Add support to append in VFS

(cherry picked from commit 9495b1087a937a6175dda075bdd082864c09dc21)

Change-Id: Iccece3057dcac434c24c29c152ed65e32d6ba18f

4 files changed, 15 insertions, 20 deletions

diff --git a/jack/src/com/android/jack/incremental/IncrementalInputFilter.java b/jack/src/com/android/jack/incremental/IncrementalInputFilter.java
index 887abcb..1330ada 100644
--- a/jack/src/com/android/jack/incremental/IncrementalInputFilter.java
+++ b/jack/src/com/android/jack/incremental/IncrementalInputFilter.java
@@ -199,9 +199,7 @@ public class IncrementalInputFilter extends CommonFilter implements InputFilter
     if (config.get(INCREMENTAL_LOG).booleanValue()) {
       IncrementalLogWriter incLog;
       try {
-        VFS incrementalFolder = config.get(Options.LIBRARY_OUTPUT_DIR);
-        assert incrementalFolder != null;
-        incLog = new IncrementalLogWriter(getOutputJackLibrary(), incrementalFolder);
+        incLog = new IncrementalLogWriter(getOutputJackLibrary());
         incLog.writeString("type: " + (incrementalInputLibrary == null ? "full" : "incremental"));
         incLog.writeLibraryDescriptions("classpath", classpathContent);
         incLog.writeStrings("classpath digests (" + (libraryDependencies.hasSameLibraryOnClasspath(
diff --git a/jack/src/com/android/jack/incremental/IncrementalLogWriter.java b/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
index ec7016a..d7e03f8 100644
--- a/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
+++ b/jack/src/com/android/jack/incremental/IncrementalLogWriter.java
@@ -26,12 +26,10 @@ import com.android.jack.library.InputLibrary;
 import com.android.jack.library.LibraryIOException;
 import com.android.jack.library.OutputJackLibrary;
 import com.android.sched.util.file.CannotCreateFileException;
-import com.android.sched.vfs.VFS;
+import com.android.sched.util.file.WrongPermissionException;
+import com.android.sched.vfs.OutputVFile;
 import com.android.sched.vfs.VPath;
 
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.PrintStream;
 import java.util.Collection;
 
@@ -55,27 +53,24 @@ class IncrementalLogWriter {
   @Nonnull
   private static Joiner commaJoiner = Joiner.on(",").useForNull("");
 
-  IncrementalLogWriter(@Nonnull OutputJackLibrary library, @Nonnull VFS incrementalFolder)
-      throws LibraryIOException {
+  IncrementalLogWriter(@Nonnull OutputJackLibrary library) throws LibraryIOException {
     this.library = library;
+    OutputVFile vFile;
     try {
-      library.getFile(FileType.LOG, vpath);
+      vFile = library.getFile(FileType.LOG, vpath);
     } catch (FileTypeDoesNotExistException e) {
       try {
-        library.createFile(FileType.LOG, vpath);
+        vFile = library.createFile(FileType.LOG, vpath);
       } catch (CannotCreateFileException e1) {
         throw new LibraryIOException(library.getLocation(), e1);
       }
     }
 
-    File logFile = new File(incrementalFolder.getPath(),
-        FileType.LOG.buildFileVPath(vpath).getPathAsString(File.separatorChar));
     try {
-      ps = new PrintStream(new FileOutputStream(logFile, true));
+      ps = new PrintStream(vFile.getPrintStream(/* append = */ true));
       writeString("***");
-    } catch (FileNotFoundException e) {
-      // File already creates by using VFS
-      throw new AssertionError();
+    } catch (WrongPermissionException e) {
+      throw new LibraryIOException(library.getLocation(), e);
     }
   }
 
diff --git a/jack/src/com/android/jack/library/OutputLibrary.java b/jack/src/com/android/jack/library/OutputLibrary.java
index 1e54346..f365d8a 100644
--- a/jack/src/com/android/jack/library/OutputLibrary.java
+++ b/jack/src/com/android/jack/library/OutputLibrary.java
@@ -18,6 +18,7 @@ package com.android.jack.library;
 
 import com.android.sched.util.file.CannotCreateFileException;
 import com.android.sched.util.file.CannotDeleteFileException;
+import com.android.sched.vfs.InputOutputVFile;
 import com.android.sched.vfs.InputVFile;
 import com.android.sched.vfs.OutputVFile;
 import com.android.sched.vfs.VPath;
@@ -46,7 +47,7 @@ public interface OutputLibrary extends Library {
   public Iterator<InputVFile> iterator(@Nonnull FileType fileType);
 
   @Nonnull
-  public InputVFile getFile(@Nonnull FileType fileType, @Nonnull VPath typePath)
+  public InputOutputVFile getFile(@Nonnull FileType fileType, @Nonnull VPath typePath)
       throws FileTypeDoesNotExistException;
 
   @Nonnull
diff --git a/jack/src/com/android/jack/library/v0001/OutputJackLibraryImpl.java b/jack/src/com/android/jack/library/v0001/OutputJackLibraryImpl.java
index 3a7f311..2c9eefd 100644
--- a/jack/src/com/android/jack/library/v0001/OutputJackLibraryImpl.java
+++ b/jack/src/com/android/jack/library/v0001/OutputJackLibraryImpl.java
@@ -39,6 +39,7 @@ import com.android.sched.vfs.GenericInputOutputVFS;
 import com.android.sched.vfs.GenericInputVFS;
 import com.android.sched.vfs.GenericOutputVFS;
 import com.android.sched.vfs.InputOutputVFS;
+import com.android.sched.vfs.InputOutputVFile;
 import com.android.sched.vfs.InputVFS;
 import com.android.sched.vfs.InputVFile;
 import com.android.sched.vfs.MessageDigestFS;
@@ -245,10 +246,10 @@ public class OutputJackLibraryImpl extends CommonJackLibrary implements OutputJa
 
   @Override
   @Nonnull
-  public InputVFile getFile(@Nonnull FileType fileType, @Nonnull VPath typePath)
+  public InputOutputVFile getFile(@Nonnull FileType fileType, @Nonnull VPath typePath)
       throws FileTypeDoesNotExistException {
     try {
-      return getSectionVFS(fileType).getRootInputVDir()
+      return getSectionVFS(fileType).getRootInputOutputVDir()
           .getInputVFile(buildFileVPath(fileType, typePath));
     } catch (NotFileOrDirectoryException e) {
       throw new FileTypeDoesNotExistException(getLocation(), typePath, fileType);