nixpkgs/lib/systems/examples.nix
Graham Christensen 152c63c9ff
Convert libs to a fixed-point
This does break the API of being able to import any lib file and get
its libs, however I'm not sure people did this.

I made this while exploring being able to swap out docFn with a stub
in #2305, to avoid functor performance problems. I don't know if that
is going to move forward (or if it is a problem or not,) but after
doing all this work figured I'd put it up anyway :)

Two notable advantages to this approach:

1. when a lib inherits another lib's functions, it doesn't
   automatically get put in to the scope of lib
2. when a lib implements a new obscure functions, it doesn't
   automatically get put in to the scope of lib

Using the test script (later in this commit) I got the following diff
on the API:

  + diff master fixed-lib
  11764a11765,11766
  > .types.defaultFunctor
  > .types.defaultTypeMerge
  11774a11777,11778
  > .types.isOptionType
  > .types.isType
  11781a11786
  > .types.mkOptionType
  11788a11794
  > .types.setType
  11795a11802
  > .types.types

This means that this commit _adds_ to the API, however I can't find a
way to fix these last remaining discrepancies. At least none are
_removed_.

Test script (run with nix-repl in the PATH):

  #!/bin/sh

  set -eux

  repl() {
      suff=${1:-}
      echo "(import ./lib)$suff" \
          | nix-repl 2>&1
  }

  attrs_to_check() {
      repl "${1:-}" \
          | tr ';'  $'\n' \
          | grep "\.\.\." \
          | cut -d' ' -f2 \
          | sed -e "s/^/${1:-}./" \
          | sort
  }

  summ() {
      repl "${1:-}" \
          | tr ' ' $'\n' \
          | sort \
          | uniq
  }

  deep_summ() {
      suff="${1:-}"
      depth="${2:-4}"
      depth=$((depth - 1))
      summ "$suff"

      for attr in $(attrs_to_check "$suff" | grep -v "types.types"); do
          if [ $depth -eq 0 ]; then
              summ "$attr" | sed -e "s/^/$attr./"
          else
              deep_summ "$attr" "$depth" | sed -e "s/^/$attr./"
          fi
      done
  }

  (
      cd nixpkgs

      #git add .
      #git commit -m "Auto-commit, sorry" || true
      git checkout fixed-lib
      deep_summ > ../fixed-lib
      git checkout master
      deep_summ > ../master
  )

  if diff master fixed-lib; then
      echo "SHALLOW MATCH!"
  fi

  (
      cd nixpkgs
      git checkout fixed-lib
      repl .types
  )
2017-09-16 21:36:43 -04:00

131 lines
2.8 KiB
Nix

# These can be passed to nixpkgs as either the `localSystem` or
# `crossSystem`. They are put here for user convenience, but also used by cross
# tests and linux cross stdenv building, so handle with care!
{ lib }:
let platforms = import ./platforms.nix { inherit lib; }; in
rec {
#
# Linux
#
sheevaplug = rec {
config = "armv5tel-unknown-linux-gnueabi";
bigEndian = false;
arch = "armv5tel";
float = "soft";
withTLS = true;
libc = "glibc";
platform = platforms.sheevaplug;
openssl.system = "linux-generic32";
inherit (platform) gcc;
};
raspberryPi = rec {
config = "armv6l-unknown-linux-gnueabihf";
bigEndian = false;
arch = "armv6l";
float = "hard";
fpu = "vfp";
withTLS = true;
libc = "glibc";
platform = platforms.raspberrypi;
openssl.system = "linux-generic32";
inherit (platform) gcc;
};
armv7l-hf-multiplatform = rec {
config = "arm-unknown-linux-gnueabihf";
bigEndian = false;
arch = "armv7-a";
float = "hard";
fpu = "vfpv3-d16";
withTLS = true;
libc = "glibc";
platform = platforms.armv7l-hf-multiplatform;
openssl.system = "linux-generic32";
inherit (platform) gcc;
};
aarch64-multiplatform = rec {
config = "aarch64-unknown-linux-gnu";
bigEndian = false;
arch = "aarch64";
withTLS = true;
libc = "glibc";
platform = platforms.aarch64-multiplatform;
inherit (platform) gcc;
};
scaleway-c1 = armv7l-hf-multiplatform // rec {
platform = platforms.scaleway-c1;
inherit (platform) gcc;
inherit (gcc) fpu;
};
pogoplug4 = rec {
arch = "armv5tel";
config = "armv5tel-softfloat-linux-gnueabi";
float = "soft";
platform = platforms.pogoplug4;
inherit (platform) gcc;
libc = "glibc";
withTLS = true;
openssl.system = "linux-generic32";
};
fuloongminipc = rec {
config = "mips64el-unknown-linux-gnu";
bigEndian = false;
arch = "mips";
float = "hard";
withTLS = true;
libc = "glibc";
platform = platforms.fuloong2f_n32;
openssl.system = "linux-generic32";
inherit (platform) gcc;
};
#
# Darwin
#
iphone64 = {
config = "aarch64-apple-darwin14";
arch = "arm64";
libc = "libSystem";
platform = {};
};
iphone32 = {
config = "arm-apple-darwin10";
arch = "armv7-a";
libc = "libSystem";
platform = {};
};
#
# Windows
#
# 32 bit mingw-w64
mingw32 = {
config = "i686-pc-mingw32";
arch = "x86"; # Irrelevant
libc = "msvcrt"; # This distinguishes the mingw (non posix) toolchain
platform = {};
};
# 64 bit mingw-w64
mingwW64 = {
# That's the triplet they use in the mingw-w64 docs.
config = "x86_64-pc-mingw32";
arch = "x86_64"; # Irrelevant
libc = "msvcrt"; # This distinguishes the mingw (non posix) toolchain
platform = {};
};
}