#!/usr/bin/perl -w
#
# VSS to Perforce converter, phase III: construct Perforce depot
#
# Copyright 1998 Perforce Software.  All rights reserved.
# Written by James Strickland, April 1998
#
# This script uses the metadata produced by earlier phases to direct a loop
# which extracts VSS revisions and performs the required Perforce commands
# to construct a Perforce depot corresponding to the (improved) VSS data.
#
# RHGC - Modifed to use new depot and depot_root as specified in config.

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


# open all our input files
my $msg="can't open for read";
open(FILES,   "<$convert::metadata_dir/files")      or die $msg;
open(LABELS,  "<$convert::metadata_dir/labels")     or die $msg;
open(CHANGES, "<$convert::metadata_dir/changes")    or die $msg;
open(MAPPING, ">$convert::metadata_dir/mapping.ns") or die "can't open for write: $!";

# variables to be initialized with metadata read from files
my (%file_type,    # maps archive            -> file type
                   # e.g. "$/foo"            -> "text"

    %labels,       # maps "revision archive" -> list of labels
                   # e.g. "1 $/foo"          -> "itworks","bobsyouruncle"

    %filesinlabel, # maps label name         -> list of "file#rev"

    %added,        # maps depot file         -> true/false
                   # e.g. "//depot/foo"      -> 1
    );


# initialize %file_type
while(<FILES>) {
  chomp;
  my ($file_type,$file) = split(/ /,$_,2);
  $file_type{$file} = $file_type;
}
close(FILES);


# initialize %label and run p4 label once for each label which is not a
# "delete" label
my %created;
while(<LABELS>) {
  chomp;
  my ($revision,$label,$timestamp,$file) = split(/ /,$_,4);
  my $index = "$revision $file";
  $labels{$index} = defined($labels{$index}) ? [ @{$labels{$index}} , $label ]
                                             : [ $label ];

  my $comment = '';
  $comment .= <LABELS> while ($comment !~ /\*{10}\n/);
  $comment =~ s/\*{10}\n$//;

  $comment = "vsstop4 label" if ($comment =~ /^\s*$/);  # Set default comment.

  next if($created{$label});

  my $form=convert::p4run(" label -o $label"); # label names cannot contain spaces

  $comment =~ s@\n@\n\t@gs;

  my $label_view = "//$convert::depot/$convert::depot_root/...";

  # Update the Description field in the label.
  $form =~ s@(\nDescription:\s*)\n\s+\S[^\n]*\n@$1\n\t$comment@s;

  # RHGC - Create a more specific view for the label - not just all depots which is the default.
  $form =~ s@(\nView:\s*)\n\s+.*\n$@$1\n\t$label_view@s;

  # adjust the update time of the label
  my (@tm,$date);
  @tm=localtime($timestamp);
  $date=sprintf("%4d/%02d/%02d %02d:%02d:%02d",(($tm[5]>=70) ? $tm[5]+1900 : $tm[5]+2000),
                                                 $tm[4]+1,$tm[3],$tm[2],$tm[1],$tm[0]);
  if ($form =~ /(\nUpdate:\s*)\d.*$/) {
    $form =~ s@(\nUpdate:\s*)\d.*$@$1$date@s;
  } else {
    $form =~ s@(\nLabel:.*?\n)@$1\nUpdate: $date\n@s;
  }

  convert::p4run(" label -i",$form);
  $created{$label}=1;
}
close(LABELS);
undef %created; # we're finished with this hash, so free up the space


# print timestamp
print "Depot creation started         " . scalar(localtime()) . "\n";


# For each change,
# - retrieve revisions from VSS using 'get'
# - mark files as added or edited with 'p4 add' or 'p4 edit',
#   followed by 'p4 submit'
# - update list of file#rev associated with any pertinent labels

my $start_time = $convert::start_time;
my ($c,$op);
CHG: while( $c = get Change(\*CHANGES) ) {

  my ($change_number,@checkins);

  # Ignore change if a start_time is specified
  if ($start_time > $c->timestamp)
  {
    print "Ignoring changelist with timestamp: ". $c->datetime ."\n";
    next CHG;
  }

  my $index;
  foreach $index (@{$c->changelist}) {

    my $p4rev;

    my ($revision,$vss_file) = split(/ /,$index,2);

    my ($client_rel_dir,$client_file) = convert::p4dir_and_file( $vss_file);

    my $client_dir       = convert::join_paths( $convert::client_root,
                                                $client_rel_dir );

    # create all needed directories on the path
    convert::emkdir($client_dir);

    # for p4 - could use $client_file, but I'd rather make sure we use
    # the same string that's written out to the mapping file
    my $depot_file       = convert::join_paths("//$convert::depot",
                                               $client_rel_dir,
                                               $client_file );


    # get the file from VSS
    convert::get_vss_file($vss_file,($file_type{$vss_file} eq "tempobj") ? "" : $revision,$client_dir,$client_file);

    # see if the file is indeed there now
    if (-f "${client_dir}/${client_file}") {

      # schedule p4 add or edit operation
      # depending on whether file has already been added

      push(@checkins, [ $vss_file,$revision,$depot_file ] );
      my $operation;
      if($added{$depot_file}) {
        convert::p4run(" edit \"$depot_file\"") =~ /#(\d+) - opened for edit/ or die "p4 edit $depot_file failed";
        $p4rev=$1 +1;
      } else {
        # RHGC - because of restartability, add extra check
        if (convert::p4run(" -s fstat \"$depot_file\"") !~ /- no such file\(s\)/)
        {
          convert::p4run(" edit \"$depot_file\"") =~ /#(\d+) - opened for edit/ or die "p4 edit $depot_file failed";
          $added{$depot_file}=1;
          $p4rev=$1 +1;
        } else {
            my $addcmd = " add -t $file_type{$vss_file} \"$depot_file\"";
            if ($convert::typemap_regexp) {
                # don't specify type when file is handled with p4 typemap
                if ($depot_file =~ /$convert::typemap_regexp/) {
                $addcmd = " add \"$depot_file\"";
                } else {
                print "file $depot_file not matched by typemap.\n";
                }
            }
            convert::p4run($addcmd) =~ /opened for add/ or die "p4 add $depot_file failed";
            $added{$depot_file}=1;
            $p4rev=1;
        }
      }

      # check if this revision is labelled
      if(exists($labels{$index})) {
        for (@{$labels{$index}}) {
          $filesinlabel{$_} = defined($filesinlabel{$_})
                              ? [ @{$filesinlabel{$_}} , "$depot_file#$p4rev" ]
                              : [ "$depot_file#$p4rev" ];
        }
      }

    } else {  # the file isn't there - the ss get failed

      if ($convert::skip_ss_get_errors) {
        print STDERR "ERROR: VSS file not found: ${vss_file}#${revision}\n";
      } else {
        die "get_vss_file() revision $revision to $client_dir/$client_file failed";
      }

    }
  }

  # submit the change, and write out the association between VSS
  # archive and revision number and Perforce file and change number
  $change_number = $c->submit; # submit the change

  my $checkin;
  foreach $checkin (@checkins) {
    my ($vss_file,$r,$depot_filename) = @$checkin;
    # write change number#filename to avoid confusion with filename#revision
    print MAPPING "$r#$change_number#$depot_filename#$vss_file\n";
    # NOTE: $vss_file has to go last since it can contain # characters
  }
}

# now do the labelling
print "\nLabelling started              " . scalar(localtime()) . "\n";
for (keys(%filesinlabel)) {
  convert::p4run(" -x - labelsync -l $_",join("\n",@{$filesinlabel{$_}})."\n");
}