Function findUsedLualibFeatures

src/LuaLib.ts:292–313

(
    luaTarget: LuaTarget,
    emitHost: EmitHost,
    luaContents: string[]
)

}

export function findUsedLualibFeatures(
    luaTarget: LuaTarget,
    emitHost: EmitHost,
    luaContents: string[]
): Set<LuaLibFeature> {
    const features = new Set<LuaLibFeature>();
    const exportToFeatureMap = getLuaLibExportToFeatureMap(luaTarget, emitHost);

    for (const lua of luaContents) {
        const regex = /^local (\w+) = ____lualib\.(\w+)$/gm;
        while (true) {
            const match = regex.exec(lua);
            if (!match) break;
            const [, localName, exportName] = match;
            if (localName !== exportName) continue;
            const feature = exportToFeatureMap.get(exportName);
            if (feature) features.add(feature);
        }
    }

    return features;
}