#! /usr/bin/perl -w 
use strict;

=head1 Notices

Originally developed for Perforce by VIZIM (www.vizim.com)

Copyright (c) 2014 Perforce Software, Inc. and VIZIM Worldwide, Inc.
All rights reserved.

Please see LICENSE.txt in top-level folder of this distribution for
license information

=cut

use v5.14.0;   # Earliest version testing was performed against

my $APPNAME = 'TFSTwoHop.pl';
my $APPWHAT = 'Two hop rename log extraction; version 1.02';
my $APPNOTICES = "Copyright (c) 2014 Perforce Software, Inc. and VIZIM Worldwide, Inc.
All rights reserved.
See LICENSE.txt for license information.";

=head1 Two hop rename identifier

Tool that scans the log output from TFSAssociate.pl for "twohop" renames.

Twohop renames are a rename that is subsequently renamed to another name
prior to check in.
There may be other intermediate renames but TFS only reports on the first
and last renames in a sequence.

The output is lines to resolve the twohop renames in the format expected
by the TFSRenames.pl tool.

=cut

if( defined $ARGV[0] && (uc $ARGV[0] eq '-V') ) {
  print "$APPWHAT\n";
  exit(0);
}

if( ! defined $ARGV[0]
    || $ARGV[0] =~ m!^\-+[h\?]! ) {
  print "$APPWHAT
$APPNOTICES

Usage:

$APPNAME -V
$APPNAME [-h|-?]
$APPNAME AssociateLog\n";
  exit( 0 );
}

if( ! -e $ARGV[0] ) {
  print "Associate log file does not exist - $ARGV[0]\n";
  exit 1;
}

if( ! -f $ARGV[0] ) {
  print "Associate log file is not a file - $ARGV[0]\n";
  exit 1;
}

my $hLog;
open $hLog, '<', $ARGV[0] || die "Can't open $ARGV[0] $!";

my $changeset = 0;
while(<$hLog>) {
  $changeset = $1 if m!Changeset (\d+)!;
  next unless m!RenameMatching delete!;
  print "RF $changeset $1\n"
    if m!\(([^\)]+)\)!;
}
close $hLog;