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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

43 lines
1.6 KiB
Nix

{ lib }:
with import ./parse.nix { inherit lib; };
with lib.attrsets;
with lib.lists;
rec {
patterns = rec {
"32bit" = { cpu = { bits = 32; }; };
"64bit" = { cpu = { bits = 64; }; };
i686 = { cpu = cpuTypes.i686; };
x86_64 = { cpu = cpuTypes.x86_64; };
PowerPC = { cpu = cpuTypes.powerpc; };
x86 = { cpu = { family = "x86"; }; };
Arm = { cpu = { family = "arm"; }; };
Aarch64 = { cpu = { family = "aarch64"; }; };
Mips = { cpu = { family = "mips"; }; };
BigEndian = { cpu = { significantByte = significantBytes.bigEndian; }; };
LittleEndian = { cpu = { significantByte = significantBytes.littleEndian; }; };
BSD = { kernel = { families = { inherit (kernelFamilies) bsd; }; }; };
Unix = [ BSD Darwin Linux SunOS Hurd Cygwin ];
Darwin = { kernel = kernels.darwin; };
Linux = { kernel = kernels.linux; };
SunOS = { kernel = kernels.solaris; };
FreeBSD = { kernel = kernels.freebsd; };
Hurd = { kernel = kernels.hurd; };
NetBSD = { kernel = kernels.netbsd; };
OpenBSD = { kernel = kernels.openbsd; };
Windows = { kernel = kernels.windows; };
Cygwin = { kernel = kernels.windows; abi = abis.cygnus; };
MinGW = { kernel = kernels.windows; abi = abis.gnu; };
};
matchAnyAttrs = patterns:
if builtins.isList patterns then attrs: any (pattern: matchAttrs pattern attrs) patterns
else matchAttrs patterns;
predicates = mapAttrs'
(name: value: nameValuePair ("is" + name) (matchAnyAttrs value))
patterns;
}