mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-26 07:46:21 +02:00
* Add build-remote.pl to the Nix distribution.
This commit is contained in:
Eelco Dolstra
parent
6fc60e2060
commit
bfec245efa
2 changed files with 211 additions and 1 deletions
|
|
@ -4,7 +4,8 @@ bin_SCRIPTS = nix-collect-garbage \
|
|||
nix-pack-closure nix-unpack-closure \
|
||||
nix-copy-closure
|
||||
|
||||
noinst_SCRIPTS = nix-profile.sh generate-patches.pl find-runtime-roots.pl
|
||||
noinst_SCRIPTS = nix-profile.sh generate-patches.pl \
|
||||
find-runtime-roots.pl build-remote.pl
|
||||
|
||||
nix-pull nix-push: readmanifest.pm readconfig.pm download-using-manifests.pl
|
||||
|
||||
|
|
@ -17,6 +18,7 @@ install-exec-local: readmanifest.pm download-using-manifests.pl find-runtime-roo
|
|||
$(INSTALL_PROGRAM) download-using-manifests.pl $(DESTDIR)$(libexecdir)/nix
|
||||
$(INSTALL_PROGRAM) find-runtime-roots.pl $(DESTDIR)$(libexecdir)/nix
|
||||
$(INSTALL_PROGRAM) generate-patches.pl $(DESTDIR)$(libexecdir)/nix
|
||||
$(INSTALL_PROGRAM) build-remote.pl $(DESTDIR)$(libexecdir)/nix
|
||||
$(INSTALL) -d $(DESTDIR)$(sysconfdir)/nix
|
||||
|
||||
include ../substitute.mk
|
||||
|
|
|
|||
208
scripts/build-remote.pl.in
Executable file
208
scripts/build-remote.pl.in
Executable file
|
|
@ -0,0 +1,208 @@
|
|||
#! @perl@ -w
|
||||
|
||||
use strict;
|
||||
use Fcntl ':flock';
|
||||
use English '-no_match_vars';
|
||||
|
||||
# General operation:
|
||||
#
|
||||
# Try to find a free machine of type $neededSystem. We do this as
|
||||
# follows:
|
||||
# - We acquire an exclusive lock on $currentLoad/main-lock.
|
||||
# - For each machine $machine of type $neededSystem and for each $slot
|
||||
# less than the maximum load for that machine, we try to get an
|
||||
# exclusive lock on $currentLoad/$machine-$slot (without blocking).
|
||||
# If we get such a lock, we send "accept" to the caller. Otherwise,
|
||||
# we send "postpone" and exit.
|
||||
# - We release the exclusive lock on $currentLoad/main-lock.
|
||||
# - We perform the build on $neededSystem.
|
||||
# - We release the exclusive lock on $currentLoad/$machine-$slot.
|
||||
#
|
||||
# The nice thing about this scheme is that if we die prematurely, the
|
||||
# locks are released automatically.
|
||||
|
||||
my $loadIncreased = 0;
|
||||
|
||||
my $amWilling = shift @ARGV;
|
||||
my $localSystem = shift @ARGV;
|
||||
my $neededSystem = shift @ARGV;
|
||||
my $drvPath = shift @ARGV;
|
||||
|
||||
sub sendReply {
|
||||
my $reply = shift;
|
||||
open OUT, ">&3" or die;
|
||||
print OUT "$reply\n";
|
||||
close OUT;
|
||||
}
|
||||
|
||||
sub decline {
|
||||
sendReply "decline";
|
||||
exit 0;
|
||||
}
|
||||
|
||||
my $currentLoad = $ENV{"NIX_CURRENT_LOAD"};
|
||||
decline unless defined $currentLoad;
|
||||
mkdir $currentLoad, 0777 or die unless -d $currentLoad;
|
||||
|
||||
my $conf = $ENV{"NIX_REMOTE_SYSTEMS"};
|
||||
decline if !defined $conf || ! -e $conf;
|
||||
|
||||
# Decline if the local system can do the build.
|
||||
decline if $amWilling && ($localSystem eq $neededSystem);
|
||||
|
||||
|
||||
# Otherwise find a willing remote machine.
|
||||
my %machines;
|
||||
my %systemTypes;
|
||||
my %sshKeys;
|
||||
my %maxJobs;
|
||||
my %curJobs;
|
||||
|
||||
|
||||
# Read the list of machines.
|
||||
open CONF, "< $conf" or die;
|
||||
|
||||
while (<CONF>) {
|
||||
chomp;
|
||||
s/\#.*$//g;
|
||||
next if /^\s*$/;
|
||||
/^\s*(\S+)\s+(\S+)\s+(\S+)\s+(\d+)\s*$/ or die;
|
||||
$machines{$1} = "";
|
||||
$systemTypes{$1} = $2;
|
||||
$sshKeys{$1} = $3;
|
||||
$maxJobs{$1} = $4;
|
||||
}
|
||||
|
||||
close CONF;
|
||||
|
||||
|
||||
# Acquire the exclusive lock on $currentLoad/main-lock.
|
||||
my $mainLock = "$currentLoad/main-lock";
|
||||
open MAINLOCK, ">>$mainLock" or die;
|
||||
flock(MAINLOCK, LOCK_EX) or die;
|
||||
|
||||
|
||||
# Find a suitable system.
|
||||
my $rightType = 0;
|
||||
my $machine;
|
||||
LOOP: foreach my $cur (keys %machines) {
|
||||
if ($neededSystem eq $systemTypes{$cur}) {
|
||||
$rightType = 1;
|
||||
|
||||
# We have a machine of the right type. Try to get a lock on
|
||||
# one of the machine's lock files.
|
||||
my $slot = 0;
|
||||
while ($slot < $maxJobs{$cur}) {
|
||||
my $slotLock = "$currentLoad/$cur-$slot";
|
||||
open SLOTLOCK, ">>$slotLock" or die;
|
||||
if (flock(SLOTLOCK, LOCK_EX | LOCK_NB)) {
|
||||
$machine = $cur;
|
||||
last LOOP;
|
||||
}
|
||||
close SLOTLOCK;
|
||||
$slot++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
close MAINLOCK;
|
||||
|
||||
|
||||
# Didn't find one?
|
||||
if (!defined $machine) {
|
||||
if ($rightType) {
|
||||
sendReply "postpone";
|
||||
exit 0;
|
||||
} else {
|
||||
decline;
|
||||
}
|
||||
}
|
||||
|
||||
# Yes we did, accept.
|
||||
sendReply "accept";
|
||||
open IN, "<&4" or die;
|
||||
my $x = <IN>;
|
||||
chomp $x;
|
||||
#print "got $x\n";
|
||||
close IN;
|
||||
|
||||
if ($x ne "okay") {
|
||||
exit 0;
|
||||
}
|
||||
|
||||
|
||||
# Do the actual job.
|
||||
print "BUILDING REMOTE: $drvPath on $machine\n";
|
||||
|
||||
# Make sure that we don't get any SSH passphrase or host key popups -
|
||||
# if there is any problem it should fail, not do something
|
||||
# interactive.
|
||||
$ENV{"DISPLAY"} = "";
|
||||
$ENV{"SSH_PASSWORD_FILE="} = "";
|
||||
$ENV{"SSH_ASKPASS="} = "";
|
||||
|
||||
my $sshOpts = "-i $sshKeys{$machine} -x";
|
||||
|
||||
# Hack to support Cygwin: if we login without a password, we don't
|
||||
# have exactly the same right as when we do. This causes the
|
||||
# Microsoft C compiler to fail with certain flags:
|
||||
#
|
||||
# http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=99676
|
||||
#
|
||||
# So as a workaround, we pass a verbatim password. ssh tries to makes
|
||||
# this very hard; the trick is to make it call SSH_ASKPASS to get the
|
||||
# password. (It only calls this command when there is no controlling
|
||||
# terminal, but Nix ensures that is is the case. When doing this
|
||||
# manually, use setsid(1).)
|
||||
if ($sshKeys{$machine} =~ /^password:/) {
|
||||
my $passwordFile = $sshKeys{$machine};
|
||||
$passwordFile =~ s/^password://;
|
||||
$sshOpts = "ssh -x";
|
||||
$ENV{"SSH_PASSWORD_FILE"} = $passwordFile;
|
||||
$ENV{"SSH_ASKPASS"} = "/tmp/writepass";
|
||||
|
||||
open WRITEPASS, ">/tmp/writepass" or die;
|
||||
print WRITEPASS "#! /bin/sh\ncat \"\$SSH_PASSWORD_FILE\"";
|
||||
close WRITEPASS;
|
||||
chmod 0755, "/tmp/writepass" or die;
|
||||
}
|
||||
|
||||
my $inputs = `cat inputs`; die if ($? != 0);
|
||||
$inputs =~ s/\n/ /g;
|
||||
|
||||
my $outputs = `cat outputs`; die if ($? != 0);
|
||||
$outputs =~ s/\n/ /g;
|
||||
|
||||
print "COPYING INPUTS...\n";
|
||||
|
||||
my $maybeSign = "";
|
||||
$maybeSign = "--sign" if -e "/nix/etc/nix/signing-key.sec";
|
||||
|
||||
system("NIX_SSHOPTS=\"$sshOpts\" nix-copy-closure $machine $maybeSign $drvPath $inputs") == 0
|
||||
or die "cannot copy inputs to $machine: $?";
|
||||
|
||||
print "BUILDING...\n";
|
||||
|
||||
system("ssh $sshOpts $machine 'nix-store -rvvK $drvPath'") == 0
|
||||
or die "remote build on $machine failed: $?";
|
||||
|
||||
print "REMOTE BUILD DONE: $drvPath on $machine\n";
|
||||
|
||||
foreach my $output (split '\n', $outputs) {
|
||||
my $maybeSignRemote = "";
|
||||
$maybeSignRemote = "--sign" if $UID != 0;
|
||||
|
||||
system("ssh $sshOpts $machine 'nix-store --export $maybeSignRemote $output' > dump") == 0
|
||||
or die "cannot copy $output from $machine: $?";
|
||||
|
||||
# This doesn't work yet, since the caller has a lock on the output
|
||||
# path. We should move towards lock-free invocation of build
|
||||
# hooks and substitutes.
|
||||
#system("nix-store --import < dump") == 0
|
||||
# or die "cannot import $output: $?";
|
||||
|
||||
# Hack: skip the first 8 bytes (the nix-store --export next
|
||||
# archive marker). The archive follows.
|
||||
system("(dd bs=1 count=8 of=/dev/null && cat) < dump | nix-store --restore $output") == 0
|
||||
or die "cannot restore $output: $?";
|
||||
}
|
||||
Loading…
Reference in a new issue