Options can now be set on the command line

src/org/getmonero/i2p/embedded/Main.java

@@ -2,6 +2,7 @@ package org.getmonero.i2p.embedded;
 
 import java.io.File;
 import java.util.Properties;
+import java.util.stream.Collectors;
 
 import net.i2p.I2PAppContext;
 import net.i2p.app.ClientAppManager;
@@ -13,7 +14,8 @@ public class Main {
 
   public static void main(String[] args) {
 
-    System.out.println("I2P router launched. SAM listening on port 7656. Press Ctrl-C to terminate.");
+    System.out.println("I2P router launched. SAM listening on port 7656.\n" +
+        "Press Ctrl-C to gracefully shut down the router (or send the SIGINT signal to the process).");
 
     Properties p = new Properties();
     // add your configuration settings, directories, etc.
@@ -21,18 +23,29 @@ public class Main {
     p.put("i2p.dir.base", "/usr/share/i2p");
     // where to find the I2P data files
     p.put("i2p.dir.config", System.getProperty("user.home") + File.separator + ".i2p");
-
     // bandwidth limits in K bytes per second
     p.put("i2np.inboundKBytesPerSecond","50");
     p.put("i2np.outboundKBytesPerSecond","50");
     p.put("router.sharePercentage","80");
 
+    // allow default properties to be overridden via command line args, e.g. --i2p.dir.base=/usr/share/i2p
+    for(String arg : args) {
+      if(arg.startsWith("--")) {
+        String[] s = arg.split("=");
+        String argName = s[0].substring("--".length());
+        String argVal = s[1];
+        p.put(argName, argVal);
+      }
+    }
+
+    System.out.println("Options set: "
+        + p.entrySet().stream().map(e->"--"+e.getKey()+"="+e.getValue()).collect(Collectors.joining( " " )));
+
     Router r = new Router(p);
 
     new Thread() {
       @Override
       public void run() {
-        // don't call exit() when the router stops
         r.setKillVMOnEnd(true);
         r.runRouter();
       }