Add script to only enable a subset of projects to aid development (#4126)

.gitignore

@@ -35,6 +35,7 @@ classes/
 run
 *.log
 *.log.gz
+focus.txt
 
 # Windows
 *.db

gradle/Focus.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.Files;
+import java.util.HashSet;
+import java.io.IOException;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * A script to only enable subprojects that you are working on.
+ *
+ * Usage:
+ * - Run "java gradle/Focus.java fabric-networking-api-v1" to focus on fabric-networking-api-v1
+ * - Run "java gradle/Focus.java fabric-networking-api-v1 fabric-sound-api-v1" to focus on fabric-networking-api-v1 and fabric-sound-api-v1
+ * - Run "java gradle/Focus.java" to reset focus
+ *
+ * After running the script, refresh the Gradle project in your IDE.
+ */
+public class Focus {
+	// Matches the content of moduleDependencies and testDependencies
+	private static final Pattern OUTER_PATTERN = Pattern.compile("(?:moduleDependencies|testDependencies)\\s*\\(.*?\\[\\s*([\\s\\S]*?)\\s*\\]\\s*\\)\n");
+	// Matches the dependency string
+	private static final Pattern INNER_PATTERN = Pattern.compile("['\\\"]([^'\\\"]+)['\\\"]");
+
+	public static void main(String[] args) throws IOException {
+		Path path = Paths.get("focus.txt");
+
+		if (args.length == 0) {
+			Files.deleteIfExists(path);
+			System.out.println("Reset focus");
+			return;
+		}
+
+		Set<String> dependencies = new HashSet<>();
+
+		for (String arg : args) {
+			readDependencies(arg, dependencies);
+		}
+
+		// All modules depend on fabric-gametest-api-v1 and fabric-registry-sync-v0
+		readDependencies("fabric-gametest-api-v1", dependencies);
+		readDependencies("fabric-registry-sync-v0", dependencies);
+
+		System.out.println("Focusing on:\n" + String.join("\n", dependencies));
+
+		Files.writeString(path, String.join("\n", dependencies));
+	}
+
+	private static void readDependencies(String project, Set<String> dependencies) throws IOException {
+		if (dependencies.contains(project)) {
+			return;
+		}
+
+		dependencies.add(project);
+
+		Path buildGradlePath = Paths.get(project, "build.gradle");
+
+		if (Files.notExists(buildGradlePath)) {
+			throw new RuntimeException("Project not found: " + project);
+		}
+
+		String content = Files.readString(buildGradlePath);
+		Matcher outerMatcher = OUTER_PATTERN.matcher(content);
+
+		while (outerMatcher.find()) {
+			String outerMatch = outerMatcher.group(1);
+			Matcher innerMatcher = INNER_PATTERN.matcher(outerMatch);
+			while (innerMatcher.find()) {
+				String dependency = innerMatcher.group(1).replace(":", "");
+				readDependencies(dependency, dependencies);
+			}
+		}
+	}
+}

settings.gradle

@@ -13,6 +13,16 @@ rootProject.name = "fabric-api"
 include 'fabric-api-bom'
 include 'fabric-api-catalog'
 
+def focus = new File('focus.txt')
+
+if (focus.exists()) {
+	focus.eachLine {
+		include it
+	}
+
+	return // Skip the rest of the includes
+}
+
 include 'fabric-api-base'
 
 include 'fabric-api-lookup-api-v1'