refactor: rename the atom directory to shell

shell/common/asar/archive.h

@@ -0,0 +1,87 @@
+// Copyright (c) 2014 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_ASAR_ARCHIVE_H_
+#define ATOM_COMMON_ASAR_ARCHIVE_H_
+
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+#include "base/files/file.h"
+#include "base/files/file_path.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace asar {
+
+class ScopedTemporaryFile;
+
+// This class represents an asar package, and provides methods to read
+// information from it.
+class Archive {
+ public:
+  struct FileInfo {
+    FileInfo() : unpacked(false), executable(false), size(0), offset(0) {}
+    bool unpacked;
+    bool executable;
+    uint32_t size;
+    uint64_t offset;
+  };
+
+  struct Stats : public FileInfo {
+    Stats() : is_file(true), is_directory(false), is_link(false) {}
+    bool is_file;
+    bool is_directory;
+    bool is_link;
+  };
+
+  explicit Archive(const base::FilePath& path);
+  virtual ~Archive();
+
+  // Read and parse the header.
+  bool Init();
+
+  // Get the info of a file.
+  bool GetFileInfo(const base::FilePath& path, FileInfo* info);
+
+  // Fs.stat(path).
+  bool Stat(const base::FilePath& path, Stats* stats);
+
+  // Fs.readdir(path).
+  bool Readdir(const base::FilePath& path, std::vector<base::FilePath>* files);
+
+  // Fs.realpath(path).
+  bool Realpath(const base::FilePath& path, base::FilePath* realpath);
+
+  // Copy the file into a temporary file, and return the new path.
+  // For unpacked file, this method will return its real path.
+  bool CopyFileOut(const base::FilePath& path, base::FilePath* out);
+
+  // Returns the file's fd.
+  int GetFD() const;
+
+  base::FilePath path() const { return path_; }
+  base::DictionaryValue* header() const { return header_.get(); }
+
+ private:
+  base::FilePath path_;
+  base::File file_;
+  int fd_ = -1;
+  uint32_t header_size_ = 0;
+  std::unique_ptr<base::DictionaryValue> header_;
+
+  // Cached external temporary files.
+  std::unordered_map<base::FilePath::StringType,
+                     std::unique_ptr<ScopedTemporaryFile>>
+      external_files_;
+
+  DISALLOW_COPY_AND_ASSIGN(Archive);
+};
+
+}  // namespace asar
+
+#endif  // ATOM_COMMON_ASAR_ARCHIVE_H_