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| 1 | +/* |
| 2 | + * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | + * contributor license agreements. See the NOTICE file distributed with |
| 4 | + * this work for additional information regarding copyright ownership. |
| 5 | + * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | + * (the "License"); you may not use this file except in compliance with |
| 7 | + * the License. You may obtain a copy of the License at |
| 8 | + * |
| 9 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | + * |
| 11 | + * Unless required by applicable law or agreed to in writing, software |
| 12 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | + * See the License for the specific language governing permissions and |
| 15 | + * limitations under the License. |
| 16 | + */ |
| 17 | +package org.apache.lucene.gradle; |
| 18 | + |
| 19 | +import java.io.IOException; |
| 20 | +import java.nio.charset.StandardCharsets; |
| 21 | +import java.nio.file.Files; |
| 22 | +import java.nio.file.Path; |
| 23 | +import java.nio.file.Paths; |
| 24 | +import java.nio.file.StandardOpenOption; |
| 25 | +import java.util.Map; |
| 26 | + |
| 27 | +/** |
| 28 | + * Standalone class that generates a populated gradle.properties from a template. |
| 29 | + * |
| 30 | + * <p>Has no dependencies outside of standard java libraries |
| 31 | + */ |
| 32 | +public class GradlePropertiesGenerator { |
| 33 | + public static void main(String[] args) { |
| 34 | + if (args.length != 2) { |
| 35 | + System.err.println("Usage: java GradlePropertiesGenerator.java <source> <destination>"); |
| 36 | + System.exit(2); |
| 37 | + } |
| 38 | + |
| 39 | + try { |
| 40 | + new GradlePropertiesGenerator().run(Paths.get(args[0]), Paths.get(args[1])); |
| 41 | + } catch (Exception e) { |
| 42 | + System.err.println("ERROR: " + e.getMessage()); |
| 43 | + System.exit(3); |
| 44 | + } |
| 45 | + } |
| 46 | + |
| 47 | + public void run(Path source, Path destination) throws IOException { |
| 48 | + if (!Files.exists(source)) { |
| 49 | + throw new IOException("template file not found: " + source); |
| 50 | + } |
| 51 | + if (Files.exists(destination)) { |
| 52 | + System.out.println(destination + " already exists, skipping generation."); |
| 53 | + return; |
| 54 | + } |
| 55 | + |
| 56 | + // Approximate a common-sense default for running gradle/tests with parallel |
| 57 | + // workers: half the count of available cpus but not more than 12. |
| 58 | + var cpus = Runtime.getRuntime().availableProcessors(); |
| 59 | + var maxWorkers = (int) Math.max(1d, Math.min(cpus * 0.5d, 12)); |
| 60 | + var testsJvms = (int) Math.max(1d, Math.min(cpus * 0.5d, 12)); |
| 61 | + |
| 62 | + var replacements = Map.of("@MAX_WORKERS@", maxWorkers, "@TEST_JVMS@", testsJvms); |
| 63 | + |
| 64 | + System.out.println("Generating gradle.properties"); |
| 65 | + String fileContent = Files.readString(source, StandardCharsets.UTF_8); |
| 66 | + for (var entry : replacements.entrySet()) { |
| 67 | + fileContent = fileContent.replace(entry.getKey(), String.valueOf(entry.getValue())); |
| 68 | + } |
| 69 | + Files.writeString( |
| 70 | + destination, fileContent, StandardCharsets.UTF_8, StandardOpenOption.CREATE_NEW); |
| 71 | + } |
| 72 | +} |
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