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lix/scripts/nix-build.in

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#! @perl@ -w @perlFlags@
use strict;
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use Nix::Config;
use File::Temp qw(tempdir);
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my $dryRun = 0;
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my $verbose = 0;
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my @instArgs = ();
my @buildArgs = ();
my @exprs = ();
my $tmpDir = tempdir("nix-build.XXXXXX", CLEANUP => 1, TMPDIR => 1)
or die "cannot create a temporary directory";
my $outLink = "./result";
my $drvLink = "$tmpDir/derivation";
# Ensure that the $tmpDir is deleted.
$SIG{'INT'} = sub { exit 1 };
for (my $n = 0; $n < scalar @ARGV; $n++) {
my $arg = $ARGV[$n];
if ($arg eq "--help") {
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print STDERR <<EOF;
Usage: nix-build [OPTION]... [FILE]...
`nix-build' builds the given Nix expressions (which
default to ./default.nix if none are given). A symlink called
`result' is placed in the current directory.
Flags:
--add-drv-link: create a symlink `derivation' to the store derivation
--drv-link NAME: create symlink NAME instead of `derivation'
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--no-out-link: do not create the `result' symlink
--out-link / -o NAME: create symlink NAME instead of `result'
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--attr ATTR: select a specific attribution from the Nix expression
Any additional flags are passed to `nix-store'.
EOF
exit 0;
# '` hack
}
elsif ($arg eq "--add-drv-link") {
$drvLink = "./derivation";
}
elsif ($arg eq "--no-out-link" or $arg eq "--no-link") {
$outLink = "$tmpDir/result";
}
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" or $arg eq "-I") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
push @instArgs, ($arg, $ARGV[$n]);
}
elsif ($arg eq "--arg" || $arg eq "--argstr") {
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 "--log-type") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
push @instArgs, ($arg, $ARGV[$n]);
push @buildArgs, ($arg, $ARGV[$n]);
}
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elsif ($arg eq "--option") {
die "$0: `$arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
push @instArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
push @buildArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
$n += 2;
}
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elsif ($arg eq "--max-jobs" or $arg eq "-j" or $arg eq "--max-silent-time" or $arg eq "--log-type" or $arg eq "--cores") {
$n++;
die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
push @buildArgs, ($arg, $ARGV[$n]);
}
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elsif ($arg eq "--dry-run") {
push @buildArgs, "--dry-run";
$dryRun = 1;
}
elsif ($arg eq "--show-trace") {
push @instArgs, $arg;
}
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elsif ($arg eq "--verbose" or substr($arg, 0, 2) eq "-v") {
push @buildArgs, $arg;
push @instArgs, $arg;
$verbose = 1;
}
elsif ($arg eq "--quiet") {
push @buildArgs, $arg;
push @instArgs, $arg;
}
elsif (substr($arg, 0, 1) eq "-") {
push @buildArgs, $arg;
}
else {
push @exprs, $arg;
}
}
@exprs = ("./default.nix") if scalar @exprs == 0;
foreach my $expr (@exprs) {
# Instantiate.
my @drvPaths;
# !!! would prefer the perl 5.8.0 pipe open feature here.
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my $pid = open(DRVPATHS, "-|") || exec "$Nix::Config::binDir/nix-instantiate", "--add-root", $drvLink, "--indirect", @instArgs, $expr;
while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
if (!close DRVPATHS) {
die "nix-instantiate killed by signal " . ($? & 127) . "\n" if ($? & 127);
exit 1;
}
foreach my $drvPath (@drvPaths) {
my $target = readlink $drvPath or die "cannot read symlink `$drvPath'";
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print STDERR "derivation is $target\n" if $verbose;
}
# Build.
my @outPaths;
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$pid = open(OUTPATHS, "-|") || exec "$Nix::Config::binDir/nix-store", "--add-root", $outLink, "--indirect", "-r",
@buildArgs, @drvPaths;
while (<OUTPATHS>) {chomp; push @outPaths, $_;}
if (!close OUTPATHS) {
die "nix-store killed by signal " . ($? & 127) . "\n" if ($? & 127);
exit 1;
}
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next if $dryRun;
foreach my $outPath (@outPaths) {
my $target = readlink $outPath or die "cannot read symlink `$outPath'";
print "$target\n";
}
}