commit 3d2fc01ccb3c9a8507c8ded8bfea32a3e566cfa7 (tree)
parent 78889cf07a518d4c019cdf4999da43f07f998307
Author: Motiejus Jakštys <motiejus@jakstys.lt>
Date: Tue, 27 Jan 2026 15:41:24 +0000
alpine
Diffstat:
| M | pkgs/mrescue.nix | | | 194 | +++++++++++++++++++------------------------------------------------------------ |
1 file changed, 46 insertions(+), 148 deletions(-)
diff --git a/pkgs/mrescue.nix b/pkgs/mrescue.nix
@@ -1,166 +1,64 @@
{
- lib,
pkgs,
+ stdenv,
+ fetchurl,
}:
-let
- # Minimal locale package with only en_US.UTF-8
- minimalLocales = pkgs.glibcLocales.override {
- allLocales = false;
- locales = [ "en_US.UTF-8/UTF-8" ];
- };
-
- # Simple halt script
- haltScript = pkgs.writeScriptBin "halt" ''
- #!${pkgs.bash}/bin/bash
- sync
- echo o > /proc/sysrq-trigger
- '';
+stdenv.mkDerivation rec {
+ pname = "mrescue";
+ version = "3.23.2";
- # Simple reboot script
- rebootScript = pkgs.writeScriptBin "reboot" ''
- #!${pkgs.bash}/bin/bash
- sync
- echo b > /proc/sysrq-trigger
- '';
+ src = fetchurl {
+ url = "https://dl-cdn.alpinelinux.org/alpine/v3.23/releases/x86_64/alpine-netboot-${version}-x86_64.tar.gz";
+ hash = "sha256-nFfzrPH1KI2R3OXBOluV7wB/hY63ImxWp/tyzBahpK0=";
+ };
- # Simple init script
- init = pkgs.writeScript "init" ''
- #!${pkgs.bash}/bin/bash
- set -e
+ nativeBuildInputs = with pkgs; [
+ gzip
+ cpio
+ squashfsTools
+ findutils
+ zstd
+ ];
- # Set up PATH first
- export PATH=/bin
- export HOME=/root
- export TERM=linux
+ sourceRoot = ".";
- # Set up UTF-8 locale
- export LOCALE_ARCHIVE=/lib/locale/locale-archive
- export LC_ALL=en_US.utf8
- export LANG=en_US.utf8
- export LC_CTYPE=en_US.utf8
+ unpackPhase = ''
+ runHook preUnpack
+ mkdir alpine-boot
+ tar -xzf $src -C alpine-boot --strip-components=1
+ runHook postUnpack
+ '';
- # Create mount points
- mkdir -p /proc /sys /dev /run /tmp
+ buildPhase = ''
+ runHook preBuild
- # Mount essential filesystems
- mount -t proc proc /proc
- mount -t sysfs sys /sys
- mount -t devtmpfs dev /dev
+ mkdir -p work/initramfs-extracted
+ cd work
- # Drop to rescue shell
- exec /bin/bash
- '';
+ gzip -dc < ../alpine-boot/initramfs-virt | \
+ cpio -idm --quiet -D initramfs-extracted
- # Packages to include (all binaries from each package will be included)
- packages = with pkgs; [
- vim
- bash
- less
- kmod
- tmux
- dhcpcd
- parted
- procps
- gnugrep
- iproute2
- findutils
- e2fsprogs
- dosfstools
- btrfs-progs
- util-linux
- uutils-coreutils-noprefix
- ];
+ unsquashfs -f -d modloop-extracted ../alpine-boot/modloop-virt >/dev/null
- # Generate binary entries for makeInitrdNG by auto-discovering all binaries
- binaryEntries =
- let
- # Collect all entries with package info
- allEntriesWithPkg = lib.flatten (
- map (
- pkg:
- let
- binDir = "${pkg}/bin";
- # Get all files in the bin directory
- binFiles = if builtins.pathExists binDir then builtins.attrNames (builtins.readDir binDir) else [ ];
- pkgName = pkg.name or (builtins.baseNameOf (builtins.toString pkg));
- in
- map (bin: {
- source = "${binDir}/${bin}";
- target = "/bin/${bin}";
- package = pkgName;
- binary = bin;
- }) binFiles
- ) packages
- );
+ mkdir -p initramfs-extracted/lib/modules
+ cp -r modloop-extracted/modules/* initramfs-extracted/lib/modules/
- # Build map of binary -> list of packages providing it
- binaryMap = lib.foldl' (
- acc: entry:
- let
- existing = acc.${entry.binary} or [ ];
- in
- acc // { ${entry.binary} = existing ++ [ entry.package ]; }
- ) { } allEntriesWithPkg;
+ cd initramfs-extracted
+ find * .[^.*] -print0 | sort -z | \
+ cpio --quiet -o -H newc -R +0:+0 --reproducible --null | \
+ zstd -15 -T0 > ../initramfs-combined.zst
- # Deduplicate by target path, keeping first occurrence and warning about duplicates
- deduped = lib.foldl' (
- acc: entry:
- let
- alreadyExists = builtins.any (e: e.target == entry.target) acc;
- providers = binaryMap.${entry.binary};
- hasDuplicates = builtins.length providers > 1;
- in
- if alreadyExists then
- acc
- else if hasDuplicates then
- builtins.trace
- "Warning: binary '${entry.binary}' provided by multiple packages: ${builtins.concatStringsSep ", " providers}. Chose: ${entry.package}"
- (acc ++ [ entry ])
- else
- acc ++ [ entry ]
- ) [ ] allEntriesWithPkg;
- in
- deduped;
+ runHook postBuild
+ '';
- initrd = pkgs.makeInitrdNG {
- name = "mrescue-initrd";
- compressor = "zstd";
- compressorArgs = [
- #"-19"
- "-12"
- "-T0"
- ];
+ installPhase = ''
+ runHook preInstall
- contents = [
- {
- source = init;
- target = "/init";
- }
- {
- source = "${pkgs.linuxPackages_latest.kernel.modules}/lib/modules";
- target = "/lib/modules";
- }
- {
- source = "${minimalLocales}/lib/locale/locale-archive";
- target = "/lib/locale/locale-archive";
- }
- {
- source = "${haltScript}/bin/halt";
- target = "/bin/halt";
- }
- {
- source = "${rebootScript}/bin/reboot";
- target = "/bin/reboot";
- }
- ]
- ++ binaryEntries; # makeInitrdNG will auto-resolve dependencies for these
- };
+ mkdir -p $out
+ install -Dm644 ../../alpine-boot/vmlinuz-virt $out/kernel
+ install -Dm644 ../initramfs-combined.zst $out/initramfs
-in
-# Package both kernel and initrd together
-pkgs.runCommand "mrescue" { } ''
- mkdir -p $out
- ln -s ${pkgs.linuxPackages_latest.kernel}/bzImage $out/bzImage
- ln -s ${initrd}/initrd $out/initrd
-''
+ runHook postInstall
+ '';
+}
