text: /*
   * Copyright 2016 WebAssembly Community Group participants
   *
   * 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.
   */
  
  //
  // wasm2asm console tool
  //
  
  #include "support/colors.h"
  #include "support/file.h"
  #include "wasm-io.h"
  #include "wasm-s-parser.h"
  #include "wasm-validator.h"
  
  #include "tool-options.h"
  #include "tool-utils.h"
  
  using namespace cashew;
  using namespace wasm;
  
  int main(int argc, const char* argv[]) {
    bool debugInfo = false;
    std::string symbolMap;
    std::string sourceMapFilename;
    std::string sourceMapUrl;
    ToolOptions options("wasm-as",
                        "Assemble a .wat (WebAssembly text format) into a .wasm "
                        "(WebAssembly binary format)");
    options.extra["validate"] = "wasm";
    options
      .add("--output",
           "-o",
           "Output file (stdout if not specified)",
           Options::Arguments::One,
           [](Options* o, const std::string& argument) {
             o->extra["output"] = argument;
             Colors::setEnabled(false);
           })
      .add("--validate",
           "-v",
           "Control validation of the output module",
           Options::Arguments::One,
           [](Options* o, const std::string& argument) {
             if (argument != "web" && argument != "none" && argument != "wasm") {
               Fatal() << "Valid arguments for --validate flag are 'wasm', "
                          "'web', and 'none'.\n";
             }
             o->extra["validate"] = argument;
           })
      .add("--debuginfo",
           "-g",
           "Emit names section and debug info",
           Options::Arguments::Zero,
           [&](Options* o, const std::string& arguments) { debugInfo = true; })
      .add("--source-map",
           "-sm",
           "Emit source map to the specified file",
           Options::Arguments::One,
           [&sourceMapFilename](Options* o, const std::string& argument) {
             sourceMapFilename = argument;
           })
      .add("--source-map-url",
           "-su",
           "Use specified string as source map URL",
           Options::Arguments::One,
           [&sourceMapUrl](Options* o, const std::string& argument) {
             sourceMapUrl = argument;
           })
      .add("--symbolmap",
           "-s",
           "Emit a symbol map (indexes => names)",
           Options::Arguments::One,
           [&](Options* o, const std::string& argument) { symbolMap = argument; })
      .add_positional("INFILE",
                      Options::Arguments::One,
                      [](Options* o, const std::string& argument) {
                        o->extra["infile"] = argument;
                      });
    options.parse(argc, argv);
  
    // default output is infile with changed suffix
    if (options.extra.find("output") == options.extra.end()) {
      options.extra["output"] =
        removeSpecificSuffix(options.extra["infile"], ".wat") + ".wasm";
    }
  
    auto input(read_file<std::string>(options.extra["infile"], Flags::Text));
  
    Module wasm;
  
    try {
      if (options.debug) {
        std::cerr << "s-parsing..." << std::endl;
      }
      SExpressionParser parser(const_cast<char*>(input.c_str()));
      Element& root = *parser.root;
      if (options.debug) {
        std::cerr << "w-parsing..." << std::endl;
      }
      SExpressionWasmBuilder builder(wasm, *root[0], options.profile);
    } catch (ParseException& p) {
      p.dump(std::cerr);
      Fatal() << "error in parsing input";
    }
  
    options.applyFeatures(wasm);
  
    if (options.extra["validate"] != "none") {
      if (options.debug) {
        std::cerr << "Validating..." << std::endl;
      }
      if (!wasm::WasmValidator().validate(
            wasm,
            WasmValidator::Globally |
              (options.extra["validate"] == "web" ? WasmValidator::Web : 0))) {
        Fatal() << "Error: input module is not valid.\n";
      }
    }
  
    if (options.debug) {
      std::cerr << "writing..." << std::endl;
    }
    ModuleWriter writer;
    writer.setBinary(true);
    writer.setDebugInfo(debugInfo);
    if (sourceMapFilename.size()) {
      writer.setSourceMapFilename(sourceMapFilename);
      writer.setSourceMapUrl(sourceMapUrl);
    }
    if (symbolMap.size() > 0) {
      writer.setSymbolMap(symbolMap);
    }
    writer.write(wasm, options.extra["output"]);
  
    if (options.debug) {
      std::cerr << "Done." << std::endl;
    }
  }
  