#!/usr/bin/perl -w
#
# PVCS to Perforce converter, phase IV: niceties after the fact
#
# Copyright 1997 Perforce Software.  All rights reserved.
# Written by James Strickland, July 1997
#
# This script sorts the mapping output by phase III to be keyed by archive,
# then revision number.

require 5.0;
use strict;
use integer;
use lib '.';
use convert;

open(MAPPING, "<$convert::metadata_dir/mapping.ns") or die "can't open for read: $!";
open(NEWMAPPING, ">$convert::metadata_dir/mapping") or die "can't open for write: $!";

my (@checkins,$checkin);

# read 'em in

while(<MAPPING>) {
  chomp;
  push @checkins,[ split(/#/) ];
}

# sort 'em
@checkins = sort by_archive_then_revision @checkins;

# write 'em out

my $last_archive="";
my $archive_count=0;
print NEWMAPPING "# This file is sorted by archive name.
# For each archive all PVCS revisions are listed with the associated Perforce
# change number and filename.\n";

foreach $checkin (@checkins) {
  my ($archive,$revision,$change_number,$depot_file) = @$checkin;
  if($archive ne $last_archive) {
    print NEWMAPPING "\n\"$archive\"\n";
    $last_archive=$archive;
    $archive_count++;
  }
  printf NEWMAPPING "%16s  %4d \"%s\"\n",$revision,$change_number,$depot_file;
}

my $summary = "\n" . scalar(@checkins) . " revisions in $archive_count archives.\n";
print NEWMAPPING $summary;
print $summary;



sub by_archive_then_revision
{
  my ($archivea,$archiveb);

  $archivea = $$a[0];
  $archiveb = $$b[0];

  if($archivea ne $archiveb) {
    return $archivea cmp $archiveb;
  }

  my (@reva,@revb);
  @reva = split(/\./,$$a[1]);
  @revb = split(/\./,$$b[1]);

  if($#reva != $#revb) {
    return $#reva <=> $#revb;
  }

  my $i;
  for($i=0;$i<=$#reva;$i++) {
    if($reva[$i] != $revb[$i]) {
      return $reva[$i] <=> $revb[$i];
    }
  }

  return 0; # they're the same (this shouldn't actually happen..)
}