Feature

- Add the configuration variable 'print.empty.columns'.
- If this variable is set to 'no', columns with all empty values are not
  printed. This variable defaults to 'yes' (thus nothing is changed
  by default).
- Updated taskrc.5.in to mention the new variable.
- Added unit tests.

test/feature.print.empty.columns.t

@@ -0,0 +1,60 @@
+#! /usr/bin/env perl
+################################################################################
+## taskwarrior - a command line task list manager.
+##
+## Copyright 2006-2012, Paul Beckingham, Federico Hernandez.
+##
+## Permission is hereby granted, free of charge, to any person obtaining a copy
+## of this software and associated documentation files (the "Software"), to deal
+## in the Software without restriction, including without limitation the rights
+## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+## copies of the Software, and to permit persons to whom the Software is
+## furnished to do so, subject to the following conditions:
+##
+## The above copyright notice and this permission notice shall be included
+## in all copies or substantial portions of the Software.
+##
+## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+## THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+## SOFTWARE.
+##
+## http://www.opensource.org/licenses/mit-license.php
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 4;
+
+# Create the rc file.
+if (open my $fh, '>', 'bug.rc')
+{
+  print $fh "data.location=.\n";
+  print $fh "report.test.columns=id,project\n";
+  close $fh;
+  ok (-r 'bug.rc', 'Created bug.rc');
+}
+
+# Feature: variable to control printing of empty columns
+qx{../src/task rc:bug.rc add sample desc 2>&1};
+
+my $output = qx{../src/task test rc:bug.rc 2>&1};
+like ($output, qr/Project/, 'empty \'project\' column is printed by default');
+
+$output = qx{../src/task test rc.print.empty.columns:no rc:bug.rc 2>&1};
+unlike ($output, qr/Project/, 'empty \'project\' column is not printed if rc.print.empty.columns:no');
+
+# Cleanup.
+unlink qw(pending.data completed.data undo.data backlog.data synch.key bug.rc);
+ok (! -r 'pending.data'   &&
+    ! -r 'completed.data' &&
+    ! -r 'undo.data'      &&
+    ! -r 'backlog.data'   &&
+    ! -r 'synch.key'      &&
+    ! -r 'bug.rc', 'Cleanup');
+
+exit 0;