fix(gui): override settings by cmd options

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

+package jadx.cli;
+
+import java.io.PrintStream;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.beust.jcommander.JCommander;
+import com.beust.jcommander.ParameterDescription;
+import com.beust.jcommander.ParameterException;
+import com.beust.jcommander.Parameterized;
+
+import jadx.api.JadxDecompiler;
+
+public class JCommanderWrapper<T> {
+	private final JCommander jc;
+
+	public JCommanderWrapper(T obj) {
+		this.jc = JCommander.newBuilder().addObject(obj).build();
+	}
+
+	public boolean parse(String[] args) {
+		try {
+			jc.parse(args);
+			return true;
+		} catch (ParameterException e) {
+			System.err.println("Arguments parse error: " + e.getMessage());
+			printUsage();
+			return false;
+		}
+	}
+
+	public void overrideProvided(T obj) {
+		List<ParameterDescription> fieldsParams = jc.getParameters();
+		List<ParameterDescription> parameters = new ArrayList<>(1 + fieldsParams.size());
+		parameters.add(jc.getMainParameterValue());
+		parameters.addAll(fieldsParams);
+		for (ParameterDescription parameter : parameters) {
+			if (parameter.isAssigned()) {
+				// copy assigned field value to obj
+				Parameterized parameterized = parameter.getParameterized();
+				Object val = parameterized.get(parameter.getObject());
+				parameterized.set(obj, val);
+			}
+		}
+	}
+
+	public void printUsage() {
+		// print usage in not sorted fields order (by default its sorted by description)
+		PrintStream out = System.out;
+		out.println();
+		out.println("jadx - dex to java decompiler, version: " + JadxDecompiler.getVersion());
+		out.println();
+		out.println("usage: jadx [options] " + jc.getMainParameterDescription());
+		out.println("options:");
+
+		List<ParameterDescription> params = jc.getParameters();
+		Map<String, ParameterDescription> paramsMap = new LinkedHashMap<>(params.size());
+		int maxNamesLen = 0;
+		for (ParameterDescription p : params) {
+			paramsMap.put(p.getParameterized().getName(), p);
+			int len = p.getNames().length();
+			if (len > maxNamesLen) {
+				maxNamesLen = len;
+			}
+		}
+		JadxCLIArgs args = new JadxCLIArgs();
+		Field[] fields = args.getClass().getDeclaredFields();
+		for (Field f : fields) {
+			String name = f.getName();
+			ParameterDescription p = paramsMap.get(name);
+			if (p == null) {
+				continue;
+			}
+			StringBuilder opt = new StringBuilder();
+			opt.append("  ").append(p.getNames());
+			addSpaces(opt, maxNamesLen - opt.length() + 3);
+			opt.append("- ").append(p.getDescription());
+			addDefaultValue(args, f, opt);
+			out.println(opt);
+		}
+		out.println("Example:");
+		out.println("  jadx -d out classes.dex");
+	}
+
+	private void addDefaultValue(JadxCLIArgs args, Field f, StringBuilder opt) {
+		Class<?> fieldType = f.getType();
+		if (fieldType == int.class) {
+			try {
+				int val = f.getInt(args);
+				opt.append(" (default: ").append(val).append(")");
+			} catch (Exception e) {
+				// ignore
+			}
+		}
+	}
+
+	private static void addSpaces(StringBuilder str, int count) {
+		for (int i = 0; i < count; i++) {
+			str.append(' ');
+		}
+	}
+}

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

 package jadx.cli;
 
-import java.io.PrintStream;
-import java.lang.reflect.Field;
 import java.util.ArrayList;
-import java.util.LinkedHashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.stream.Collectors;
 
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.Appender;
-import com.beust.jcommander.JCommander;
 import com.beust.jcommander.Parameter;
-import com.beust.jcommander.ParameterDescription;
-import com.beust.jcommander.ParameterException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -94,27 +87,26 @@ public class JadxCLIArgs {
 	protected boolean printHelp = false;
 
 	public boolean processArgs(String[] args) {
-		return parse(args) && process();
+		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(this);
+		return jcw.parse(args) && process(jcw);
 	}
 
-	private boolean parse(String[] args) {
-		try {
-			makeJCommander().parse(args);
-			return true;
-		} catch (ParameterException e) {
-			System.err.println("Arguments parse error: " + e.getMessage());
-			printUsage();
+	/**
+	 * Set values only for options provided in cmd.
+	 * Used to merge saved options and options passed in command line.
+	 */
+	public boolean overrideProvided(String[] args) {
+		JCommanderWrapper<JadxCLIArgs> jcw = new JCommanderWrapper<>(new JadxCLIArgs());
+		if (!jcw.parse(args)) {
 			return false;
 		}
+		jcw.overrideProvided(this);
+		return process(jcw);
 	}
 
-	private JCommander makeJCommander() {
-		return JCommander.newBuilder().addObject(this).build();
-	}
-
-	private boolean process() {
+	private boolean process(JCommanderWrapper jcw) {
 		if (printHelp) {
-			printUsage();
+			jcw.printUsage();
 			return false;
 		}
 		if (printVersion) {
@@ -136,69 +128,12 @@ public class JadxCLIArgs {
 			}
 		} catch (JadxException e) {
 			System.err.println("ERROR: " + e.getMessage());
-			printUsage();
+			jcw.printUsage();
 			return false;
 		}
 		return true;
 	}
 
-	public void printUsage() {
-		JCommander jc = makeJCommander();
-		// print usage in not sorted fields order (by default its sorted by description)
-		PrintStream out = System.out;
-		out.println();
-		out.println("jadx - dex to java decompiler, version: " + JadxDecompiler.getVersion());
-		out.println();
-		out.println("usage: jadx [options] " + jc.getMainParameterDescription());
-		out.println("options:");
-
-		List<ParameterDescription> params = jc.getParameters();
-		Map<String, ParameterDescription> paramsMap = new LinkedHashMap<>(params.size());
-		int maxNamesLen = 0;
-		for (ParameterDescription p : params) {
-			paramsMap.put(p.getParameterized().getName(), p);
-			int len = p.getNames().length();
-			if (len > maxNamesLen) {
-				maxNamesLen = len;
-			}
-		}
-		JadxCLIArgs args = new JadxCLIArgs();
-		Field[] fields = args.getClass().getDeclaredFields();
-		for (Field f : fields) {
-			String name = f.getName();
-			ParameterDescription p = paramsMap.get(name);
-			if (p == null) {
-				continue;
-			}
-			StringBuilder opt = new StringBuilder();
-			opt.append("  ").append(p.getNames());
-			addSpaces(opt, maxNamesLen - opt.length() + 3);
-			opt.append("- ").append(p.getDescription());
-			addDefaultValue(args, f, opt);
-			out.println(opt);
-		}
-		out.println("Example:");
-		out.println("  jadx -d out classes.dex");
-	}
-
-	private void addDefaultValue(JadxCLIArgs args, Field f, StringBuilder opt) {
-		Class<?> fieldType = f.getType();
-		if (fieldType == int.class) {
-			try {
-				int val = f.getInt(args);
-				opt.append(" (default: ").append(val).append(")");
-			} catch (Exception e) {
-				// ignore
-			}
-		}
-	}
-
-	private static void addSpaces(StringBuilder str, int count) {
-		for (int i = 0; i < count; i++) {
-			str.append(' ');
-		}
-	}
-
 	public JadxArgs toJadxArgs() {
 		JadxArgs args = new JadxArgs();
 		args.setInputFiles(files.stream().map(FileUtils::toFile).collect(Collectors.toList()));

jadx-cli/src/test/java/jadx/cli/JadxCLIArgsTest.java

@@ -30,11 +30,35 @@ public class JadxCLIArgsTest {
 		assertThat(parse("").isSkipSources(), is(false));
 	}
 
+	@Test
+	public void testOptionsOverride() {
+		assertThat(override(new JadxCLIArgs(), "--no-imports").isUseImports(), is(false));
+		assertThat(override(new JadxCLIArgs(), "").isUseImports(), is(true));
+
+		JadxCLIArgs args = new JadxCLIArgs();
+		args.useImports = false;
+		assertThat(override(args, "--no-imports").isUseImports(), is(false));
+
+		args = new JadxCLIArgs();
+		args.useImports = false;
+		assertThat(override(args, "").isUseImports(), is(false));
+	}
+
 	private JadxCLIArgs parse(String... args) {
-		JadxCLIArgs jadxArgs = new JadxCLIArgs();
+		return parse(new JadxCLIArgs(), args);
+	}
+
+	private JadxCLIArgs parse(JadxCLIArgs jadxArgs, String... args) {
 		boolean res = jadxArgs.processArgs(args);
 		assertThat(res, is(true));
 		LOG.info("Jadx args: {}", jadxArgs.toJadxArgs());
 		return jadxArgs;
 	}
+
+	private JadxCLIArgs override(JadxCLIArgs jadxArgs, String... args) {
+		boolean res = jadxArgs.overrideProvided(args);
+		assertThat(res, is(true));
+		LOG.info("Jadx args: {}", jadxArgs.toJadxArgs());
+		return jadxArgs;
+	}
 }

jadx-gui/src/main/java/jadx/gui/JadxGUI.java

@@ -19,7 +19,7 @@ public class JadxGUI {
 			LogCollector.register();
 			final JadxSettings settings = JadxSettingsAdapter.load();
 			// overwrite loaded settings by command line arguments
-			if (!settings.processArgs(args)) {
+			if (!settings.overrideProvided(args)) {
 				return;
 			}
 			if (!tryDefaultLookAndFeel()) {