nova-shell/nix/plugin.nix

116 lines
4.1 KiB
Nix

{
lib,
craneLib,
pkg-config,
qt6,
writeShellScript,
runCommand,
}:
let
# nixpkgs splits Qt: tools (moc/rcc/qtpaths in qtbase, qmltyperegistrar/qmlcachegen
# in qtdeclarative) and headers (qtbase has Qt6Core etc., qtdeclarative has Qt6Qml
# incl. qqmlregistration.h). qt-build-utils derives both from `qmake -query`, which
# only knows about qtbase. Symptom of missing headers: moc warns "Potential QML
# registration macro was found, but no header containing it was included", silently
# strips QML_NAMED_ELEMENT/QML_SINGLETON from the JSON, qmltyperegistrar emits an
# empty qml_register_types_*, and the QML import resolves to no types. Fix: combine
# tools and headers into symlink trees and point a qmake wrapper at them.
qtBuildTools = runCommand "qt6-build-tools" { } ''
mkdir -p $out/libexec $out/bin
for f in ${qt6.qtbase}/libexec/* ${qt6.qtbase}/bin/*; do
ln -sf "$f" "$out/$(echo "$f" | grep -o 'libexec\|bin')/$(basename "$f")"
done
for tool in qmltyperegistrar qmlcachegen; do
src="${qt6.qtdeclarative}/libexec/$tool"
[ -f "$src" ] && ln -sf "$src" "$out/libexec/$tool"
done
'';
# Note: nixpkgs qt6 puts headers in the regular output, not .dev (which only
# has mkspecs). Use qt6.qtbase / qt6.qtdeclarative directly.
qtIncludeRoots = runCommand "qt6-include-roots" { } ''
mkdir -p $out/include
for src in ${qt6.qtbase}/include/* ${qt6.qtdeclarative}/include/*; do
ln -sfn "$src" "$out/include/$(basename "$src")"
done
'';
qmakeWrapper = writeShellScript "qmake6" ''
if [ "$1" = "-query" ]; then
case "$2" in
QT_HOST_LIBEXECS|QT_HOST_LIBEXECS/get|QT_INSTALL_LIBEXECS|QT_INSTALL_LIBEXECS/get)
echo "${qtBuildTools}/libexec"; exit 0;;
QT_HOST_BINS|QT_HOST_BINS/get|QT_INSTALL_BINS|QT_INSTALL_BINS/get)
echo "${qtBuildTools}/bin"; exit 0;;
QT_HOST_INCLUDES|QT_HOST_INCLUDES/get|QT_INSTALL_HEADERS|QT_INSTALL_HEADERS/get)
echo "${qtIncludeRoots}/include"; exit 0;;
esac
fi
exec ${qt6.qtbase}/bin/qmake6 "$@"
'';
# Args shared between the deps-only build (cached on Cargo.lock changes only)
# and the final crate build. cxx-qt-build runs during the deps build too, so it
# needs the Qt env to find qmltyperegistrar/qmlcachegen.
# Default cleanCargoSource only keeps .rs/.toml/.lock; also keep the linker
# --dynamic-list file referenced by build.rs.
pluginSrc = lib.cleanSourceWith {
src = ../plugin;
name = "nova-plugin-source";
filter =
path: type: (baseNameOf path == "qt_plugin_exports.txt") || (craneLib.filterCargoSources path type);
};
commonArgs = {
pname = "nova-plugin";
version = "0.1.0";
src = pluginSrc;
strictDeps = true;
nativeBuildInputs = [
pkg-config
qt6.qtbase
qt6.qtdeclarative
];
buildInputs = [
qt6.qtbase
qt6.qtdeclarative
];
dontWrapQtApps = true;
# qt6.qtbase's setup hook overrides QMAKE after derivation attrs are set,
# so re-assert it in preBuild which runs after all setup hooks.
preBuild = ''
export QMAKE=${qmakeWrapper}
'';
};
cargoArtifacts = craneLib.buildDepsOnly commonArgs;
in
craneLib.buildPackage (
commonArgs
// {
inherit cargoArtifacts;
# Crane's default cargo build doesn't set CARGO_BUILD_TARGET, so artifacts land
# in `target/release/` and cxx-qt files in `target/cxxqt/...` (no triple subdir,
# unlike nixpkgs rustPlatform). Use `find` to stay agnostic to either layout.
installPhaseCommand = ''
qml_dir="$out/lib/qt-6/qml/NovaStats"
mkdir -p "$qml_dir"
so=$(find target -name 'libnova_plugin.so' -path '*/release/*' | head -1)
install -m755 "$so" "$qml_dir/libNovaStats.so"
qmldir=$(find target -path '*/cxxqt/qml_modules/NovaStats/qmldir' | head -1)
install -m644 "$qmldir" "$qml_dir/"
qmltypes=$(find target -path '*/cxxqt/qml_modules/NovaStats/plugin.qmltypes' | head -1)
[ -n "$qmltypes" ] && install -m644 "$qmltypes" "$qml_dir/" || true
'';
meta = {
description = "In-process system stats QML plugin for nova-shell";
platforms = lib.platforms.linux;
};
}
)