Report error in JPS when TeaVM build crashes

tools/idea/jps-common/src/main/java/org/teavm/idea/jps/model/TeaVMBuildResult.java

@@ -24,6 +24,8 @@ public interface TeaVMBuildResult {
 
     boolean isErrorOccurred();
 
+    String getStackTrace();
+
     ProblemProvider getProblems();
 
     Collection<String> getUsedResources();

tools/idea/jps-common/src/main/java/org/teavm/idea/jps/remote/TeaVMRemoteBuildResponse.java

@@ -31,4 +31,5 @@ public class TeaVMRemoteBuildResponse implements Serializable {
     public final Set<String> usedResources = new HashSet<>();
     public final Set<String> classes = new HashSet<>();
     public final Set<String> generatedFiles = new HashSet<>();
+    public String stackTrace;
 }

tools/idea/jps-common/src/main/java/org/teavm/idea/jps/util/ExceptionUtil.java

@@ -0,0 +1,32 @@
+/*
+ *  Copyright 2017 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.idea.jps.util;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+public final class ExceptionUtil {
+    private ExceptionUtil() {
+    }
+
+    public static String exceptionToString(Throwable e) {
+        StringWriter writer = new StringWriter();
+        PrintWriter output = new PrintWriter(writer);
+        e.printStackTrace(output);
+        output.close();
+        return writer.toString();
+    }
+}

tools/idea/jps-plugin/src/main/java/org/teavm/idea/jps/InProcessBuildStrategy.java

@@ -29,6 +29,7 @@ import org.teavm.callgraph.CallGraph;
 import org.teavm.diagnostics.ProblemProvider;
 import org.teavm.idea.jps.model.TeaVMBuildResult;
 import org.teavm.idea.jps.model.TeaVMBuildStrategy;
+import org.teavm.idea.jps.util.ExceptionUtil;
 import org.teavm.tooling.EmptyTeaVMToolLog;
 import org.teavm.tooling.TeaVMTargetType;
 import org.teavm.tooling.TeaVMTool;
@@ -135,10 +136,12 @@ public class InProcessBuildStrategy implements TeaVMBuildStrategy {
         }
 
         boolean errorOccurred = false;
+        String stackTrace = null;
         try {
             tool.generate();
         } catch (TeaVMToolException | RuntimeException | Error e) {
             e.printStackTrace(System.err);
+            stackTrace = ExceptionUtil.exceptionToString(e);
             context.processMessage(new CompilerMessage("TeaVM", e));
             errorOccurred = true;
         }
@@ -147,7 +150,7 @@ public class InProcessBuildStrategy implements TeaVMBuildStrategy {
                 .map(File::getAbsolutePath)
                 .collect(Collectors.toSet());
 
-        return new InProcessBuildResult(tool.getDependencyInfo().getCallGraph(), errorOccurred,
+        return new InProcessBuildResult(tool.getDependencyInfo().getCallGraph(), errorOccurred, stackTrace,
                 tool.getProblemProvider(), tool.getClasses(), tool.getUsedResources(), generatedFiles);
     }
 
@@ -168,15 +171,18 @@ public class InProcessBuildStrategy implements TeaVMBuildStrategy {
     static class InProcessBuildResult implements TeaVMBuildResult {
         private CallGraph callGraph;
         private boolean errorOccurred;
+        private String stackTrace;
         private ProblemProvider problemProvider;
         private Collection<String> classes;
         private Collection<String> usedResources;
         private Collection<String> generatedFiles;
 
-        InProcessBuildResult(CallGraph callGraph, boolean errorOccurred, ProblemProvider problemProvider,
+        InProcessBuildResult(CallGraph callGraph, boolean errorOccurred, String stackTrace,
-                Collection<String> classes, Collection<String> usedResources, Collection<String> generatedFiles) {
+                ProblemProvider problemProvider, Collection<String> classes, Collection<String> usedResources,
+                Collection<String> generatedFiles) {
             this.callGraph = callGraph;
             this.errorOccurred = errorOccurred;
+            this.stackTrace = stackTrace;
             this.problemProvider = problemProvider;
             this.classes = classes;
             this.usedResources = usedResources;
@@ -193,6 +199,11 @@ public class InProcessBuildStrategy implements TeaVMBuildStrategy {
             return errorOccurred;
         }
 
+        @Override
+        public String getStackTrace() {
+            return stackTrace;
+        }
+
         @Override
         public ProblemProvider getProblems() {
             return problemProvider;

tools/idea/jps-plugin/src/main/java/org/teavm/idea/jps/RemoteBuildStrategy.java

@@ -133,6 +133,11 @@ public class RemoteBuildStrategy implements TeaVMBuildStrategy {
                 return response.errorOccurred;
             }
 
+            @Override
+            public String getStackTrace() {
+                return response.stackTrace;
+            }
+
             @Override
             public ProblemProvider getProblems() {
                 return problems;

tools/idea/jps-plugin/src/main/java/org/teavm/idea/jps/TeaVMBuild.java

@@ -122,9 +122,17 @@ class TeaVMBuild {
 
         reportProblems(buildResult.getProblems(), buildResult.getCallGraph());
 
+        if (!buildResult.isErrorOccurred()) {
             for (String fileName : buildResult.getGeneratedFiles()) {
                 outputConsumer.registerOutputFile(new File(fileName), Collections.emptyList());
             }
+        }
+
+        if (buildResult.getStackTrace() != null) {
+            context.processMessage(new CompilerMessage("TeaVM", BuildMessage.Kind.ERROR,
+                    "Compiler crashed:\n" + buildResult.getStackTrace(), "",
+                    -1, -1, -1, -1, -1));
+        }
 
         return true;
     }

tools/idea/plugin/src/main/java/org/teavm/idea/daemon/TeaVMBuildDaemon.java

@@ -47,6 +47,7 @@ import org.teavm.idea.jps.remote.TeaVMRemoteBuildCallback;
 import org.teavm.idea.jps.remote.TeaVMRemoteBuildRequest;
 import org.teavm.idea.jps.remote.TeaVMRemoteBuildResponse;
 import org.teavm.idea.jps.remote.TeaVMRemoteBuildService;
+import org.teavm.idea.jps.util.ExceptionUtil;
 import org.teavm.tooling.EmptyTeaVMToolLog;
 import org.teavm.tooling.TeaVMTool;
 import org.teavm.tooling.TeaVMToolException;
@@ -191,16 +192,18 @@ public class TeaVMBuildDaemon extends UnicastRemoteObject implements TeaVMRemote
         }
 
         boolean errorOccurred = false;
+        String stackTrace = null;
         try {
             tool.generate();
             System.out.println("Build complete");
         } catch (TeaVMToolException | RuntimeException | Error e) {
-            e.printStackTrace(System.err);
+            stackTrace = ExceptionUtil.exceptionToString(e);
             errorOccurred = true;
         }
 
         TeaVMRemoteBuildResponse response = new TeaVMRemoteBuildResponse();
         response.errorOccurred = errorOccurred;
+        response.stackTrace = stackTrace;
         response.callGraph = tool.getDependencyInfo().getCallGraph();
         response.problems.addAll(tool.getProblemProvider().getProblems());
         response.severeProblems.addAll(tool.getProblemProvider().getSevereProblems());