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name: scratch/bba-ob-core-async/my-async-tests.el 	 # note: path name is non-authoritative(*)

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;;; my-async-tests.el --- Scratch/temporary file: some tests about async -*- lexical-binding: t -*-

;; Copyright (C) 2024 Bruno BARBIER

;; Author: Bruno BARBIER
;; Status: Temporary tests.
;; Compatibility: GNU Emacs 30.0.50
;;
;; This file is NOT part of GNU Emacs.

;; This program 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 2 of
;; the License, or (at your option) any later version.

;; This program 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 this program; if not, write to the Free
;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
;; MA 02111-1307 USA

(require 'org)
(require 'org-elib-async)

(defun my-shell-babel-schedule (lang body params handle-feedback)
  "Execute the bash script BODY.
Execute the shell script BODY using bash.  Use HANDLE-FEEDBACK to report
the outcome (success or failure)."
  (unless (equal "bash" lang)
    (error "Only for bash"))
  (funcall handle-feedback (list :pending "started"))
  (org-elib-async-process (list "bash") :input body :callback handle-feedback))


(defun my-org-babel-python-how-to-execute (body params)
  "Return how to execute BODY using python.
Return how to execute, as expected by
`org-elib-async-comint-queue--execution'."
  ;; Code mostly extracted from ob-python, following
  ;; `org-babel-python-evaluate-session'.
  ;; Results are expected to differ from ob-python as we follow the
  ;; same process for all execution paths: asynchronous or not, with
  ;; session or without.
  (let* ((org-babel-python-command
                (or (cdr (assq :python params))
                    org-babel-python-command))
               (session-key (org-babel-python-initiate-session
                                   (cdr (assq :session params))))
               (graphics-file (and (member "graphics" (assq :result-params params))
                                               (org-babel-graphical-output-file params)))
         (result-params (cdr (assq :result-params params)))
         (result-type (cdr (assq :result-type params)))
         (results-file (when (eq 'value result-type)
                         (or graphics-file
                             (org-babel-temp-file "python-"))))
               (return-val (when (eq result-type 'value)
                                   (cdr (assq :return params))))
               (preamble (cdr (assq :preamble params)))
         (full-body
                (concat
                 (org-babel-expand-body:generic
                  body params
                  (org-babel-variable-assignments:python params))
                 (when return-val
                   (format "\n%s" return-val))))
         (post-process
          (lambda (r)
            (setq r (string-trim r))
            (when (string-prefix-p "Traceback (most recent call last):" r)
              (signal 'user-error (list r)))
            (when (eq 'value result-type)
              (setq r (org-babel-eval-read-file results-file)))
            (org-babel-reassemble-table
             (org-babel-result-cond result-params
               r
               (org-babel-python-table-or-string r))
             (org-babel-pick-name (cdr (assq :colname-names params))
                                                    (cdr (assq :colnames params)))
             (org-babel-pick-name (cdr (assq :rowname-names params))
                                                    (cdr (assq :rownames params))))))
         (tmp-src-file (org-babel-temp-file "python-"))
         (session-body
          ;; The real code we evaluate in the session.
          (pcase result-type
                  (`output
                   (format (string-join
                      (list "with open('%s') as f:\n"
                            "    exec(compile(f.read(), f.name, 'exec'))\n"))
                                             (org-babel-process-file-name
                                              tmp-src-file 'noquote)))
            (`value
             ;; FIXME: In this case, any output is an error.
                                           (org-babel-python-format-session-value
                                tmp-src-file results-file result-params))))
         comint-buffer
         finally)


    (unless session-key
      ;; No session. We create a temporary one and use 'finally' to
      ;; destroy it once we are done.
      ;;
      ;; FIXME: This session code should be refactored and moved into
      ;;        ob-core.
      (setq session-key (org-babel-python-initiate-session
                        ;; We can't use a simple `generate-new-buffer'
                        ;; due to the earmuffs game.
                         (org-babel-python-without-earmuffs
                         (format "*ob-python-no-session-%s*" (org-id-uuid)))))
      (setq finally (lambda ()
                      (when-let ((s-buf
                                  (get-buffer (org-babel-python-with-earmuffs session-key))))
                        ;; We cannot delete it immediately as we are called from it.
                        (run-with-idle-timer
                         0.1 nil
                         (lambda ()
                           (when (buffer-live-p s-buf)
                             (let ((kill-buffer-query-functions nil)
                                   (kill-buffer-hook nil))
                               (kill-buffer s-buf)))))))))

    (org-elib-async-comint-queue-init-if-needed session-key)
    (setq comint-buffer
          (get-buffer (org-babel-python-with-earmuffs session-key)))
    (with-temp-file tmp-src-file
      (insert (if (and graphics-file (eq result-type 'output))
                  (format org-babel-python--output-graphics-wrapper
                          full-body graphics-file)
                full-body)))

    (lambda (&rest q)
      (pcase q
        (`(:instrs-to-enter)
         ;; FIXME: This is wrong.
         "import sys; sys.ps1=''; sys.ps2=''")
        (`(:instrs-to-exit))
        (`(:finally) (when finally (funcall finally)))
        (`(:instr-to-emit-tag ,tag) (format "print ('%s')" tag))
        (`(:post-process ,r) (when post-process (funcall post-process r)))
        (`(:send-instrs-to-session ,code)
         ;; See org-babel-python-send-string
         (with-current-buffer comint-buffer
           (let ((python-shell-buffer-name
                        (org-babel-python-without-earmuffs session-key)))
                   (python-shell-send-string (concat code "\n")))))
        (`(:get-code) session-body)
        (`(:get-comint-buffer) comint-buffer)
        (_ (error "Unknown query"))))))



(defun my-org-babel-schedule (lang body params handle-feedback)
  "Schedule the execution of BODY according to PARAMS.
This function is called by `org-babel-execute-src-block'.  Return a
function that waits and returns the result on success, raise on failure."
  (cl-assert (equal "python" lang))
  (let ((exec (my-org-babel-python-how-to-execute body params)))
    (org-elib-async-comint-queue--push exec :handle-feedback handle-feedback)))


(defun my-org-babel-execute (lang body params)
  "Execute Python BODY according to PARAMS.
This function is called by `org-babel-execute-src-block'."
  ;; We just start the asynchronous execution, wait for it, and return
  ;; the result (or raise the exception). No custom code, and,
  ;; synchronous and asynchronous should just mix nicely together.
  (cl-assert (equal "python" lang))
  (funcall (my-org-babel-schedule lang body params nil)))

debug log:

solving 3550fc88f ...
found 3550fc88f in https://yhetil.org/orgmode/65cfa0d8.050a0220.cb569.ce34@mx.google.com/

applying [1/1] https://yhetil.org/orgmode/65cfa0d8.050a0220.cb569.ce34@mx.google.com/
diff --git a/scratch/bba-ob-core-async/my-async-tests.el b/scratch/bba-ob-core-async/my-async-tests.el
new file mode 100644
index 000000000..3550fc88f

Checking patch scratch/bba-ob-core-async/my-async-tests.el...
Applied patch scratch/bba-ob-core-async/my-async-tests.el cleanly.

index at:
100644 3550fc88f7e572f2b00fda8da39e9c12c0c83754	scratch/bba-ob-core-async/my-async-tests.el

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