tvl-depot/scripts/nix-build.in
Eelco Dolstra 9dbfe242e3 * Kill a build if it has gone for more than a certain number of
seconds without producing output on stdout or stderr (NIX-65).  This
  timeout can be specified using the `--max-silent-time' option or the
  `build-max-silent-time' configuration setting.  The default is
  infinity (0).

* Fix a tricky race condition: if we kill the build user before the
  child has done its setuid() to the build user uid, then it won't be
  killed, and we'll potentially lock up in pid.wait().  So also send a
  conventional kill to the child.
2006-12-08 15:44:00 +00:00

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#! @perl@ -w -I@libexecdir@/nix
use strict;
my $addDrvLink = 0;
my $addOutLink = 1;
my $outLink;
my $drvLink;
my @instArgs = ();
my @buildArgs = ();
my @exprs = ();
END {
foreach my $fn (glob ".nix-build-tmp-*") {
unlink $fn;
}
}
sub intHandler {
exit 1;
}
$SIG{'INT'} = 'intHandler';
for (my $n = 0; $n < scalar @ARGV; $n++) {
my $arg = $ARGV[$n];
if ($arg eq "--help") {
print STDERR <<EOF;
Usage: nix-build [OPTION]... [FILE]...
`nix-build' builds the given Nix expressions (which
default to ./default.nix if none are given). A symlink called
`result' is placed in the current directory.
Flags:
--add-drv-link: create a symlink `derivation' to the store derivation
--drv-link NAME: create symlink NAME instead of `derivation'
--no-out-link: do not create the `result' symlink
--out-link / -o NAME: create symlink NAME instead of `result'
--attr ATTR: select a specific attribution from the Nix expression
Any additional flags are passed to `nix-store'.
EOF
exit 0;
# '` hack
}
elsif ($arg eq "--add-drv-link") {
$addDrvLink = 1;
}
elsif ($arg eq "--no-out-link" or $arg eq "--no-link") {
$addOutLink = 0;
}
elsif ($arg eq "--drv-link") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
$drvLink = $ARGV[$n];
}
elsif ($arg eq "--out-link" or $arg eq "-o") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
$outLink = $ARGV[$n];
}
elsif ($arg eq "--attr" or $arg eq "-A") {
$n++;
die "$0: `--attr' requires an argument\n" unless $n < scalar @ARGV;
push @instArgs, ("--attr", $ARGV[$n]);
}
elsif ($arg eq "--arg") {
die "$0: `--arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
push @instArgs, ("--arg", $ARGV[$n + 1], $ARGV[$n + 2]);
$n += 2;
}
elsif ($arg eq "--max-jobs" or $arg eq "-j" or $arg eq "--max-silent-time") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
push @buildArgs, ($arg, $ARGV[$n]);
}
elsif (substr($arg, 0, 1) eq "-") {
push @buildArgs, $arg;
}
else {
push @exprs, $arg;
}
}
@exprs = ("./default.nix") if scalar @exprs == 0;
if (!defined $drvLink) {
$drvLink = "derivation";
$drvLink = ".nix-build-tmp-" . $drvLink if !$addDrvLink;
}
if (!defined $outLink) {
$outLink = "result";
$outLink = ".nix-build-tmp-" . $outLink if !$addOutLink;
}
foreach my $expr (@exprs) {
# Instantiate.
my @drvPaths;
# !!! would prefer the perl 5.8.0 pipe open feature here.
my $pid = open(DRVPATHS, "-|") || exec "@bindir@/nix-instantiate", "--add-root", $drvLink, "--indirect", @instArgs, $expr;
while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
close DRVPATHS or exit 1;
foreach my $drvPath (@drvPaths) {
my $target = readlink $drvPath;
print STDERR "store derivation is $target\n";
}
# Build.
my @outPaths;
$pid = open(OUTPATHS, "-|") || exec "@bindir@/nix-store", "--add-root", $outLink, "--indirect", "-rv",
@buildArgs, @drvPaths;
while (<OUTPATHS>) {chomp; push @outPaths, $_;}
close OUTPATHS or exit 1;
foreach my $outPath (@outPaths) {
my $target = readlink $outPath;
print "$target\n";
}
}