36e77bd357
Altered menu creation so that menu functions are disable if there is no ledger executable available command keys will also warn if ledger isn't working remove a debug message from leg-sort
86 lines
3.1 KiB
EmacsLisp
86 lines
3.1 KiB
EmacsLisp
;;; ldg-exec.el --- Helper code for use with the "ledger" command-line tool
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;; Copyright (C) 2003-2013 John Wiegley (johnw AT gnu DOT org)
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;; This file is not part of GNU Emacs.
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;; This is free software; you can redistribute it and/or modify it under
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;; the terms of the GNU General Public License as published by the Free
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;; Software Foundation; either version 2, or (at your option) any later
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;; version.
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;;
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;; This is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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;; for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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;; MA 02111-1307, USA.
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(defconst ledger-version-needed "3.0.0"
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"The version of ledger executable needed for interactive features")
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(defvar ledger-works nil
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"Flag showing whether the ledger binary can support ledger-mode interactive features")
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(defgroup ledger-exec nil
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"Interface to the Ledger command-line accounting program."
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:group 'ledger)
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(defcustom ledger-binary-path "ledger"
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"Path to the ledger executable."
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:type 'file
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:group 'ledger)
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(defun ledger-exec-ledger (input-buffer &optional output-buffer &rest args)
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"Run Ledger."
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(if (null ledger-binary-path)
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(error "The variable `ledger-binary-path' has not been set"))
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(let ((buf (or input-buffer (current-buffer)))
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(outbuf (or output-buffer
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(generate-new-buffer " *ledger-tmp*"))))
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(with-current-buffer buf
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(let ((coding-system-for-write 'utf-8)
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(coding-system-for-read 'utf-8))
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(apply #'call-process-region
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(append (list (point-min) (point-max)
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ledger-binary-path nil outbuf nil "-f" "-")
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args)))
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outbuf)))
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(defun ledger-exec-read (&optional input-buffer &rest args)
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(with-current-buffer
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(apply #'ledger-exec-ledger input-buffer nil "emacs" args)
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(goto-char (point-min))
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(prog1
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(read (current-buffer))
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(kill-buffer (current-buffer)))))
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(defun ledger-version-greater-p (needed)
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"verify the ledger binary is usable for ledger-mode"
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(let ((buffer ledger-buf)
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(version-strings '())
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(version-number))
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(with-temp-buffer
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(ledger-exec-ledger buffer (current-buffer) "--version")
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(goto-char (point-min))
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(delete-horizontal-space)
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(setq version-strings (split-string
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(buffer-substring-no-properties (point)
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(+ (point) 12))))
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(if (and (string-match (regexp-quote "Ledger") (car version-strings))
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(or (string= needed (car (cdr version-strings)))
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(string< needed (car (cdr version-strings)))))
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t
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nil))))
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(defun ledger-check-version ()
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(interactive)
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(setq ledger-works (ledger-version-greater-p ledger-version-needed))
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(if ledger-works
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(message "Good Ledger Version")
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(message "Bad Ledger Version")))
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(provide 'ldg-exec)
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