AAPT2: Add diff command

Adds the diff command and various small fixes to issues
discovered when diffing old AAPT built APKs with new AAPT2
built APKS.

Bug:22775504
Change-Id: I682a7fe1cf4b3efa7cbd5d18b333cf2d1046fe1b

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/aapt2/Main.cpp b/tools/aapt2/Main.cpp
index a2fadd95db3f..00d8aaeeda55 100644
--- a/tools/aapt2/Main.cpp
+++ b/tools/aapt2/Main.cpp
@@ -24,6 +24,7 @@ namespace aapt {
 extern int compile(const std::vector<StringPiece>& args);
 extern int link(const std::vector<StringPiece>& args);
 extern int dump(const std::vector<StringPiece>& args);
+extern int diff(const std::vector<StringPiece>& args);
 
 } // namespace aapt
 
@@ -44,12 +45,14 @@ int main(int argc, char** argv) {
             return aapt::link(args);
         } else if (command == "dump" || command == "d") {
             return aapt::dump(args);
+        } else if (command == "diff") {
+            return aapt::diff(args);
         }
         std::cerr << "unknown command '" << command << "'\n";
     } else {
         std::cerr << "no command specified\n";
     }
 
-    std::cerr << "\nusage: aapt2 [compile|link|dump] ..." << std::endl;
+    std::cerr << "\nusage: aapt2 [compile|link|dump|diff] ..." << std::endl;
     return 1;
 }