#24 Redirect dx log to IntelliJ & stop plugin execution on dx errors

src/main/kotlin/org/ollide/java2smali/Class2DexHelper.kt

@@ -1,26 +1,38 @@
 package org.ollide.java2smali
 
+import com.android.dx.command.dexer.DxContext
 import com.android.dx.command.dexer.Main
-
-import java.io.IOException
+import com.intellij.openapi.diagnostic.Logger
+import org.apache.log4j.Level
+import org.ollide.java2smali.log.LogOutputStream
 
 object Class2DexHelper {
 
     /**
-     * Uses the dx tool from the Android Build Tools (19.0.1) to create
+     * Uses the dx tool from the Android Build Tools to create
      * a .dex version of a compiled java file (.class)
      *
      * @param inputClassFilePaths full paths to the compiled .class file
      * @param outputDexPath this will be the dex output file's path and name
-     * @throws IOException
+     * @return `true` if dx ran successfully, otherwise `false`
      */
-    @Throws(IOException::class)
-    fun dexClassFile(inputClassFilePaths: Array<String>, outputDexPath: String) {
+    fun dexClassFile(inputClassFilePaths: Array<String>, outputDexPath: String): Boolean {
+        val dxContext = DxContext(LogOutputStream(LOG, Level.INFO), LogOutputStream(LOG, Level.ERROR))
+
         val arguments = Main.Arguments()
         arguments.outName = outputDexPath
         arguments.strictNameCheck = false
         arguments.fileNames = inputClassFilePaths
 
-        Main.run(arguments)
+        return try {
+            val returnCode = Main(dxContext).runDx(arguments)
+            returnCode == 0
+        } catch (e: Exception) {
+            LOG.error("Failed to run dx", e)
+            false
+        }
     }
+
+    private val LOG = Logger.getInstance(Class2DexHelper::class.java)
+
 }

src/main/kotlin/org/ollide/java2smali/DexCompiler.kt

@@ -16,7 +16,6 @@ import com.intellij.util.SmartList
 import com.intellij.util.containers.OrderedSet
 import com.intellij.util.io.URLUtil
 import java.io.File
-import java.io.IOException
 import java.nio.file.Paths
 
 class DexCompiler(private val vFile: VirtualFile, private val project: Project, private val module: Module) {
@@ -59,7 +58,10 @@ class DexCompiler(private val vFile: VirtualFile, private val project: Project,
 
         // CLASS -> DEX
         val targetFiles = getClassFiles(fileOutputDirectory, fileName)
-        compileDexFile(targetFiles, dexFilePath)
+        val successfulDex = Class2DexHelper.dexClassFile(targetFiles, dexFilePath)
+        if (!successfulDex) {
+            return
+        }
 
         // DEX -> SMALI
         val outputDir = getSourceRootFile().path
@@ -144,15 +146,6 @@ class DexCompiler(private val vFile: VirtualFile, private val project: Project,
         return OrderedSet(outputPaths)
     }
 
-    private fun compileDexFile(compiledPaths: Array<String>, dexFile: String) {
-        try {
-            Class2DexHelper.dexClassFile(compiledPaths, dexFile)
-        } catch (e: IOException) {
-            e.printStackTrace()
-            return
-        }
-    }
-
     private fun getSourceRootFile(): VirtualFile {
         return ProjectRootManager.getInstance(project).fileIndex.getSourceRootForFile(vFile) as VirtualFile
     }

src/main/kotlin/org/ollide/java2smali/log/LogOutputStream.kt

@@ -0,0 +1,32 @@
+package org.ollide.java2smali.log
+
+import com.intellij.openapi.diagnostic.Logger
+import org.apache.log4j.Level
+import java.io.OutputStream
+
+/**
+ * Wraps IntelliJ's [com.intellij.openapi.diagnostic.Logger] as an [java.io.OutputStream].
+ */
+class LogOutputStream(private val logger: Logger, private val level: Level) : OutputStream() {
+
+    private var msg = ""
+
+    override fun write(b: Int) {
+        val bytes = ByteArray(1)
+        bytes[0] = (b and 0xff).toByte()
+        msg += String(bytes)
+        if (msg.endsWith("\n")) {
+            msg = msg.substring(0, msg.length - 1)
+            flush()
+        }
+    }
+
+    override fun flush() {
+        if (level === Level.ERROR || level === Level.FATAL) {
+            logger.error(msg)
+        } else {
+            logger.info(msg)
+        }
+        msg = ""
+    }
+}