Re: Personal accounting with emacs, org and...?

[Eric S Fraga <ucecesf@ucl.ac.uk>]

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On Thu, 22 Jul 2010 10:06:30 -0700, "Eric Schulte" <schulte.eric@gmail.com> wrote:
> 
> Eric S Fraga <ucecesf@ucl.ac.uk> writes:
> 
> > On Thu, 22 Jul 2010 01:26:29 -0500, Russell Adams <RLAdams@AdamsInfoServ.Com> wrote:
> >> 
> >> On Thu, Jul 22, 2010 at 01:20:58AM -0500, Marcelo de Moraes Serpa wrote:
> >> > Hey list,
> >> > 
> >> > I was wondering if anyone out there manages his personal accounting
> >> > with org. I never really managed my personal finances, but I think
> >> > it's about time to know where my money comes from and where it is
> >> > going (and where the leaks are :P). I would use something like
> >> > lessaccounting.com, but I would rather integrate it into my
> >> > orgmode-based PIM. Any ideas?
> >> 
> >> I use John Wiegley's Ledger (of Remember fame), which is a CLI tool
> >> that does reporting against plain text files.
> >> 
> >> I do my expense reporting and business accounting in it. Very flexible
> >> and because it is text based, I can use version control and emacs.
> >
> > and, with org-babel, you can place your ledger entries in an org
> > file...  I have a simple ob-ledger implementation which doesn't do
> > tangling yet (as I don't yet know how to provide this level of
> > support) but it does work for single blocks of ledger entries.
> 
> Tangling does not require *any* language specific support.  Since the
> integration of Babel into Org-mode any type of code block should tangle
> just fine.  For example the following minimal org file tangles a code
> block of the fictional /schulte/ language to a file "eric.sh"

Yes, thanks, I figured this out on the way home (the advantage of a
long commute is time to play!) before I got your email.  The tangling
works like a charm.  What's even better is that ability to specify the
tangle property as an org property which only affects code blocks
within a certain heading!  Fantastic.

> It does look like there is fertile ground for Babel<->Ledger
> integration.

Attached is my simple, linux only, org-babel solution and an example
org file which uses it.  Note, I've still not had a chance to look at
the ob-template in Worg so I'm sure my ob-ledger file could be
improved...

Thanks again all those who have contributed to babel!

eric

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;;; ob-ledger.el --- org-babel functions for ledger evaluation

;; Copyright (c) 2009 Eric S Fraga

;; based on code by
;; Copyright (C) 2009 Eric Schulte

;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; Version: 0.01

;;; License:

;; This program 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, or (at your option)
;; any later version.
;;
;; This program 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:

;; 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 leger program
;;
;; 3) we are adding the "cmdline" header argument
;;
;; 4) there are no variables

;;; Code:
;; (require 'org-babel)

;;(org-babel-add-interpreter "ledger")

;;(add-to-list 'org-babel-tangle-langs '("ledger" "ledger"))

(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 (make-temp-file "org-babel-ledger"))
	(out-file (make-temp-file "org-babel-ledger-output"))
	)
    (with-temp-file in-file (insert body))
    (message (concat "ledger -f " in-file " " cmdline))
    (with-output-to-string (shell-command (concat "ledger -f " in-file " " cmdline " > " 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)
;;; org-babel-ledger.el ends here

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* ledger test
*** income and expenses
    :PROPERTIES:
    :tangle:   account.ledger
    :END:
    The property for this heading specifies where the tangled output of
    the ledger code blocks in what follows should end up.
***** income
      The first set of entries relates to income, either monthly pay or
      interest, all typically going into my bank account.

#+begin_src ledger
2010/01/01 * Starting balance
  assets:bank:savings  £1300.00
  income:starting balances
2010/07/22 * Got paid
  assets:bank:chequing  £1000.00
  income:salary
2010/07/31 * Interest on bank savings
  assets:bank:savings  £3.53
  income:interest
2010/07/31 * Transfer savings
  assets:bank:savings  £250.00
  assets:bank:chequing
2010/08/01 got paid again
  assets:bank:chequing  £1000.00
  income:salary
#+end_src
***** expenses
      The following entries relate to personal expenses (rent and food).

#+begin_src ledger
2010/07/23 Rent
  expenses:rent  £500.00
  assets:bank:chequing
2010/07/24 Food
  expenses:food  £150.00
  assets:bank:chequing
#+end_src

*** Financial summary
    Assuming you have tangled the ledger entries (=C-c C-v t=), you can now
    perform all kinds of calculations
***** overall summary
      The overall balance of your account and expenditure with a breakdown
      according to category:

#+begin_src ledger :cmdline -s bal :results value 
!include /home/ucecesf/s/test/account.ledger
#+end_src

#+results:
#+begin_example
           £2653.53  assets:bank
           £1100.00    chequing
           £1553.53    savings
            £650.00  expenses
            £150.00    food
            £500.00    rent
          £-3303.53  income
             £-3.53    interest
          £-2000.00    salary
          £-1300.00    starting balances
#+end_example

***** monthly register
      You can also generate a monthly register by executing the following:

#+begin_src ledger :cmdline -M -w reg
!include /home/ucecesf/s/test/account.ledger
#+end_src

#+results:
#+begin_example
2010/01/01  - 2010/01/31                        assets:bank:savings                                 £1300.00              £1300.00
                                                income:starting balances                           £-1300.00                      0
2010/07/01  - 2010/07/31                        assets:bank:chequing                                 £100.00               £100.00
                                                assets:bank:savings                                  £253.53               £353.53
                                                expenses:food                                        £150.00               £503.53
                                                expenses:rent                                        £500.00              £1003.53
                                                income:interest                                       £-3.53              £1000.00
                                                income:salary                                      £-1000.00                      0
2010/08/01  - 2010/08/01                        assets:bank:chequing                                £1000.00              £1000.00
                                                income:salary                                      £-1000.00                      0
#+end_example


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-- 
Eric S Fraga
GnuPG: 8F5C 279D 3907 E14A 5C29  570D C891 93D8 FFFC F67D

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