mirror of
https://github.com/NixOS/nix.git
synced 2024-11-22 23:02:27 +00:00
228 lines
6.5 KiB
Plaintext
Executable File
228 lines
6.5 KiB
Plaintext
Executable File
#! @perl@ -w @perlFlags@
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use strict;
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use Nix::Config;
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use Nix::Store;
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use File::Temp qw(tempdir);
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my $dryRun = 0;
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my $verbose = 0;
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my $runEnv = 0;
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my @instArgs = ();
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my @buildArgs = ();
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my @exprs = ();
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my $shell = $ENV{SHELL} || "/bin/sh";
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my $envCommand = "p=\$PATH; source \$stdenv/setup; PATH=\$PATH:\$p; exec $shell";
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my @envExclude = ();
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my $tmpDir = tempdir("nix-build.XXXXXX", CLEANUP => 1, TMPDIR => 1)
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or die "cannot create a temporary directory";
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my $outLink = "./result";
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my $drvLink = "$tmpDir/derivation";
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# Ensure that the $tmpDir is deleted.
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$SIG{'INT'} = sub { exit 1 };
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for (my $n = 0; $n < scalar @ARGV; $n++) {
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my $arg = $ARGV[$n];
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if ($arg eq "--help") {
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print STDERR <<EOF;
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Usage: nix-build [OPTION]... [FILE]...
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`nix-build' builds the given Nix expressions (which
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default to ./default.nix if none are given). A symlink called
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`result' is placed in the current directory.
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Flags:
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--add-drv-link: create a symlink `derivation' to the store derivation
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--drv-link NAME: create symlink NAME instead of `derivation'
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--no-out-link: do not create the `result' symlink
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--out-link / -o NAME: create symlink NAME instead of `result'
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--attr / -A ATTR: select a specific attribute from the Nix expression
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--run-env: build dependencies of the specified derivation, then start a
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shell with the environment of the derivation
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--command: command to run with `--run-env'
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--exclude: regexp specifying dependencies to be excluded by `--run-env'
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Any additional flags are passed to `nix-store'.
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EOF
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exit 0;
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# '` hack
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}
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elsif ($arg eq "--version") {
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print "nix-build (Nix) $Nix::Config::version\n";
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exit 0;
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}
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elsif ($arg eq "--add-drv-link") {
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$drvLink = "./derivation";
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}
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elsif ($arg eq "--no-out-link" or $arg eq "--no-link") {
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$outLink = "$tmpDir/result";
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}
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elsif ($arg eq "--drv-link") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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$drvLink = $ARGV[$n];
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}
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elsif ($arg eq "--out-link" or $arg eq "-o") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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$outLink = $ARGV[$n];
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}
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elsif ($arg eq "--attr" or $arg eq "-A" or $arg eq "-I") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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push @instArgs, ($arg, $ARGV[$n]);
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}
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elsif ($arg eq "--arg" || $arg eq "--argstr") {
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die "$0: `$arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
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push @instArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
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$n += 2;
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}
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elsif ($arg eq "--log-type") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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push @instArgs, ($arg, $ARGV[$n]);
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push @buildArgs, ($arg, $ARGV[$n]);
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}
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elsif ($arg eq "--option") {
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die "$0: `$arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
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push @instArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
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push @buildArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
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$n += 2;
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}
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elsif ($arg eq "--max-jobs" or $arg eq "-j" or $arg eq "--max-silent-time" or $arg eq "--log-type" or $arg eq "--cores") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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push @buildArgs, ($arg, $ARGV[$n]);
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}
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elsif ($arg eq "--dry-run") {
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push @buildArgs, "--dry-run";
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$dryRun = 1;
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}
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elsif ($arg eq "--show-trace") {
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push @instArgs, $arg;
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}
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elsif ($arg eq "-") {
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@exprs = ("-");
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}
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elsif ($arg eq "--verbose" or substr($arg, 0, 2) eq "-v") {
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push @buildArgs, $arg;
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push @instArgs, $arg;
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$verbose = 1;
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}
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elsif ($arg eq "--quiet") {
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push @buildArgs, $arg;
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push @instArgs, $arg;
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}
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elsif ($arg eq "--run-env") {
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$runEnv = 1;
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}
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elsif ($arg eq "--command") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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$envCommand = $ARGV[$n];
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}
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elsif ($arg eq "--exclude") {
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$n++;
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die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
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push @envExclude, $ARGV[$n];
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}
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elsif (substr($arg, 0, 1) eq "-") {
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push @buildArgs, $arg;
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}
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else {
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push @exprs, $arg;
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}
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}
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@exprs = ("./default.nix") if scalar @exprs == 0;
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foreach my $expr (@exprs) {
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# Instantiate.
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my @drvPaths;
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# !!! 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;
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while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
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if (!close DRVPATHS) {
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die "nix-instantiate killed by signal " . ($? & 127) . "\n" if ($? & 127);
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exit 1;
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}
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if ($runEnv) {
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die "$0: ‘--run-env’ requires a single derivation\n" if scalar @drvPaths != 1;
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my $drvPath = readlink $drvPaths[0] or die "cannot read symlink `$drvPaths[0]'";
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my $drv = derivationFromPath($drvPath);
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# Build or fetch all dependencies of the derivation.
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my @inputDrvs = grep { my $x = $_; (grep { $x =~ $_ } @envExclude) == 0 } @{$drv->{inputDrvs}};
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system("$Nix::Config::binDir/nix-store -r @buildArgs @inputDrvs @{$drv->{inputSrcs}} > /dev/null") == 0
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or die "$0: failed to build all dependencies\n";
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# Set the environment.
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$ENV{'NIX_BUILD_TOP'} = $ENV{'TMPDIR'} || "/tmp";
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foreach (keys %{$drv->{env}}) {
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$ENV{$_} = $drv->{env}->{$_};
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}
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# Run a shell using the derivation's environment. For
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# convenience, source $stdenv/setup to setup additional
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# environment variables. Also don't lose the current $PATH
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# directories.
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exec($ENV{SHELL}, "-c", $envCommand);
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die;
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}
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foreach my $drvPath (@drvPaths) {
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my $target = readlink $drvPath or die "cannot read symlink `$drvPath'";
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print STDERR "derivation is $target\n" if $verbose;
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}
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# Build.
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my @outPaths;
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$pid = open(OUTPATHS, "-|") || exec "$Nix::Config::binDir/nix-store", "--add-root", $outLink, "--indirect", "-r",
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@buildArgs, @drvPaths;
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while (<OUTPATHS>) {chomp; push @outPaths, $_;}
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if (!close OUTPATHS) {
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die "nix-store killed by signal " . ($? & 127) . "\n" if ($? & 127);
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exit 1;
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}
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next if $dryRun;
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foreach my $outPath (@outPaths) {
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my $target = readlink $outPath or die "cannot read symlink `$outPath'";
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print "$target\n";
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}
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}
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