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ob-emacs-lisp.el
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ob-emacs-lisp.el
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;;; ob-emacs-lisp.el --- Babel Functions for Emacs-lisp Code -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2024 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; URL: 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:
;; Org-Babel support for evaluating emacs-lisp code
;;; Code:
(require 'org-macs)
(org-assert-version)
(require 'ob-core)
(declare-function org-babel--get-vars "ob" (params))
(declare-function org-babel-result-cond "ob" (result-params scalar-form &rest table-forms))
(declare-function org-babel-reassemble-table "ob" (table colnames rownames))
(declare-function org-babel-pick-name "ob" (names selector))
(defconst org-babel-header-args:emacs-lisp '((lexical . :any))
"Emacs-lisp specific header arguments.")
(defvar org-babel-default-header-args:emacs-lisp '((:lexical . "no"))
"Default arguments for evaluating an emacs-lisp source block.
A value of \"yes\" or t causes source blocks to be eval'd using
lexical scoping. It can also be an alist mapping symbols to
their value. It is used both as the optional LEXICAL argument to
`eval', and as the value for `lexical-binding' in buffers created
by `org-edit-src-code'.")
(defun org-babel-expand-body:emacs-lisp (body params)
"Expand BODY according to PARAMS, return the expanded body."
(let ((vars (org-babel--get-vars params))
(print-level nil)
(print-length nil)
(prologue (cdr (assq :prologue params)))
(epilogue (cdr (assq :epilogue params))))
(if (null vars) (concat body "\n")
(format "(let (%s)\n%s%s%s\n)"
(mapconcat
(lambda (var)
(format "%S" `(,(car var) ',(cdr var))))
vars "\n ")
(if prologue (concat prologue "\n ") "")
body
(if epilogue (concat "\n " epilogue "\n") "")))))
(defun org-babel-execute:emacs-lisp (body params)
"Execute emacs-lisp code BODY according to PARAMS."
(let* ((lexical (cdr (assq :lexical params)))
(session (cdr (assq :session params)))
(result-params (cdr (assq :result-params params)))
(body (format (if (member "output" result-params)
"(with-output-to-string %s\n)"
"(progn %s\n)")
(org-babel-expand-body:emacs-lisp body params)))
(result (eval (read (if (or (member "code" result-params)
(member "pp" result-params))
(concat "(pp " body ")")
body))
(org-babel-emacs-lisp-lexical lexical))))
(when (and session (not (equal session "none")))
(error "ob-emacs-lisp backend does not support sessions"))
(org-babel-result-cond result-params
(let ((print-level nil)
(print-length nil))
(if (or (member "scalar" result-params)
(member "verbatim" result-params))
(format "%S" result)
(format "%s" result)))
(org-babel-reassemble-table
result
(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)))))))
(defun org-babel-emacs-lisp-lexical (lexical)
"Interpret :lexical source block argument.
Convert LEXICAL into the form appropriate for `lexical-binding'
and the LEXICAL argument to `eval'."
(if (listp lexical)
lexical
(not (null (member lexical '("yes" "t"))))))
(defun org-babel-edit-prep:emacs-lisp (info)
"Set `lexical-binding' in Org edit buffer.
Set `lexical-binding' in Org edit buffer according to the
corresponding :lexical source block argument provide in the INFO
channel, as returned by `org-babel-get-src-block-info'."
(setq lexical-binding
(org-babel-emacs-lisp-lexical
(org-babel-read
(cdr (assq :lexical (nth 2 info)))))))
(defun org-babel-prep-session:emacs-lisp (_session _params)
"Return an error because we do not support sessions."
(error "ob-emacs-lisp backend does not support sessions"))
(org-babel-make-language-alias "elisp" "emacs-lisp")
(provide 'ob-emacs-lisp)
;;; ob-emacs-lisp.el ends here