Add ignored cameras regex to command-line arguemnts (#849)

This adds a regex that ignores cameras if they match it, for if you have another piece of software running that needs a second camera, or if you have a webcam in your laptop that cscore hates.

photon-server/src/main/java/org/photonvision/Main.java

@@ -75,6 +75,11 @@ public class Main {
                 "Run in test mode with 2019 and 2020 WPI field images in place of cameras");
 
         options.addOption("p", "path", true, "Point test mode to a specific folder");
+        options.addOption(
+                "i",
+                "ignore-cameras",
+                true,
+                "Ignore cameras that match a regex. Uses camera name as provided by cscore.");
 
         CommandLineParser parser = new DefaultParser();
         CommandLine cmd = parser.parse(options, args);
@@ -99,6 +104,11 @@ public class Main {
                     testModeFolder = p;
                 }
             }
+
+            if (cmd.hasOption("ignore-cameras")) {
+                VisionSourceManager.getInstance()
+                        .setIgnoredCamerasRegex(cmd.getOptionValue("ignore-cameras"));
+            }
         }
         return true;
     }