hydra/src/scheduler.pl

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Perl
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#! @perl@ -w
use strict;
use XML::Simple;
use DBI;
my $dbh = DBI->connect("dbi:SQLite:dbname=hydra.sqlite", "", "");
my $jobsXml = `nix-env -f ../test.nix --query --available "*" --attr-path --out-path --drv-path --meta --xml --system-filter "*"`
or die "cannot evaluate the Nix expression containing the job definitions: $?";
print "$jobsXml";
my $jobs = XMLin($jobsXml, KeyAttr => ['attrPath', 'name'])
or die "cannot parse XML output";
foreach my $jobName (keys %{$jobs->{item}}) {
my $job = $jobs->{item}->{$jobName};
print "JOB: $jobName ($job->{meta}->{description}->{value})\n";
my $outPath = $job->{outPath};
if (scalar(@{$dbh->selectall_arrayref("select * from builds where name = ? and outPath = ?", {}, $jobName, $outPath)}) > 0) {
print " already done\n";
next;
}
my $res = system("nix-build ../test.nix --attr $jobName");
my $buildStatus = $res == 0 ? 0 : 1;
$dbh->prepare("insert into builds(timestamp, name, description, drvPath, outPath, buildStatus) values(?, ?, ?, ?, ?, ?)")
->execute(time(), $jobName, $job->{meta}->{description}->{value}, $job->{drvPath}, $outPath, $buildStatus);
print " db id = ", $dbh->last_insert_id(undef, undef, undef, undef), "\n";
}