nixpkgs/test/rescue-system.nix

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rec {
pkgs = import ./pkgs/top-level/all-packages.nix {};
pkgsDiet = import ./pkgs/top-level/all-packages.nix {
bootStdenv = pkgs.useDietLibC pkgs.stdenv;
};
pkgsStatic = import ./pkgs/top-level/all-packages.nix {
bootStdenv = pkgs.makeStaticBinaries pkgs.stdenv;
};
stdenvLinuxStuff = import ./pkgs/stdenv/linux {
system = pkgs.stdenv.system;
allPackages = import ./pkgs/top-level/all-packages.nix;
};
# Determine the set of modules that we need to mount the root FS.
modulesClosure = import ./modules-closure.nix {
inherit (pkgs) stdenv kernel module_init_tools;
rootModules = ["ide-cd" "ide-disk" "ide-generic"];
};
# Some additional utilities needed in stage 1, notably mount. We
# don't want to bring in all of util-linux, so we just copy what we
# need.
extraUtils = pkgs.stdenv.mkDerivation {
name = "extra-utils";
builder = builtins.toFile "builder.sh"
"source $stdenv/setup; ensureDir $out/bin; cp $utillinux/bin/mount $out/bin; nuke-refs $out/bin/mount";
buildInputs = [pkgs.nukeReferences];
inherit (pkgsStatic) utillinux;
};
# The init script of boot stage 1 (loading kernel modules for
# mounting the root FS).
bootStage1 = import ./boot-stage-1.nix {
inherit (pkgs) genericSubstituter;
inherit (pkgsDiet) module_init_tools;
inherit extraUtils;
modules = modulesClosure;
shell = stdenvLinuxStuff.bootstrapTools.bash;
staticTools = stdenvLinuxStuff.staticTools;
};
# The closure of the init script of boot stage 1 is what we put in
# the initial RAM disk.
initialRamdisk = import ./make-initrd.nix {
inherit (pkgs) stdenv cpio;
packages = [];
init = bootStage1;
};
# The init script of boot stage 2, which is supposed to do
# everything else to bring up the system.
bootStage2 = import ./boot-stage-2.nix {
inherit (pkgs) genericSubstituter coreutils utillinux;
shell = pkgs.bash + "/bin/sh";
};
# Since the CD is read-only, the mount points must be on disk.
cdMountPoints = pkgs.stdenv.mkDerivation {
name = "mount-points";
builder = builtins.toFile "builder.sh"
"source $stdenv/setup; mkdir $out; cd $out; mkdir proc sys tmp etc dev";
};
# Create an ISO image containing the isolinux boot loader, the
# kernel, and initrd produced above.
rescueCD = import ./make-iso9660-image.nix {
inherit (pkgs) stdenv cdrtools;
isoName = "nixos.iso";
contents = [
{ source = pkgs.syslinux + "/lib/syslinux/isolinux.bin";
target = "isolinux/isolinux.bin";
}
{ source = ./isolinux.cfg;
target = "isolinux/isolinux.cfg";
}
{ source = pkgs.kernel + "/vmlinuz";
target = "isolinux/vmlinuz";
}
{ source = initialRamdisk + "/initrd";
target = "isolinux/initrd";
}
{ source = cdMountPoints;
target = "/";
}
];
init = bootStage2;
bootable = true;
bootImage = "isolinux/isolinux.bin";
};
}