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117 lines
3.9 KiB
EmacsLisp
117 lines
3.9 KiB
EmacsLisp
;;; ob-eshell.el --- Babel Functions for Eshell -*- lexical-binding: t; -*-
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;; Copyright (C) 2018-2024 Free Software Foundation, Inc.
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;; Author: stardiviner <numbchild@gmail.com>
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;; Maintainer: stardiviner <numbchild@gmail.com>
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;; URL: https://github.com/stardiviner/ob-eshell
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;; Keywords: literate programming, reproducible research
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org Babel support for evaluating Eshell source code.
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;;; Code:
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(require 'org-macs)
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(org-assert-version)
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(require 'ob)
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(require 'eshell)
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(declare-function eshell-send-input "esh-mode"
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(&optional use-region queue-p no-newline))
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(defvar eshell-last-output-start)
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(defvar eshell-last-output-end)
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(defvar eshell-last-input-end)
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(defvar org-babel-default-header-args:eshell '())
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(defun org-babel-execute:eshell (body params)
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"Execute a block of Eshell code BODY with PARAMS.
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This function is called by `org-babel-execute-src-block'.
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The BODY argument is code which can be executed in Eshell.
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Eshell allows executing normal shell command and Elisp code.
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For more details, see Info node `(eshell) Top'.
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The PARAMS argument is passed to
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`org-babel-expand-body:generic' (which see)."
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(let* ((session (org-babel-eshell-initiate-session
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(cdr (assq :session params))))
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(full-body (org-babel-expand-body:generic
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body params (org-babel-variable-assignments:eshell params))))
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(if session
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(progn
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(with-current-buffer session
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(dolist (line (split-string full-body "\n"))
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(goto-char eshell-last-output-end)
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(insert line)
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(eshell-send-input))
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;; get output of last input
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;; TODO: collect all output instead of last command's output.
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(goto-char eshell-last-input-end)
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(buffer-substring-no-properties (point) eshell-last-output-start)))
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(with-temp-buffer
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(eshell-command full-body t)
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(buffer-string)))))
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(defun org-babel-prep-session:eshell (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(let* ((session (org-babel-eshell-initiate-session session))
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;; Eshell session buffer is read from variable `eshell-buffer-name'.
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(eshell-buffer-name session)
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(var-lines (org-babel-variable-assignments:eshell params)))
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(call-interactively #'eshell)
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(mapc #'eshell-command var-lines)
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session))
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(defun ob-eshell-session-live-p (session)
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"Non-nil if Eshell SESSION exists."
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(get-buffer session))
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(defun org-babel-eshell-initiate-session (&optional session _params)
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"Initiate a session named SESSION."
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(when (and session (not (string= session "none")))
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(save-window-excursion
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(unless (ob-eshell-session-live-p session)
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(let ((eshell-buffer-name session)) (eshell))))
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session))
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(defun org-babel-variable-assignments:eshell (params)
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"Convert ob-eshell variables from PARAMS into Eshell variables assignments."
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(mapcar
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(lambda (pair)
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;; Use `ignore' to suppress value in the command output.
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(format "(ignore (setq %s %S))" (car pair) (cdr pair)))
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(org-babel--get-vars params)))
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(defun org-babel-load-session:eshell (session body params)
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"Load BODY into SESSION with PARAMS."
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(save-window-excursion
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(let ((buffer (org-babel-prep-session:eshell session params)))
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(with-current-buffer buffer
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(goto-char (point-max))
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(insert (org-babel-chomp body)))
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buffer)))
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(provide 'ob-eshell)
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;;; ob-eshell.el ends here
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