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feat(nix): add build-time configuration validation

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Uses `pkgs.runCommand` in the home-manager module to parse and validate
the generated config file prior to deployment, preventing broken setups.
This commit is contained in:
Ananya Timalsina 2026-03-01 15:40:25 +01:00
parent 5396ec13c2
commit 1f8f4cc2f8
1 changed files with 56 additions and 46 deletions
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42
nix/hm-modules.nix
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@ -211,21 +211,9 @@ in
}; };
}; };
config = lib.mkIf cfg.enable { config = lib.mkIf cfg.enable (
# Backwards compatibility warning for old string-based config let
warnings = lib.optional (builtins.isString cfg.settings) '' finalConfigText =
wayland.windowManager.mango.settings: Using a string for settings is deprecated.
Please migrate to the new structured attribute set format.
See the module documentation for examples, or use the 'extraConfig' option for raw config strings.
The old string format will be removed in a future release.
'';
home.packages = [ cfg.package ];
xdg.configFile = {
"mango/config.conf" =
lib.mkIf (cfg.settings != { } || cfg.extraConfig != "" || cfg.autostart_sh != "")
{
text =
# Support old string-based config during transition period # Support old string-based config during transition period
( (
if builtins.isString cfg.settings then if builtins.isString cfg.settings then
@ -240,6 +228,27 @@ in
) )
+ lib.optionalString (cfg.extraConfig != "") cfg.extraConfig + lib.optionalString (cfg.extraConfig != "") cfg.extraConfig
+ lib.optionalString (cfg.autostart_sh != "") "\nexec-once=~/.config/mango/autostart.sh\n"; + lib.optionalString (cfg.autostart_sh != "") "\nexec-once=~/.config/mango/autostart.sh\n";
validatedConfig = pkgs.runCommand "mango-config.conf" { } ''
cp ${pkgs.writeText "mango-config.conf" finalConfigText} "$out"
${cfg.package}/bin/mango -c "$out" -p || exit 1
'';
in
{
# Backwards compatibility warning for old string-based config
warnings = lib.optional (builtins.isString cfg.settings) ''
wayland.windowManager.mango.settings: Using a string for settings is deprecated.
Please migrate to the new structured attribute set format.
See the module documentation for examples, or use the 'extraConfig' option for raw config strings.
The old string format will be removed in a future release.
'';
home.packages = [ cfg.package ];
xdg.configFile = {
"mango/config.conf" =
lib.mkIf (cfg.settings != { } || cfg.extraConfig != "" || cfg.autostart_sh != "")
{
source = validatedConfig;
}; };
"mango/autostart.sh" = lib.mkIf (cfg.autostart_sh != "") { "mango/autostart.sh" = lib.mkIf (cfg.autostart_sh != "") {
source = autostart_sh; source = autostart_sh;
@ -259,5 +268,6 @@ in
Before = lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target"; Before = lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target";
}; };
}; };
}; }
);
} }