Skeleton of new calendar import script.
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calendar-import.plx
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calendar-import.plx
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#!/usr/bin/perl -w
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# calendar-import.plx -*- Perl -*-
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# ====================================================================
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#
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# The sub's "safe_read_from_pipe" and read_from_process are:
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# ====================================================================
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# Copyright (c) 2000-2004 CollabNet. All rights reserved.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at http://subversion.tigris.org/license-1.html.
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# If newer versions of this license are posted there, you may use a
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# newer version instead, at your option.
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#
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# This software consists of voluntary contributions made by many
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# individuals. For exact contribution history, see the revision
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# history and logs, available at http://subversion.tigris.org/.
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# Note: bkuhn downloaded the license from
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# http://subversion.tigris.org/license-1.html on 2013-12-29 which said:
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# The license of Subversion 1.7 and later is at
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# http://svn.apache.org/repos/asf/subversion/trunk/LICENSE.
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# The license of Subversion 1.6 and earlier can be found at
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# http://svn.apache.org/repos/asf/subversion/tags/1.6.0/www/license-1.html.
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# Both license texts are now included, in APACHE-LICENSE and OLD-SVN-LICENSE,
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# respectively.
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# ====================================================================
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#
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# Copyright © 2013 Bradley M. Kuhn <bkuhn@ebb.org>
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#
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# This software's license gives you freedom; you can copy, convey,
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# propogate, redistribute and/or modify this program under the terms of
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# the GNU General Public License (GPL) as published by the Free
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# Software Foundation (FSF), either version 3 of the License, or (at your
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# option) any later version of the GPL published by the FSF.
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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
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# along with this program in a file in the toplevel directory called
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# "GPLv3". If not, see <http://www.gnu.org/licenses/>.
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use strict;
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use warnings;
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my($CONFIG_FILE) = (@ARGV);
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if (@ARGV != 1) {
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print STDERR "usage: $0 <CONFIG_FILE>\n";
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exit 1;
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}
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###############################################################################
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# Start a child process safely without using /bin/sh.
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sub safe_read_from_pipe
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{
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unless (@_)
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{
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DieLog("$0: safe_read_from_pipe passed no arguments.");
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}
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my $pid = open(SAFE_READ, '-|');
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unless (defined $pid)
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{
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DieLog("$0: cannot fork: $!");
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}
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unless ($pid)
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{
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open(STDERR, ">&STDOUT")
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or DieLog("$0: cannot dup STDOUT: $!");
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exec(@_)
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or DieLog("$0: cannot exec `@_': $!\n");
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}
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my @output;
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while (<SAFE_READ>)
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{
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s/[\r\n]+$//;
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push(@output, $_);
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}
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close(SAFE_READ);
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my $result = $?;
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my $exit = $result >> 8;
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my $signal = $result & 127;
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my $cd = $result & 128 ? "with core dump" : "";
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if ($signal or $cd)
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{
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DieLog("$0: pipe from `@_' failed $cd: exit=$exit signal=$signal\n");
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}
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if (wantarray)
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{
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return ($result, @output);
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}
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else
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{
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return $result;
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}
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}
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###############################################################################
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# Use safe_read_from_pipe to start a child process safely and return
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# the output if it succeeded or an error message followed by the output
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# if it failed.
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sub read_from_process
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{
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unless (@_)
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{
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DieLog("$0: read_from_process passed no arguments.");
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}
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my ($status, @output) = &safe_read_from_pipe(@_);
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if ($status)
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{
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return ("$0: `@_' failed with this output:", @output);
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}
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else
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{
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return @output;
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}
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}
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###############################################################################
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system("/usr/bin/lockfile -r 8 $CALENDAR_LOCK_FILE");
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DieLog("Failure to acquire calendar lock on $CALENDAR_LOCK_FILE") unless ($? == 0);
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my $config = ReadConfig($CONFIG_FILE);
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$config->{scrubPrivate} = 0 if not defined $config->{scrubPrivate};
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$config->{reportProblems} = $config->{user} if not defined $config->{reportProblems};
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$config->{emacsBinary} = "/usr/bin/emacs" if not defined $config->{emacsBinary};
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$config->{calendarStyle} = 'plain' if not defined $config->{calendarStyle};
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DieLog("$config->{emacsBinary} doesn't appear to be executable") unless -x $config->{emacsBinary};
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DieLog("$CONFIG_FILE doesn't specify a (readable) Git directory via gitDir setting: $!")
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unless defined $config->{gitDir} and -d $config->{gitDir};
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&$LOCK_CLEANUP_CODE();
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__END__
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# Local variables:
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# compile-command: "perl -c calendar-import.plx"
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# End:
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