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nixpkgs/modules/rename.nix

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{pkgs, options, config, ...}:
let
alias = from: to: {
name = "Alias";
msg.use = x: x;
msg.define = x: x;
};
obsolete = from: to: {
name = "Obsolete name";
msg.use = x:
builtins.trace "Obsolete option `${from}' is used instead of `${to}'." x;
msg.define = x:
builtins.trace "Obsolete option `${from}' is defined instead of `${to}'." x;
};
deprecated = from: to: {
name = "Deprecated name";
msg.use = x:
abort "Deprecated option `${from}' is used instead of `${to}'.";
msg.define = x:
abort "Deprecated option `${from}' is defined instead of `${to}'.";
};
zipModules = list: with pkgs.lib;
zip (n: v:
if tail v != [] then
if n == "_type" then builtins.trace "Merge _type" (head v)
else if n == "extraConfigs" then builtins.trace "Merge extraConfigs" (concatLists v)
else if n == "description" || n == "apply" then
abort "Cannot rename an option to multiple options."
else zipModules v
else head v
) list;
rename = statusTemplate: from: to: with pkgs.lib;
let
status = statusTemplate from to;
setTo = setAttrByPath (splitString "." to);
setFrom = setAttrByPath (splitString "." from);
toOf = attrByPath (splitString "." to)
(abort "Renaming error: option `${to}' does not exists.");
fromOf = attrByPath (splitString "." from)
(abort "Internal error: option `${from}' should be declared.");
in
[{
options = setFrom (mkOption {
description = "${status.name} of <option>${to}</option>.";
apply = x: status.msg.use (toOf config);
});
}] ++
[{
options = setTo (mkOption {
extraConfigs =
let externalDefs = (fromOf options).definitions; in
if externalDefs == [] then []
else map (def: def.value) (status.msg.define externalDefs);
});
}];
in zipModules ([]
# usage example:
# ++ rename alias "services.xserver.slim.theme" "services.xserver.displayManager.slim.theme"
++ rename obsolete "environment.extraPackages" "environment.systemPackages"
# Old Grub-related options.
++ rename obsolete "boot.copyKernels" "boot.loader.grub.copyKernels"
++ rename obsolete "boot.extraGrubEntries" "boot.loader.grub.extraEntries"
++ rename obsolete "boot.extraGrubEntriesBeforeNixos" "boot.loader.grub.extraEntriesBeforeNixOS"
++ rename obsolete "boot.grubDevice" "boot.loader.grub.device"
++ rename obsolete "boot.bootMount" "boot.loader.grub.bootDevice"
++ rename obsolete "boot.grubSplashImage" "boot.loader.grub.splashImage"
++ rename obsolete "boot.initrd.extraKernelModules" "boot.initrd.kernelModules"
# OpenSSH
++ rename obsolete "services.sshd.ports" "services.openssh.ports"
++ rename alias "services.sshd.enable" "services.openssh.enable"
++ rename obsolete "services.sshd.allowSFTP" "services.openssh.allowSFTP"
++ rename obsolete "services.sshd.forwardX11" "services.openssh.forwardX11"
++ rename obsolete "services.sshd.gatewayPorts" "services.openssh.gatewayPorts"
++ rename obsolete "services.sshd.permitRootLogin" "services.openssh.permitRootLogin"
++ rename obsolete "services.xserver.startSSHAgent" "services.xserver.startOpenSSHAgent"
# KDE
++ rename deprecated "kde.extraPackages" "environment.kdePackages"
# ++ rename obsolete "environment.kdePackages" "environment.systemPackages" # !!! doesn't work!
) # do not add renaming after this.