;;; ob-ledger.el --- org-babel functions for ledger evaluation ;; Copyright (C) 2010-2012 Free Software Foundation, Inc. ;; Author: Eric S Fraga ;; Keywords: literate programming, reproducible research, accounting ;; Homepage: http://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 <http://www.gnu.org/licenses/>. ;;; Commentary: ;; Org-Babel support for evaluating ledger entries. ;; ;; This differs from most standard languages in that ;; ;; 1) there is no such thing as a "session" in ledger ;; ;; 2) we are generally only going to return output from the ledger program ;; ;; 3) we are adding the "cmdline" header argument ;; ;; 4) there are no variables ;;; Code: (require 'ob) (defvar org-babel-default-header-args:ledger '((:results . "output") (:cmdline . "bal")) "Default arguments to use when evaluating a ledger source block.") (defun org-babel-execute:ledger (body params) "Execute a block of Ledger entries with org-babel. This function is called by `org-babel-execute-src-block'." (message "executing Ledger source code block") (let ((result-params (split-string (or (cdr (assoc :results params)) ""))) (cmdline (cdr (assoc :cmdline params))) (in-file (org-babel-temp-file "ledger-")) (out-file (org-babel-temp-file "ledger-output-"))) (with-temp-file in-file (insert body)) (message "%s" (concat "ledger" " -f " (org-babel-process-file-name in-file) " " cmdline)) (with-output-to-string (shell-command (concat "ledger" " -f " (org-babel-process-file-name in-file) " " cmdline " > " (org-babel-process-file-name out-file)))) (with-temp-buffer (insert-file-contents out-file) (buffer-string)))) (defun org-babel-prep-session:ledger (session params) (error "Ledger does not support sessions")) (provide 'ob-ledger) ;;; ob-ledger.el ends here