83 lines
1.8 KiB
Nix
83 lines
1.8 KiB
Nix
# produce a script to generate /etc
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{config, pkgs, ...}:
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###### interface
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let
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inherit (pkgs.lib) mkOption;
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option = {
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environment.etc = mkOption {
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default = [];
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example = [
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{ source = "/nix/store/.../etc/dir/file.conf.example";
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target = "dir/file.conf";
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mode = "0440";
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}
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];
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description = ''
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List of files that have to be linked in /etc.
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'';
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};
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};
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in
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###### implementation
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let
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copyScript = {source, target, mode ? "644", own ? "root.root"}:
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assert target != "nixos";
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''
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source="${source}"
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target="/etc/${target}"
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mkdir -p $(dirname "$target")
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test -e "$target" && rm -f "$target"
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cp "$source" "$target"
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chown ${own} "$target"
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chmod ${mode} "$target"
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'';
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makeEtc = pkgs.stdenv.mkDerivation {
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name = "etc";
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builder = ./make-etc.sh;
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inherit (pkgs) coreutils;
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/* !!! Use toXML. */
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sources = map (x: x.source) config.environment.etc;
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targets = map (x: x.target) config.environment.etc;
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modes = map (x: if x ? mode then x.mode else "symlink") config.environment.etc;
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};
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in
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{
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require = [option];
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system = {
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build = {
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etc = makeEtc;
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};
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activationScripts = {
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etc = pkgs.lib.fullDepEntry ''
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# Set up the statically computed bits of /etc.
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echo "setting up /etc..."
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if [ "$(readlink /etc/kill-etc)" != "${makeEtc}/bin/kill-etc" ]; then
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/etc/kill-etc || true
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${makeEtc}/bin/fill-etc
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echo -e "#! /bin/sh\n${makeEtc}/bin/kill-etc\n${makeEtc}/bin/fill-etc" > /etc/refill-etc
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chmod 0755 /etc/refill-etc
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echo "/etc is set up"
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else
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echo "/etc unchanged"
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fi
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'' [
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"systemConfig"
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"defaultPath" # path to cp, chmod, chown
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"stdio"
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];
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};
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};
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}
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