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;;; ledger-init.el --- Helper code for use with the "ledger" command-line tool -*- lexical-binding: t; -*-
;; Copyright (C) 2003-2016 John Wiegley (johnw AT gnu DOT org)
;; This file is not part of GNU Emacs.
;; This 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 2, or (at your option) any later
;; version.
;;
;; This 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
;; MA 02110-1301 USA.
;;; Commentary:
;; Determine the ledger environment
(require 'ledger-regex)
;;; Code:
(defcustom ledger-init-file-name "~/.ledgerrc"
"Location of the ledger initialization file. nil if you don't have one."
:type 'file
:group 'ledger-exec)
(defvar ledger-environment-alist nil
"Variable to hold details about ledger-mode's environment.
Adding the dotted pair (\"decimal-comma\" . t) will tell ledger
to treat commas as decimal separator.")
(defcustom ledger-default-date-format "%Y/%m/%d"
"The date format that ledger uses throughout.
Set this to the value of `ledger-iso-date-format' if you prefer
ISO 8601 dates."
:type 'string
:group 'ledger)
(defconst ledger-iso-date-format "%Y-%m-%d"
"The format for ISO 8601 dates.")
(defun ledger-format-date (&optional date)
"Format DATE according to the current preferred date format.
Returns the current date if DATE is nil or not supplied."
(format-time-string
(or (cdr (assoc "date-format" ledger-environment-alist))
ledger-default-date-format)
date))
(defun ledger-init-parse-initialization (buffer)
"Parse the .ledgerrc file in BUFFER."
(with-current-buffer buffer
(let (environment-alist)
(goto-char (point-min))
(while (re-search-forward ledger-init-string-regex nil t )
(let ((matchb (match-beginning 0)) ;; save the match data, string-match stamp on it
(matche (match-end 0)))
(end-of-line)
(setq environment-alist
(append environment-alist
(list (cons (let ((flag (buffer-substring-no-properties (+ 2 matchb) matche)))
(if (string-match "[ \t\n\r]+\\'" flag)
(replace-match "" t t flag)
flag))
(let ((value (buffer-substring-no-properties matche (point) )))
(if (> (length value) 0)
value
t))))))))
environment-alist)))
(defun ledger-init-load-init-file ()
"Load and parse the .ledgerrc file."
(interactive)
(let ((init-base-name (file-name-nondirectory ledger-init-file-name)))
(if (get-buffer init-base-name) ;; init file already loaded, parse it and leave it
(setq ledger-environment-alist
(ledger-init-parse-initialization init-base-name))
(when (and ledger-init-file-name
(file-exists-p ledger-init-file-name)
(file-readable-p ledger-init-file-name))
(let ((init-buffer (find-file-noselect ledger-init-file-name)))
(setq ledger-environment-alist
(ledger-init-parse-initialization init-buffer))
(kill-buffer init-buffer))))))
(provide 'ledger-init)
;;; ledger-init.el ends here
|
