ob-hledger.el (2714B)
1 ;;; ob-hledger.el --- Babel Functions for hledger -*- lexical-binding: t; -*- 2 3 ;; Copyright (C) 2010-2021 Free Software Foundation, Inc. 4 5 ;; Author: Simon Michael 6 ;; Keywords: literate programming, reproducible research, plain text accounting 7 ;; Homepage: https://git.sr.ht/~bzg/org-contrib 8 9 ;; This file is not part of GNU Emacs. 10 11 ;; GNU Emacs is free software: you can redistribute it and/or modify 12 ;; it under the terms of the GNU General Public License as published by 13 ;; the Free Software Foundation, either version 3 of the License, or 14 ;; (at your option) any later version. 15 16 ;; GNU Emacs is distributed in the hope that it will be useful, 17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 ;; GNU General Public License for more details. 20 21 ;; You should have received a copy of the GNU General Public License 22 ;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. 23 24 ;;; Commentary: 25 26 ;; Babel support for evaluating hledger entries. 27 ;; 28 ;; Based on ob-ledger.el. 29 ;; If the source block is empty, hledger will use a default journal file, 30 ;; probably ~/.hledger.journal (it may not notice your $LEDGER_FILE env var). 31 ;; So make ~/.hledger.journal a symbolic link to the real file if necessary. 32 33 ;; TODO Unit tests are more than welcome, too. 34 35 ;;; Code: 36 (require 'ob) 37 38 (defvar org-babel-default-header-args:hledger 39 '((:results . "output") (:exports . "results") (:cmdline . "bal")) 40 "Default arguments to use when evaluating a hledger source block.") 41 42 (defun org-babel-execute:hledger (body params) 43 "Execute a block of hledger entries with org-babel. 44 This function is called by `org-babel-execute-src-block'." 45 (message "executing hledger source code block") 46 (letrec ( ;(result-params (split-string (or (cdr (assq :results params)) ""))) 47 (cmdline (cdr (assq :cmdline params))) 48 (in-file (org-babel-temp-file "hledger-")) 49 (out-file (org-babel-temp-file "hledger-output-")) 50 (hledgercmd (concat "hledger" 51 (if (> (length body) 0) 52 (concat " -f " (org-babel-process-file-name in-file)) 53 "") 54 " " cmdline))) 55 (with-temp-file in-file (insert body)) 56 ;; TODO This is calling for some refactoring: 57 ;; (concat "hledger" (if ...) " " cmdline) 58 ;; could be built only once and bound to a symbol. 59 (message "%s" hledgercmd) 60 (with-output-to-string 61 (shell-command (concat hledgercmd " > " (org-babel-process-file-name out-file)))) 62 (with-temp-buffer (insert-file-contents out-file) (buffer-string)))) 63 64 (defun org-babel-prep-session:hledger (_session _params) 65 (error "hledger does not support sessions")) 66 67 (provide 'ob-hledger) 68 69 ;;; ob-hledger.el ends here