Add a new launcher cli option to select the version to launch

launcher/src/se/llbit/chunky/launcher/ChunkyLauncher.java

@@ -32,6 +32,7 @@
 import java.net.*;
 import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
+import java.util.List;
 import java.util.Scanner;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.atomic.AtomicReference;
@@ -89,15 +90,30 @@ public static Options cliOptionsPublic() {
 
     options.addOption(Option.builder()
       .longOpt("update")
+      .desc("Update Chunky to the latest release")
+      .build()
+    );
+
+    options.addOption(Option.builder()
+      .longOpt("releaseChannel")
       .argName("release channel")
       .optionalArg(true)
-      .desc("Update Chunky to the latest release")
+      .desc("Specify the release channel (for use with --update and --chunkyVersion latest)")
+      .build()
+    );
+
+    options.addOption(Option.builder()
+      .longOpt("updateSite")
+      .argName("update site")
+      .desc("Update site to use for updating")
       .build()
     );
 
     options.addOption(Option.builder()
-      .longOpt("setup")
-      .desc("Runs the interactive command-line launcher setup")
+      .longOpt("chunkyVersion")
+      .argName("chunky version")
+      .numberOfArgs(1)
+      .desc("Chunky version to launch (latest for the latest installed version of the specified release channel)")
       .build()
     );
 
@@ -168,15 +184,18 @@ public static void main(String[] args) throws FileNotFoundException {
         CommandLine cmd = parseCli(args);
 
         if (cmd.hasOption("help")) {
-          String header = CliUtil.makeHelpHeader("Chunky Launcher", LAUNCHER_VERSION.toString(), "");
+          String header = CliUtil.makeHelpHeader("Chunky Launcher", LAUNCHER_VERSION.toString(), "Commands:\n" +
+            "    setup    Runs the interactive command-line launcher setup\n" +
+            "    update   Download the latest version\n" +
+            "    (none)   Launch the latest version\n\nOptions:");
           String footer = "\n" +
             "Command line options after -- are passed to Chunky.\n" +
             "For Chunky's command line help, run:\n" +
             "  java -jar ChunkyLauncher.jar -- --help";
 
           HelpFormatter help = new HelpFormatter();
           help.setWidth(CliUtil.CLI_WIDTH);
-          help.printHelp("java -jar ChunkyLauncher.jar", header, cliOptionsPublic(), footer);
+          help.printHelp("java -jar ChunkyLauncher.jar [command] <options>", header, cliOptionsPublic(), footer);
           return;
         }
 
@@ -197,19 +216,27 @@ public static void main(String[] args) throws FileNotFoundException {
           settings.forceGuiConsole = true;
         }
 
-        if (cmd.hasOption("update")) {
-          ReleaseChannel channel = settings.selectedChannel;
+        if (cmd.hasOption("updateSite")) {
+          settings.updateSite = cmd.getOptionValue("updateSite");
+          reloadReleaseChannels(settings);
+          return;
+        }
 
-          String selected = cmd.getOptionValue("update");
+        if (cmd.hasOption("releaseChannel")) {
+          String selected = cmd.getOptionValue("releaseChannel");
           if (selected != null) {
-            channel = settings.releaseChannels.getOrDefault(selected, channel);
+            settings.selectedChannel = settings.releaseChannels.getOrDefault(selected, settings.selectedChannel);
           }
+        }
 
-          headlessUpdateChunky(settings, channel);
-          return;
+        if (cmd.hasOption("update") || args[0].equals("update")) {
+          headlessUpdateChunky(settings, settings.selectedChannel);
+          if (args[0].equals("update")) {
+            return;
+          }
         }
 
-        if (cmd.hasOption("setup")) {
+        if (args[0].equals("setup")) {
           doSetup(settings);
           settings.save();
           return;
@@ -245,6 +272,14 @@ public static void main(String[] args) throws FileNotFoundException {
           LauncherSettings.disableLibraryValidation = true;
         }
 
+        if (cmd.hasOption("chunkyVersion")) {
+          settings.version = cmd.getOptionValue("chunkyVersion");
+          if ("latest".equals(cmd.getOptionValue("chunkyVersion"))) {
+            List<VersionInfo> versions = new UpdateChecker(settings, settings.selectedChannel).getVersions();
+            settings.version = versions.stream().findAny().map(version -> version.name).orElse(settings.version);
+          }
+        }
+
         headlessOptions = String.join(" ", cmd.getArgList());
 
         if (forceLauncher) {
@@ -330,7 +365,7 @@ public static void main(String[] args) throws FileNotFoundException {
       }
       e.printStackTrace(System.err);
     } catch (ParseException e) {
-        System.out.println(e.getMessage());
+      System.out.println(e.getMessage());
     }
   }
 

launcher/src/se/llbit/chunky/launcher/UpdateChecker.java

@@ -17,18 +17,19 @@
  */
 package se.llbit.chunky.launcher;
 
+import se.llbit.json.JsonParser;
+import se.llbit.json.JsonParser.SyntaxError;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 
-import se.llbit.json.JsonParser;
-import se.llbit.json.JsonParser.SyntaxError;
-
 /**
  * Check for update and run update dialog (or just update in headless mode).
  *
@@ -37,12 +38,31 @@
 public class UpdateChecker extends Thread {
   private final LauncherSettings settings;
   private final UpdateListener listener;
-  private final String path;
+  private final ReleaseChannel channel;
 
   public UpdateChecker(LauncherSettings settings, ReleaseChannel channel, UpdateListener listener) {
     this.settings = settings;
     this.listener = listener;
-    this.path = channel.path;
+    this.channel = channel;
+  }
+
+  public UpdateChecker(LauncherSettings settings, ReleaseChannel channel) {
+    this(settings, channel, new UpdateListener() {
+      @Override
+      public void updateError(String message) {
+        // ignore
+      }
+
+      @Override
+      public void updateAvailable(VersionInfo latest) {
+        // ignore
+      }
+
+      @Override
+      public void noUpdateAvailable() {
+        // ignore
+      }
+    });
   }
 
   @Override
@@ -58,9 +78,7 @@ public void run() {
   }
 
   private boolean tryUpdate() {
-    List<VersionInfo> candidates = new LinkedList<>();
-
-    getVersion(candidates, settings.getResourceUrl(path));
+    List<VersionInfo> candidates = getVersions();
 
     // Filter out corrupt versions.
     Iterator<VersionInfo> iter = candidates.iterator();
@@ -98,6 +116,12 @@ private boolean tryUpdate() {
     return true;
   }
 
+  public List<VersionInfo> getVersions() {
+    List<VersionInfo> candidates = new LinkedList<>();
+    getVersion(candidates, settings.getResourceUrl(channel.path));
+    return Collections.unmodifiableList(candidates);
+  }
+
   private void getVersion(List<VersionInfo> candidates, String url) {
     try {
       URL latestJson = new URL(url);

lib/src/se/llbit/chunky/HelpCopyright.java

@@ -22,7 +22,7 @@
  * This contains the proper copyright information for various messages
  */
 public class HelpCopyright {
-  public static final String COPYRIGHT_LINE = "Copyright (c) 2010-2024 Jesper Öqvist and Chunky Contributors";
+  public static final String COPYRIGHT_LINE = "Copyright (c) 2010-2026 Jesper Öqvist and Chunky Contributors";
 
   public static final String COPYRIGHT_DISCLAIMER =
     "Chunky comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it " +