mirror of
https://github.com/vale981/emacs-ipython-notebook
synced 2025-03-06 09:31:39 -05:00
566 lines
20 KiB
EmacsLisp
566 lines
20 KiB
EmacsLisp
;;; ein-kernel.el --- Communicate with IPython notebook server
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;; Copyright (C) 2012- Takafumi Arakaki
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;; Author: Takafumi Arakaki
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;; This file is NOT part of GNU Emacs.
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;; ein-kernel.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-kernel.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-kernel.el. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'ein-log)
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(require 'ein-utils)
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(require 'ein-websocket)
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(require 'ein-events)
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(require 'ein-query)
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(defstruct ein:$kernel
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"Hold kernel variables.
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`ein:$kernel-url-or-port'
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URL or port of IPython server.
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FIXME: document other slots."
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url-or-port
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events
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kernel-id
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shell-channel
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iopub-channel
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base-url
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kernel-url
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ws-url
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running
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username
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session-id
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msg-callbacks
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after-start-hook
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after-execute-hook
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kernelinfo)
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(defstruct ein:$kernelinfo
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"Info related (but unimportant) to kernel
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`ein:$kernelinfo-buffer'
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Notebook buffer that the kernel associated with.
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`ein:$kernelinfo-hostname'
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Host name of the machine where the kernel is running on.
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`ein:$kernelinfo-ccwd'
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cached CWD (last time checked CWD)."
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buffer
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hostname
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ccwd)
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;;; Initialization and connection.
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(defun ein:kernel-new (url-or-port base-url events)
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(make-ein:$kernel
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:url-or-port url-or-port
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:events events
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:kernel-id nil
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:shell-channel nil
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:iopub-channel nil
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:base-url base-url
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:running nil
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:username "username"
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:session-id (ein:utils-uuid)
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:msg-callbacks (make-hash-table :test 'equal)
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:kernelinfo (make-ein:$kernelinfo)))
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(defun ein:kernel-del (kernel)
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"Destructor for `ein:$kernel'."
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(ein:kernel-stop-channels kernel))
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(defun ein:kernel--get-msg (kernel msg-type content)
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(list
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:header (list
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:msg_id (ein:utils-uuid)
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:username (ein:$kernel-username kernel)
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:session (ein:$kernel-session-id kernel)
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:msg_type msg-type)
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:content content
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:parent_header (make-hash-table)))
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(defun ein:kernel-start (kernel notebook-id)
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"Start kernel of the notebook whose id is NOTEBOOK-ID."
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(unless (ein:$kernel-running kernel)
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(ein:query-ajax
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(concat (ein:url (ein:$kernel-url-or-port kernel)
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(ein:$kernel-base-url kernel))
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"?" (format "notebook=%s" notebook-id))
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:type "POST"
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:parser #'ein:json-read
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:success (cons #'ein:kernel--kernel-started kernel))))
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(defun ein:kernel-restart (kernel)
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(ein:events-trigger (ein:$kernel-events kernel)
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'(status_restarting . Kernel))
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(ein:log 'info "Restarting kernel")
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(when (ein:$kernel-running kernel)
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(ein:kernel-stop-channels kernel)
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(ein:query-ajax
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(ein:url (ein:$kernel-url-or-port kernel)
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(ein:$kernel-kernel-url kernel)
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"restart")
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:type "POST"
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:parser #'ein:json-read
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:success (cons #'ein:kernel--kernel-started kernel))))
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(defun* ein:kernel--kernel-started (kernel &key data &allow-other-keys)
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(ein:log 'info "Kernel started: %s" (plist-get data :kernel_id))
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(setf (ein:$kernel-running kernel) t)
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(setf (ein:$kernel-kernel-id kernel) (plist-get data :kernel_id))
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(setf (ein:$kernel-ws-url kernel) (plist-get data :ws_url))
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(setf (ein:$kernel-kernel-url kernel)
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(concat (ein:$kernel-base-url kernel) "/"
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(ein:$kernel-kernel-id kernel)))
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(ein:kernel-start-channels kernel)
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(let ((shell-channel (ein:$kernel-shell-channel kernel))
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(iopub-channel (ein:$kernel-iopub-channel kernel)))
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;; FIXME: get rid of lexical-let
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(lexical-let ((kernel kernel))
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(setf (ein:$websocket-onmessage shell-channel)
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(lambda (packet)
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(ein:kernel--handle-shell-reply kernel packet)))
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(setf (ein:$websocket-onmessage iopub-channel)
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(lambda (packet)
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(ein:kernel--handle-iopub-reply kernel packet))))))
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(defun ein:kernel--websocket-closed (kernel ws-url early)
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;; FIXME: `message' is not good choice for showing multiple line
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;; message. I should implement ein-pager.el first and show the
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;; message using its function.
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(if early
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(ein:log 'warn
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"Websocket connection to %s could not be established. \
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You will NOT be able to run code. \
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Your websocket.el may not be compatible with the websocket version in \
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the server, or if the url does not look right, there could be an \
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error in the server's configuration." ws-url)
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(ein:log 'warn "Websocket connection closed unexpectedly. \
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The kernel will no longer be responsive.")))
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(defun ein:kernel-send-cookie (channel)
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;; This is required to open channel. In IPython's kernel.js, it sends
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;; `document.cookie'. This is an empty string anyway.
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(ein:websocket-send channel ""))
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(defun ein:kernel--ws-closed-callback (websocket kernel arg)
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;; NOTE: The argument ARG should not be "unpacked" using `&rest'.
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;; It must be given as a list to hold state `already-called-onclose'
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;; so it can be modified in this function.
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(destructuring-bind (&key already-called-onclose ws-url early)
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arg
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(unless already-called-onclose
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(plist-put arg :already-called-onclose t)
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(unless (ein:$websocket-closed-by-client websocket)
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;; Use "event-was-clean" when it is implemented in websocket.el.
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(ein:kernel--websocket-closed kernel ws-url early)))))
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(defun ein:kernel-start-channels (kernel)
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(ein:kernel-stop-channels kernel)
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(let* ((ws-url (concat (ein:$kernel-ws-url kernel)
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(ein:$kernel-kernel-url kernel)))
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(onclose-arg (list :ws-url ws-url
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:already-called-onclose nil
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:early t)))
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(ein:log 'info "Starting WS: %S" ws-url)
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(setf (ein:$kernel-shell-channel kernel)
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(ein:websocket (concat ws-url "/shell")))
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(setf (ein:$kernel-iopub-channel kernel)
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(ein:websocket (concat ws-url "/iopub")))
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(loop for c in (list (ein:$kernel-shell-channel kernel)
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(ein:$kernel-iopub-channel kernel))
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with ready = '(:shell nil :iopub nil)
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for ready-key in '(:shell :iopub)
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do (setf (ein:$websocket-onclose-args c) (list kernel onclose-arg))
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do (setf (ein:$websocket-onopen c)
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(lexical-let ((channel c)
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(ready ready)
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(ready-key ready-key)
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(kernel kernel))
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(lambda ()
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(ein:kernel-send-cookie channel)
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;; run `ein:$kernel-after-start-hook' if both
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;; channels are ready.
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(plist-put ready ready-key t)
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(ein:log 'debug
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"via EIN:$WEBSOCKET-ONOPEN: ready=%S key=%S"
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ready ready-key)
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(if (and (plist-get ready :shell)
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(plist-get ready :iopub))
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(ein:kernel-run-after-start-hook kernel)))))
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do (setf (ein:$websocket-onclose c)
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#'ein:kernel--ws-closed-callback))
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;; switch from early-close to late-close message after 1s
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(run-at-time
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1 nil
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(lambda (onclose-arg)
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(plist-put onclose-arg :early nil)
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(ein:log 'debug "(via run-at-time) onclose-arg changed to: %S"
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onclose-arg))
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onclose-arg)))
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;; NOTE: `onclose-arg' can be accessed as:
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;; (nth 1 (ein:$websocket-onclose-args (ein:$kernel-shell-channel (ein:$notebook-kernel ein:notebook))))
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(defun ein:kernel-run-after-start-hook (kernel)
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(ein:log 'debug "EIN:KERNEL-RUN-AFTER-START-HOOK")
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(mapc #'ein:funcall-packed
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(ein:$kernel-after-start-hook kernel)))
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(defun ein:kernel-stop-channels (kernel)
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(when (ein:$kernel-shell-channel kernel)
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(setf (ein:$websocket-onclose (ein:$kernel-shell-channel kernel)) nil)
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(ein:websocket-close (ein:$kernel-shell-channel kernel))
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(setf (ein:$kernel-shell-channel kernel) nil))
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(when (ein:$kernel-iopub-channel kernel)
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(setf (ein:$websocket-onclose (ein:$kernel-iopub-channel kernel)) nil)
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(ein:websocket-close (ein:$kernel-iopub-channel kernel))
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(setf (ein:$kernel-iopub-channel kernel) nil)))
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(defun ein:kernel-ready-p (kernel)
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(and (ein:websocket-open-p (ein:$kernel-shell-channel kernel))
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(ein:websocket-open-p (ein:$kernel-iopub-channel kernel))))
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(defmacro ein:kernel-if-ready (kernel &rest body)
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"Execute BODY if KERNEL is ready. Warn user otherwise."
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(declare (indent 1))
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`(if (ein:kernel-ready-p ,kernel)
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(progn ,@body)
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(ein:log 'warn "Kernel is not ready yet!")))
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;;; Main public methods
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;; NOTE: The argument CALLBACKS for the following functions is almost
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;; same as the JS implementation in IPython. However, as Emacs
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;; lisp does not support closure, value is "packed" using
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;; `cons': `car' is the actual callback function and `cdr' is
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;; its first argument. It's like using `cons' instead of
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;; `$.proxy'.
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(defun ein:kernel-object-info-request (kernel objname callbacks)
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"Send object info request of OBJNAME to KERNEL.
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When calling this method pass a CALLBACKS structure of the form:
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(:object_info_reply (FUNCTION . ARGUMENT))
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The FUNCTION will be passed the ARGUMENT as the first argument
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and the `content' object of the `object_into_reply' message as
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the second argument.
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`object_into_reply' message is documented here:
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http://ipython.org/ipython-doc/dev/development/messaging.html#object-information
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"
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(assert (ein:kernel-ready-p kernel))
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(when objname
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(let* ((content (list :oname (format "%s" objname)))
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(msg (ein:kernel--get-msg kernel "object_info_request" content))
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(msg-id (plist-get (plist-get msg :header) :msg_id)))
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(ein:websocket-send
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(ein:$kernel-shell-channel kernel)
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(json-encode msg))
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(ein:kernel-set-callbacks-for-msg kernel msg-id callbacks)
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msg-id)))
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(defun* ein:kernel-execute (kernel code &optional callbacks
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&key
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(silent t)
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(user-variables [])
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(user-expressions (make-hash-table))
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(allow-stdin json-false))
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"Execute CODE on KERNEL.
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When calling this method pass a CALLBACKS structure of the form:
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(:execute_reply EXECUTE-REPLY-CALLBACK
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:output OUTPUT-CALLBACK
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:clear_output CLEAR-OUTPUT-CALLBACK
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:set_next_input SET-NEXT-INPUT)
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Objects end with -CALLBACK above must pack a FUNCTION and its
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first ARGUMENT in a `cons':
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(FUNCTION . ARGUMENT)
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Call signature of the callbacks:
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Callback `msg_type' Extra arguments Notes
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---------------------- ---------------- --------------------- ------------
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EXECUTE-REPLY-CALLBACK `execute_reply' `content'
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OUTPUT-CALLBACK [#output]_ `msg_type' `content' [#output2]_
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CLEAR-OUTPUT-CALLBACK `clear_output' `content' [#clear]_
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For example, the EXECUTE-REPLY-CALLBACK is called as:
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(`funcall' FUNCTION ARGUMENT CONTENT)
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.. [#output] One of `stream', `display_data', `pyout', `pyerr'.
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.. [#output2] The argument MSG-ID for the FUNCTION is a string.
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.. [#clear]_ Content object has `stdout', `stderr' and `other'
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fields that are booleans.
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`execute_reply' message is documented here:
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http://ipython.org/ipython-doc/dev/development/messaging.html#execute
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Output type messages is documented here:
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http://ipython.org/ipython-doc/dev/development/messaging.html#messages-on-the-pub-sub-socket
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The SET-NEXT-INPUT callback will be passed the `set_next_input' payload.
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See `ein:kernel--handle-shell-reply' for how the callbacks are called."
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(assert (ein:kernel-ready-p kernel))
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(let* ((content (list
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:code code
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:silent (or silent json-false)
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:user_variables user-variables
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:user_expressions user-expressions
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:allow_stdin allow-stdin))
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(msg (ein:kernel--get-msg kernel "execute_request" content))
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(msg-id (plist-get (plist-get msg :header) :msg_id)))
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(ein:websocket-send
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(ein:$kernel-shell-channel kernel)
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(json-encode msg))
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(ein:kernel-set-callbacks-for-msg kernel msg-id callbacks)
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(unless silent
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(mapc #'ein:funcall-packed
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(ein:$kernel-after-execute-hook kernel)))
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msg-id))
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(defun ein:kernel-complete (kernel line cursor-pos callbacks)
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"Complete code at CURSOR-POS in a string LINE on KERNEL.
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CURSOR-POS is the position in the string LINE, not in the buffer.
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When calling this method pass a CALLBACKS structure of the form:
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(:complete_reply (FUNCTION . ARGUMENT))
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The FUNCTION will be passed the ARGUMENT as the first argument and
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the `content' object of the `complete_reply' message as the second.
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`complete_reply' message is documented here:
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http://ipython.org/ipython-doc/dev/development/messaging.html#complete
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"
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(assert (ein:kernel-ready-p kernel))
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(let* ((content (list
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:text ""
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:line line
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:cursor_pos cursor-pos))
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(msg (ein:kernel--get-msg kernel "complete_request" content))
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(msg-id (plist-get (plist-get msg :header) :msg_id)))
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(ein:websocket-send
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(ein:$kernel-shell-channel kernel)
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(json-encode msg))
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(ein:kernel-set-callbacks-for-msg kernel msg-id callbacks)
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msg-id))
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(defun ein:kernel-interrupt (kernel)
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(when (ein:$kernel-running kernel)
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(ein:log 'info "Interrupting kernel")
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(ein:query-ajax
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(ein:url (ein:$kernel-url-or-port kernel)
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(ein:$kernel-kernel-url kernel)
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"interrupt")
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:type "POST"
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:success (cons (lambda (&rest ignore)
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(ein:log 'info "Sent interruption command."))
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nil))))
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(defun ein:kernel-kill (kernel)
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(when (ein:$kernel-running kernel)
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(setf (ein:$kernel-running kernel) nil)
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(ein:query-ajax
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(ein:url (ein:$kernel-url-or-port kernel)
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(ein:$kernel-kernel-url kernel))
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:cache nil
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:type "DELETE"
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:success (cons (lambda (&rest ignore)
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(ein:log 'info "Notebook kernel is killed"))
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nil))))
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;; Reply handlers.
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(defun ein:kernel-get-callbacks-for-msg (kernel msg-id)
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(gethash msg-id (ein:$kernel-msg-callbacks kernel)))
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(defun ein:kernel-set-callbacks-for-msg (kernel msg-id callbacks)
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(puthash msg-id callbacks (ein:$kernel-msg-callbacks kernel)))
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(defun ein:kernel--handle-shell-reply (kernel packet)
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(destructuring-bind
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(&key header content parent_header &allow-other-keys)
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(ein:json-read-from-string packet)
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(let* ((msg-type (plist-get header :msg_type))
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(msg-id (plist-get parent_header :msg_id))
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(callbacks (ein:kernel-get-callbacks-for-msg kernel msg-id))
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(cb (plist-get callbacks (intern (format ":%s" msg-type)))))
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(if cb
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(ein:funcall-packed cb content)
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(ein:log 'debug "no callback for: msg_type=%s msg_id=%s"
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msg-type msg-id))
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(ein:aif (plist-get content :payload)
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(ein:kernel--handle-payload kernel callbacks it)))))
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(defun ein:kernel--handle-payload (kernel callbacks payload)
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(loop with events = (ein:$kernel-events kernel)
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for p in payload
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for text = (plist-get p :text)
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for source = (plist-get p :source)
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if (equal source "IPython.zmq.page.page")
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do (when (not (equal (ein:trim text) ""))
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(ein:events-trigger
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events '(open_with_text . Pager) (list :text text)))
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else if
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(equal source "IPython.zmq.zmqshell.ZMQInteractiveShell.set_next_input")
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do (ein:aif (plist-get callbacks :set_next_input)
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(ein:funcall-packed it text))))
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(defun ein:kernel--handle-iopub-reply (kernel packet)
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(destructuring-bind
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(&key content parent_header header &allow-other-keys)
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(ein:json-read-from-string packet)
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(let* ((msg-type (plist-get header :msg_type))
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(callbacks (ein:kernel-get-callbacks-for-msg
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kernel (plist-get parent_header :msg_id)))
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(events (ein:$kernel-events kernel)))
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(ein:log 'debug "HANDLE-IOPUB-REPLY: msg_type = %s" msg-type)
|
||
(if (and (not (equal msg-type "status")) (null callbacks))
|
||
(ein:log 'verbose "Got message not from this kernel.")
|
||
(ein:case-equal msg-type
|
||
(("stream" "display_data" "pyout" "pyerr")
|
||
(ein:aif (plist-get callbacks :output)
|
||
(ein:funcall-packed it msg-type content)))
|
||
(("status")
|
||
(ein:case-equal (plist-get content :execution_state)
|
||
(("busy")
|
||
(ein:events-trigger events '(status_busy . Kernel)))
|
||
(("idle")
|
||
(ein:events-trigger events '(status_idle . Kernel)))
|
||
(("dead")
|
||
(ein:kernel-stop-channels kernel)
|
||
(ein:events-trigger events '(status_dead . Kernel)))))
|
||
(("clear_output")
|
||
(ein:aif (plist-get callbacks :clear_output)
|
||
(ein:funcall-packed it content))))))))
|
||
|
||
|
||
;;; Utility functions
|
||
|
||
(defun ein:kernel-request-stream (kernel code func &optional args)
|
||
(ein:kernel-execute
|
||
kernel
|
||
code
|
||
(list :output (cons (lambda (packed msg-type content)
|
||
(let ((func (car packed))
|
||
(args (cdr packed)))
|
||
(when (equal msg-type "stream")
|
||
(ein:aif (plist-get content :data)
|
||
(apply func it args)))))
|
||
(cons func args)))))
|
||
|
||
(defun ein:kernel-sync-directory (kernel buffer)
|
||
"Sync `default-directory' of BUFFER with cwd of KERNEL.
|
||
When no such directory exists, `default-directory' will not be changed."
|
||
(ein:log 'info "Syncing directory of %s with kernel..." buffer)
|
||
(ein:kernel-request-stream
|
||
kernel
|
||
"__import__('sys').stdout.write(__import__('os').getcwd())"
|
||
(lambda (path buffer)
|
||
(with-current-buffer buffer
|
||
(if (file-accessible-directory-p path)
|
||
(progn
|
||
(setq default-directory path)
|
||
(ein:log 'info
|
||
"Syncing directory of %s with kernel...DONE (%s)"
|
||
buffer path))
|
||
(ein:log 'info
|
||
"Syncing directory of %s with kernel...FAILED (no dir: %s)"
|
||
buffer path))))
|
||
(list buffer)))
|
||
|
||
(defun ein:kernelinfo-init (kernelinfo buffer)
|
||
(setf (ein:$kernelinfo-buffer kernelinfo) buffer))
|
||
|
||
(defun ein:kernelinfo-setup-hooks (kernel)
|
||
"Add `ein:kernelinfo-update-*' to `ein:$kernel-after-*-hook'."
|
||
(push (cons #'ein:kernelinfo-update-all kernel)
|
||
(ein:$kernel-after-start-hook kernel))
|
||
(push (cons #'ein:kernelinfo-update-ccwd kernel)
|
||
(ein:$kernel-after-execute-hook kernel)))
|
||
|
||
(defun ein:kernelinfo-update-all (kernel)
|
||
(ein:log 'debug "EIN:KERNELINFO-UPDATE-ALL")
|
||
(ein:log 'debug "(ein:kernel-ready-p kernel) = %S"
|
||
(ein:kernel-ready-p kernel))
|
||
(ein:kernelinfo-update-ccwd kernel)
|
||
(ein:kernelinfo-update-hostname kernel))
|
||
|
||
(defun ein:kernelinfo-update-ccwd (kernel)
|
||
(ein:kernel-request-stream
|
||
kernel
|
||
"__import__('sys').stdout.write(__import__('os').getcwd())"
|
||
(lambda (cwd kernelinfo buffer)
|
||
(setf (ein:$kernelinfo-ccwd kernelinfo) cwd)
|
||
;; sync buffer's `default-directory' with CWD
|
||
(when (buffer-live-p buffer)
|
||
(with-current-buffer buffer
|
||
(when (file-accessible-directory-p cwd)
|
||
(setq default-directory (file-name-as-directory cwd))))))
|
||
(let ((kernelinfo (ein:$kernel-kernelinfo kernel)))
|
||
(list kernelinfo (ein:$kernelinfo-buffer kernelinfo)))))
|
||
|
||
(defun ein:kernelinfo-update-hostname (kernel)
|
||
(ein:kernel-request-stream
|
||
kernel
|
||
"__import__('sys').stdout.write(__import__('os').uname()[1])"
|
||
(lambda (hostname kernelinfo)
|
||
(setf (ein:$kernelinfo-hostname kernelinfo) hostname))
|
||
(list (ein:$kernel-kernelinfo kernel))))
|
||
|
||
(provide 'ein-kernel)
|
||
|
||
;;; ein-kernel.el ends here
|