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Extract the top-level logic out of all-packages.nix into pkgs/top-lev…
…el/default.nix
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| /* 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. */ | ||
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| { # The system (e.g., `i686-linux') for which to build the packages. | ||
| system ? builtins.currentSystem | ||
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| , # The standard environment to use. Only used for bootstrapping. If | ||
| # null, the default standard environment is used. | ||
| bootStdenv ? null | ||
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| , # 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") | ||
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| # More flags for the bootstrapping of stdenv. | ||
| , gccWithCC ? true | ||
| , gccWithProfiling ? true | ||
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| , # Allow a configuration attribute set to be passed in as an | ||
| # argument. Otherwise, it's read from $NIXPKGS_CONFIG or | ||
| # ~/.nixpkgs/config.nix. | ||
| config ? null | ||
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| , crossSystem ? null | ||
| , platform ? null | ||
| }: | ||
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| let config_ = config; platform_ = platform; in # rename the function arguments | ||
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| let | ||
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| lib = import ../../lib; | ||
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| # The contents of the configuration file found at $NIXPKGS_CONFIG or | ||
| # $HOME/.nixpkgs/config.nix. | ||
| # for NIXOS (nixos-rebuild): use nixpkgs.config option | ||
| config = | ||
| let | ||
| toPath = builtins.toPath; | ||
| getEnv = x: if builtins ? getEnv then builtins.getEnv x else ""; | ||
| pathExists = name: | ||
| builtins ? pathExists && builtins.pathExists (toPath name); | ||
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| configFile = getEnv "NIXPKGS_CONFIG"; | ||
| homeDir = getEnv "HOME"; | ||
| configFile2 = homeDir + "/.nixpkgs/config.nix"; | ||
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| configExpr = | ||
| if config_ != null then config_ | ||
| else if configFile != "" && pathExists configFile then import (toPath configFile) | ||
| else if homeDir != "" && pathExists configFile2 then import (toPath configFile2) | ||
| else {}; | ||
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| in | ||
| # allow both: | ||
| # { /* the config */ } and | ||
| # { pkgs, ... } : { /* the config */ } | ||
| if builtins.isFunction configExpr | ||
| then configExpr { inherit pkgs; } | ||
| else configExpr; | ||
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| # Allow setting the platform in the config file. Otherwise, let's use a reasonable default (pc) | ||
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| platformAuto = let | ||
| platforms = (import ./platforms.nix); | ||
| in | ||
| if system == "armv6l-linux" then platforms.raspberrypi | ||
| else if system == "armv7l-linux" then platforms.armv7l-hf-multiplatform | ||
| else if system == "armv5tel-linux" then platforms.sheevaplug | ||
| else if system == "mips64el-linux" then platforms.fuloong2f_n32 | ||
| else if system == "x86_64-linux" then platforms.pc64 | ||
| else if system == "i686-linux" then platforms.pc32 | ||
| else platforms.pcBase; | ||
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| platform = if platform_ != null then platform_ | ||
| else config.platform or platformAuto; | ||
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| topLevelArguments = { | ||
| inherit system bootStdenv noSysDirs gccWithCC gccWithProfiling config | ||
| crossSystem platform lib; | ||
| }; | ||
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| # Allow packages to be overriden globally via the `packageOverrides' | ||
| # configuration option, which must be a function that takes `pkgs' | ||
| # as an argument and returns a set of new or overriden packages. | ||
| # The `packageOverrides' function is called with the *original* | ||
| # (un-overriden) set of packages, allowing packageOverrides | ||
| # attributes to refer to the original attributes (e.g. "foo = | ||
| # ... pkgs.foo ..."). | ||
| pkgs = pkgsWithOverrides (self: config.packageOverrides or (super: {})); | ||
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| # stdenvOverrides is used to avoid circular dependencies for building the | ||
| # standard build environment. This mechanism use 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 overrided packages will not be built with the | ||
| # crossStdenv adapter. | ||
| stdenvOverrides = pkgs: | ||
| lib.optionalAttrs (crossSystem == null && pkgs.stdenv ? overrides) | ||
| (pkgs.stdenv.overrides pkgs); | ||
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| # Return the complete set of packages, after applying the overrides | ||
| # returned by the `overrider' function (see above). Warning: this | ||
| # function is very expensive! | ||
| pkgsWithOverrides = overrider: | ||
| let | ||
| # The un-overriden packages, passed to `overrider'. | ||
| pkgs_6 = pkgsFun pkgs; | ||
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| pkgs_7 = pkgs_6 // overrider pkgs pkgs_6; | ||
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| # The overriden, final packages. | ||
| pkgs = pkgs_7 // stdenvOverrides pkgs_6; | ||
| in pkgs; | ||
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| # The package compositions. Yes, this isn't properly indented. | ||
| pkgsFun = pkgs: | ||
| let | ||
| # Helper functions that are exported through `pkgs'. | ||
| helperFunctions = | ||
| stdenvAdapters // | ||
| (import ../build-support/trivial-builders.nix { inherit lib; inherit (pkgs) stdenv; inherit (pkgs.xorg) lndir; }); | ||
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| stdenvAdapters = | ||
| import ../stdenv/adapters.nix pkgs; | ||
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| stdenvDefault = (import ./stdenv.nix topLevelArguments) {} pkgs; | ||
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| selfArgs = topLevelArguments // { inherit pkgsWithOverrides stdenvAdapters helperFunctions; }; | ||
| self = (import ./all-packages.nix selfArgs) self pkgs; | ||
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| aliases = import ./aliases.nix self; | ||
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| in | ||
| helperFunctions // stdenvDefault // self // aliases; | ||
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| in | ||
| pkgs |