aapt2: Add AaptManager

- capable of determining version of an aapt binary (2 or 1)
 - can return a v2/v1 aapt binary

brut.j.util/src/main/java/brut/util/AaptManager.java

@@ -0,0 +1,91 @@
+/**
+ *  Copyright (C) 2017 Ryszard Wiśniewski <brut.alll@gmail.com>
+ *  Copyright (C) 2017 Connor Tumbleson <connor.tumbleson@gmail.com>
+ *
+ *  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 brut.util;
+
+import brut.common.BrutException;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+public class AaptManager {
+
+    public static File getAppt2() throws BrutException {
+        return getAppt(2);
+    }
+
+    public static File getAppt1() throws BrutException {
+        return getAppt(1);
+    }
+
+    private static File getAppt(Integer version) throws BrutException {
+        File aaptBinary;
+        String aaptVersion = "aapt" + (version == 2 ? "2" : null);
+
+        if (! OSDetection.is64Bit() && ! OSDetection.isWindows()) {
+            throw new BrutException("32 bit OS detected. No 32 bit binaries available.");
+        }
+
+        try {
+            if (OSDetection.isMacOSX()) {
+                aaptBinary = Jar.getResourceAsFile("/prebuilt/" + aaptVersion + "/macosx/" + aaptVersion, AaptManager.class);
+            } else if (OSDetection.isUnix()) {
+                aaptBinary = Jar.getResourceAsFile("/prebuilt/" + aaptVersion + "/linux/" + aaptVersion, AaptManager.class);
+            } else if (OSDetection.isWindows()) {
+                aaptBinary = Jar.getResourceAsFile("/prebuilt/" + aaptVersion + "/windows/" + aaptVersion + ".exe", AaptManager.class);
+            } else {
+                throw new BrutException("Could not identify platform: " + OSDetection.returnOS());
+            }
+        } catch (BrutException ex) {
+            throw new BrutException(ex);
+        }
+
+        if (aaptBinary.setExecutable(true)) {
+            return aaptBinary;
+        }
+
+        throw new BrutException("Can't set aapt binary as executable");
+    }
+
+    public static int getAaptVersion(String aaptLocation) throws BrutException {
+        return getApptVersion(new File(aaptLocation));
+    }
+
+    public static int getApptVersion(File aapt) throws BrutException {
+        if (!aapt.isFile()) {
+            throw new BrutException("Could not identify aapt binary as executable.");
+        }
+        aapt.setExecutable(true);
+
+        List<String> cmd = new ArrayList<>();
+        cmd.add(aapt.getAbsolutePath());
+        cmd.add("version");
+
+        String version = OS.execAndReturn(cmd.toArray(new String[0]));
+
+        if (version == null) {
+            throw new BrutException("Could not execute aapt binary at location: " + aapt.getAbsolutePath());
+        }
+
+        if (version.startsWith("Android Asset Packaging Tool (aapt) 2:")) {
+            return 2;
+        } else if (version.startsWith("Android Asset Packaging Tool, v0.")) {
+            return 1;
+        }
+
+        throw new BrutException("aapt version could not be identified: " + version);
+    }
+}