* In the installation CD, make the NixOS/Nixpkgs available as if they
were obtained from the NixOS channel. "nixos-install" copies this to the installed system as well. * In the installation CD, set GC_INITIAL_HEAP_SIZE to a low value for the benefit of memory-constrained environments. svn path=/nixos/trunk/; revision=33887
This commit is contained in:
parent
72990dae37
commit
6c1bb54483
6
lib/channel-expr.nix
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6
lib/channel-expr.nix
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@ -0,0 +1,6 @@
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{ system ? builtins.currentSystem }:
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{ pkgs =
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(import nixpkgs/default.nix { inherit system; })
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// { recurseForDerivations = true; };
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}
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@ -8,22 +8,20 @@ with pkgs.lib;
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let
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# We need a copy of the Nix expressions for Nixpkgs and NixOS on the
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# CD. We put them in a tarball because accessing that many small
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# files from a slow device like a CD-ROM takes too long. !!! Once
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# we use squashfs, maybe we won't need this anymore.
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makeTarball = tarName: input: pkgs.runCommand "tarball" {inherit tarName;}
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# CD. These are installed into the "nixos" channel of the root
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# user, as expected by nixos-rebuild/nixos-install.
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channelSources = pkgs.runCommand "nixos-${config.system.nixosVersion}"
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{ expr = builtins.readFile ../../../lib/channel-expr.nix; }
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''
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ensureDir $out
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(cd ${input} && tar cvfj $out/${tarName} . \
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--exclude '*~' --exclude 'result')
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mkdir -p $out/nixos
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cp -prd ${cleanSource ../../..} $out/nixos/nixos
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cp -prd ${cleanSource <nixpkgs>} $out/nixos/nixpkgs
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chmod -R u+w $out/nixos/nixos
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echo -n ${config.system.nixosVersion} > $out/nixos/nixos/.version
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echo -n "" > $out/nixos/nixos/.version-suffix
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echo "$expr" > $out/nixos/default.nix
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'';
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# Put the current directory in a tarball.
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nixosTarball = makeTarball "nixos.tar.bz2" (cleanSource ../../..);
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# Put Nixpkgs in a tarball.
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nixpkgsTarball = makeTarball "nixpkgs.tar.bz2" (cleanSource <nixpkgs>);
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includeSources = true;
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in
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boot.postBootCommands =
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''
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export PATH=${pkgs.gnutar}/bin:${pkgs.bzip2}/bin:$PATH
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# Provide the NixOS/Nixpkgs sources in /etc/nixos. This is required
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# for nixos-install.
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${optionalString includeSources ''
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echo "unpacking the NixOS/Nixpkgs sources..."
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mkdir -p /etc/nixos/nixos
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tar xjf ${nixosTarball}/nixos.tar.bz2 -C /etc/nixos/nixos
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mkdir -p /etc/nixos/nixpkgs
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tar xjf ${nixpkgsTarball}/nixpkgs.tar.bz2 -C /etc/nixos/nixpkgs
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chown -R root.root /etc/nixos
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echo -n ${config.system.nixosVersion} > /etc/nixos/nixos/.version
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echo -n "" > /etc/nixos/nixos/.version-suffix
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mkdir -p /nix/var/nix/profiles/per-user/root
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${config.environment.nix}/bin/nix-env -p /nix/var/nix/profiles/per-user/root/channels -i ${channelSources} --quiet
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mkdir -m 0700 -p /root/.nix-defexpr
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ln -s /nix/var/nix/profiles/per-user/root/channels /root/.nix-defexpr/channels
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''}
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# Make the installer more likely to succeed in low memory
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@ -103,7 +103,7 @@ export LC_TIME=
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# Create a temporary Nix config file that causes the nixbld users to
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# be used.
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echo "build-users-group = nixbld" > /mnt/tmp/nix.conf
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echo "build-users-group = nixbld" > $mountPoint/tmp/nix.conf
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export NIX_CONF_DIR=/tmp
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@ -141,45 +141,32 @@ for i in /nix/var/nix/manifests/*.nixmanifest; do
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done
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# Get the absolute path to the NixOS/Nixpkgs sources.
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srcs=$(nix-env -p /nix/var/nix/profiles/per-user/root/channels -q nixos --no-name --out-path)
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# Build the specified Nix expression in the target store and install
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# it into the system configuration profile.
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echo "building the system configuration..."
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NIX_PATH=nixpkgs=/mnt/etc/nixos/nixpkgs:nixos=/mnt/etc/nixos/nixos:nixos-config="/mnt$NIXOS_CONFIG" NIXOS_CONFIG= \
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NIX_PATH="/mnt$srcs/nixos:nixos-config=/mnt$NIXOS_CONFIG" NIXOS_CONFIG= \
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chroot $mountPoint @nix@/bin/nix-env \
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-p /nix/var/nix/profiles/system -f '<nixos>' --set -A system --show-trace
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# Get rid of the manifests.
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rm -f $mountPoint/nix/var/nix/manifests/*
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# We're done building/downloading, so we don't need the /etc bind
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# mount anymore. In fact, below we want to modify the target's /etc.
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umount $mountPoint/etc/nixos
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umount $mountPoint/etc
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# Make a backup of the old NixOS/Nixpkgs sources.
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echo "copying NixOS/Nixpkgs sources to /etc/nixos...."
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backupTimestamp=$(date "+%Y%m%d%H%M%S")
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targetNixos=$mountPoint/etc/nixos/nixos
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if test -e $targetNixos; then
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mv $targetNixos $targetNixos.backup-$backupTimestamp
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fi
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targetNixpkgs=$mountPoint/etc/nixos/nixpkgs
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if test -e $targetNixpkgs; then
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mv $targetNixpkgs $targetNixpkgs.backup-$backupTimestamp
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fi
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# Copy the NixOS/Nixpkgs sources to the target.
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cp -prd /etc/nixos/nixos $targetNixos
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if [ -e /etc/nixos/nixpkgs ]; then
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cp -prd /etc/nixos/nixpkgs $targetNixpkgs
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fi
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# Copy the NixOS/Nixpkgs sources to the target as the initial contents
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# of the NixOS channel.
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echo "copying NixOS/Nixpkgs sources..."
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mkdir -p $mountPoint/nix/var/nix/profiles/per-user/root
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chroot $mountPoint @nix@/bin/nix-env \
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-p /nix/var/nix/profiles/per-user/root/channels -i "$srcs" --quiet
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mkdir -m 0700 -p $mountPoint/root/.nix-defexpr
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ln -s /nix/var/nix/profiles/per-user/root/channels $mountPoint/root/.nix-defexpr/channels
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# Grub needs an mtab.
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relocatedModuleFiles =
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let
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relocateNixOS = path:
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"/etc/nixos/nixos" + removePrefix nixosPath (toString path);
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"<nixos" + removePrefix nixosPath (toString path) + ">";
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relocateOthers = null;
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in
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{ nixos = map relocateNixOS partitionedModuleFiles.nixos;
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# evaluated. So we'll just hope for the best.
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configClone = pkgs.writeText "configuration.nix"
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''
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{config, pkgs, ...}:
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{ config, pkgs, ... }:
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{
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require = [
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${toString config.installer.cloneConfigIncludes}
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];
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# Add your own options below and run "nixos-rebuild switch".
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# E.g.,
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# services.openssh.enable = true;
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}
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'';
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in
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'';
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};
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# Ignored. Kept for Backward compatibiliy.
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# you can retrieve the profiles which have been used by looking at the
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# list of modules use to configure the installation device.
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installer.configModule = mkOption {
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example = "./nixos/modules/installer/cd-dvd/installation-cd.nix";
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description = ''
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Filename of the configuration module that builds the CD
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configuration. Must be specified to support reconfiguration
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in live CDs.
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'';
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};
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};
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config = {
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# Enable wpa_supplicant, but don't start it by default.
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networking.wireless.enable = true;
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jobs.wpa_supplicant.startOn = pkgs.lib.mkOverride 50 "";
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# Tell the Nix evaluator to garbage collect more aggressively.
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# This is desirable in memory-constrained environments that don't
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# (yet) have swap set up.
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environment.shellInit =
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''
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export GC_INITIAL_HEAP_SIZE=100000
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'';
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};
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}
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environment.nix = mkOption {
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default = pkgs.nixUnstable;
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example = pkgs.nixCustomFun /root/nix.tar.gz;
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merge = mergeOneOption;
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description = "
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description = ''
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This option specifies the Nix package instance to use throughout the system.
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";
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'';
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};
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nix = {
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buildInputs = [ nixUnstable ];
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expr =
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''
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{ system ? builtins.currentSystem }:
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{ pkgs = (import nixpkgs/default.nix { inherit system; }) // { recurseForDerivations = true; }; }
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'';
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expr = builtins.readFile lib/channel-expr.nix;
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distPhase = ''
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echo -n $VERSION_SUFFIX > .version-suffix
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cp -prd . ../$releaseName/nixos
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cp -prd ${nixpkgs} ../$releaseName/nixpkgs
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echo "$expr" > ../$releaseName/default.nix
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echo nixos > ../$releaseName/channel-name
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NIX_STATE_DIR=$TMPDIR nix-env -f ../$releaseName/default.nix -qaP --meta --xml \* > /dev/null
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cd ..
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chmod -R u+w $releaseName
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# Test nix-env.
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$machine->mustFail("hello");
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$machine->mustSucceed("nix-env -f /etc/nixos/nixpkgs -i hello");
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$machine->mustSucceed("nix-env -i hello");
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$machine->mustSucceed("hello") =~ /Hello, world/
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or die "bad `hello' output";
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''}
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# !!! Idem.
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$machine->waitUntilSucceeds("cat /proc/swaps | grep -q /dev");
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$machine->mustSucceed("nix-env -f /etc/nixos/nixpkgs -i coreutils >&2");
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$machine->mustSucceed("nix-env -i coreutils >&2");
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$machine->mustSucceed("type -tP ls | tee /dev/stderr") =~ /.nix-profile/
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or die "nix-env failed";
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