net/instaweb/rewriter/css_minify_main.cc

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */


#include <cstdio>
#include <cstdlib>

#include "net/instaweb/rewriter/public/css_minify.h"
#include "pagespeed/kernel/base/file_message_handler.h"
#include "pagespeed/kernel/base/file_system.h"
#include "pagespeed/kernel/base/file_writer.h"
#include "pagespeed/kernel/base/stdio_file_system.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/util/gflags.h"

namespace net_instaweb {

bool MinifyCss_main(int argc, char** argv) {
  StdioFileSystem file_system;
  FileMessageHandler handler(stderr);
  FileSystem::OutputFile* error_file = file_system.Stderr();

  // Load command line args.
  static const char kUsage[] = "Usage: css_minify infilename\n";
  if (argc != 2) {
    error_file->Write(kUsage, &handler);
    return false;
  }

  const char* infilename = argv[1];

  // Read text from file.
  GoogleString in_text;
  if (!file_system.ReadFile(infilename, &in_text, &handler)) {
    error_file->Write(StringPrintf(
        "Failed to read input file %s\n", infilename), &handler);
    return false;
  }

  FileWriter writer(file_system.Stdout());
  FileWriter error_writer(error_file);
  CssMinify minify(&writer, &handler);
  minify.set_error_writer(&error_writer);
  return minify.ParseStylesheet(in_text);
}

}  // namespace net_instaweb

int main(int argc, char** argv) {
  net_instaweb::ParseGflags(argv[0], &argc, &argv);
  return net_instaweb::MinifyCss_main(argc, argv) ? EXIT_SUCCESS : EXIT_FAILURE;
}