hydra/src/script/hydra_build.pl

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#! /var/run/current-system/sw/bin/perl -w
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use strict;
use File::Basename;
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use File::stat;
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use Hydra::Schema;
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use Hydra::Helper::Nix;
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my $db = openHydraDB;
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sub doBuild {
my ($build) = @_;
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my $drvPath = $build->drvpath;
my $outPath = $build->outpath;
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my $isCachedBuild = 1;
my $outputCreated = 1; # i.e., the Nix build succeeded (but it could be a positive failure)
my $startTime = 0;
my $stopTime = 0;
my $buildStatus = 0; # = succeeded
my $errormsg = undef;
my $failedDepBuild;
my $failedDepStepNr;
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registerRoot $outPath;
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if (!isValidPath($outPath)) {
$isCachedBuild = 0;
# Check whether a dependency of this build has previously
# failed. If so, don't even bother to build, since it will
# fail anyway. !!! Once Nix has negative caching, this code
# can go.
my @drvDeps = split '\n', `nix-store --query --requisites --include-outputs $drvPath`;
die "cannot query dependencies of `$drvPath': $?" if $? != 0;
@drvDeps = grep { $_ =~ /.drv$/ } @drvDeps;
my @drvOutputs = split '\n', `nix-store --query --outputs @drvDeps`;
die "cannot query outputs of the dependencies of `$drvPath': $?" if $? != 0;
foreach my $dep (@drvOutputs) {
# !!! This checks more than it has to, namely
# build-time-only dependencies of dependencies (which
# don't need to be built). However, it shouldn't matter:
# if the dependency was built, then presumably *its*
# dependencies were built as well.
# !!! should disregard fixed-output derivations (?)
if (!isValidPath($dep)) {
my ($step) = $db->resultset('BuildSteps')->search(
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{outPath => $dep}, {rows => 1, order_by => "stopTime DESC", busy => 0});
if ($step && $step->status != 0) {
$buildStatus = 5;
$failedDepBuild = $step->id->id;
$failedDepStepNr = $step->stepnr;
goto done;
}
}
}
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# Do the build.
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$startTime = time();
my $thisBuildFailed = 0;
my $someBuildFailed = 0;
# Run Nix to perform the build, and monitor the stderr output
# to get notifications about specific build steps, the
# associated log files, etc.
my $cmd = "nix-store --max-silent-time 1800 --keep-going --no-build-output " .
"--log-type flat --print-build-trace --realise $drvPath 2>&1";
my $buildStepNr = 1;
open OUT, "$cmd |" or die;
while (<OUT>) {
$errormsg .= $_;
unless (/^@\s+/) {
print STDERR "$_";
next;
}
if (/^@\s+build-started\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)$/) {
$db->txn_do(sub {
$db->resultset('BuildSteps')->create(
{ id => $build->id
, stepnr => $buildStepNr++
, type => 0 # = build
, drvpath => $1
, outpath => $2
, logfile => $4
, busy => 1
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, starttime => time
});
});
}
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elsif (/^@\s+build-succeeded\s+(\S+)\s+(\S+)$/) {
my $drvPath = $1;
$db->txn_do(sub {
(my $step) = $db->resultset('BuildSteps')->search(
{id => $build->id, type => 0, drvpath => $drvPath}, {});
die unless $step;
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$step->update({busy => 0, status => 0, stoptime => time});
});
}
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elsif (/^@\s+build-failed\s+(\S+)\s+(\S+)\s+(\S+)\s+(.*)$/) {
my $drvPathStep = $1;
$someBuildFailed = 1;
$thisBuildFailed = 1 if $drvPath eq $drvPathStep;
$db->txn_do(sub {
(my $step) = $db->resultset('BuildSteps')->search(
{id => $build->id, type => 0, drvpath => $drvPathStep}, {});
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if ($step) {
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$step->update({busy => 0, status => 1, errormsg => $4, stoptime => time});
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} else {
$db->resultset('BuildSteps')->create(
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{ id => $build->id
, stepnr => $buildStepNr++
, type => 0 # = build
, drvpath => $drvPathStep
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, outpath => $2
, logfile => $4
, busy => 0
, status => 1
, starttime => time
, stoptime => time
, errormsg => $4
});
}
});
}
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elsif (/^@\s+substituter-started\s+(\S+)\s+(\S+)$/) {
my $outPath = $1;
$db->txn_do(sub {
$db->resultset('BuildSteps')->create(
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{ id => $build->id
, stepnr => $buildStepNr++
, type => 1 # = substitution
, outpath => $1
, busy => 1
, starttime => time
});
});
}
elsif (/^@\s+substituter-succeeded\s+(\S+)$/) {
my $outPath = $1;
$db->txn_do(sub {
(my $step) = $db->resultset('BuildSteps')->search(
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{id => $build->id, type => 1, outpath => $outPath}, {});
die unless $step;
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$step->update({busy => 0, status => 0, stoptime => time});
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});
}
elsif (/^@\s+substituter-failed\s+(\S+)\s+(\S+)\s+(\S+)$/) {
my $outPath = $1;
$db->txn_do(sub {
(my $step) = $db->resultset('BuildSteps')->search(
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{id => $build->id, type => 1, outpath => $outPath}, {});
die unless $step;
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$step->update({busy => 0, status => 1, errormsg => $3, stoptime => time});
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});
}
else {
print STDERR "unknown Nix trace message: $_";
}
}
close OUT;
my $res = $?;
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$stopTime = time();
if ($res != 0) {
if ($thisBuildFailed) { $buildStatus = 1; }
elsif ($someBuildFailed) { $buildStatus = 2; }
else { $buildStatus = 3; }
}
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# Only store the output of running Nix if we have a miscellaneous error.
$errormsg = undef unless $buildStatus == 3;
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}
done:
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$db->txn_do(sub {
$build->update({finished => 1, timestamp => time});
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my $logPath = "/nix/var/log/nix/drvs/" . basename $drvPath;
$logPath = undef unless -e $logPath;
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my $releaseName;
if (-e "$outPath/nix-support/hydra-release-name") {
open FILE, "$outPath/nix-support/hydra-release-name" or die;
$releaseName = <FILE>;
chomp $releaseName;
close FILE;
}
$db->resultset('BuildResultInfo')->create(
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{ id => $build->id
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, iscachedbuild => $isCachedBuild
, buildstatus => $buildStatus
, starttime => $startTime
, stoptime => $stopTime
, logfile => $logPath
, errormsg => $errormsg
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, releasename => $releaseName
, faileddepbuild => $failedDepBuild
, faileddepstepnr => $failedDepStepNr
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});
if ($buildStatus == 0) {
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my $productnr = 1;
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if (-e "$outPath/nix-support/hydra-build-products") {
open LIST, "$outPath/nix-support/hydra-build-products" or die;
while (<LIST>) {
/^([\w\-]+)\s+([\w\-]+)\s+(\S+)(\s+(\S+))?$/ or next;
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my $type = $1;
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my $subtype = $2 eq "none" ? "" : $2;
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my $path = $3;
my $defaultPath = $5;
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next unless -e $path;
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my $fileSize, my $sha1, my $sha256;
# !!! validate $path, $defaultPath
if (-f $path) {
my $st = stat($path) or die "cannot stat $path: $!";
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$fileSize = $st->size;
$sha1 = `nix-hash --flat --type sha1 $path`
or die "cannot hash $path: $?";;
chomp $sha1;
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$sha256 = `nix-hash --flat --type sha256 $path`
or die "cannot hash $path: $?";;
chomp $sha256;
}
my $name = $path eq $outPath ? "" : basename $path;
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$db->resultset('BuildProducts')->create(
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{ build => $build->id
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, productnr => $productnr++
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, type => $type
, subtype => $subtype
, path => $path
, filesize => $fileSize
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, sha1hash => $sha1
, sha256hash => $sha256
, name => $name
, defaultpath => $defaultPath
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});
}
close LIST;
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}
else {
$db->resultset('BuildProducts')->create(
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{ build => $build->id
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, productnr => $productnr++
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, type => "nix-build"
, subtype => ""
, path => $outPath
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, name => $build->nixname
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});
}
}
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$build->schedulingInfo->delete;
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});
}
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my $buildId = $ARGV[0] or die;
print STDERR "performing build $buildId\n";
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# Lock the build. If necessary, steal the lock from the parent
# process (runner.pl). This is so that if the runner dies, the
# children (i.e. the build.pl instances) can continue to run and won't
# have the lock taken away.
my $build;
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$db->txn_do(sub {
$build = $db->resultset('Builds')->find($buildId);
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die "build $buildId doesn't exist" unless defined $build;
die "build $buildId already done" if defined $build->resultInfo;
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if ($build->schedulingInfo->busy != 0 && $build->schedulingInfo->locker != getppid) {
die "build $buildId is already being built";
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}
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$build->schedulingInfo->update({busy => 1, locker => $$});
$build->buildsteps->delete_all;
$build->buildproducts->delete_all;
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});
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die unless $build;
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# Do the build. If it throws an error, unlock the build so that it
# can be retried.
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eval {
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doBuild $build;
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print "done\n";
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};
if ($@) {
warn $@;
$db->txn_do(sub {
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$build->schedulingInfo->update({busy => 0, locker => $$});
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});
}