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https://github.com/NixOS/nixpkgs.git
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979117b6b8
For instance, if you don't want NixOS to emit /etc/hosts, you can say: environment.etc.hosts.enable = false;
117 lines
2.6 KiB
Nix
117 lines
2.6 KiB
Nix
# Management of static files in /etc.
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{ config, pkgs, ... }:
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with pkgs.lib;
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let
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etc' = filter (f: f.enable) (attrValues config.environment.etc);
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etc = pkgs.stdenv.mkDerivation {
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name = "etc";
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builder = ./make-etc.sh;
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preferLocalBuild = true;
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/* !!! Use toXML. */
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sources = map (x: x.source) etc';
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targets = map (x: x.target) etc';
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modes = map (x: x.mode) etc';
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};
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in
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{
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###### interface
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options = {
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environment.etc = mkOption {
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type = types.loaOf types.optionSet;
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default = {};
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example =
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{ hosts =
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{ source = "/nix/store/.../etc/dir/file.conf.example";
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mode = "0440";
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};
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"default/useradd".text = "GROUP=100 ...";
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};
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description = ''
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Set of files that have to be linked in <filename>/etc</filename>.
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'';
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options = singleton ({ name, config, ... }:
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{ options = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether this /etc file should be generated. This
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option allows specific /etc files to be disabled.
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'';
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};
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target = mkOption {
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description = ''
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Name of symlink (relative to
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<filename>/etc</filename>). Defaults to the attribute
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name.
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'';
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};
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text = mkOption {
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default = null;
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type = types.nullOr types.string;
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description = "Text of the file.";
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};
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source = mkOption {
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types = types.path;
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description = "Path of the source file.";
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};
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mode = mkOption {
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default = "symlink";
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example = "0600";
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description = ''
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If set to something else than <literal>symlink</literal>,
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the file is copied instead of symlinked, with the given
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file mode.
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'';
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};
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};
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config = {
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target = mkDefault name;
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source = mkIf (config.text != null)
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(mkDefault (pkgs.writeText "etc-file" config.text));
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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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system.build.etc = etc;
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system.activationScripts.etc = stringAfter [ "stdio" ]
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''
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# Set up the statically computed bits of /etc.
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echo "setting up /etc..."
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${pkgs.perl}/bin/perl ${./setup-etc.pl} ${etc}/etc
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'';
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};
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}
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