* In the generation of machines.nix, support specifying a
speed factor and multiple system types. svn path=/nixos/trunk/; revision=17231
This commit is contained in:
Eelco Dolstra
parent
bd6fbce0f3
commit
70a10c1720
@ -2,22 +2,25 @@
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with pkgs.lib;
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###### interface
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let
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inherit (config.environment) nix;
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in
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{
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###### interface
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options = {
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environment = {
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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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This option specifies the Nix package instance to use throughout the system.
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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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This option specifies the Nix package instance to use throughout the system.
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";
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};
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nix = {
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@ -119,135 +122,126 @@ let
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example = "http://127.0.0.1:3128";
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};
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# Environment variables for running Nix.
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# !!! Fix description.
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# Environment variables for running Nix. !!! Misnomer - it's
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# actually a shell script.
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envVars = mkOption {
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internal = true;
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default = "";
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description = "
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Define the environment variables used by nix to
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";
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merge = pkgs.lib.mergeStringOption;
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# other option should be used to define the content instead of using
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# the apply function.
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apply = conf: ''
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export NIX_CONF_DIR=/nix/etc/nix
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# Enable the copy-from-other-stores substituter, which allows builds
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# to be sped up by copying build results from remote Nix stores. To
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# do this, mount the remote file system on a subdirectory of
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# /var/run/nix/remote-stores.
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export NIX_OTHER_STORES=/var/run/nix/remote-stores/*/nix
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'' + # */
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(if config.nix.distributedBuilds then
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''
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export NIX_BUILD_HOOK=${config.environment.nix}/libexec/nix/build-remote.pl
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export NIX_REMOTE_SYSTEMS=/etc/nix.machines
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export NIX_CURRENT_LOAD=/var/run/nix/current-load
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''
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else "")
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+
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(if config.nix.proxy != "" then
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''
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export http_proxy=${config.nix.proxy}
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export https_proxy=${config.nix.proxy}
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export ftp_proxy=${config.nix.proxy}
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''
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else "")
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+ conf;
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description = "
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Environment variables used by Nix.
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";
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};
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};
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};
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in
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###### implementation
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###### implementation
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let
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inherit (config.environment) nix;
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in
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config = {
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{
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require = [
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options
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];
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environment.etc =
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[ { # Nix configuration.
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source =
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let
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# Tricky: if we're using a chroot for builds, then we need
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# /bin/sh in the chroot (our own compromise to purity).
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# However, since /bin/sh is a symlink to some path in the
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# Nix store, which furthermore has runtime dependencies on
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# other paths in the store, we need the closure of /bin/sh
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# in `build-chroot-dirs' - otherwise any builder that uses
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# /bin/sh won't work.
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binshDeps = pkgs.writeReferencesToFile config.system.build.binsh;
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environment.etc =
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[ { # Nix configuration.
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source =
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let
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# Tricky: if we're using a chroot for builds, then we need
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# /bin/sh in the chroot (our own compromise to purity).
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# However, since /bin/sh is a symlink to some path in the
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# Nix store, which furthermore has runtime dependencies on
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# other paths in the store, we need the closure of /bin/sh
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# in `build-chroot-dirs' - otherwise any builder that uses
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# /bin/sh won't work.
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binshDeps = pkgs.writeReferencesToFile config.system.build.binsh;
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# Likewise, if chroots are turned on, we need Nix's own
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# closure in the chroot. Otherwise nix-channel and nix-env
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# won't work because the dependencies of its builders (like
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# coreutils and Perl) aren't visible. Sigh.
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nixDeps = pkgs.writeReferencesToFile config.environment.nix;
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in
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pkgs.runCommand "nix.conf" {extraOptions = config.nix.extraOptions; } ''
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extraPaths=$(for i in $(cat ${binshDeps} ${nixDeps}); do if test -d $i; then echo $i; fi; done)
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cat > $out <<END
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# WARNING: this file is generated.
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build-users-group = nixbld
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build-max-jobs = ${toString (config.nix.maxJobs)}
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build-use-chroot = ${if config.nix.useChroot then "true" else "false"}
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build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths)
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$extraOptions
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END
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'';
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target = "nix.conf"; # will be symlinked from /nix/etc/nix/nix.conf in activate-configuration.sh.
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}
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]
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# Likewise, if chroots are turned on, we need Nix's own
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# closure in the chroot. Otherwise nix-channel and nix-env
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# won't work because the dependencies of its builders (like
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# coreutils and Perl) aren't visible. Sigh.
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nixDeps = pkgs.writeReferencesToFile config.environment.nix;
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in
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pkgs.runCommand "nix.conf" {extraOptions = config.nix.extraOptions; } ''
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extraPaths=$(for i in $(cat ${binshDeps} ${nixDeps}); do if test -d $i; then echo $i; fi; done)
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cat > $out <<END
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# WARNING: this file is generated.
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build-users-group = nixbld
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build-max-jobs = ${toString (config.nix.maxJobs)}
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build-use-chroot = ${if config.nix.useChroot then "true" else "false"}
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build-chroot-dirs = /dev /dev/pts /proc /bin $(echo $extraPaths)
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$extraOptions
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END
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'';
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target = "nix.conf"; # will be symlinked from /nix/etc/nix/nix.conf in activate-configuration.sh.
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}
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]
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++ optional config.nix.distributedBuilds
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{ # List of machines for distributed Nix builds in the format expected
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# by build-remote.pl.
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source = pkgs.writeText "nix.machines"
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(pkgs.lib.concatStrings (map (machine:
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"${machine.sshUser}@${machine.hostName} "
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+ (if machine ? system then machine.system else concatStringsSep "," machine.systems)
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+ " ${machine.sshKey} ${toString machine.maxJobs} "
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+ (if machine ? speedFactor then toString machine.speedFactor else "1" )
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+ "\n"
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) config.nix.buildMachines));
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target = "nix.machines";
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};
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++ optional config.nix.distributedBuilds
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{ # List of machines for distributed Nix builds in the format expected
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# by build-remote.pl.
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source = pkgs.writeText "nix.machines"
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(pkgs.lib.concatStrings (map (machine:
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"${machine.sshUser}@${machine.hostName} ${machine.system} ${machine.sshKey} ${toString machine.maxJobs}\n"
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) config.nix.buildMachines));
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target = "nix.machines";
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jobs = pkgs.lib.singleton
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{ name = "nix-daemon";
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startOn = "startup";
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script =
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''
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export PATH=${if config.nix.distributedBuilds then "${pkgs.openssh}/bin:${pkgs.gzip}/bin:" else ""}${pkgs.openssl}/bin:${nix}/bin:$PATH
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${config.nix.envVars}
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exec nice -n ${builtins.toString config.nix.daemonNiceLevel} ${nix}/bin/nix-worker --daemon > /dev/null 2>&1
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'';
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extraConfig =
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''
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limit nofile 4096 4096
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'';
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};
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jobs = pkgs.lib.singleton
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{ name = "nix-daemon";
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environment.shellInit =
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''
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# Set up the environment variables for running Nix.
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${config.nix.envVars}
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startOn = "startup";
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# Set up secure multi-user builds: non-root users build through the
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# Nix daemon.
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if test "$USER" != root; then
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export NIX_REMOTE=daemon
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else
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export NIX_REMOTE=
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fi
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'';
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script =
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''
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export PATH=${if config.nix.distributedBuilds then "${pkgs.openssh}/bin:${pkgs.gzip}/bin:" else ""}${pkgs.openssl}/bin:${nix}/bin:$PATH
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${config.nix.envVars}
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exec nice -n ${builtins.toString config.nix.daemonNiceLevel} ${nix}/bin/nix-worker --daemon > /dev/null 2>&1
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'';
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nix.envVars =
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''
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export NIX_CONF_DIR=/nix/etc/nix
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extraConfig =
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''
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limit nofile 4096 4096
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'';
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};
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# Enable the copy-from-other-stores substituter, which allows builds
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# to be sped up by copying build results from remote Nix stores. To
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# do this, mount the remote file system on a subdirectory of
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# /var/run/nix/remote-stores.
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export NIX_OTHER_STORES=/var/run/nix/remote-stores/*/nix
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''
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+ optionalString config.nix.distributedBuilds ''
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export NIX_BUILD_HOOK=${config.environment.nix}/libexec/nix/build-remote.pl
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export NIX_REMOTE_SYSTEMS=/etc/nix.machines
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export NIX_CURRENT_LOAD=/var/run/nix/current-load
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''
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# !!! These should not be defined here, but in some general proxy configuration module!
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+ optionalString (config.nix.proxy != "") ''
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export http_proxy=${config.nix.proxy}
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export https_proxy=${config.nix.proxy}
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export ftp_proxy=${config.nix.proxy}
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'';
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environment.shellInit =
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''
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# Set up the environment variables for running Nix.
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${config.nix.envVars}
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};
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# Set up secure multi-user builds: non-root users build through the
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# Nix daemon.
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if test "$USER" != root; then
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export NIX_REMOTE=daemon
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else
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export NIX_REMOTE=
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fi
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'';
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}
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