Add interactive mode to CLI. Improve CLI

teavm-cli/src/main/java/org/teavm/cli/TeaVMRunner.java

@@ -15,16 +15,24 @@
  */
 package org.teavm.cli;
 
-import java.io.File;
+import java.io.*;
 import org.apache.commons.cli.*;
 import org.teavm.tooling.RuntimeCopyOperation;
 import org.teavm.tooling.TeaVMTool;
+import org.teavm.tooling.TeaVMToolException;
+import org.teavm.vm.TeaVMPhase;
+import org.teavm.vm.TeaVMProgressFeedback;
+import org.teavm.vm.TeaVMProgressListener;
 
 /**
  *
  * @author Alexey Andreev
  */
 public final class TeaVMRunner {
+    private static long startTime;
+    private static long phaseStartTime;
+    private static TeaVMPhase currentPhase;
+
     private TeaVMRunner() {
     }
 
@@ -78,6 +86,10 @@ public final class TeaVMRunner {
                 .withDescription("Incremental build cache directory")
                 .withLongOpt("cachedir")
                 .create('c'));
+        options.addOption(OptionBuilder
+                .withDescription("Wait for command after compilation, in order to enable hot recompilation")
+                .withLongOpt("--wait")
+                .create('w'));
 
         if (args.length == 0) {
             printUsage(options);
@@ -139,6 +151,7 @@ public final class TeaVMRunner {
         } else {
             tool.setCacheDirectory(new File(tool.getTargetDirectory(), "teavm-cache"));
         }
+        boolean interactive = commandLine.hasOption('w');
         args = commandLine.getArgs();
         if (args.length > 1) {
             System.err.println("Unexpected arguments");
@@ -149,9 +162,42 @@ public final class TeaVMRunner {
         }
         tool.setLog(new ConsoleTeaVMToolLog());
         tool.getProperties().putAll(System.getProperties());
+        tool.setProgressListener(progressListener);
 
+        if (interactive) {
+            boolean quit = false;
+            BufferedReader reader;
             try {
-            tool.generate();
+                reader = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
+            } catch (UnsupportedEncodingException e) {
+                e.printStackTrace();
+                System.exit(-2);
+                return;
+            }
+            do {
+                try {
+                    build(tool);
+                } catch (Exception e) {
+                    e.printStackTrace(System.err);
+                }
+                System.out.println("Press enter to repeat or enter 'q' to quit");
+                try {
+                    String line = reader.readLine().trim();
+                    if (!line.isEmpty()) {
+                        if (line.equals("q")) {
+                            quit = true;
+                        } else {
+                            System.out.println("Unrecognized command");
+                        }
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    System.exit(-2);
+                }
+            } while (!quit);
+        } else {
+            try {
+                build(tool);
             } catch (Exception e) {
                 e.printStackTrace(System.err);
                 System.exit(-2);
@@ -160,6 +206,55 @@ public final class TeaVMRunner {
                 System.exit(-2);
             }
         }
+    }
+
+    private static void build(TeaVMTool tool) throws TeaVMToolException {
+        currentPhase = null;
+        startTime = System.currentTimeMillis();
+        phaseStartTime = System.currentTimeMillis();
+        tool.generate();
+        reportPhaseComplete();
+        System.out.println("Build complete for " + ((System.currentTimeMillis() - startTime) / 1000.0) + " seconds");
+    }
+
+    private static TeaVMProgressListener progressListener = new TeaVMProgressListener() {
+        @Override
+        public TeaVMProgressFeedback progressReached(int progress) {
+            return TeaVMProgressFeedback.CONTINUE;
+        }
+        @Override
+        public TeaVMProgressFeedback phaseStarted(TeaVMPhase phase, int count) {
+            if (currentPhase != phase) {
+                if (currentPhase != null) {
+                    reportPhaseComplete();
+                }
+                phaseStartTime = System.currentTimeMillis();
+                switch (phase) {
+                    case DEPENDENCY_CHECKING:
+                        System.out.print("Finding methods to decompile...");
+                        break;
+                    case LINKING:
+                        System.out.print("Linking methods...");
+                        break;
+                    case DEVIRTUALIZATION:
+                        System.out.print("Applying devirtualization...");
+                        break;
+                    case DECOMPILATION:
+                        System.out.print("Decompiling...");
+                        break;
+                    case RENDERING:
+                        System.out.print("Generating output...");
+                        break;
+                }
+                currentPhase = phase;
+            }
+            return TeaVMProgressFeedback.CONTINUE;
+        }
+    };
+
+    private static void reportPhaseComplete() {
+        System.out.println(" complete for " + ((System.currentTimeMillis() - phaseStartTime) / 1000.0) + " seconds");
+    }
 
     private static void printUsage(Options options) {
         HelpFormatter formatter = new HelpFormatter();