AAPT2: Refactor flags into commands

Refactors the flag based command invocation into classes that make using
subcommands easier.

Test: manual tests of printing
Change-Id: Ic8df6af0be30db552e32150afebecbfeec7e1075
diff --git a/tools/aapt2/cmd/Compile.h b/tools/aapt2/cmd/Compile.h
index d95cf1c..4151952 100644
--- a/tools/aapt2/cmd/Compile.h
+++ b/tools/aapt2/cmd/Compile.h
@@ -1,13 +1,69 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
 #ifndef AAPT2_COMPILE_H
 #define AAPT2_COMPILE_H
 
 #include "androidfw/StringPiece.h"
 
+#include "Command.h"
 #include "Diagnostics.h"
+#include "ResourceTable.h"
 
 namespace aapt {
 
-  int Compile(const std::vector<android::StringPiece>& args, IDiagnostics* diagnostics);
+struct CompileOptions {
+  std::string output_path;
+  Maybe<std::string> res_dir;
+  Maybe<std::string> generate_text_symbols_path;
+  Maybe<Visibility::Level> visibility;
+  bool pseudolocalize = false;
+  bool no_png_crunch = false;
+  bool legacy_mode = false;
+  bool verbose = false;
+};
+
+class CompileCommand : public Command {
+ public:
+  explicit CompileCommand(IDiagnostics* diagnostic) : Command("compile", "c"),
+                                                      diagnostic_(diagnostic) {
+    SetDescription("Compiles resources to be linked into an apk.");
+    AddRequiredFlag("-o", "Output path", &options_.output_path);
+    AddOptionalFlag("--dir", "Directory to scan for resources", &options_.res_dir);
+    AddOptionalFlag("--output-text-symbols",
+        "Generates a text file containing the resource symbols in the\n"
+            "specified file", &options_.generate_text_symbols_path);
+    AddOptionalSwitch("--pseudo-localize", "Generate resources for pseudo-locales "
+        "(en-XA and ar-XB)", &options_.pseudolocalize);
+    AddOptionalSwitch("--no-crunch", "Disables PNG processing", &options_.no_png_crunch);
+    AddOptionalSwitch("--legacy", "Treat errors that used to be valid in AAPT as warnings",
+        &options_.legacy_mode);
+    AddOptionalSwitch("-v", "Enables verbose logging", &options_.verbose);
+    AddOptionalFlag("--visibility",
+        "Sets the visibility of the compiled resources to the specified\n"
+            "level. Accepted levels: public, private, default", &visibility_);
+  }
+
+  int Action(const std::vector<std::string>& args) override;
+
+ private:
+  IDiagnostics* diagnostic_;
+  CompileOptions options_;
+  Maybe<std::string> visibility_;
+};
 
 }// namespace aapt