29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
85 lines
2.2 KiB
Nix
85 lines
2.2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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{
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###### interface
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options = {
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services.mingetty = {
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greetingLine = mkOption {
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type = types.str;
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default = ''<<< Welcome to NixOS ${config.system.nixosVersion} (\m) - \l >>>'';
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description = ''
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Welcome line printed by mingetty.
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'';
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};
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helpLine = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Help line printed by mingetty below the welcome line.
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Used by the installation CD to give some hints on
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how to proceed.
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'';
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};
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serialSpeed = mkOption {
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type = types.listOf types.int;
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default = [ 115200 57600 38400 9600 ];
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example = [ 38400 9600 ];
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description = ''
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Bitrates to allow for agetty's listening on serial ports. Listing more
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bitrates gives more interoperability but at the cost of long delays
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for getting a sync on the line.
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'';
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};
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};
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};
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###### implementation
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config = {
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systemd.services."getty@" =
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{ baseUnit = pkgs.runCommand "getty.service" {}
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''
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sed '/ExecStart/ d' < ${config.systemd.package}/example/systemd/system/getty@.service > $out
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'';
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serviceConfig.ExecStart = "@${pkgs.utillinux}/sbin/agetty agetty --noclear --login-program ${pkgs.shadow}/bin/login %I 38400";
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restartIfChanged = false;
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};
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systemd.services."serial-getty@" =
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{ baseUnit = pkgs.runCommand "serial-getty.service" {}
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''
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sed '/ExecStart/ d' < ${config.systemd.package}/example/systemd/system/serial-getty@.service > $out
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'';
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serviceConfig.ExecStart =
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let speeds = concatStringsSep "," (map toString config.services.mingetty.serialSpeed);
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in "@${pkgs.utillinux}/sbin/agetty agetty --login-program ${pkgs.shadow}/bin/login %I ${speeds}";
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restartIfChanged = false;
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};
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environment.etc = singleton
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{ # Friendly greeting on the virtual consoles.
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source = pkgs.writeText "issue" ''
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[1;32m${config.services.mingetty.greetingLine}[0m
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${config.services.mingetty.helpLine}
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'';
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target = "issue";
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};
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};
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}
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