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+;;; ob-template.el --- org-babel functions for template evaluation  -*- lexical-binding: t; -*-
+
+;; Author: luxbock <luxbock@gmail.com>
+;; Version: 0
+;; URL: https://github.com/museoa/bqn-mode
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;;; Commentary:
+
+;; This package provides org-babel functions for template evaluation
+
+;;; Code:
+
+(require 'ob)
+(require 'ob-ref)
+(require 'ob-comint)
+(require 'ob-eval)
+(require 'bqn-mode)
+;; possibly require modes required for your language
+
+;; optionally define a file extension for this language
+(add-to-list 'org-babel-tangle-lang-exts '("bqn" . "bqn"))
+
+;; optionally declare default header arguments for this language
+(defvar org-babel-default-header-args:bqn '())
+
+;; This function expands the body of a source code block by doing things like
+;; prepending argument definitions to the body, it should be called by the
+;; `org-babel-execute:bqn' function below. Variables get concatenated in
+;; the `mapconcat' form, therefore to change the formatting you can edit the
+;; `format' form.
+(defun org-babel-expand-body:bqn (body params &optional processed-params)
+  "Expand BODY according to PARAMS, return the expanded body."
+  (require 'bqn-mode nil t)
+  (let ((vars (org-babel--get-vars (or processed-params (org-babel-process-params params)))))
+    (concat
+     (mapconcat ;; define any variables
+      (lambda (pair)
+        (format "%s=%S"
+                (car pair) (org-babel-bqn-var-to-bqn (cdr pair))))
+      vars "\n")
+     "\n" body "\n")))
+
+;; This is the main function which is called to evaluate a code
+;; block.
+;;
+;; This function will evaluate the body of the source code and
+;; return the results as emacs-lisp depending on the value of the
+;; :results header argument
+;; - output means that the output to STDOUT will be captured and
+;;   returned
+;; - value means that the value of the last statement in the
+;;   source code block will be returned
+;;
+;; The most common first step in this function is the expansion of the
+;; PARAMS argument using `org-babel-process-params'.
+;;
+;; Please feel free to not implement options which aren't appropriate
+;; for your language (e.g. not all languages support interactive
+;; "session" evaluation).  Also you are free to define any new header
+;; arguments which you feel may be useful -- all header arguments
+;; specified by the user will be available in the PARAMS variable.
+(defun org-babel-execute:bqn (body params)
+  "Execute a block of Bqn code with org-babel.
+This function is called by `org-babel-execute-src-block'"
+  (message "executing BQN source code block")
+  ;; TODO: Add handling of parameters, session, etc.
+  (bqn-comint-evaluate-command body))
+
+;; This function should be used to assign any variables in params in
+;; the context of the session environment.
+(defun org-babel-prep-session:bqn (session params)
+  "Prepare SESSION according to the header arguments specified in PARAMS."
+  )
+
+(defun org-babel-bqn-var-to-bqn (var)
+  "Convert an elisp var into a string of bqn source code
+specifying a var of the same value."
+  (format "%S" var))
+
+(defun org-babel-bqn-table-or-string (results)
+  "If the results look like a table, then convert them into an
+Emacs-lisp table, otherwise return the results as a string."
+  )
+
+(defun org-babel-bqn-initiate-session (&optional session)
+  "If there is not a current inferior-process-buffer in SESSION then create.
+Return the initialized session."
+  (unless (string= session "none")
+    (get-buffer-process (bqn-comint-buffer))))
+
+(provide 'ob-bqn)
+;;; ob-bqn.el ends here