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nixos/config: add defaultPackages option #97171

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Sep 8, 2020
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nixos/config: add defaultPackages option #97171

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6 changes: 5 additions & 1 deletion nixos/doc/manual/release-notes/rl-2009.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -1016,7 +1016,11 @@ services.transmission.settings.rpc-bind-address = "0.0.0.0";
<para>
Nginx module <literal>nginxModules.fastcgi-cache-purge</literal> renamed to official name <literal>nginxModules.cache-purge</literal>.
Nginx module <literal>nginxModules.ngx_aws_auth</literal> renamed to official name <literal>nginxModules.aws-auth</literal>.
The packages <package>perl</package>, <package>rsync</package> and <package>strace</package> were removed from <option>systemPackages</option>. If you need them, install them again with <code><xref linkend="opt-environment.systemPackages"/> = with pkgs; [ perl rsync strace ];</code> in your <filename>configuration.nix</filename>.
</para>
</listitem>
<listitem>
<para>
The option <option>defaultPackages</option> was added. It installs the packages <package>perl</package>, <package>rsync</package> and <package>strace</package> for now. They were added unconditionally to <option>systemPackages</option> before, but are not strictly necessary for a minimal NixOS install. You can set it to an empty list to have a more minimal system. Be aware that some functionality might still have an impure dependency on those packages, so things might break.
</para>
</listitem>
<listitem>
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23 changes: 22 additions & 1 deletion nixos/modules/config/system-path.nix
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Expand Up @@ -41,6 +41,12 @@ let
pkgs.zstd
];

defaultPackages = map (pkg: setPrio ((pkg.meta.priority or 5) + 3) pkg)
[ pkgs.perl
pkgs.rsync
pkgs.strace
];
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in

{
Expand All @@ -63,6 +69,21 @@ in
'';
};

defaultPackages = mkOption {
type = types.listOf types.package;
default = defaultPackages;
example = literalExample "[]";
description = ''
Set of packages users expect from a minimal linux istall.
Like systemPackages, they appear in
/run/current-system/sw. These packages are
automatically available to all users, and are
automatically updated every time you rebuild the system
configuration.
If you want a more minimal system, set it to an empty list.
'';
};

pathsToLink = mkOption {
type = types.listOf types.str;
# Note: We need `/lib' to be among `pathsToLink' for NSS modules
Expand Down Expand Up @@ -102,7 +123,7 @@ in

config = {

environment.systemPackages = requiredPackages;
environment.systemPackages = requiredPackages ++ config.environment.defaultPackages;

environment.pathsToLink =
[ "/bin"
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