nixpkgs/pkgs/top-level/stage.nix
John Ericson 07a2b17cbf top-level: Split some of pkgs/top-level/default.nix to pkgs/top-level/stage.nix
This is preparation for the latter just building a single stage, and the
former building a package set with the bootstrapped stdenv.
2016-11-30 19:04:22 -05:00

108 lines
3.7 KiB
Nix

/* This file composes the Nix Packages collection. That is, it
imports the functions that build the various packages, and calls
them with appropriate arguments. The result is a set of all the
packages in the Nix Packages collection for some particular
platform. */
{ # The system (e.g., `i686-linux') for which to build the packages.
system
, # The standard environment to use. Only used for bootstrapping. If
# null, the default standard environment is used.
bootStdenv ? null
, # This is used because stdenv replacement and the stdenvCross do benefit from
# the overridden configuration provided by the user, as opposed to the normal
# bootstrapping stdenvs.
allowCustomOverrides ? (bootStdenv == null)
, # Non-GNU/Linux OSes are currently "impure" platforms, with their libc
# outside of the store. Thus, GCC, GFortran, & co. must always look for
# files in standard system directories (/usr/include, etc.)
noSysDirs ? (system != "x86_64-freebsd" && system != "i686-freebsd"
&& system != "x86_64-solaris"
&& system != "x86_64-kfreebsd-gnu")
, # The configuration attribute set
config
, crossSystem ? null
, platform
, lib
, nixpkgsFun
}:
let
stdenvAdapters = self: super:
let res = import ../stdenv/adapters.nix self; in res // {
stdenvAdapters = res;
};
trivialBuilders = self: super:
import ../build-support/trivial-builders.nix {
inherit lib; inherit (self) stdenv stdenvNoCC; inherit (self.xorg) lndir;
};
stdenvDefault = self: super:
import ./stdenv.nix {
inherit system bootStdenv crossSystem config platform lib nixpkgsFun;
};
allPackages = self: super:
let res = import ./all-packages.nix
{ inherit system noSysDirs config crossSystem platform lib nixpkgsFun; }
res self;
in res;
aliases = self: super: import ./aliases.nix super;
# stdenvOverrides is used to avoid circular dependencies for building
# the standard build environment. This mechanism uses the override
# mechanism to implement some staged compilation of the stdenv.
#
# We don't want stdenv overrides in the case of cross-building, or
# otherwise the basic overridden packages will not be built with the
# crossStdenv adapter.
stdenvOverrides = self: super:
lib.optionalAttrs (crossSystem == null && super.stdenv ? overrides)
(super.stdenv.overrides super);
# Allow packages to be overridden globally via the `packageOverrides'
# configuration option, which must be a function that takes `pkgs'
# as an argument and returns a set of new or overridden packages.
# The `packageOverrides' function is called with the *original*
# (un-overridden) set of packages, allowing packageOverrides
# attributes to refer to the original attributes (e.g. "foo =
# ... pkgs.foo ...").
configOverrides = self: super:
lib.optionalAttrs allowCustomOverrides
((config.packageOverrides or (super: {})) super);
# The complete chain of package set builders, applied from top to bottom
toFix = lib.foldl' (lib.flip lib.extends) (self: {}) [
stdenvAdapters
trivialBuilders
stdenvDefault
allPackages
aliases
stdenvOverrides
configOverrides
];
# Use `overridePackages` to easily override this package set.
# Warning: this function is very expensive and must not be used
# from within the nixpkgs repository.
#
# Example:
# pkgs.overridePackages (self: super: {
# foo = super.foo.override { ... };
# }
#
# The result is `pkgs' where all the derivations depending on `foo'
# will use the new version.
# Return the complete set of packages. Warning: this function is very
# expensive!
in lib.makeExtensibleWithCustomName "overridePackages" toFix