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135 lines
4.7 KiB
Nix
135 lines
4.7 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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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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stdenvOverrides
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configOverrides
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] ++ overlays);
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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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