fefa9ef756
The stdenvOverrides overlay is used to bring packages forward during bootstrapping via stdenv.overrides. These packages have already had the overlays applied to them in the previous boostrapping stage. If stdenvOverrides is not last in the overlays stack, all remaining overlays will windup being applied again to these packages. closes #34086
137 lines
4.9 KiB
Nix
137 lines
4.9 KiB
Nix
/* This file composes a single bootstrapping stage of the Nix Packages
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collection. That is, it imports the functions that build the various
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packages, and calls them with appropriate arguments. The result is a set of
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all the packages in the Nix Packages collection for some particular platform
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for some particular stage.
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Default arguments are only provided for bootstrapping
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arguments. Normal users should not import this directly but instead
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import `pkgs/default.nix` or `default.nix`. */
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{ ## Misc parameters kept the same for all stages
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##
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# Utility functions, could just import but passing in for efficiency
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lib
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, # Use to reevaluate Nixpkgs; a dirty hack that should be removed
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nixpkgsFun
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## Other parameters
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##
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, # The package set used at build-time. If null, `buildPackages` will
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# be defined internally as the final produced package set itself. This allows
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# us to avoid expensive splicing.
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buildPackages
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, # The package set used in the next stage. If null, `targetPackages` will be
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# defined internally as the final produced package set itself, just like with
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# `buildPackages` and for the same reasons.
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#
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# THIS IS A HACK for compilers that don't think critically about cross-
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# compilation. Please do *not* use unless you really know what you are doing.
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targetPackages
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, # The standard environment to use for building packages.
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stdenv
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, # This is used because stdenv replacement and the stdenvCross do benefit from
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# the overridden configuration provided by the user, as opposed to the normal
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# bootstrapping stdenvs.
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allowCustomOverrides
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, # Non-GNU/Linux OSes are currently "impure" platforms, with their libc
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# outside of the store. Thus, GCC, GFortran, & co. must always look for files
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# in standard system directories (/usr/include, etc.)
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noSysDirs ? stdenv.buildPlatform.system != "x86_64-freebsd"
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&& stdenv.buildPlatform.system != "i686-freebsd"
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&& stdenv.buildPlatform.system != "x86_64-solaris"
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&& stdenv.buildPlatform.system != "x86_64-kfreebsd-gnu"
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, # The configuration attribute set
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config
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, # A list of overlays (Additional `self: super: { .. }` customization
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# functions) to be fixed together in the produced package set
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overlays
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}:
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let
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stdenvAdapters = self: super:
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let res = import ../stdenv/adapters.nix self; in res // {
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stdenvAdapters = res;
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};
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trivialBuilders = self: super:
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import ../build-support/trivial-builders.nix {
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inherit lib; inherit (self) stdenv stdenvNoCC; inherit (self.xorg) lndir;
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};
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stdenvBootstappingAndPlatforms = self: super: {
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buildPackages = (if buildPackages == null then self else buildPackages)
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// { recurseForDerivations = false; };
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targetPackages = (if targetPackages == null then self else targetPackages)
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// { recurseForDerivations = false; };
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inherit stdenv;
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};
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# The old identifiers for cross-compiling. These should eventually be removed,
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# and the packages that rely on them refactored accordingly.
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platformCompat = self: super: let
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inherit (super.stdenv) buildPlatform hostPlatform targetPlatform;
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in {
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stdenv = super.stdenv // {
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inherit (super.stdenv.buildPlatform) platform;
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};
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inherit buildPlatform hostPlatform targetPlatform;
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inherit (buildPlatform) system platform;
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};
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splice = self: super: import ./splice.nix lib self (buildPackages != null);
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allPackages = self: super:
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let res = import ./all-packages.nix
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{ inherit lib nixpkgsFun noSysDirs config; }
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res self;
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in res;
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aliases = self: super: import ./aliases.nix super;
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# stdenvOverrides is used to avoid having multiple of versions
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# of certain dependencies that were used in bootstrapping the
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# standard environment.
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stdenvOverrides = self: super:
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(super.stdenv.overrides or (_: _: {})) self super;
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# Allow packages to be overridden globally via the `packageOverrides'
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# configuration option, which must be a function that takes `pkgs'
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# as an argument and returns a set of new or overridden packages.
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# The `packageOverrides' function is called with the *original*
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# (un-overridden) set of packages, allowing packageOverrides
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# attributes to refer to the original attributes (e.g. "foo =
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# ... pkgs.foo ...").
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configOverrides = self: super:
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lib.optionalAttrs allowCustomOverrides
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((config.packageOverrides or (super: {})) super);
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# The complete chain of package set builders, applied from top to bottom.
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# stdenvOverlays must be last as it brings package forward from the
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# previous bootstrapping phases which have already been overlayed.
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toFix = lib.foldl' (lib.flip lib.extends) (self: {}) ([
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stdenvBootstappingAndPlatforms
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platformCompat
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stdenvAdapters
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trivialBuilders
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splice
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allPackages
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aliases
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configOverrides
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] ++ overlays ++ [
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stdenvOverrides ]);
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in
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# Return the complete set of packages.
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lib.fix toFix
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