feat: new module/library for work with call graphs (#2890)

jadx-cli/build.gradle.kts

@@ -11,6 +11,7 @@ dependencies {
 	implementation(project(":jadx-core"))
 	implementation(project(":jadx-plugins-tools"))
 	implementation(project(":jadx-commons:jadx-app-commons"))
+	implementation(project(":jadx-commons:jadx-analysis"))
 
 	runtimeOnly(project(":jadx-plugins:jadx-dex-input"))
 	runtimeOnly(project(":jadx-plugins:jadx-java-input"))

jadx-cli/src/main/java/jadx/cli/JadxCLI.java

@@ -1,11 +1,14 @@
 package jadx.cli;
 
+import java.nio.file.Path;
 import java.util.function.Consumer;
 
 import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import jadx.analysis.callgraph.JadxCallGraph;
+import jadx.analysis.callgraph.api.ICallGraph;
 import jadx.api.JadxArgs;
 import jadx.api.JadxDecompiler;
 import jadx.api.impl.AnnotatedCodeWriter;
@@ -16,6 +19,7 @@ import jadx.cli.LogHelper.LogLevelEnum;
 import jadx.cli.config.JadxConfigAdapter;
 import jadx.cli.plugins.JadxFilesGetter;
 import jadx.core.utils.exceptions.JadxArgsValidateException;
+import jadx.core.utils.exceptions.JadxRuntimeException;
 import jadx.plugins.tools.JadxExternalPluginsLoader;
 
 public class JadxCLI {
@@ -73,6 +77,7 @@ public class JadxCLI {
 			if (checkForErrors(jadx)) {
 				return 2;
 			}
+			writeCallGraph(jadx, cliArgs);
 			if (!SingleClassMode.process(jadx, cliArgs)) {
 				save(jadx);
 			}
@@ -131,4 +136,29 @@ public class JadxCLI {
 			System.out.print("                                                             \r");
 		}
 	}
+
+	private static void writeCallGraph(JadxDecompiler jadx, JadxCLIArgs cliArgs) {
+		JadxCLIArgs.CallGraphSaveMode mode = cliArgs.callGraphSaveMode;
+		if (mode == null || mode == JadxCLIArgs.CallGraphSaveMode.NONE) {
+			return;
+		}
+		Path outPath = jadx.getArgs().getOutDir().toPath();
+		ICallGraph callGraph = JadxCallGraph.builder(jadx)
+				.resolvedOnly(true)
+				.build();
+		Path cgPath;
+		switch (mode) {
+			case JSON:
+				cgPath = outPath.resolve("callgraph.json");
+				callGraph.writeJson(cgPath);
+				break;
+			case DOT:
+				cgPath = outPath.resolve("callgraph.dot");
+				callGraph.writeDot(cgPath);
+				break;
+			default:
+				throw new JadxRuntimeException("Unexpected call graph save mode: " + mode);
+		}
+		LOG.info("Call graph saved: {}", cgPath.toAbsolutePath());
+	}
 }

jadx-cli/src/main/java/jadx/cli/JadxCLIArgs.java

@@ -283,6 +283,13 @@ public class JadxCLIArgs implements IJadxConfig {
 	@Parameter(names = { "--raw-cfg" }, description = "save methods control flow graph (use raw instructions)")
 	protected boolean rawCfgOutput = false;
 
+	@Parameter(
+			names = { "--call-graph" },
+			description = "save app call graph in format: 'dot' or 'json'",
+			converter = CallGraphSaveModeConverter.class
+	)
+	protected CallGraphSaveMode callGraphSaveMode = CallGraphSaveMode.NONE;
+
 	@Parameter(names = { "-f", "--fallback" }, description = "set '--decompilation-mode' to 'fallback' (deprecated)")
 	protected boolean fallbackMode = false;
 
@@ -827,6 +834,14 @@ public class JadxCLIArgs implements IJadxConfig {
 		this.rawCfgOutput = rawCfgOutput;
 	}
 
+	public CallGraphSaveMode getCallGraphSaveMode() {
+		return callGraphSaveMode;
+	}
+
+	public void setCallGraphSaveMode(CallGraphSaveMode callGraphSaveMode) {
+		this.callGraphSaveMode = callGraphSaveMode;
+	}
+
 	public boolean isReplaceConsts() {
 		return replaceConsts;
 	}
@@ -1022,6 +1037,18 @@ public class JadxCLIArgs implements IJadxConfig {
 		}
 	}
 
+	public enum CallGraphSaveMode {
+		NONE,
+		DOT,
+		JSON,
+	}
+
+	public static class CallGraphSaveModeConverter extends BaseEnumConverter<CallGraphSaveMode> {
+		public CallGraphSaveModeConverter() {
+			super(CallGraphSaveMode::valueOf, CallGraphSaveMode::values);
+		}
+	}
+
 	public abstract static class BaseEnumConverter<E extends Enum<E>> implements IStringConverter<E> {
 		private final Function<String, E> parse;
 		private final Supplier<E[]> values;