python command to launch script

src/main/java/mobi/omegacentauri/raspberryjammod/PythonExternalCommand.java

@@ -0,0 +1,66 @@
+package mobi.omegacentauri.raspberryjammod;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.command.CommandException;
+import net.minecraft.command.ICommand;
+import net.minecraft.command.ICommandSender;
+import net.minecraft.util.BlockPos;
+
+public class PythonExternalCommand extends ScriptExternalCommand {
+
+	@Override
+	public String getName() {
+		return "python";
+	}
+
+	@Override
+	public List getAliases() {
+		List<String> aliases = new ArrayList<String>();
+		aliases.add(getName());
+		aliases.add("py");
+		return aliases;
+	}
+
+	@Override
+	public String getCommandUsage(ICommandSender sender) {
+		return "python script [arguments]: run script (omit script to stop previous script)";
+	}
+
+	@Override
+	public boolean canCommandSenderUse(ICommandSender sender) {
+		return true;
+	}
+
+	@Override
+	public List addTabCompletionOptions(ICommandSender sender, String[] args,
+			BlockPos pos) {
+		return null;
+	}
+
+	@Override
+	public boolean isUsernameIndex(String[] args, int index) {
+		return false;
+	}
+
+	@Override
+	public int compareTo(Object o) {
+		return 0;
+	}
+
+	@Override
+	protected String getScriptProcessorBase() {
+		return "python";
+	}
+
+	@Override
+	protected String[] getExtensions() {
+		return new String[] { ".py", ".python" };
+	}
+
+	@Override
+	protected String[] getScriptPaths() {
+		return new String[] { "mcpipy/" , "mcpimods/python/"};
+	}
+}

src/main/java/mobi/omegacentauri/raspberryjammod/RaspberryJamMod.java

@@ -19,6 +19,7 @@
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.util.BlockPos;
 import net.minecraft.world.World;
+import net.minecraftforge.common.ForgeHooks;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.ForgeEventFactory;
 import net.minecraftforge.fml.common.FMLCommonHandler;
@@ -34,7 +35,7 @@
 public class RaspberryJamMod
 {
 	public static final String MODID = "raspberryjammod";
-	public static final String VERSION = "0.03";
+	public static final String VERSION = "0.04";
 	public static final String NAME = "Raspberry Jam Mod";
 	private MinecraftCommunicator mcc;
 
@@ -46,7 +47,7 @@ public void onServerStopping(FMLServerStoppingEvent event) {
 	}
 
 	@EventHandler
-	public void onServerStarted(FMLServerStartedEvent event) // FMLInitializationEvent event)
+	public void onServerStarting(FMLServerStartingEvent event) // FMLInitializationEvent event)
 	{
 		// some example code
 		System.out.println("Raspberry Jam Mod started");
@@ -77,6 +78,6 @@ public void run() {
 			System.out.println("Threw "+e1);
 		}
 
+		event.registerServerCommand(new PythonExternalCommand());
 	}
-
 }

src/main/java/mobi/omegacentauri/raspberryjammod/ScriptExternalCommand.java

@@ -0,0 +1,114 @@
+package mobi.omegacentauri.raspberryjammod;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.ProcessBuilder.Redirect;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.command.CommandException;
+import net.minecraft.command.ICommand;
+import net.minecraft.command.ICommandSender;
+import net.minecraft.util.BlockPos;
+
+public abstract class ScriptExternalCommand implements ICommand {
+	abstract protected String getScriptProcessorBase();
+	abstract protected String[] getExtensions();
+	abstract protected String[] getScriptPaths();
+	Process runningScript = null;
+	final String scriptProcessorPath;
+
+	public ScriptExternalCommand() {
+		scriptProcessorPath = getScriptProcessorPath();
+	}
+
+	@Override
+	public List getAliases() {
+		List<String> aliases = new ArrayList<String>();
+		aliases.add(getName());
+		return aliases;
+	}
+
+	protected String getScriptProcessorPath() {
+		String base = getScriptProcessorBase();
+
+		String pathVar = System.getenv("PATH");
+		System.out.println(pathVar);
+		if (pathVar == null)
+			return base;
+
+		String exeExt = System.getProperty("os.name").startsWith("Windows") ? ".exe" : "";
+
+		String[] paths = pathVar.split(System.getProperty("path.separator")); 
+
+		for (String dir : paths) {
+			String p = dir + System.getProperty("file.separator") + base + exeExt;
+			if (new File(p).canExecute())
+				return p;
+		}
+
+		return base;
+	}
+
+
+	@Override
+	public void execute(ICommandSender sender, String[] args)
+			throws CommandException {
+		if (runningScript != null) {
+			runningScript.destroy();
+			runningScript = null;
+			if (args.length == 0) {
+				return;
+			}
+		}
+
+		File script = getScript(args[0]);
+		if (script == null) {
+			throw new CommandException("Cannot find script");
+		}
+
+		List<String> cmd = new ArrayList<String>();
+		cmd.add(scriptProcessorPath);
+		cmd.add(script.getName());
+		for (int i = 1 ; i < args.length ; i++)
+			cmd.add(args[i]);
+
+		ProcessBuilder pb = new ProcessBuilder(cmd);
+		pb.redirectErrorStream(true);
+		pb.directory(script.getParentFile());
+		pb.inheritIO();
+		pb.command(cmd);
+		try {
+			System.out.println("Running "+script);
+			runningScript = pb.start();
+		} catch (IOException e) {
+			throw new CommandException("Error "+e);
+		}
+	}
+
+	protected File getScript(String base) {
+		String[] paths = getScriptPaths();
+		String[] exts = getExtensions();
+
+		for (String ext : exts) {
+			if (ext.startsWith(".") && base.endsWith(ext)) {
+				// already have extension
+				exts = new String[]{""};
+				break;
+			}
+		}
+
+		for (String path : paths) {
+			for (String ext : exts) {
+				try {
+					File f = new File(path + base + ext);
+					if (f.canRead()) 
+						return f;
+				}
+				catch(SecurityException e) {
+				}
+			}
+		}
+		return null;
+	}
+}