93 lines
3.6 KiB
Nix
93 lines
3.6 KiB
Nix
{ config, lib, pkgs, mobile-nixos, utils, ... }:
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let
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# return true if super starts with sub
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startsWith = super: sub: (
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(builtins.substring 0 (builtins.stringLength sub) super) == sub
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);
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# return the (string) path to get from `stem` to `path`
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relPath = stem: path: (
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builtins.head (builtins.match "^${stem}(.+)" path)
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);
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fileSystems = config.fileSystems;
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bootFs = fileSystems."/boot";
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nixFs = fileSystems."/nix/store" or fileSystems."/nix" or fileSystems."/";
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# resolves to e.g. "nix/store", "/store" or ""
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storeRelPath = relPath nixFs.mountPoint "/nix/store";
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# return a list of all the `device` values -- one for each fileSystems."$x"
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devices = builtins.attrValues (builtins.mapAttrs (mount: entry: entry.device) fileSystems);
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# filter the devices to just those which sit under nixFs
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subNixMounts = builtins.filter (a: startsWith (builtins.toString a) nixFs.mountPoint) devices;
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# e.g. ["/nix/persist/var"] -> ["/persist/var"] if nixFs sits at /nix
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subNixRelMounts = builtins.map (m: relPath nixFs.mountPoint m) subNixMounts;
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makeSubNixMounts = builtins.toString (builtins.map (m: "mkdir -p ./${m};") subNixRelMounts);
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uuidFromFs = fs: builtins.head (builtins.match "/dev/disk/by-uuid/(.+)" fs.device);
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vfatUuidFromFs = fs: builtins.replaceStrings ["-"] [""] (uuidFromFs fs);
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fsBuilderMapBoot = {
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"vfat" = pkgs.imageBuilder.fileSystem.makeESP;
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};
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fsBuilderMapNix = {
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"ext4" = pkgs.imageBuilder.fileSystem.makeExt4;
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"btrfs" = pkgs.imageBuilder.fileSystem.makeBtrfs;
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};
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in
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{
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system.build.img-without-firmware = with pkgs; imageBuilder.diskImage.makeGPT {
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name = "nixos";
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diskID = vfatUuidFromFs bootFs;
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# headerHole = imageBuilder.size.MiB 16;
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partitions = [
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(fsBuilderMapBoot."${bootFs.fsType}" {
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# fs properties
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name = "ESP";
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partitionID = vfatUuidFromFs bootFs;
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# partition properties
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partitionLabel = "EFI System";
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partitionUUID = "44444444-4444-4444-4444-4444${vfatUuidFromFs bootFs}";
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size = imageBuilder.size.MiB 256;
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populateCommands = ''
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echo "running installBootLoader"
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${config.system.build.installBootLoader} ${config.system.build.toplevel} -d .
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echo "ran installBootLoader"
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'';
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})
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(fsBuilderMapNix."${nixFs.fsType}" {
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# fs properties
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name = "NIXOS_SYSTEM";
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partitionID = uuidFromFs nixFs;
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# partition properties
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partitionLabel = "Linux filesystem";
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partitionUUID = uuidFromFs nixFs;
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populateCommands =
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let
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closureInfo = buildPackages.closureInfo { rootPaths = config.system.build.toplevel; };
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in
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''
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mkdir -p ./${storeRelPath}
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# TODO: we should either fix up the owners (and perms?), or only create the bare minimum needed for boot (i.e. /var/*)
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${makeSubNixMounts}
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echo "Copying system closure..."
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while IFS= read -r path; do
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echo " Copying $path"
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cp -prf "$path" ./${storeRelPath}
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done < "${closureInfo}/store-paths"
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echo "Done copying system closure..."
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cp -v ${closureInfo}/registration ./nix-path-registration
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'';
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})
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];
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};
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system.build.img = lib.mkDefault config.system.build.img-without-firmware;
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# TODO: pinephone build:
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# system.build.img = pkgs.runCommandNoCC "nixos_full-disk-image.img" {} ''
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# cp -v ${config.system.build.without-bootloader}/nixos.img $out
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# chmod +w $out
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# dd if=${pkgs.tow-boot-pinephone}/Tow-Boot.noenv.bin of=$out bs=1024 seek=8 conv=notrunc
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# '';
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}
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