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author | John Ericson <git@JohnEricson.me> | 2019-03-25 21:56:59 -0400 |
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committer | GitHub <noreply@github.com> | 2019-03-25 21:56:59 -0400 |
commit | aa0cf6442270bae5298e32468dd02e5fa2997fe7 (patch) | |
tree | f0f59389a72c9a15f4db9d508d8f1bb2c5a52250 /pkgs/top-level/stage.nix | |
parent | 08d35056ef20739680a71e2430dea79b59a1a45b (diff) | |
parent | 8ba4db0f11f7d1268b34c725f925c99be240b817 (diff) |
Merge pull request #57611 from Ericson2314/stage-braid-not-chain
top-level: Create `pkgs{Build,Host,Target}{Build,Host,Target}`
Diffstat (limited to 'pkgs/top-level/stage.nix')
-rw-r--r-- | pkgs/top-level/stage.nix | 59 |
1 files changed, 43 insertions, 16 deletions
diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix index 357ca5246c93..9f4b63293ef6 100644 --- a/pkgs/top-level/stage.nix +++ b/pkgs/top-level/stage.nix @@ -21,18 +21,23 @@ ## Other parameters ## -, # The package set used at build-time. If null, `buildPackages` will - # be defined internally as the final produced package set itself. This allows - # us to avoid expensive splicing. - buildPackages - -, # The package set used in the next stage. If null, `targetPackages` will be - # defined internally as the final produced package set itself, just like with - # `buildPackages` and for the same reasons. +, # Either null or an object in the form: # - # THIS IS A HACK for compilers that don't think critically about cross- - # compilation. Please do *not* use unless you really know what you are doing. - targetPackages + # { + # pkgsBuildBuild = ...; + # pkgsBuildHost = ...; + # pkgsBuildTarget = ...; + # pkgsHostHost = ...; + # # pkgsHostTarget skipped on purpose. + # pkgsTargetTarget ...; + # } + # + # These are references to adjacent bootstrapping stages. The more familiar + # `buildPackages` and `targetPackages` are defined in terms of them. If null, + # they are instead defined internally as the current stage. This allows us to + # avoid expensive splicing. `pkgsHostTarget` is skipped because it is always + # defined as the current stage. + adjacentPackages , # The standard environment to use for building packages. stdenv @@ -70,11 +75,33 @@ let inherit (self) runtimeShell; }; - stdenvBootstappingAndPlatforms = self: super: { - buildPackages = (if buildPackages == null then self else buildPackages) - // { recurseForDerivations = false; }; - targetPackages = (if targetPackages == null then self else targetPackages) + stdenvBootstappingAndPlatforms = self: super: let + withFallback = thisPkgs: + (if adjacentPackages == null then self else thisPkgs) // { recurseForDerivations = false; }; + in { + # Here are package sets of from related stages. They are all in the form + # `pkgs{theirHost}{theirTarget}`. For example, `pkgsBuildHost` means their + # host platform is our build platform, and their target platform is our host + # platform. We only care about their host/target platforms, not their build + # platform, because the the former two alone affect the interface of the + # final package; the build platform is just an implementation detail that + # should not leak. + pkgsBuildBuild = withFallback adjacentPackages.pkgsBuildBuild; + pkgsBuildHost = withFallback adjacentPackages.pkgsBuildHost; + pkgsBuildTarget = withFallback adjacentPackages.pkgsBuildTarget; + pkgsHostHost = withFallback adjacentPackages.pkgsHostHost; + pkgsHostTarget = self // { recurseForDerivations = false; }; # always `self` + pkgsTargetTarget = withFallback adjacentPackages.pkgsTargetTarget; + + # Older names for package sets. Use these when only the host platform of the + # package set matter (i.e. use `buildPackages` where any of `pkgsBuild*` + # would do, and `targetPackages` when any of `pkgsTarget*` would do (if we + # had more than just `pkgsTargetTarget`).) + buildPackages = self.pkgsBuildHost; + pkgs = self.pkgsHostTarget; + targetPackages = self.pkgsTargetTarget; + inherit stdenv; }; @@ -87,7 +114,7 @@ let inherit (hostPlatform) system; }; - splice = self: super: import ./splice.nix lib self (buildPackages != null); + splice = self: super: import ./splice.nix lib self (adjacentPackages != null); allPackages = self: super: let res = import ./all-packages.nix |