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Diffstat (limited to 'elpa/org-9.5.2/ob-comint.el')
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diff --git a/elpa/org-9.5.2/ob-comint.el b/elpa/org-9.5.2/ob-comint.el new file mode 100644 index 0000000..20ae76f --- /dev/null +++ b/elpa/org-9.5.2/ob-comint.el @@ -0,0 +1,312 @@ +;;; ob-comint.el --- Babel Functions for Interaction with Comint Buffers -*- lexical-binding: t; -*- + +;; Copyright (C) 2009-2021 Free Software Foundation, Inc. + +;; Author: Eric Schulte +;; Keywords: literate programming, reproducible research, comint +;; Homepage: https://orgmode.org + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software: you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation, either version 3 of the License, or +;; (at your option) any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. + +;;; Commentary: + +;; These functions build on comint to ease the sending and receiving +;; of commands and results from comint buffers. + +;; Note that the buffers in this file are analogous to sessions in +;; org-babel at large. + +;;; Code: +(require 'ob-core) +(require 'org-compat) +(require 'comint) + +(defun org-babel-comint-buffer-livep (buffer) + "Check if BUFFER is a comint buffer with a live process." + (let ((buffer (when buffer (get-buffer buffer)))) + (and buffer (buffer-live-p buffer) (get-buffer-process buffer) buffer))) + +(defmacro org-babel-comint-in-buffer (buffer &rest body) + "Check BUFFER and execute BODY. +BUFFER is checked with `org-babel-comint-buffer-livep'. BODY is +executed inside the protection of `save-excursion' and +`save-match-data'." + (declare (indent 1) (debug t)) + `(progn + (unless (org-babel-comint-buffer-livep ,buffer) + (error "Buffer %s does not exist or has no process" ,buffer)) + (save-match-data + (with-current-buffer ,buffer + (save-excursion + (let ((comint-input-filter (lambda (_input) nil))) + ,@body)))))) + +(defmacro org-babel-comint-with-output (meta &rest body) + "Evaluate BODY in BUFFER and return process output. +Will wait until EOE-INDICATOR appears in the output, then return +all process output. If REMOVE-ECHO and FULL-BODY are present and +non-nil, then strip echo'd body from the returned output. META +should be a list containing the following where the last two +elements are optional. + + (BUFFER EOE-INDICATOR REMOVE-ECHO FULL-BODY) + +This macro ensures that the filter is removed in case of an error +or user `keyboard-quit' during execution of body." + (declare (indent 1) (debug (sexp body))) + (let ((buffer (nth 0 meta)) + (eoe-indicator (nth 1 meta)) + (remove-echo (nth 2 meta)) + (full-body (nth 3 meta))) + `(org-babel-comint-in-buffer ,buffer + (let* ((string-buffer "") + (comint-output-filter-functions + (cons (lambda (text) (setq string-buffer (concat string-buffer text))) + comint-output-filter-functions)) + dangling-text) + ;; got located, and save dangling text + (goto-char (process-mark (get-buffer-process (current-buffer)))) + (let ((start (point)) + (end (point-max))) + (setq dangling-text (buffer-substring start end)) + (delete-region start end)) + ;; pass FULL-BODY to process + ,@body + ;; wait for end-of-evaluation indicator + (while (progn + (goto-char comint-last-input-end) + (not (save-excursion + (and (re-search-forward + (regexp-quote ,eoe-indicator) nil t) + (re-search-forward + comint-prompt-regexp nil t))))) + (accept-process-output (get-buffer-process (current-buffer)))) + ;; replace cut dangling text + (goto-char (process-mark (get-buffer-process (current-buffer)))) + (insert dangling-text) + + ;; remove echo'd FULL-BODY from input + (when (and ,remove-echo ,full-body + (string-match + (replace-regexp-in-string + "\n" "[\r\n]+" (regexp-quote (or ,full-body ""))) + string-buffer)) + (setq string-buffer (substring string-buffer (match-end 0)))) + (split-string string-buffer comint-prompt-regexp))))) + +(defun org-babel-comint-input-command (buffer cmd) + "Pass CMD to BUFFER. +The input will not be echoed." + (org-babel-comint-in-buffer buffer + (goto-char (process-mark (get-buffer-process buffer))) + (insert cmd) + (comint-send-input) + (org-babel-comint-wait-for-output buffer))) + +(defun org-babel-comint-wait-for-output (buffer) + "Wait until output arrives from BUFFER. +Note: this is only safe when waiting for the result of a single +statement (not large blocks of code)." + (org-babel-comint-in-buffer buffer + (while (progn + (goto-char comint-last-input-end) + (not (and (re-search-forward comint-prompt-regexp nil t) + (goto-char (match-beginning 0)) + (string= (face-name (face-at-point)) + "comint-highlight-prompt")))) + (accept-process-output (get-buffer-process buffer))))) + +(defun org-babel-comint-eval-invisibly-and-wait-for-file + (buffer file string &optional period) + "Evaluate STRING in BUFFER invisibly. +Don't return until FILE exists. Code in STRING must ensure that +FILE exists at end of evaluation." + (unless (org-babel-comint-buffer-livep buffer) + (error "Buffer %s does not exist or has no process" buffer)) + (when (file-exists-p file) (delete-file file)) + (process-send-string + (get-buffer-process buffer) + (if (= (aref string (1- (length string))) ?\n) string (concat string "\n"))) + (while (not (file-exists-p file)) (sit-for (or period 0.25)))) + + +;;; Async evaluation + +(defvar-local org-babel-comint-async-indicator nil + "Regular expression that `org-babel-comint-async-filter' scans for. +It should have 2 parenthesized expressions, +e.g. \"org_babel_async_\\(start\\|end\\|file\\)_\\(.*\\)\". The +first parenthesized expression determines whether the token is +delimiting a result block, or whether the result is in a file. +If delimiting a block, the second expression gives a UUID for the +location to insert the result. Otherwise, the result is in a tmp +file, and the second expression gives the file name.") + +(defvar-local org-babel-comint-async-buffers nil + "List of Org mode buffers to check for Babel async output results.") + +(defvar-local org-babel-comint-async-file-callback nil + "Callback to clean and insert Babel async results from a temp file. +The callback function takes two arguments: the alist of params of the Babel +source block, and the name of the temp file.") + +(defvar-local org-babel-comint-async-chunk-callback nil + "Callback function to clean Babel async output results before insertion. +Its single argument is a string consisting of output from the +comint process. It should return a string that will be be passed +to `org-babel-insert-result'.") + +(defvar-local org-babel-comint-async-dangling nil + "Dangling piece of the last process output, in case +`org-babel-comint-async-indicator' is spread across multiple +comint outputs due to buffering.") + +(defun org-babel-comint-use-async (params) + "Determine whether to use session async evaluation. +PARAMS are the header arguments as passed to +`org-babel-execute:lang'." + (let ((async (assq :async params)) + (session (assq :session params))) + (and async + (not org-babel-exp-reference-buffer) + (not (equal (cdr async) "no")) + (not (equal (cdr session) "none"))))) + +(defun org-babel-comint-async-filter (string) + "Captures Babel async output from comint buffer back to Org mode buffers. +This function is added as a hook to `comint-output-filter-functions'. +STRING contains the output originally inserted into the comint buffer." + ;; Remove outdated Org mode buffers + (setq org-babel-comint-async-buffers + (cl-loop for buf in org-babel-comint-async-buffers + if (buffer-live-p buf) + collect buf)) + (let* ((indicator org-babel-comint-async-indicator) + (org-buffers org-babel-comint-async-buffers) + (file-callback org-babel-comint-async-file-callback) + (combined-string (concat org-babel-comint-async-dangling string)) + (new-dangling combined-string) + ;; list of UUID's matched by `org-babel-comint-async-indicator' + uuid-list) + (with-temp-buffer + (insert combined-string) + (goto-char (point-min)) + (while (re-search-forward indicator nil t) + ;; update dangling + (setq new-dangling (buffer-substring (point) (point-max))) + (cond ((equal (match-string 1) "end") + ;; save UUID for insertion later + (push (match-string 2) uuid-list)) + ((equal (match-string 1) "file") + ;; insert results from tmp-file + (let ((tmp-file (match-string 2))) + (cl-loop for buf in org-buffers + until + (with-current-buffer buf + (save-excursion + (goto-char (point-min)) + (when (search-forward tmp-file nil t) + (org-babel-previous-src-block) + (let* ((info (org-babel-get-src-block-info)) + (params (nth 2 info)) + (result-params + (cdr (assq :result-params params)))) + (org-babel-insert-result + (funcall file-callback + (nth + 2 (org-babel-get-src-block-info)) + tmp-file) + result-params info)) + t)))))))) + ;; Truncate dangling to only the most recent output + (when (> (length new-dangling) (length string)) + (setq new-dangling string))) + (setq-local org-babel-comint-async-dangling new-dangling) + (when uuid-list + ;; Search for results in the comint buffer + (save-excursion + (goto-char (point-max)) + (while uuid-list + (re-search-backward indicator) + (when (equal (match-string 1) "end") + (let* ((uuid (match-string-no-properties 2)) + (res-str-raw + (buffer-substring + ;; move point to beginning of indicator + (- (match-beginning 0) 1) + ;; find the matching start indicator + (cl-loop + do (re-search-backward indicator) + until (and (equal (match-string 1) "start") + (equal (match-string 2) uuid)) + finally return (+ 1 (match-end 0))))) + ;; Apply callback to clean up the result + (res-str (funcall org-babel-comint-async-chunk-callback + res-str-raw))) + ;; Search for uuid in associated org-buffers to insert results + (cl-loop for buf in org-buffers + until (with-current-buffer buf + (save-excursion + (goto-char (point-min)) + (when (search-forward uuid nil t) + (org-babel-previous-src-block) + (let* ((info (org-babel-get-src-block-info)) + (params (nth 2 info)) + (result-params + (cdr (assq :result-params params)))) + (org-babel-insert-result + res-str result-params info)) + t)))) + ;; Remove uuid from the list to search for + (setq uuid-list (delete uuid uuid-list))))))))) + +(defun org-babel-comint-async-register + (session-buffer org-buffer indicator-regexp + chunk-callback file-callback) + "Set local org-babel-comint-async variables in SESSION-BUFFER. +ORG-BUFFER is added to `org-babel-comint-async-buffers' if not +present. `org-babel-comint-async-indicator', +`org-babel-comint-async-chunk-callback', and +`org-babel-comint-async-file-callback' are set to +INDICATOR-REGEXP, CHUNK-CALLBACK, and FILE-CALLBACK +respectively." + (org-babel-comint-in-buffer session-buffer + (setq org-babel-comint-async-indicator indicator-regexp + org-babel-comint-async-chunk-callback chunk-callback + org-babel-comint-async-file-callback file-callback) + (unless (memq org-buffer org-babel-comint-async-buffers) + (setq org-babel-comint-async-buffers + (cons org-buffer org-babel-comint-async-buffers))) + (add-hook 'comint-output-filter-functions + 'org-babel-comint-async-filter nil t))) + +(defmacro org-babel-comint-async-delete-dangling-and-eval + (session-buffer &rest body) + "Remove dangling text in SESSION-BUFFER and evaluate BODY. +This is analogous to `org-babel-comint-with-output', but meant +for asynchronous output, and much shorter because inserting the +result is delegated to `org-babel-comint-async-filter'." + (declare (indent 1) (debug t)) + `(org-babel-comint-in-buffer ,session-buffer + (goto-char (process-mark (get-buffer-process (current-buffer)))) + (delete-region (point) (point-max)) + ,@body)) + +(provide 'ob-comint) + + + +;;; ob-comint.el ends here |