alexion
da30375413
Add disko as a flake input (following nixpkgs) and wire its NixOS module into the host-builder, so any Host can declare a disk layout while the layout itself stays a per-Host concern. neogaia's layout (hosts/neogaia/disk.nix): one GPT NVMe disk with a systemd-boot EFI system partition and a LUKS container holding btrfs with @root/@home/@nix subvolumes. The initrd prompts for the passphrase on a normal boot. Swap is RAM-backed zram, so there is no on-disk swap partition; zramSwap is enabled directly for now. The placeholder fileSystems are removed since disko now derives them.
85 lines
2.2 KiB
Nix
85 lines
2.2 KiB
Nix
{
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lib,
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inputs,
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self,
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}:
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let
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inherit (lib)
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attrNames
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filterAttrs
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genAttrs
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flatten
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hasSuffix
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mapAttrsToList
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;
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# --- Auto-loader ---------------------------------------------------------
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# Recursively collect every `.nix` file under `dir`, returned as a flat list
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# of paths suitable for a module `imports`: a directory recurses, a `.nix`
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# file is taken, anything else is skipped.
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collectNixFiles =
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dir:
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flatten (
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mapAttrsToList (
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name: type:
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let
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path = dir + "/${name}";
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in
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if type == "directory" then
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collectNixFiles path
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else if type == "regular" && hasSuffix ".nix" name then
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[ path ]
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else
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[ ]
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) (builtins.readDir dir)
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);
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# --- Host-builder --------------------------------------------------------
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# Build one Host: every Module is imported unconditionally (inert until its
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# `enable` flag is set), alongside home-manager, chaotic, the shared base,
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# and the Host's own directory.
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mkHost =
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{
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hostName,
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system ? "x86_64-linux",
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}:
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inputs.nixpkgs.lib.nixosSystem {
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inherit system;
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specialArgs = {
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inherit inputs;
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my = self.lib;
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};
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modules =
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(collectNixFiles (self + "/modules"))
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++ [
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inputs.home-manager.nixosModules.home-manager
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inputs.chaotic.nixosModules.default
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inputs.disko.nixosModules.disko
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(self + "/system")
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(self + "/hosts/${hostName}")
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{ networking.hostName = hostName; }
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];
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};
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# Discover every Host (a subdirectory of `hostsDir`) and build each one.
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mkHosts =
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hostsDir:
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let
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hostNames = attrNames (filterAttrs (_name: type: type == "directory") (builtins.readDir hostsDir));
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in
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genAttrs hostNames (hostName: mkHost { inherit hostName; });
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# --- Script-from-file helper --------------------------------------------
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# Turn a standalone script file into a package on PATH, keeping the script
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# itself editable as a real file rather than an inlined heredoc.
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scriptFromFile = pkgs: name: path: pkgs.writeShellScriptBin name (builtins.readFile path);
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in
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{
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inherit
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collectNixFiles
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mkHost
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mkHosts
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scriptFromFile
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;
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}
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