61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
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const { withDangerousMod } = require('@expo/config-plugins');
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const fs = require('fs');
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const path = require('path');
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const MAX_JOBS = '8';
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// React Native's hermes-engine build hardcodes
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// Runtime.getRuntime().availableProcessors()
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// for cmake --build -j, ignoring all env vars.
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// On high-core CI runners this exhausts memory.
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// This plugin patches hermes-engine/build.gradle.kts
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// during prebuild to cap parallel jobs.
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const withCmakeJobLimit = (config) =>
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withDangerousMod(config, [
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'android',
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async (config) => {
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const root = config.modRequest.projectRoot;
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// 1. Patch hermes-engine: availableProcessors() -> "8"
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const hermesPath = path.join(
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root,
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'node_modules',
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'react-native',
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'ReactAndroid',
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'hermes-engine',
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'build.gradle.kts',
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);
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if (fs.existsSync(hermesPath)) {
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let content = fs.readFileSync(hermesPath, 'utf-8');
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content = content.replace(
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/Runtime\.getRuntime\(\)\.availableProcessors\(\)\.toString\(\)/,
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`"${MAX_JOBS}"`,
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);
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fs.writeFileSync(hermesPath, content);
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}
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// 2. Patch app/build.gradle: add cmake -j argument to externalNativeBuild
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const appGradlePath = path.join(
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config.modRequest.platformProjectRoot,
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'app',
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'build.gradle',
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);
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if (fs.existsSync(appGradlePath)) {
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let content = fs.readFileSync(appGradlePath, 'utf-8');
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// Insert externalNativeBuild cmake arguments block inside the android { } block
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// We add it right after "ndkVersion rootProject.ext.ndkVersion"
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if (!content.includes('CMAKE_BUILD_PARALLEL_LEVEL')) {
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content = content.replace(
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/(\s*ndkVersion rootProject\.ext\.ndkVersion)/,
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`$1\n externalNativeBuild {\n cmake {\n arguments "-j${MAX_JOBS}"\n }\n }`,
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);
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}
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fs.writeFileSync(appGradlePath, content);
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}
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return config;
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},
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]);
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module.exports = withCmakeJobLimit;
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