nixpkgs/pkgs/test/cross/default.nix
Matthew Bauer 9c8fd41224 treewide: add emulator to platform
You can use stdenv.hostPlatform.emulator to get an executable that
runs cross-built binaries. This could be any emulator. For instance,
we use QEMU to emulate Linux targets and Wine to emulate Windows
targets. To work with qemu, we need to support custom targets.

I’ve reworked the cross tests in pkgs/test/cross to use this
functionality.

Also, I’ve used talloc to cross-execute with the emulator. There
appears to be a cross-execute for all waf builds. In the future, it
would be nice to set this for all waf builds.

Adds stdenv.hostPlatform.qemuArch attrbute to get the qemuArch for
each platform.
2018-11-29 19:15:30 -06:00

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{ pkgs, lib }:
let
testedSystems = lib.filterAttrs (name: value: let
platform = lib.systems.elaborate value;
in platform.isLinux || platform.isWindows
) lib.systems.examples;
getExecutable = pkgs: pkgFun: exec:
"${pkgFun pkgs}${exec}${pkgs.hostPlatform.extensions.executable}";
compareTest = { emulator, pkgFun, hostPkgs, crossPkgs, exec, args ? [] }: let
pkgName = (pkgFun hostPkgs).name;
args' = lib.concatStringsSep " " args;
in pkgs.runCommand "test-${pkgName}-${crossPkgs.hostPlatform.config}" {
nativeBuildInputs = [ pkgs.dos2unix ];
} ''
# Just in case we are using wine, get rid of that annoying extra
# stuff.
export WINEDEBUG=-all
HOME=$(pwd)
mkdir -p $out
# We need to remove whitespace, unfortunately
# Windows programs use \r but Unix programs use \n
# find expected value natively
${getExecutable hostPkgs pkgFun exec} ${args'} \
| dos2unix > $out/expected
# run emulator to get actual value
${emulator} ${getExecutable crossPkgs pkgFun exec} ${args'} \
| dos2unix > $out/actual
if [ "$(cat $out/actual)" != "$(cat $out/expected)" ]; then
echo "${pkgName} did not output expected value:"
cat $out/expected
echo "instead it output:"
cat $out/actual
exit 1
else
echo "${pkgName} test passed"
echo "both produced output:"
cat $out/actual
fi
'';
mapMultiPlatformTest = test: lib.mapAttrs (name: system: test rec {
crossPkgs = import pkgs.path {
localSystem = { inherit (pkgs.hostPlatform) config; };
crossSystem = system;
};
emulator = crossPkgs.hostPlatform.emulator pkgs;
# Apply some transformation on windows to get dlls in the right
# place. Unfortunately mingw doesnt seem to be able to do linking
# properly.
platformFun = pkg: if crossPkgs.hostPlatform.isWindows then
pkgs.buildEnv {
name = "${pkg.name}-winlinks";
paths = [pkg] ++ pkg.buildInputs;
} else pkg;
}) testedSystems;
in
lib.mapAttrs (_: mapMultiPlatformTest) {
file = {platformFun, crossPkgs, emulator}: compareTest {
inherit emulator crossPkgs;
hostPkgs = pkgs;
exec = "/bin/file";
args = [
"${pkgs.file}/share/man/man1/file.1.gz"
"${pkgs.dejavu_fonts}/share/fonts/truetype/DejaVuMathTeXGyre.ttf"
];
pkgFun = pkgs: platformFun pkgs.file;
};
hello = {platformFun, crossPkgs, emulator}: compareTest {
inherit emulator crossPkgs;
hostPkgs = pkgs;
exec = "/bin/hello";
pkgFun = pkgs: pkgs.hello;
};
}