mirror of
https://github.com/NixOS/mobile-nixos.git
synced 2024-12-15 19:23:01 +03:00
94 lines
2.9 KiB
Nix
94 lines
2.9 KiB
Nix
# This provides `build.rootfs`, which is the rootfs image (ext4) built from
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# the current configuration.
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{ config, lib, pkgs, ... }:
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let
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inherit (config.boot) growPartition;
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inherit (lib) optionalString types;
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inherit (config.mobile._internal) compressLargeArtifacts;
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inherit (pkgs) buildPackages;
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rootfsLabel = config.mobile.generatedFilesystems.rootfs.label;
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in
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{
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boot.loader.grub.enable = false;
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boot.loader.generic-extlinux-compatible.enable = false;
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boot.growPartition = lib.mkDefault true;
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mobile.generatedFilesystems.rootfs = lib.mkDefault {
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type = "ext4";
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label = "NIXOS_SYSTEM";
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id = "44444444-4444-4444-8888-888888888888";
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populateCommands =
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let
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closureInfo = pkgs.buildPackages.closureInfo { rootPaths = config.system.build.toplevel; };
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in
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''
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mkdir -p ./nix/store
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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" ./nix/store
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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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# Give some headroom for initial mounting.
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extraPadding = pkgs.imageBuilder.size.MiB 20;
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# FIXME: See #117, move compression into the image builder.
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# Zstd can take a long time to complete successfully at high compression
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# levels. Increasing the compression level could lead to timeouts.
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postProcess = optionalString compressLargeArtifacts ''
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(PS4=" $ "; set -x
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PATH="$PATH:${buildPackages.zstd}/bin"
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cd $out
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ls -lh
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time zstd -10 --rm "$filename"
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ls -lh
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)
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'' + ''
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(PS4=" $ "; set -x
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mkdir $out/nix-support
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cat <<EOF > $out/nix-support/hydra-build-products
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file rootfs${optionalString compressLargeArtifacts "-zstd"} $out/$filename${optionalString compressLargeArtifacts ".zst"}
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EOF
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)
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'';
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zstd = compressLargeArtifacts;
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};
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boot.postBootCommands = ''
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# On the first boot do some maintenance tasks
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if [ -f /nix-path-registration ]; then
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# Register the contents of the initial Nix store
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${config.nix.package.out}/bin/nix-store --load-db < /nix-path-registration
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# nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag.
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touch /etc/NIXOS
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${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
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# Prevents this from running on later boots.
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rm -f /nix-path-registration
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fi
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'';
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fileSystems = {
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"/" = lib.mkDefault {
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device = "/dev/disk/by-label/${rootfsLabel}";
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fsType = "ext4";
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autoResize = true;
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};
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};
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# FIXME: Move this in a proper module + task for the filesystem.
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# This is a "wrong" assumption, that only holds through since we are setting
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# fileSystems."/".autoResize to true here.
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mobile.boot.stage-1.extraUtils = with pkgs; [
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{ package = e2fsprogs; }
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];
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}
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