ein
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:type '(repeat string))
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(defcustom ein:jupyter-default-notebook-directory nil
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"If you are tired of always being queried for the location of
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the notebook directory, you can set it here for future calls to
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`ein:jupyter-server-start'"
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:group 'ein
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:type '(directory))
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(defvar *ein:jupyter-server-accept-timeout* 60)
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(defvar *ein:jupyter-server-process-name* "EIN: Jupyter notebook server")
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(defvar *ein:last-jupyter-command* nil)
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(defvar *ein:last-jupyter-directory* nil)
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(defcustom ein:jupyter-default-server-command "jupyter"
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"The default command to start a jupyter notebook server.
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Changing this to `jupyter-notebook' requires customizing `ein:jupyter-server-use-subcommand' to nil.
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"
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:group 'ein
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:type '(file)
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:set (lambda (symbol value)
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(set-default symbol value)
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(setq *ein:last-jupyter-command* nil)))
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(defcustom ein:jupyter-server-use-subcommand "notebook"
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"Users of \"jupyter-notebook\" (as opposed to \"jupyter notebook\") need to `Omit'."
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:group 'ein
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:type '(choice (string :tag "Subcommand" "notebook")
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(const :tag "Omit" nil)))
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(defcustom ein:jupyter-default-kernel 'first-alphabetically
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"With which of ${XDG_DATA_HOME}/jupyter/kernels to create new notebooks."
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:group 'ein
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:type (append
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'(choice (other :tag "First alphabetically" first-alphabetically))
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(condition-case err
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(mapcar
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(lambda (x) `(const :tag ,(cdr x) ,(car x)))
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(cl-loop
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for (k . spec) in
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(alist-get
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'kernelspecs
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(let ((json-object-type 'alist))
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(json-read-from-string
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(shell-command-to-string
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(format "%s kernelspec list --json"
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ein:jupyter-default-server-command)))))
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collect `(,k . ,(alist-get 'display_name (alist-get 'spec spec)))))
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(error (ein:log 'warn "ein:jupyter-default-kernel: %s" err)
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'((string :tag "Ask"))))))
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(defsubst ein:jupyter-server-process ()
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"Return the emacs process object of our session"
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(get-buffer-process (get-buffer ein:jupyter-server-buffer-name)))
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(defun ein:jupyter-server--run (buf cmd dir &optional args)
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(when ein:debug
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(add-to-list 'ein:jupyter-server-args "--debug"))
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(unless (stringp dir)
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(error "ein:jupyter-server--run: notebook directory required"))
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(let* ((vargs (append (ein:aif ein:jupyter-server-use-subcommand (list it))
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(list (format "--notebook-dir=%s" (convert-standard-filename dir)))
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args
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ein:jupyter-server-args))
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(proc (apply #'start-process
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*ein:jupyter-server-process-name* buf cmd vargs)))
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(ein:log 'info "ein:jupyter-server--run: %s %s" cmd (ein:join-str " " vargs))
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(set-process-query-on-exit-flag proc nil)
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proc))
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(defun ein:jupyter-server-conn-info (&optional buffer-name)
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"Return the url-or-port and password for BUFFER or the global session."
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(unless buffer-name
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(setq buffer-name ein:jupyter-server-buffer-name))
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(let ((buffer (get-buffer buffer-name))
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(result '(nil nil)))
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(if buffer
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(with-current-buffer buffer
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(save-excursion
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(goto-char (point-max))
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(re-search-backward (format "Process %s" *ein:jupyter-server-process-name*)
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nil "") ;; important if we start-stop-start
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(when (re-search-forward "\\([[:alnum:]]+\\) is\\( now\\)? running" nil t)
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(let ((hub-p (cl-search "jupyterhub" (downcase (match-string 1)))))
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(when (re-search-forward "\\(https?://[^:]*:[0-9]+\\)\\(?:/\\?token=\\([[:alnum:]]+\\)\\)?" nil t)
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(let ((raw-url (match-string 1))
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(token (or (match-string 2) (and (not hub-p) ""))))
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(setq result (list (ein:url raw-url) token)))))))))
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result))
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(defun ein:jupyter-server-login-and-open (&optional callback)
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"Log in and open a notebooklist buffer for a running jupyter notebook server.
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Determine if there is a running jupyter server (started via a
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call to `ein:jupyter-server-start') and then try to guess if
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token authentication is enabled. If a token is found use it to generate a
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call to `ein:notebooklist-login' and once authenticated open the notebooklist buffer
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via a call to `ein:notebooklist-open'."
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(interactive)
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(when (ein:jupyter-server-process)
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(cl-multiple-value-bind (url-or-port _password) (ein:jupyter-server-conn-info)
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(ein:notebooklist-login url-or-port callback))))
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(defsubst ein:set-process-sentinel (proc url-or-port)
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"URL-OR-PORT might get redirected from (ein:jupyter-server-conn-info).
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This is currently only the case for jupyterhub.
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Once login handshake provides the new URL-OR-PORT, we set various state as pertains
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our singleton jupyter server process here."
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;; Would have used `add-function' if it didn't produce gv-ref warnings.
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(set-process-sentinel
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proc
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(apply-partially (lambda (url-or-port* sentinel proc* event)
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(ein:aif sentinel (funcall it proc* event))
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(funcall #'ein:notebooklist-sentinel url-or-port* proc* event))
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url-or-port (process-sentinel proc))))
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;;;###autoload
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(defun ein:jupyter-server-start (server-cmd-path notebook-directory
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&optional no-login-p login-callback port)
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"Start SERVER-CMD_PATH with `--notebook-dir' NOTEBOOK-DIRECTORY. Login after connection established unless NO-LOGIN-P is set. LOGIN-CALLBACK takes two arguments, the buffer created by ein:notebooklist-open--finish, and the url-or-port argument of ein:notebooklist-open*.
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This command opens an asynchronous process running the jupyter
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notebook server and then tries to detect the url and password to
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generate automatic calls to `ein:notebooklist-login' and
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`ein:notebooklist-open'.
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With \\[universal-argument] prefix arg, it will prompt the user for the path to
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the jupyter executable first. Else, it will try to use the
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value of `*ein:last-jupyter-command*' or the value of the
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customizable variable `ein:jupyter-default-server-command'.
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Then it prompts the user for the path of the root directory
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containing the notebooks the user wants to access.
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The buffer named by `ein:jupyter-server-buffer-name' will contain
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the log of the running jupyter server."
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(interactive
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(let* ((default-command (or *ein:last-jupyter-command*
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ein:jupyter-default-server-command))
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(server-cmd-path
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(executable-find (if current-prefix-arg
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(read-file-name "Server command: " default-directory nil nil
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default-command)
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default-command)))
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(notebook-directory
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(read-directory-name "Notebook directory: "
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(or *ein:last-jupyter-directory*
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ein:jupyter-default-notebook-directory))))
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(list server-cmd-path notebook-directory nil #'(lambda (buffer _url-or-port)
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(pop-to-buffer buffer)))))
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(unless (and (stringp server-cmd-path)
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(file-exists-p server-cmd-path)
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(file-executable-p server-cmd-path))
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(error "Command %s not found or not executable"
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(or *ein:last-jupyter-command*
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ein:jupyter-default-server-command)))
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(setf *ein:last-jupyter-command* server-cmd-path
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*ein:last-jupyter-directory* notebook-directory)
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(if (ein:jupyter-server-process)
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(error "Please first M-x ein:stop"))
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(add-hook 'kill-emacs-hook #'(lambda ()
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(ignore-errors (ein:jupyter-server-stop t))))
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(let ((proc (ein:jupyter-server--run ein:jupyter-server-buffer-name
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*ein:last-jupyter-command*
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*ein:last-jupyter-directory*
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(if (numberp port)
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`("--port" ,(format "%s" port)
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"--port-retries" "0")))))
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(when (eql system-type 'windows-nt)
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(accept-process-output proc (/ ein:jupyter-server-run-timeout 1000)))
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(cl-loop repeat 30
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until (car (ein:jupyter-server-conn-info ein:jupyter-server-buffer-name))
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do (sleep-for 0 500)
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finally do
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(unless (car (ein:jupyter-server-conn-info ein:jupyter-server-buffer-name))
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(ein:log 'warn "Jupyter server failed to start, cancelling operation")
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(ein:jupyter-server-stop t)))
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(when (and (not no-login-p) (ein:jupyter-server-process))
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(unless login-callback
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(setq login-callback #'ignore))
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(add-function :after (var login-callback)
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(apply-partially (lambda (proc* _buffer url-or-port)
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(ein:set-process-sentinel proc* url-or-port))
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proc))
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(ein:jupyter-server-login-and-open login-callback))))
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;;;###autoload
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(defalias 'ein:run 'ein:jupyter-server-start)
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;;;###autoload
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(defalias 'ein:stop 'ein:jupyter-server-stop)
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(defun ein:undocumented-shutdown (url-or-port)
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(ein:query-singleton-ajax
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(list 'shutdown-server url-or-port)
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(ein:url url-or-port "api/shutdown")
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:type "POST"
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:timeout 3 ;; content-query-timeout and query-timeout default nil
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:sync t))
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;;;###autoload
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(defun ein:jupyter-server-stop (&optional force log)
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(interactive)
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(ein:and-let* ((url-or-port (car (ein:jupyter-server-conn-info)))
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(ok (or force (y-or-n-p "Stop server and close notebooks?"))))
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(ein:notebook-close-notebooks t)
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(cl-loop repeat 10
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do (ein:query-running-process-table)
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until (zerop (hash-table-count ein:query-running-process-table))
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do (sleep-for 0 500))
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(if (eq system-type 'windows-nt)
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(progn
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(ein:undocumented-shutdown url-or-port)
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(ein:aif (ein:jupyter-server-process)
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(delete-process it)))
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(let* ((proc (ein:jupyter-server-process))
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(pid (process-id proc)))
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(ein:log 'info "Signaled %s with pid %s" proc pid)
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(signal-process pid 15)
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(run-at-time 2 nil
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(lambda ()
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(ein:log 'info "Resignaled %s with pid %s" proc pid)
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(signal-process pid 15)))))
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;; `ein:notebooklist-sentinel' frequently does not trigger
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(ein:notebooklist-list-remove url-or-port)
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(kill-buffer (ein:notebooklist-get-buffer url-or-port))
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(when log
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(with-current-buffer ein:jupyter-server-buffer-name
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(write-region (point-min) (point-max) log)))))
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(provide 'ein-jupyter)
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