nixpkgs/lib/systems/inspect.nix

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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 )
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{ lib }:
with import ./parse.nix { inherit lib; };
with lib.attrsets;
with lib.lists;
let abis_ = abis; in
let abis = lib.mapAttrs (_: abi: builtins.removeAttrs abi [ "assertions" ]) abis_; in
rec {
patterns = rec {
isi686 = { cpu = cpuTypes.i686; };
isx86_32 = { cpu = { family = "x86"; bits = 32; }; };
isx86_64 = { cpu = { family = "x86"; bits = 64; }; };
isPowerPC = { cpu = cpuTypes.powerpc; };
isPower = { cpu = { family = "power"; }; };
isx86 = { cpu = { family = "x86"; }; };
isAarch32 = { cpu = { family = "arm"; bits = 32; }; };
isAarch64 = { cpu = { family = "arm"; bits = 64; }; };
isMips = { cpu = { family = "mips"; }; };
isRiscV = { cpu = { family = "riscv"; }; };
isSparc = { cpu = { family = "sparc"; }; };
isWasm = { cpu = { family = "wasm"; }; };
isAvr = { cpu = { family = "avr"; }; };
isAlpha = { cpu = { family = "alpha"; }; };
is32bit = { cpu = { bits = 32; }; };
is64bit = { cpu = { bits = 64; }; };
isBigEndian = { cpu = { significantByte = significantBytes.bigEndian; }; };
isLittleEndian = { cpu = { significantByte = significantBytes.littleEndian; }; };
isBSD = { kernel = { families = { inherit (kernelFamilies) bsd; }; }; };
isDarwin = { kernel = { families = { inherit (kernelFamilies) darwin; }; }; };
isUnix = [ isBSD isDarwin isLinux isSunOS isCygwin ];
isMacOS = { kernel = kernels.macos; };
isiOS = { kernel = kernels.ios; };
isLinux = { kernel = kernels.linux; };
isSunOS = { kernel = kernels.solaris; };
isFreeBSD = { kernel = kernels.freebsd; };
isNetBSD = { kernel = kernels.netbsd; };
isOpenBSD = { kernel = kernels.openbsd; };
isWindows = { kernel = kernels.windows; };
isCygwin = { kernel = kernels.windows; abi = abis.cygnus; };
isMinGW = { kernel = kernels.windows; abi = abis.gnu; };
isAndroid = [ { abi = abis.android; } { abi = abis.androideabi; } ];
isMusl = with abis; map (a: { abi = a; }) [ musl musleabi musleabihf ];
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isUClibc = with abis; map (a: { abi = a; }) [ uclibc uclibceabi uclibceabihf ];
isEfi = map (family: { cpu.family = family; })
[ "x86" "arm" "aarch64" ];
# Deprecated after 18.03
isArm = isAarch32;
};
matchAnyAttrs = patterns:
if builtins.isList patterns then attrs: any (pattern: matchAttrs pattern attrs) patterns
else matchAttrs patterns;
predicates = mapAttrs (_: matchAnyAttrs) patterns;
}