[Android] Reland of 'Add zip pushing and refine push mode selection.'

build/android/pylib/device/commands/java/src/org/chromium/android/commands/unzip/Unzip.java

Index: build/android/pylib/device/commands/java/src/org/chromium/android/commands/unzip/Unzip.java
diff --git a/build/android/pylib/device/commands/java/src/org/chromium/android/commands/unzip/Unzip.java b/build/android/pylib/device/commands/java/src/org/chromium/android/commands/unzip/Unzip.java
new file mode 100644
index 0000000000000000000000000000000000000000..4d2a04518ecea6666648c76e1a917d130a57643e
--- /dev/null
+++ b/build/android/pylib/device/commands/java/src/org/chromium/android/commands/unzip/Unzip.java
@@ -0,0 +1,94 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.android.commands.unzip;
+
+import android.util.Log;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+/**
+ *  Minimal implementation of the command-line unzip utility for Android.
+ */
+public class Unzip {
+
+    private static final String TAG = "Unzip";
+
+    public static void main(String[] args) {
+        try {
+            (new Unzip()).run(args);
+        } catch (RuntimeException e) {
+            Log.e(TAG, e.toString());
+            System.exit(1);
+        }
+    }
+
+    private void showUsage(PrintStream s) {
+        s.println("Usage:");
+        s.println("unzip [zipfile]");
+    }
+
+    private void unzip(String[] args) {
+        ZipInputStream zis = null;
+        try {
+            String zipfile = args[0];
+            zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipfile)));
+            ZipEntry ze = null;
+
+            byte[] bytes = new byte[1024];
+            while ((ze = zis.getNextEntry()) != null) {
+                File outputFile = new File(ze.getName());
+                if (ze.isDirectory()) {
+                    if (!outputFile.exists() && !outputFile.mkdirs()) {
+                        throw new RuntimeException(
+                                "Failed to create directory: " + outputFile.toString());
+                    }
+                } else {
+                    File parentDir = outputFile.getParentFile();
+                    if (!parentDir.exists() && !parentDir.mkdirs()) {
+                        throw new RuntimeException(
+                                "Failed to create directory: " + parentDir.toString());
+                    }
+                    OutputStream out = new BufferedOutputStream(new FileOutputStream(outputFile));
+                    int actual_bytes = 0;
+                    int total_bytes = 0;
+                    while ((actual_bytes = zis.read(bytes)) != -1) {
+                        out.write(bytes, 0, actual_bytes);
+                        total_bytes += actual_bytes;
+                    }
+                    out.close();
+                }
+                zis.closeEntry();
+            }
+
+        } catch (IOException e) {
+            throw new RuntimeException("Error while unzipping: " + e.toString());
+        } finally {
+            try {
+                if (zis != null) zis.close();
+            } catch (IOException e) {
+                throw new RuntimeException("Error while closing zip: " + e.toString());
+            }
+        }
+    }
+
+    public void run(String[] args) {
+        if (args.length != 1) {
+            showUsage(System.err);
+            throw new RuntimeException("Incorrect usage.");
+        }
+
+        unzip(args);
+    }
+}
+