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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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102
nix/hm-modules.nix
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@ -211,53 +211,63 @@ in
};
};
config = lib.mkIf cfg.enable {
# 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.
'';
config = lib.mkIf cfg.enable (
let
finalConfigText =
# Support old string-based config during transition period
(
if builtins.isString cfg.settings then
cfg.settings
else
lib.optionalString (cfg.settings != { }) (
selflib.toMango {
topCommandsPrefixes = cfg.topPrefixes;
bottomCommandsPrefixes = cfg.bottomPrefixes;
} cfg.settings
)
)
+ lib.optionalString (cfg.extraConfig != "") cfg.extraConfig
+ lib.optionalString (cfg.autostart_sh != "") "\nexec-once=~/.config/mango/autostart.sh\n";
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
(
if builtins.isString cfg.settings then
cfg.settings
else
lib.optionalString (cfg.settings != { }) (
selflib.toMango {
topCommandsPrefixes = cfg.topPrefixes;
bottomCommandsPrefixes = cfg.bottomPrefixes;
} cfg.settings
)
)
+ lib.optionalString (cfg.extraConfig != "") cfg.extraConfig
+ lib.optionalString (cfg.autostart_sh != "") "\nexec-once=~/.config/mango/autostart.sh\n";
};
"mango/autostart.sh" = lib.mkIf (cfg.autostart_sh != "") {
source = autostart_sh;
executable = true;
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 != "") {
source = autostart_sh;
executable = true;
};
};
};
systemd.user.targets.mango-session = lib.mkIf cfg.systemd.enable {
Unit = {
Description = "mango compositor session";
Documentation = [ "man:systemd.special(7)" ];
BindsTo = [ "graphical-session.target" ];
Wants = [
"graphical-session-pre.target"
]
++ lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target";
After = [ "graphical-session-pre.target" ];
Before = lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target";
systemd.user.targets.mango-session = lib.mkIf cfg.systemd.enable {
Unit = {
Description = "mango compositor session";
Documentation = [ "man:systemd.special(7)" ];
BindsTo = [ "graphical-session.target" ];
Wants = [
"graphical-session-pre.target"
]
++ lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target";
After = [ "graphical-session-pre.target" ];
Before = lib.optional cfg.systemd.xdgAutostart "xdg-desktop-autostart.target";
};
};
};
};
}
);
}