#! /usr/bin/perl

# ex:ts=8 sw=4:
# $OpenBSD: dpb,v 1.88 2013/04/13 10:02:11 espie Exp $
#
# Copyright (c) 2010 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

use strict;
use warnings;
my ($ports1, $olddie, $oldwarn, $reporter);
use FindBin;
BEGIN {
	$ports1 = $ENV{PORTSDIR} || '/usr/ports';
# inspired by Carp::Always
	$olddie = $SIG{__DIE__};
	$oldwarn = $SIG{__WARN__};
	sub trace_message
	{
		my $msg = '';
		my $x = 1;
		while (1) {
			my @c;
			{
				package DB;
				our @args;
				@c = caller($x+1);
			}
			last if !@c;
			$msg .= "$c[3](". 
			    join(', ', map { 
				    if (!defined $_) {
					'<undef>';
				    } else {
					my $string;
					eval { $string = $_->debug_dump };
					if (defined $string) {
					    "$_($string)";
					} else {
					    $_;
					}
				    }
				} @DB::args). 
			    ") called at $c[1] line $c[2]\n";
			$x++;
		}
		return $msg;
	}

	my $trace = 1;
	if ($trace) {
		$SIG{__WARN__} = sub {
			my $_ = pop @_;
			s/(.*)( at .*? line .*?\n$)/$1/s;
			push @_, $_;
			$SIG{__WARN__} = $oldwarn;
			if (defined $reporter) {
				$reporter->myprint(&trace_message);
			} else {
				warn &trace_message;
			}
		};

		$SIG{__DIE__} = sub {
	 		die @_ if $^S;
			my $_ = pop @_;
			s/(.*)( at .*? line .*?\n$)/$1/s;
			push @_, $_;
			if (defined $reporter) {
				$reporter->reset_cursor;
			}
			$SIG{__DIE__} = $olddie;
			die join("\n", @_, &trace_message);
		};

		$SIG{INFO} = sub {
			print "Trace:\n", &trace_message;
			sleep 1;
		};
	}

}

END {
	$SIG{__DIE__} = $olddie;
	$SIG{__WARN__} = $oldwarn;
}

use lib ("$ports1/infrastructure/lib", "$FindBin::Bin/../lib");

package DPB::State;
our @ISA = qw(OpenBSD::State);

use OpenBSD::State;
use OpenBSD::Paths;
use DPB::Heuristics;
use DPB::PkgPath;
use DPB::Logger;
use DPB::Affinity;
use File::Path;
use File::Basename;

sub define_present
{
	my ($self, $k) = @_;
	return defined $self->{subst}{$k};
}

sub init
{
	my $self = shift;
	$self->SUPER::init;
	$self->{no_exports} = 1;
	$self->{heuristics} = DPB::Heuristics->new($self);
	$self->{make} = $ENV{MAKE} || OpenBSD::Paths->make;
	($self->{ports}, $self->{portspath}, $self->{repo}, $self->{localarch}, $self->{distdir}) =
	    DPB::Vars->get($self->make,
	    "PORTSDIR", "PORTSDIR_PATH", "PACKAGE_REPOSITORY", 
	    "MACHINE_ARCH", "DISTDIR");
	$self->{arch} = $self->{localarch};
	$self->{portspath} = [ split(/:/, $self->{portspath}) ];
	$self->{starttime} = time();

	return $self;
}

sub startdate
{
	my $self = shift;
	my @l = gmtime $self->{starttime};
	$l[5] += 1900;
	$l[4] ++;
	return sprintf '%04d-%02d-%02d@%02d:%02d:%02d', @l[5,4,3,2,1,0];
}

sub expand_path
{
	my ($self, $path) = @_;
	$path =~ s/\%L/$self->{logdir}/g;
	$path =~ s/\%p/$self->{ports}/g;
	$path =~ s/\%h/DPB::Core::Local->hostname/ge;
	$path =~ s/\%a/$self->{arch}/g;
	$path =~ s/\%t/$self->{starttime}/g;
	$path =~ s/\%d/$self->startdate/ge;
	$path =~ s/\%f/$self->{distdir}/g;
	return $path;
}

sub interpret_path
{
	my ($state, $path, $do, $scale) = @_;

	my $weight;
	if ($path =~ s/\=(.*)//) {
		$weight = $1;
	}
	if ($path =~ s/\*(\d+)$//) {
		$scale = $1;
	}
	$path =~ s/\/+$//;
	$path =~ s/^\.\/+//;
	my $p = DPB::PkgPath->new($path);
	if (defined $scale) {
		$p->{scaled} = $scale;
	}
	for my $d (@{$state->{portspath}}) {
		if (-d join('/', $d , $p->pkgpath)) {
			&$do($p, $weight);
			return;
	   	} 
	}
	$state->usage("Bad package path: #1", $path);
}

sub interpret_paths
{
	my $state = shift;
	my $do = pop;
	for my $file (@_) {
		my $scale;
		if ($file =~ s/\*(\d+)$//) {
			$scale = $1;
		}

		if (-f $file) {
			open my $fh, '<', $file or
			    $state->usage("Can't open $file");
			my $_;
			while (<$fh>) {
				chomp;
				s/\s*(?:\#.*)?$//;
				next if m/^$/;
				$state->interpret_path($_, $do, $scale);
			}
		} else {
			$state->interpret_path($file, $do);
		}
	}
}

sub handle_options
{
	my $state = shift;
	$state->{dontclean} = {};
	$state->{opt} = {
		A => sub {
			$state->{arch} = shift;
		},
		L => sub {
			$state->{logdir} = shift;
		},
		l => sub {
			$state->{lockdir} = shift;
		},
		r => sub {
			$state->{random} = 1;
			$state->heuristics->random;
		},
		P => sub {
			push(@{$state->{paths}}, shift);
		},
		I => sub {
			push(@{$state->{ipaths}}, shift);
		},
		C => sub {
			push(@{$state->{cpaths}}, shift);
		},
		X => sub {
			push(@{$state->{xpaths}}, shift);
		},
		b => sub {
			push(@{$state->{build_files}}, shift);
		},
	};

	$state->SUPER::handle_options('acemqrRsuUvh:S:xX:A:C:f:F:I:j:J:M:p:P:b:l:L:',
    "[-acemrRsuUvx] [-A arch] [-C plist] [-f N] [-F N] [-I plist] [-J p] [-j N]",
    "[-p parallel] [-P plist] [-h hosts] [-L logdir] [-l lockdir] [-b log]",
    "[-M threshold] [-X plist] [path ...]");
    	$state->{fullrepo} = join("/", $state->{repo}, $state->arch, "all");
	$state->{logdir} //= $ENV{LOGDIR} // '%p/logs/%a';
	$state->{lockdir} //= "%L/locks";
	if (defined $state->{opt}{F}) {
		if (defined $state->{opt}{j} || defined $state->{opt}{f}) {
			$state->usage("Can't use -F with -f or -j");
		}
		$state->{fetch_only} = 1;
		$state->{opt}{f} = $state->{opt}{F};
		$state->{opt}{j} = 1;
		$state->{opt}{e} = 1;
	}
	$state->{opt}{f} //= 2;
	if (defined $state->opt('j')) {
		if ($state->localarch ne $state->arch) {
			$state->usage(
		    "Can't use -j if -A arch is not local architecture");
		}
		if ($state->opt('j') !~ m/^\d+$/) {
			$state->usage("-j takes a numerical argument");
		}
	}
	if ($state->opt('f') !~ m/^\d+$/) {
		$state->usage("-f takes a numerical argument");
	}
	if ($state->opt('f')) {
		$state->{want_fetchinfo} = 1;
	}
	if (!$state->{subst}->empty('HISTORY_ONLY')) {
		$state->{want_fetchinfo} = 1;
		$state->{opt}{f} = 0;
		$state->{opt}{j} = 1;
		$state->{opt}{e} = 1;
		$state->{all} = 1;
		$state->{scan_only} = 1;
		# XXX not really random, but no need to use dependencies
		$state->{random} = 1;
	}

	$state->{logdir} = $state->expand_path($state->{logdir});
	$state->{lockdir} = $state->expand_path($state->{lockdir});
	if ($state->opt('h')) {
		$state->{config} = $state->expand_path($state->opt('h'));
	}
	if (!$state->{subst}->value("NO_BUILD_STATS")) {
		push @{$state->{build_files}}, "%f/build-stats/%a";
	}
#	if (!$state->{xpaths}) {
#		$state->{xpaths} = ["%p/infrastructure/db/precious"];
#	}
	for my $cat (qw(build_files paths ipaths cpaths xpaths)) {
		next unless defined $state->{$cat};
		for my $f (@{$state->{$cat}}) {
			$f = $state->expand_path($f);
		}
	}
	$state->{size_log} = "%f/build-stats/%a-size";

	$state->{permanent_log} = $state->{build_files}[-1];
	$state->{size_log} = $state->expand_path($state->{size_log});
	$state->parse_size_file;

	$state->{logger} = DPB::Logger->new($state->logdir, $state->opt('c'));
	DPB::Limiter->setup($state->logger);
	$state->heuristics->set_logger($state->logger);
	$state->{display_timeout} =
	    $state->{subst}->value('DISPLAY_TIMEOUT') // 10;
	$state->{build_once} = $state->{all};
	if ($state->defines("DONT_BUILD_ONCE")) {
		$state->{build_once} = 0;
	}
	$state->{concurrent} = $state->{logger}->open("concurrent");
	$state->parse_config_files;
}

sub parse_config_files
{
	my $state = shift;

	my $override_prop = {};

	if ($state->opt('j')) {
		$override_prop->{jobs} = $state->opt('j');
	}
	if ($state->opt('p')) {
		$override_prop->{parallel} = $state->opt('p');
	}
	if ($state->define_present('STUCK_TIMEOUT')) {
		$override_prop->{stuck} = 
		    $state->{subst}->value('STUCK_TIMEOUT');
	}
	if ($state->define_present('FETCH_TIMEOUT')) {
		$override_prop->{fetch_timeout} = 
		    $state->{subst}->value('FETCH_TIMEOUT');
	}
	if ($state->define_present('SMALL_TIME')) {
		$override_prop->{small} = 
		    $state->{subst}->value('SMALL_TIME');
	}
	if ($state->define_present('CONNECTION_TIMEOUT')) {
		$override_prop->{timeout} = 
		    $state->{subst}->value('CONNECTION_TIMEOUT');
	}
	if ($state->define_present('WAIT_TIMEOUT')) {
		$override_prop->{wait_timeout} = 
		    $state->{subst}->value('WAIT_TIMEOUT');
	}
	if ($state->opt('J')) {
		$override_prop->{junk} = $state->opt('J');
	}
	if ($state->defines("ALWAYS_CLEAN")) {
		$override_prop->{always_clean} = 1;
	}
	if ($state->opt('M')) {
		$override_prop->{mem} = $state->opt('M');
	}

	my $default_prop = {
		junk => 150, 
		parallel => '/2',
		wait_timeout => 600,
		small => 120,
	};

	if ($state->{config}) {
		DPB::Core->parse_hosts_file($state->{config}, $state, 
		    $default_prop, $override_prop);
	}
	$state->{default_prop} = $default_prop;
	$state->{override_prop} = $override_prop;
}

sub start_cores
{
	my $state = shift;
	if (!$state->{config}) {
		my $prop = { %{$state->{default_prop}} };
		while (my ($k, $v) = each %{$state->{override_prop}}) {
			$prop->{$k} = $v;
		}

		DPB::Core::Factory->new('localhost', $prop);
	}
	DPB::Core::Factory->init_cores($state);
}

sub logger
{
	return shift->{logger};
}

sub heuristics
{
	return shift->{heuristics};
}

sub locker
{
	return shift->{locker};
}

sub stalelocks
{
	return shift->locker->{stalelocks};
}

sub builder
{
	return shift->{builder};
}

sub engine
{
	return shift->{engine};
}

sub grabber
{
	return shift->{grabber};
}

sub make
{
	return shift->{make};
}

sub make_args
{
	my $self = shift;
	my @l = ($self->{make});
	if ($self->{build_once}) {
		push(@l, 'BUILD_ONCE=Yes');
	}
	return @l;
}

sub ports
{
	return shift->{ports};
}

sub fullrepo
{
	return shift->{fullrepo};
}

sub distdir
{
	return shift->{distdir};
}

sub localarch
{
	return shift->{localarch};
}

sub arch
{
	return shift->{arch};
}

sub logdir
{
	return shift->{logdir};
}

sub parse_build_line
{
	return split(/\s+/, shift);
}

sub parse_build_file
{
	my ($state, $fname) = @_;
	if (!-f $fname) {
		my $arch = $state->arch;
		if (-f "$fname/$arch/build.log") {
			$fname = "$fname/$arch/build.log";
		} elsif (-f "$fname/build.log") {
			$fname = "$fname/build.log";
		}
	}
	open my $fh, '<', $fname or return;
	my $_;
	while (<$fh>) {
		chomp;
		next if $_ =~ m/!$/;
		my ($pkgpath, $host, $time, $sz, @rest) = parse_build_line($_);
		next if !defined $sz;
		my $o = DPB::PkgPath->new($pkgpath);
		push(@{$o->{stats}}, {host => $host, time => $time, sz => $sz});
	}
}

sub add_build_info
{
	my ($state, @consumers) = @_;
	for my $p (DPB::PkgPath->seen) {
		next unless defined $p->{stats};
		my ($i, $time, $sz, $host);
		for my $s (@{$p->{stats}}) {
			$time += $s->{time};
			$sz += $s->{sz};
			$i++;
			$host = $s->{host}; # XXX
		}
		for my $c (@consumers) {
			$c->add_build_info($p, $host, $time/$i, $sz/$i);
		}
	}
}

sub rewrite_build_info
{
	my $state = shift;
	File::Path::mkpath(File::Basename::dirname($state->{permanent_log}));
	open my $f, '>', $state->{permanent_log}.'.part' or return;
	for my $p (sort {$a->fullpkgpath cmp $b->fullpkgpath}
	    DPB::PkgPath->seen) {
		next unless defined $p->{stats};
		shift @{$p->{stats}} while @{$p->{stats}} > 10;
		for my $s (@{$p->{stats}}) {
			print $f join(' ', $p->fullpkgpath, $s->{host},
			    $s->{time}, $s->{sz}), "\n";
		}
		delete $p->{stats};
	}
	close $f;
	rename $state->{permanent_log}.'.part', $state->{permanent_log};
}

sub handle_build_files
{
	my $state = shift;
	return if $state->{fetch_only};
	return unless defined $state->{build_files};
	print "Reading build stats...";
	for my $file (@{$state->{build_files}}) {
		$state->parse_build_file($file);
	}
	$state->add_build_info($state->heuristics, "DPB::Job::Port");
	print "zapping old stuff...";
	$state->rewrite_build_info($state->{permanent_log});
	print "Done\n";
	$state->heuristics->finished_parsing;
}

sub parse_size_file
{
	my $state = shift;
	return if $state->{fetch_only};
	open my $fh, '<', $state->opt('S') // $state->{size_log}  or return;

	print "Reading size stats...";
	File::Path::mkpath(File::Basename::dirname($state->{size_log}));

	my $rewrite = {};
	my $_;
	while (<$fh>) {
		chomp;
		my $pkgname;
		my ($pkgpath, $sz, $sz2) = split(/\s+/, $_);
		my $i = " $sz";
		if ($pkgpath =~ m/^(.*)\((.*)\)$/) {
			($pkgpath, $pkgname) = ($1, $2);
			if ($state->opt('S')) {
				undef $pkgname;
			} else {
				$i ="($pkgname) $sz";
			}
		}
		if (defined $sz2) {
			$sz += $sz2;
			$i .=" $sz2";
		}
		$rewrite->{$pkgpath} = $i;
		my $o = DPB::PkgPath->new($pkgpath);
		DPB::Heuristics->add_size_info($o, $pkgname, $sz);
	}
	close $fh;
	print "zapping old stuff...";
	open $fh, '>', $state->{size_log}.'.part' or return;
	for my $p (sort keys %$rewrite) {
		print $fh "$p$rewrite->{$p}\n";
	}
	close $fh;
	print "Done\n";
	rename $state->{size_log}.'.part', $state->{size_log};
}

package main;


use DPB::PkgPath;
use DPB::Core;
use DPB::Vars;
use DPB::PortInfo;
use DPB::Engine;
use DPB::PortBuilder;
use DPB::Reporter;
use OpenBSD::Error;
use DPB::Locks;
use DPB::Job;
use DPB::Grabber;

my $keep_going = 1;

sub report
{
	return DPB::Util->time2string(time)." [$$]".
		($keep_going ? "" : " STOPPED!").
		"\n";
}

my $subdirlist = {};

my $state = DPB::State->new('dpb');
$state->handle_options;
$state->{locker} = DPB::Locks->new($state, $state->{lockdir});
$state->start_cores;

$state->{all} = 1;

my $default_handling =
    sub {
	my ($pkgpath, $weight) = @_;
	if (defined $weight) {
		$state->heuristics->set_weight($pkgpath);
	}
	$pkgpath->add_to_subdirlist($subdirlist);
	$state->{all} = 0;
};

$state->interpret_paths(@{$state->{paths}}, @ARGV,
    sub {
	&$default_handling(@_);
    });
$state->interpret_paths(@{$state->{ipaths}},
    sub {
	&$default_handling(@_);
	my $p = shift;
	$p->{wantinstall} = 1;
    });
$state->interpret_paths(@{$state->{cpaths}},
    sub {
	my $p = shift;
	$state->{dontclean}{$p->pkgpath} = 1;
    });

$state->interpret_paths(@{$state->{xpaths}},
    sub {
	my $p = shift;
	$p->{dontjunk} = 1;
    });

if ($state->opt('a')) {
	$state->{all} = 1;
}

$state->handle_build_files;

$state->{builder} = DPB::PortBuilder->new($state);

$state->{affinity} = DPB::Affinity->new($state, join("/", $state->logdir, "affinity"));
$state->{engine} = DPB::Engine->new($state);
$reporter = DPB::Reporter->new($state, "main", "DPB::Core", $state->engine);
while (!DPB::Core->avail) {
	DPB::Core->reap;
	sleep 1;
}
my $core = DPB::Core->get;
my $dump = DPB::Util->make_hot($state->logger->open('dump'));

my $last_time = time() - $state->{display_timeout};

sub handle_non_waiting_jobs
{
	my $need_clock = shift;
	my $checked = !$need_clock; # XXX
	my $force_report = 0;
	my $reaped = DPB::Core->reap;
	$keep_going = !-e $state->logdir."/stop";
	if (DPB::Core->avail > 1) {
		$state->engine->recheck_errors;
	}
	if (DPB::Core->avail) {
		$state->engine->check_buildable;
		$checked = 1;
	}
	while ($keep_going && DPB::Core->avail && $state->engine->can_build) {
		$state->engine->start_new_job;
		$force_report = 1;
	}
	while ($keep_going && DPB::Core::Fetcher->avail &&
	    $state->engine->can_fetch) {
	    	if (!$checked) {
			$state->engine->check_buildable;
			$checked = 1;
		}
		$state->engine->start_new_fetch;
		$force_report = 1;
	}
	my $current = time();
	DPB::Core->log_concurrency($current, $state->{concurrent});
	if ($need_clock) {
		if ($current >= $last_time + $state->{display_timeout} ||
		    $reaped) {
			$reporter->report($force_report);
			$last_time = $current;
		}
	} else {
		$reporter->report($force_report);
	}
}

sub main_loop
{
	while (1) {
		while (1) {
			handle_non_waiting_jobs(0);
			if (!DPB::Core->running) {
				last if !$keep_going;
				if (!$state->engine->can_build) {
					$state->engine->check_buildable(1);
					if (!$state->engine->can_build) {
						last;
					}
				}
			}
			if (DPB::Core->running) {
				DPB::Core->reap_wait;
			}
			if ($state->{fetch_only}) {
				if (!DPB::Core::Fetcher->running &&
				    (!$keep_going || !$state->engine->can_fetch)) {
					$state->engine->check_buildable;
					if (!$state->engine->can_fetch) {
						last;
					}
				}
			}
		}
		if (!$state->opt('q') || !$state->engine->recheck_errors) {
			last;
		}
	}
}

$state->{grabber} = DPB::Grabber->new($state,
    sub { handle_non_waiting_jobs(1) });

if ($state->{all} && !$state->{random}) {
	# when restarting interrupted dpb,
	# find the most important paths first
	my $list = $state->engine->find_best($state->logger->logfile("dependencies"), 10);
	# if we have them, list them before the full ports tree walk.
	if (@$list > 0) {
		my $actual = {};
		for my $name (@$list) {
			DPB::PkgPath->new($name)->add_to_subdirlist($actual);
		}
		$state->grabber->grab_subdirs($core, $actual);
	}
}

if (keys %$subdirlist > 0) {
	$state->grabber->grab_subdirs($core, $subdirlist);
}

$state->grabber->complete_subdirs($core);

if ($state->{all}) {
	$state->grabber->grab_subdirs($core);
}


$state->grabber->complete_subdirs($core);
# give back "our" core to the pool.

my $occupied = 0;

if ($state->{all}) {
	$state->engine->dump_dependencies;
	if (!$state->defines('NO_HISTORY')) {
		if ($state->grabber->expire_old_distfiles($core, 
		    $state->opt('e'))) {
			$occupied  = 1;
		}
	}
}

if (!$state->opt('e') && !$occupied) {
	$core->mark_ready;
}

$state->engine->check_buildable;

if ($state->{scan_only}) {
	# very shortened loop
	$reporter->report;
	if (DPB::Core->running) {
		DPB::Core->reap_wait;
	}
} else {
	# and let's wait for all jobs now.
	DPB::Core->start_clock($state->{display_timeout});
	main_loop();
}

$reporter->reset;
DPB::Core->cleanup;
print $state->engine->report;
$state->engine->end_dump($state->logger->open('dump'));