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+;;; ob-emacs-lisp.el --- Babel Functions for Emacs-lisp Code -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+;; Author: Eric Schulte
+;; Keywords: literate programming, reproducible research
+;; 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:
+
+;; Org-Babel support for evaluating emacs-lisp code
+
+;;; Code:
+
+(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))
+ (if (null vars) (concat body "\n")
+ (format "(let (%s)\n%s\n)"
+ (mapconcat
+ (lambda (var)
+ (format "%S" (print `(,(car var) ',(cdr var)))))
+ vars "\n ")
+ body))))
+
+(defun org-babel-execute:emacs-lisp (body params)
+ "Execute a block of emacs-lisp code with Babel."
+ (let* ((lexical (cdr (assq :lexical 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))))
+ (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."
+ (setq lexical-binding
+ (org-babel-emacs-lisp-lexical
+ (org-babel-read
+ (cdr (assq :lexical (nth 2 info)))))))
+
+(org-babel-make-language-alias "elisp" "emacs-lisp")
+
+(provide 'ob-emacs-lisp)
+
+;;; ob-emacs-lisp.el ends here