#!/usr/bin/perl -w

use lib '.';
use Getopt::Long;
use P4::Modules;

($CLIENT, $ROOT, $MODULES, $EXTRAS) = ('c2p', '', '', '');
($OPTIONS, $bfile, $file) = ('rmdir', '', '');

my $help = 0;
(my $cmd = $0) =~ s/.*\///;

sub usage {
    print <<_EOF_;
Usage: $cmd -b branch -c client -e extra -f file -m modules -o options -r root
       $cmd -h

    -b file      file listing branch mappings            (no default)
    -c client    create/update this client               (def. $CLIENT)
    -e extra     one extra client view mapping           (no default)
    -f file      the modules file to use                 (def. system installed)
    -h           show usage
    -m modules   modules to map from the perforce depots (def. all modules)
    -o options   perforce client options                 (def. $OPTIONS)
    -r root      perforce client root directory          (no default)

_EOF_
    exit $_[0] || 0;
}
usage(0) unless @ARGV;
GetOptions('branch=s'	=> \$bfile,
	   'client=s'	=> \$CLIENT,
	   'extra=s'	=> \$EXTRAS,
	   'file=s'	=> \$file,
	   'help'	=> \$help,
	   'modules=s'	=> \$MODULES,
	   'options=s'	=> \$OPTIONS,
	   'root=s'	=> \$ROOT) || usage(1);
	
usage(0) if $help;
!$bfile and die "no branch file specified\n";

my $config = shift;
require $config if $config;

my $mod = P4::Modules->new($file);

$client_spec = <<_EOF_;
Client: $CLIENT

Description:
        Automatically generated client for cvs2p4 migration.

Root: $ROOT

Options: $OPTIONS

View:
_EOF_

open BRANCHES, "<$bfile" or die "can't open $bfile: $!\n";
while (<BRANCHES>) {
    chomp;
    next if /^#/;
    next if /^\s*$/;
    my ($p4branch, $cvsbranch) = split /\s+/;
    $p4branch =~ s|/$||;
    $p4branch =~ s|^/|| unless $p4branch =~ m|^//|;
    $cvsbranch = $p4branch unless $cvsbranch;
    my %map = $mod->client($p4branch, $MODULES, "$CLIENT/$cvsbranch");
    $client_spec .= join("\n", map { "\t$_ $map{$_}" } keys %map) . "\n";
}
close BRANCHES;

$client_spec .= join("\n", map { "\t$_" } split /\n+/, $EXTRAS) . "\n";
print "$client_spec";