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nixos-container: Pass through several Nix flags

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Since nixos-container calls nix-env / nix-build, it's useful to
support various evaluation-related options.
This commit is contained in:
Eelco Dolstra 2020-06-30 13:42:48 +02:00
parent 5abeb133de
commit ed49c901dd
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GPG key ID: 8170B4726D7198DE
1 changed files with 34 additions and 4 deletions
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38
pkgs/tools/virtualization/nixos-container/nixos-container.pl
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@ -5,7 +5,7 @@ use POSIX;
use File::Path;
use File::Slurp;
use Fcntl ':flock';
use Getopt::Long qw(:config gnu_getopt);
use Getopt::Long qw(:config gnu_getopt no_bundling);
use Cwd 'abs_path';
use Time::HiRes;
@ -68,6 +68,22 @@ my $localAddress;
my $flake;
my $flakeAttr = "container";
# Nix passthru flags.
my @nixFlags;
my @nixFlags2;
sub copyNixFlags0 { push @nixFlags, "--$_[0]"; }
sub copyNixFlags1 { push @nixFlags, "--$_[0]", $_[1]; }
# Ugly hack to handle flags that take two arguments, like --option.
sub copyNixFlags2 {
if (scalar(@nixFlags2) % 3 == 0) {
push @nixFlags2, "--$_[0]", $_[1];
} else {
push @nixFlags2, $_[1];
}
}
GetOptions(
"help" => sub { showHelp() },
"ensure-unique-name" => \$ensureUniqueName,
@ -82,8 +98,22 @@ GetOptions(
"host-address=s" => \$hostAddress,
"local-address=s" => \$localAddress,
"flake=s" => \$flake,
# Nix passthru options.
"log-format=s" => \&copyNixFlags1,
"option=s{2}" => \&copyNixFlags2,
"impure" => \&copyNixFlags0,
"update-input=s" => \&copyNixFlags1,
"override-input=s{2}" => \&copyNixFlags2,
"commit-lock-file" => \&copyNixFlags0,
"no-registries" => \&copyNixFlags0,
"no-update-lock-file" => \&copyNixFlags0,
"no-write-lock-file" => \&copyNixFlags0,
"no-allow-dirty" => \&copyNixFlags0,
"recreate-lock-file" => \&copyNixFlags0,
) or exit 1;
push @nixFlags, @nixFlags2;
if (defined $hostAddress and !defined $localAddress or defined $localAddress and !defined $hostAddress) {
die "With --host-address set, --local-address is required as well!";
}
@ -144,7 +174,7 @@ EOF
}
sub buildFlake {
system("nix", "build", "-o", "$systemPath.tmp", "--",
system("nix", "build", "-o", "$systemPath.tmp", @nixFlags, "--",
"$flake#nixosConfigurations.\"$flakeAttr\".config.system.build.toplevel") == 0
or die "$0: failed to build container from flake '$flake'\n";
$systemPath = readlink("$systemPath.tmp") or die;
@ -251,7 +281,7 @@ if ($action eq "create") {
system("nix-env", "-p", "$profileDir/system",
"-I", "nixos-config=$nixosConfigFile", "-f", "$nixenvF",
"--set", "-A", "system") == 0
"--set", "-A", "system", @nixFlags) == 0
or do {
clearContainerState($profileDir, "$profileDir/$containerName", $root, $confFile);
die "$0: failed to build initial container configuration\n"
@ -400,7 +430,7 @@ elsif ($action eq "update") {
my $nixenvF = $nixosPath // "<nixpkgs/nixos>";
system("nix-env", "-p", "$profileDir/system",
"-I", "nixos-config=$nixosConfigFile", "-f", $nixenvF,
"--set", "-A", "system") == 0
"--set", "-A", "system", @nixFlags) == 0
or die "$0: failed to build container configuration\n";
}