#! /usr/bin/perl
#
# NAME: renamebranch.pl
# DESC: This script uses original branchspec name to make a new branchspec, 
#       and then deletes the old branchspec.
#
# Command line equivalent
# p4 branch -o OLD | sed '/^Branch:/ c\Branch: NEW' | p4 branch -i
# p4 branch -d OLD
#
$branchold = shift ARGV;	#The original branchspec name to rename.
$user   = shift ARGV;		#The current user.
$server = shift ARGV;           #ip_address:port of your Perforce server.
$branchnew = shift ARGV;	#The new branchspec name to replace original.

$p4     = "p4";		# Absolute path to the p4 cli program.

if ($branchold eq $branchnew)
{
  print "\nNew branchspec name must be unique and not already exist.\n\nSelect a branchspec and try again.\n";
  exit 1;
}

$cmd = "\"$p4\" -u $user -p $server branch -o \"$branchold\" | sed '/^Branch:/ c\Branch: \"$branchnew\"' | p4 branch -i |";

open RENAME, $cmd
  or die "Cannot run rename branchspec command.\n\n";

$count = 0;

while (<RENAME>)
{
  # Run the second command to delete the original branchspec
  $cmd2 = "\"$p4\" -u $user -p $server branch -d \"$branchold\" |";

  open DELORIG, $cmd2
    or die "Cannot run delete for original branchspec command.\n\n";
 
  $count++;
  
}  

if($count ne 0) { print "\nBranchspec rename complete.\n\nBranchspec renamed from $branchold to $branchnew.\nBranchspec $branchold deleted.\n";   }
if($count eq 0) { print "\nNo branchspec rename performed.\n"; }
 
exit 0;