lib/Gruntmaster/Daemon/Format.pm

   1 package Gruntmaster::Daemon::Format;
   2
   3 use 5.014000;
   4 use strict;
   5 use warnings;
   6 use parent qw/Exporter/;
   7 no if $] > 5.017011, warnings => 'experimental::smartmatch';
   8
   9 use Digest::SHA qw/sha256_hex/;
  10 use Expect;
  11 use File::Basename qw/fileparse/;
  12 use File::Copy qw/cp/;
  13 use File::Slurp qw/read_file write_file/;
  14 use List::MoreUtils qw/natatime/;
  15 use Log::Log4perl qw/get_logger/;
  16 use String::ShellQuote qw/shell_quote/;
  17 use Try::Tiny;
  18
  19 our $VERSION = '5999.000_004';
  20 our @EXPORT_OK = qw/prepare_files stopvms/;
  21
  22 ##################################################
  23
  24 our (%vm, %pid);
  25
  26 sub runvm {
  27         my ($name, $arg) = @_;
  28         return unless $ENV{GRUNTMASTER_VM};
  29         my $cmd = $ENV{GRUNTMASTER_VM};
  30         $cmd .= ' ' . $arg if $arg;
  31         get_logger->trace("Starting VM $name ($cmd)");
  32         $vm{$name} = Expect->spawn($cmd);
  33         $vm{$name}->raw_pty(1);
  34         $vm{$name}->expect(5, '# ') or get_logger->logdie("Error while starting VM $name: ". $vm{$name}->error);
  35 }
  36
  37 sub stopvms {
  38         kill KILL => $_->pid for values %vm;
  39         %vm = %pid = ();
  40 }
  41
  42 sub execlist_finish {
  43         my ($vm, $kill) = @_;
  44
  45         if ($vm{$vm}) {
  46                 warn "Cannot kill VM" if $kill;
  47                 $vm{$vm}->expect(5, '# ');
  48         } else {
  49                 kill KILL => $pid{$vm} if $kill;
  50                 waitpid $pid{$vm}, 0;
  51         }
  52         return if $kill;
  53
  54         my $er = "exec-result-$vm";
  55         die "gruntmaster-exec died\n" if -z $er;
  56         my ($excode, $exmsg) = read_file $er;
  57         unlink $er;
  58         chomp ($excode, $exmsg); ## no critic (ProhibitParensWithBuiltins)
  59         get_logger->trace("Exec result from $vm: $excode $exmsg");
  60         die [$excode, $exmsg] if $excode; ## no critic (RequireCarping)
  61 }
  62
  63 sub execlist {
  64         my ($vm, @args) = @_;
  65         my $er = "exec-result-$vm";
  66         if ($vm{$vm}) {
  67                 my $cmd = ">$er " . shell_quote 'gruntmaster-exec', @args;
  68                 get_logger->trace("Running in VM $vm: $cmd");
  69                 $vm{$vm}->send($cmd);
  70         } else {
  71                 $pid{$vm} = fork // die "Cannot fork\n";
  72                 unless ($pid{$vm}) {
  73                         open STDOUT, '>', $er or die "Cannot open $er\n";
  74                         get_logger->trace("Running: gruntmaster-exec @args");
  75                         exec 'gruntmaster-exec', @args;
  76                 }
  77         }
  78 }
  79
  80 sub mkrun{
  81         my $format = shift;
  82         sub{
  83                 local *__ANON__ = 'mkrun_runner';
  84                 my ($name, %args) = @_;
  85                 get_logger->trace("Running $name...");
  86                 my $basename = fileparse $name, qr/[.][^.]*/s;
  87                 my @args = ('--sudo');
  88                 push @args, '--keep-stderr' if $ENV{TEST_VERBOSE};
  89                 push @args, '--timeout', $args{timeout} if $args{timeout};
  90                 push @args, '--mlimit',  $args{mlimit}  if $args{mlimit};
  91                 push @args, '--olimit',  $args{olimit}  if $args{olimit};
  92                 my @fds = exists $args{fds} ? @{$args{fds}} : ();
  93                 my $it = natatime 2, @fds;
  94                 while (my ($fd, $file) = $it->()) {
  95                         push @args, "--fd=$fd $file";
  96                 }
  97                 execlist $basename, @args, '--', "./$basename", @{$args{args}};
  98                 execlist_finish $basename unless $args{nonblocking}
  99         }
 100 }
 101
 102 sub prepare{
 103         my ($name, $format) = @_;
 104         get_logger->trace("Preparing file $name...");
 105
 106         try {
 107                 execlist prog => '--fd=1 >>errors', '--fd=2 >>errors', 'gruntmaster-compile', $format, $name;
 108                 execlist_finish 'prog';
 109         } catch {
 110                 my $exmsg = $_->[1];
 111                 die "Compile error ($exmsg)\n"
 112         } finally {
 113                 $Gruntmaster::Daemon::errors .= read_file 'errors';
 114                 $Gruntmaster::Daemon::errors .= "\n" if -s 'errors';
 115                 unlink 'errors';
 116         };
 117 }
 118
 119 sub prepare_files{
 120         my $meta = shift;
 121         if ($meta->{runner} eq 'Interactive') {
 122                 runvm ver => '-serial unix:vm.sock,nowait,server';
 123                 runvm prog => '-serial unix:vm.sock,nowait';
 124         } else {
 125                 runvm $_ for keys %{$meta->{files}};
 126         }
 127
 128         for my $file (values %{$meta->{files}}) {
 129                 my ($format, $name, $content) = @{$file}{qw/format name content/};
 130
 131                 $file->{run} = mkrun($format);
 132                 write_file $name, $content;
 133                 if ($ENV{GRUNTMASTER_CCACHE}) {
 134                         my $key = lc sha256_hex($content) . '-' . $format;
 135                         my $cachefn = "$ENV{GRUNTMASTER_CCACHE}/$key";
 136                         my $exefn = fileparse $name, qr/[.][^.]*/s;
 137                         if (cp $cachefn, $exefn) {
 138                                 get_logger->trace("File $name found in compilation cache")
 139                         } else {
 140                                 prepare $name, $format;
 141                                 cp $exefn, $cachefn
 142                         }
 143                 } else {
 144                         prepare $name, $format
 145                 }
 146         }
 147 }
 148
 149 1;
 150 __END__
 151
 152 =encoding utf-8
 153
 154 =head1 NAME
 155
 156 Gruntmaster::Daemon::Format - Utility functions for handling source files
 157
 158 =head1 SYNOPSIS
 159
 160   use Gruntmaster::Daemon::Format qw/prepare_files/;
 161   prepare_files { files => {
 162     prog => {
 163       name => 'prog.pl',
 164       format => 'PERL',
 165       content => 'print "Hello, world!"'
 166     },
 167     ver => {
 168       name => 'ver.cpp',
 169       format => 'CPP',
 170       content => ...
 171     },
 172   }};
 173
 174 =head1 DESCRIPTION
 175
 176 Gruntmaster::Daemon::Format exports utility functions for handling source files.
 177
 178 =over
 179
 180 =item B<prepare_files> I<$meta>
 181
 182 Compiles all the source files in C<< $meta->{files} >>.
 183
 184 =back
 185
 186 =head1 AUTHOR
 187
 188 Marius Gavrilescu E<lt>marius@ieval.roE<gt>
 189
 190 =head1 COPYRIGHT AND LICENSE
 191
 192 Copyright (C) 2014 by Marius Gavrilescu
 193
 194 This library is free software: you can redistribute it and/or modify
 195 it under the terms of the GNU Affero General Public License as published by
 196 the Free Software Foundation, either version 3 of the License, or
 197 (at your option) any later version.
 198
 199
 200 =cut