123 lines
3.8 KiB
Perl
Executable file
123 lines
3.8 KiB
Perl
Executable file
#!/usr/bin/perl
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# trail-balance-report.plx -*- Perl -*-
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#
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# Script to generate a Trial Balance report for a ledger.
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#
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# Copyright (C) 2011, Bradley M. Kuhn
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#
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# This program gives you software freedom; you can copy, modify, convey,
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# and/or redistribute it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program in a file called 'GPLv3'. If not, write to the:
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# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor
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# Boston, MA 02110-1301, USA.
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use strict;
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use warnings;
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use Math::BigFloat;
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my $LEDGER_CMD = "/usr/bin/ledger";
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my $ACCT_WIDTH = 70;
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# http://www.moneyinstructor.com/lesson/trialbalance.asp
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# told me:
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# Key to preparing a trial balance is making sure that all the account
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# balances are listed under the correct column. The appropriate columns
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# are as follows:
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# Assets = Debit balance
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# Liabilities = Credit balance
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# Expenses = Debit Balance
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# Equity = Credit balance
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# Revenue = Credit balance
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# So, there are some sign switches that are needed:
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sub ParseNumber($) {
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$_[0] =~ s/,//g;
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return Math::BigFloat->new($_[0]);
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}
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Math::BigFloat->precision(-2);
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my $ZERO = Math::BigFloat->new("0.00");
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if (@ARGV == 0) {
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print STDERR "usage: $0 <LEDGER_OPTIONS>\n";
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exit 1;
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}
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my(@ledgerOptions) = ('--wide-register-format', "%-.${ACCT_WIDTH}A %22.108t" .'\n', '-w', '-s', @ARGV,
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'reg');
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open(LEDGER_DEBIT, "-|", $LEDGER_CMD, '-d', 'a>0', @ledgerOptions)
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or die "Unable to run $LEDGER_CMD -d a<0 @ledgerOptions: $!";
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my %acct;
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while (my $negLine = <LEDGER_DEBIT>) {
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chomp $negLine;
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die "Unable to parse output line from negative_ledger command: $negLine"
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unless $negLine =~ /^\s*([^\$]+)\s+\$\s*\s*([\d\.\,]+)/;
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my($account, $amount) = ($1, $2);
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$amount = ParseNumber($amount);
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$account =~ s/^\s+//; $account =~ s/\s+$//;
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$acct{$account}{debit} = $amount;
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}
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close LEDGER_DEBIT;
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die "error($0): $! while running negative_ledger command line" unless ($? == 0);
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# Lazy here: this is nearly identical to loop above
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open(LEDGER_CREDIT, "-|", $LEDGER_CMD, '-d', 'a<0', @ledgerOptions)
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or die "Unable to run $LEDGER_CMD -d a<0 @ledgerOptions: $!";
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while (my $postLine = <LEDGER_CREDIT>) {
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chomp $postLine;
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die "Unable to parse output line from positive_ledger command: $postLine"
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unless $postLine =~ /^\s*([^\$]+)\s+\$\s*\-\s*([\d\.\,]+)/;
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my($account, $amount) = ($1, $2);
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$amount = ParseNumber($amount);
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$account =~ s/^\s+//; $account =~ s/\s+$//;
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$acct{$account}{credit} = $amount;
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}
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close LEDGER_CREDIT;
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die "error($0): $! while running positive_ledger command line" unless ($? == 0);
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print sprintf("%-${ACCT_WIDTH}.${ACCT_WIDTH}s %s %s\n\n", "ACCOUNT", "DEBITS", "CREDITS");
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my $format = "%-${ACCT_WIDTH}.${ACCT_WIDTH}s \$%11.2f \$%11.2f\n";
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my($totDeb, $totCred) = ($ZERO, $ZERO);
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foreach my $account (sort keys %acct) {
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foreach my $val (qw/debit credit /) {
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$acct{$account}{$val} = $ZERO unless defined $acct{$account}{$val};
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}
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print sprintf($format, $account,
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$acct{$account}{debit}, $acct{$account}{credit});
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$totDeb += $acct{$account}{debit};
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$totCred += $acct{$account}{credit};
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}
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print "\n\n", sprintf($format, 'TOTAL', $totDeb, $totCred);
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###############################################################################
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#
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# Local variables:
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# compile-command: "perl -c trial-balance-report.plx"
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# End:
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