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866cc3e792
There is a need for having sessionVariables set relative to the Nix Profiles. Such as in #68383.
100 lines
2.9 KiB
Nix
100 lines
2.9 KiB
Nix
# This module defines a system-wide environment that will be
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# initialised by pam_env (that is, not only in shells).
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.environment;
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pamProfiles =
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map
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(replaceStrings ["$HOME" "$USER"] ["@{HOME}" "@{PAM_USER}"])
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cfg.profiles;
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in
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{
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options = {
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environment.sessionVariables = mkOption {
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default = {};
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description = ''
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A set of environment variables used in the global environment.
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These variables will be set by PAM early in the login process.
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The value of each session variable can be either a string or a
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list of strings. The latter is concatenated, interspersed with
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colon characters.
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Note, due to limitations in the PAM format values may not
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contain the <literal>"</literal> character.
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Also, these variables are merged into
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<xref linkend="opt-environment.variables"/> and it is
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therefore not possible to use PAM style variables such as
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<code>@{HOME}</code>.
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'';
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type = with types; attrsOf (either str (listOf str));
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apply = mapAttrs (n: v: if isList v then concatStringsSep ":" v else v);
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};
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environment.profileRelativeSessionVariables = mkOption {
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type = types.attrsOf (types.listOf types.str);
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example = { PATH = [ "/bin" ]; MANPATH = [ "/man" "/share/man" ]; };
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description = ''
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Attribute set of environment variable used in the global
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environment. These variables will be set by PAM early in the
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login process.
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Variable substitution is available as described in
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<citerefentry>
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<refentrytitle>pam_env.conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</citerefentry>.
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Each attribute maps to a list of relative paths. Each relative
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path is appended to the each profile of
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<option>environment.profiles</option> to form the content of
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the corresponding environment variable.
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Also, these variables are merged into
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<xref linkend="opt-environment.profileRelativeEnvVars"/> and it is
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therefore not possible to use PAM style variables such as
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<code>@{HOME}</code>.
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'';
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};
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};
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config = {
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system.build.pamEnvironment =
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let
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suffixedVariables =
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flip mapAttrs cfg.profileRelativeSessionVariables (envVar: suffixes:
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flip concatMap pamProfiles (profile:
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map (suffix: "${profile}${suffix}") suffixes
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)
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);
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pamVariable = n: v:
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''${n} DEFAULT="${concatStringsSep ":" (toList v)}"'';
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pamVariables =
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concatStringsSep "\n"
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(mapAttrsToList pamVariable
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(zipAttrsWith (n: concatLists)
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[
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(mapAttrs (n: toList) cfg.sessionVariables)
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suffixedVariables
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]));
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in
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pkgs.writeText "pam-environment" "${pamVariables}\n";
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};
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}
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