nixpkgs/system/system.nix

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{ platform ? __currentSystem
, stage2Init ? ""
, configuration
}:
rec {
# Make a configuration object from which we can retrieve option
# values.
config = import ./config.nix pkgs configuration;
pkgs = import ../pkgs/top-level/all-packages.nix {system = platform;};
pkgsDiet = import ../pkgs/top-level/all-packages.nix {
system = platform;
bootStdenv = pkgs.useDietLibC pkgs.stdenv;
};
pkgsStatic = import ../pkgs/top-level/all-packages.nix {
system = platform;
bootStdenv = pkgs.makeStaticBinaries pkgs.stdenv;
};
stdenvLinuxStuff = import ../pkgs/stdenv/linux {
system = pkgs.stdenv.system;
allPackages = import ../pkgs/top-level/all-packages.nix;
};
manifests = config.get ["installer" "manifests"]; # exported here because nixos-rebuild uses it
nix = pkgs.nixUnstable; # we need the exportReferencesGraph feature
useKernel = (config.get ["boot" "useKernel"]) pkgs;
rootModules =
(config.get ["boot" "initrd" "extraKernelModules"]) ++
(config.get ["boot" "initrd" "kernelModules"]);
# Determine the set of modules that we need to mount the root FS.
modulesClosure = import ../helpers/modules-closure.nix {
inherit (pkgs) stdenv module_init_tools;
kernel = useKernel;
inherit rootModules;
};
# 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.runCommand "extra-utils"
{ buildInputs = [pkgs.nukeReferences];
inherit (pkgsStatic) utillinux;
inherit (pkgsDiet) udev;
e2fsprogs = pkgs.e2fsprogsDiet;
devicemapper = if config.get ["boot" "initrd" "lvm"] then pkgs.devicemapperStatic else null;
lvm2 = if config.get ["boot" "initrd" "lvm"] then pkgs.lvm2Static else null;
allowedReferences = []; # prevent accidents like glibc being included in the initrd
}
"
ensureDir $out/bin
if test -n \"$devicemapper\"; then
cp $devicemapper/sbin/dmsetup.static $out/bin/dmsetup
cp $lvm2/sbin/lvm.static $out/bin/lvm
ln -s lvm $out/bin/vgscan
ln -s lvm $out/bin/vgchange
fi
cp $utillinux/bin/mount $utillinux/bin/umount $utillinux/sbin/pivot_root $out/bin
cp -p $e2fsprogs/sbin/fsck* $e2fsprogs/sbin/e2fsck $out/bin
cp $udev/sbin/udevd $udev/sbin/udevtrigger $udev/sbin/udevsettle $out/bin
nuke-refs $out/bin/*
";
# The init script of boot stage 1 (loading kernel modules for
# mounting the root FS).
bootStage1 = import ../boot/boot-stage-1.nix {
inherit (pkgs) substituteAll;
inherit (pkgsDiet) module_init_tools;
inherit extraUtils;
autoDetectRootDevice = config.get ["boot" "autoDetectRootDevice"];
fileSystems =
pkgs.lib.filter
(fs: fs.mountPoint == "/" || (fs ? neededForBoot && fs.neededForBoot))
(config.get ["fileSystems"]);
rootLabel = config.get ["boot" "rootLabel"];
inherit stage2Init;
modulesDir = modulesClosure;
modules = rootModules;
staticShell = 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 ../boot/make-initrd.nix {
inherit (pkgs) perl stdenv cpio;
contents = [
{ object = bootStage1;
symlink = "/init";
}
] ++ (if config.get ["boot" "initrd" "enableSplashScreen"] then [
{ object = pkgs.runCommand "splashutils" {} "
ensureDir $out/bin
cp ${pkgs.splashutils}/bin/splash_helper $out/bin
";
suffix = "/bin/splash_helper";
symlink = "/sbin/splash_helper";
}
{ object = import ../helpers/unpack-theme.nix {
inherit (pkgs) stdenv;
theme = config.get ["services" "ttyBackgrounds" "defaultTheme"];
};
symlink = "/etc/splash";
}
] else []);
};
# The installer.
nixosInstall = import ../installer/nixos-install.nix {
inherit (pkgs) perl runCommand substituteAll;
inherit nix;
nixpkgsURL = config.get ["installer" "nixpkgsURL"];
};
nixosRebuild = import ../installer/nixos-rebuild.nix {
inherit (pkgs) substituteAll;
};
nixosCheckout = import ../installer/nixos-checkout.nix {
inherit (pkgs) substituteAll;
};
# NSS modules. Hacky!
nssModules =
if config.get ["users" "ldap" "enable"] then [pkgs.nss_ldap] else [];
nssModulesPath = pkgs.lib.concatStrings (pkgs.lib.intersperse ":"
(map (mod: mod + "/lib") nssModules));
# Wrapper around modprobe to set the path to the modules.
modprobe = pkgs.substituteAll {
dir = "sbin";
src = ./modprobe;
isExecutable = true;
inherit (pkgs) module_init_tools;
kernel = useKernel;
};
# The services (Upstart) configuration for the system.
upstartJobs = import ../upstart-jobs/default.nix {
inherit config pkgs nix modprobe nssModulesPath;
};
# The static parts of /etc.
etc = import ../etc/default.nix {
inherit config pkgs upstartJobs systemPath wrapperDir defaultShell;
extraEtc = pkgs.lib.concatLists (map (job: job.extraEtc) upstartJobs.jobs);
};
# The wrapper setuid programs (since we can't have setuid programs
# in the Nix store).
wrapperDir = "/var/setuid-wrappers";
setuidWrapper = import ../helpers/setuid {
inherit (pkgs) stdenv;
inherit wrapperDir;
};
# The packages you want in the boot environment.
systemPathList = [
modprobe # must take precedence over module_init_tools
pkgs.bashInteractive # bash with ncurses support
pkgs.bzip2
pkgs.coreutils
pkgs.cpio
pkgs.cron
pkgs.curl
pkgs.e2fsprogs
pkgs.findutils
pkgs.glibc # for ldd, getent
pkgs.gnugrep
pkgs.gnused
pkgs.gnutar
pkgs.grub
pkgs.gzip
pkgs.iputils
pkgs.less
pkgs.lvm2
pkgs.man
pkgs.mdadm
pkgs.module_init_tools
pkgs.nano
pkgs.netcat
pkgs.nettools
pkgs.ntp
pkgs.openssh
pkgs.pciutils
pkgs.perl
pkgs.procps
pkgs.pwdutils
pkgs.rsync
pkgs.strace
pkgs.su
pkgs.sysklogd
pkgs.sysvtools
pkgs.time
pkgs.udev
pkgs.upstart
pkgs.utillinux
# pkgs.vim
pkgs.wirelesstools
nix
nixosInstall
nixosRebuild
nixosCheckout
setuidWrapper
]
++ pkgs.lib.concatLists (map (job: job.extraPath) upstartJobs.jobs)
++ (config.get ["environment" "extraPackages"]) pkgs;
# We don't want to put all of `startPath' and `path' in $PATH, since
# then we get an embarrassingly long $PATH. So use the user
# environment builder to make a directory with symlinks to those
# packages.
systemPath = pkgs.buildEnv {
name = "system-path";
paths = systemPathList;
pathsToLink = ["/bin" "/sbin" "/man" "/share"];
ignoreCollisions = true;
};
usersGroups = import ./users-groups.nix { inherit pkgs upstartJobs defaultShell; };
defaultShell = "/var/run/current-system/sw/bin/bash";
# The script that activates the configuration, i.e., it sets up
# /etc, accounts, etc. It doesn't do anything that can only be done
# at boot time (such as start `init').
activateConfiguration = pkgs.substituteAll {
src = ./activate-configuration.sh;
isExecutable = true;
inherit etc wrapperDir systemPath modprobe defaultShell;
kernel = useKernel;
readOnlyRoot = config.get ["boot" "readOnlyRoot"];
hostName = config.get ["networking" "hostName"];
setuidPrograms =
config.get ["security" "setuidPrograms"] ++
config.get ["security" "extraSetuidPrograms"];
maxJobs = config.get ["nix" "maxJobs"];
extraNixOptions = config.get ["nix" "extraOptions"];
inherit (usersGroups) createUsersGroups usersList groupsList;
path = [
pkgs.coreutils pkgs.gnugrep pkgs.findutils
pkgs.glibc # needed for getent
pkgs.pwdutils
];
bash = pkgs.bashInteractive;
};
# The init script of boot stage 2, which is supposed to do
# everything else to bring up the system.
bootStage2 = import ../boot/boot-stage-2.nix {
inherit (pkgs) substituteAll writeText coreutils
utillinux udev upstart;
kernel = useKernel;
inherit activateConfiguration;
readOnlyRoot = config.get ["boot" "readOnlyRoot"];
upstartPath = [
pkgs.coreutils
pkgs.findutils
pkgs.gnugrep
pkgs.gnused
pkgs.upstart
];
bootLocal = config.get ["boot" "localCommands"];
};
# Script to build the Grub menu containing the current and previous
# system configurations.
grubMenuBuilder = pkgs.substituteAll {
src = ../installer/grub-menu-builder.sh;
isExecutable = true;
inherit (pkgs) bash;
path = [pkgs.coreutils pkgs.gnused pkgs.gnugrep];
copyKernels = config.get ["boot" "copyKernels"];
extraGrubEntries = config.get ["boot" "extraGrubEntries"];
};
# Putting it all together. This builds a store object containing
# symlinks to the various parts of the built configuration (the
# kernel, the Upstart services, the init scripts, etc.) as well as a
# script `switch-to-configuration' that activates the configuration
# and makes it bootable.
system = pkgs.stdenv.mkDerivation {
name = "system";
builder = ./system.sh;
switchToConfiguration = ./switch-to-configuration.sh;
inherit (pkgs) grub coreutils gnused gnugrep diffutils findutils;
grubDevice = config.get ["boot" "grubDevice"];
kernelParams =
(config.get ["boot" "kernelParams"]) ++
(config.get ["boot" "extraKernelParams"]);
inherit bootStage2;
inherit activateConfiguration;
inherit grubMenuBuilder;
inherit etc;
inherit systemPath;
kernel = useKernel + "/vmlinuz";
initrd = initialRamdisk + "/initrd";
# Most of these are needed by grub-install.
path = [
pkgs.coreutils
pkgs.gnused
pkgs.gnugrep
pkgs.findutils
pkgs.diffutils
pkgs.upstart # for initctl
];
configurationName = config.get ["boot" "configurationName"];
};
}