if (length($c->stash->{project}->declfile)) {
        error($c, "can't modify jobset of declarative project", 403);
    }

    if (length($c->stash->{project}->declfile)) {
        error($c, "can't modify jobset of declarative project", 403);
    }

        , declfile => trim($c->stash->{params}->{declfile})
        , decltype => trim($c->stash->{params}->{decltype})
        , declvalue => trim($c->stash->{params}->{declvalue})

    if (length($project->declfile)) {
        $project->jobsets->update_or_create(
            { name=> ".jobsets"
            , nixexprinput => ""
            , nixexprpath => ""
            , emailoverride => ""
            , triggertime => time
            });
    }

    restartBuild getPrevJobsetEval

    restartBuild getPrevJobsetEval updateDeclarativeJobset
    handleDeclarativeJobsetBuild

sub updateDeclarativeJobset {
    my ($db, $project, $jobsetName, $declSpec) = @_;
    my @allowed_keys = qw(
        enabled
        hidden
        description
        nixexprinput
        nixexprpath
        checkinterval
        schedulingshares
        enableemail
        emailoverride
        keepnr
    );
    my %update = ( name => $jobsetName );
    foreach my $key (@allowed_keys) {
        $update{$key} = $declSpec->{$key};
        delete $declSpec->{$key};
    }
    txn_do($db, sub {
        my $jobset = $project->jobsets->update_or_create(\%update);
        $jobset->jobsetinputs->delete;
        while ((my $name, my $data) = each %{$declSpec->{"inputs"}}) {
            my $input = $jobset->jobsetinputs->create(
                { name => $name,
                  type => $data->{type},
                  emailresponsible => $data->{emailresponsible}
                });
            $input->jobsetinputalts->create({altnr => 0, value => $data->{value}});
        }
        delete $declSpec->{"inputs"};
        die "invalid keys in declarative specification file\n" if (%{$declSpec});
    });
};
sub handleDeclarativeJobsetBuild {
    my ($db, $project, $build) = @_;
    eval {
        my $id = $build->id;
        die "Declarative jobset build $id failed" unless $build->buildstatus == 0;
        my $declPath = ($build->buildoutputs)[0]->path;
        my $declText = read_file($declPath)
            or die "Couldn't read declarative specification file $declPath: $!";
        my $declSpec = decode_json($declText);
        txn_do($db, sub {
            my @kept = keys %$declSpec;
            push @kept, ".jobsets";
            $project->jobsets->search({ name => { "not in" => \@kept } })->update({ enabled => 0, hidden => 1 });
            while ((my $jobsetName, my $spec) = each %$declSpec) {
                updateDeclarativeJobset($db, $project, $jobsetName, $spec);
            }
        });
    };
    $project->jobsets->find({ name => ".jobsets" })->update({ errormsg => $@, errortime => time, fetcherrormsg => undef })
        if defined $@;
};

    $s =~ /^($projectNameRE):($jobsetNameRE)$/ or die "invalid jobset specifier ‘$s’\n";

    $s =~ /^($projectNameRE):(\.?$jobsetNameRE)$/ or die "invalid jobset specifier ‘$s’\n";

=head2 declfile

  data_type: 'text'
  is_nullable: 1
=head2 decltype
  data_type: 'text'
  is_nullable: 1
=head2 declvalue
  data_type: 'text'
  is_nullable: 1

  { data_type => "text", is_nullable => 1 },
  "declfile",
  { data_type => "text", is_nullable => 1 },
  "decltype",
  { data_type => "text", is_nullable => 1 },
  "declvalue",

# Created by DBIx::Class::Schema::Loader v0.07043 @ 2015-07-30 16:52:20
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:67kWIE0IGmEJTvOIATAKaw

# Created by DBIx::Class::Schema::Loader v0.07043 @ 2016-03-11 10:39:17
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:1ats3brIVhRTWLToIYSoaQ

      </div>
    </div>
    <div class="control-group">
      <label class="control-label">Declarative spec file</label>
      <div class="controls">
        <div class="input-append">
          <input type="text" class="span3" name="declfile" [% HTML.attributes(value => project.declfile) %]/>
        </div>
        <span class="help-inline">(Leave blank for non-declarative project configuration)</span>

    <div class="control-group">
      <label class="control-label">Declarative input type</label>
      <div class="controls">
        [% INCLUDE renderSelection param="decltype" options=inputTypes edit=1 curValue=project.decltype %]
        value
        <input style="width: 70%" type="text" [% HTML.attributes(value => project.declvalue, name => "declvalue") %]/>
      </div>
    </div>

        [% UNLESS project.declfile %]

        [% END %]

        [% UNLESS project.declfile %]

        [% END %]

use JSON;
use File::Slurp;

    my $jobsetsJobset = length($project->declfile) && $jobset->name eq ".jobsets";
    if ($jobsetsJobset) {
        my @declInputs = fetchInput($plugins, $db, $project, $jobset, "decl", $project->decltype, $project->declvalue, 0);
        my $declInput = @declInputs[0] or die "cannot find the input containing the declarative project specification\n";
        die "multiple alternatives for the input containing the declarative project specificaiton are not supported\n"
            if scalar @declInputs != 1;
        my $declFile = $declInput->{storePath} . "/" . $project->declfile;
        my $declText = read_file($declFile)
            or die "Couldn't read declarative specification file $declFile: $!\n";
        my $declSpec;
        eval {
            $declSpec = decode_json($declText);
        };
        die "Declarative specification file $declFile not valid JSON: $@\n" if $@;
        updateDeclarativeJobset($db, $project, ".jobsets", $declSpec);
        $jobset->discard_changes;
    }

    if ($jobsetsJobset) {
        my @keys = keys %$jobs;
        die "The .jobsets jobset must only have a single job named 'jobsets'"
            unless (scalar @keys) == 1 && $keys[0] eq "jobsets";
    }

use Hydra::Helper::AddBuilds;

    my $project = $build->project;
    my $jobset = $build->jobset;
    if (length($project->declfile) && $jobset->name eq ".jobsets" && $build->iscurrent) {
        handleDeclarativeJobsetBuild($db, $project, $build);
    }

    declfile      text, -- File containing declarative jobset specification
    decltype      text, -- Type of the input containing declarative jobset specification
    declvalue     text, -- Value of the input containing declarative jobset specification

-- Add declarative fields to Projects
alter table Projects add column declfile text;
alter table Projects add column decltype text;
alter table Projects add column declvalue text;