Fix delete bug and documentate

src/core/file_sys/vfs.h

@@ -173,9 +173,21 @@ struct VfsDirectory : NonCopyable {
     // operation failed.
     virtual std::shared_ptr<VfsFile> CreateFile(const std::string& name) = 0;
 
+    // Creates a new file at the path relative to this directory. Also creates directories if
+    // they do not exist and is supported by this implementation. Returns nullptr on any failure.
     virtual std::shared_ptr<VfsFile> CreateFileRelative(const std::string& path);
+
+    // Creates a new file at the path relative to root of this directory. Also creates directories
+    // if they do not exist and is supported by this implementation. Returns nullptr on any failure.
     virtual std::shared_ptr<VfsFile> CreateFileAbsolute(const std::string& path);
+
+    // Creates a new directory at the path relative to this directory. Also creates directories if
+    // they do not exist and is supported by this implementation. Returns nullptr on any failure.
     virtual std::shared_ptr<VfsDirectory> CreateDirectoryRelative(const std::string& path);
+
+    // Creates a new directory at the path relative to root of this directory. Also creates
+    // directories if they do not exist and is supported by this implementation. Returns nullptr on
+    // any failure.
     virtual std::shared_ptr<VfsDirectory> CreateDirectoryAbsolute(const std::string& path);
 
     // Deletes the subdirectory with name and returns true on success.

src/core/file_sys/vfs_real.cpp

@@ -76,6 +76,10 @@ bool RealVfsFile::Rename(const std::string& name) {
     return out;
 }
 
+bool RealVfsFile::Close() {
+    return backing.Close();
+}
+
 RealVfsDirectory::RealVfsDirectory(const std::string& path_, Mode perms_)
     : path(FileUtil::RemoveTrailingSlash(path_)), parent_path(FileUtil::GetParentPath(path)),
       path_components(FileUtil::SplitPathComponents(path)),
@@ -146,6 +150,12 @@ bool RealVfsDirectory::DeleteSubdirectory(const std::string& name) {
 }
 
 bool RealVfsDirectory::DeleteFile(const std::string& name) {
+    auto file = GetFile(name);
+    if (file == nullptr)
+        return false;
+    files.erase(std::find(files.begin(), files.end(), file));
+    auto real_file = dynamic_cast<RealVfsFile*>(file.get());
+    real_file->Close();
     return FileUtil::Delete(path + DIR_SEP + name);
 }
 

src/core/file_sys/vfs_real.h

@@ -12,6 +12,8 @@ namespace FileSys {
 
 // An implmentation of VfsFile that represents a file on the user's computer.
 struct RealVfsFile : public VfsFile {
+    friend struct RealVfsDirectory;
+
     RealVfsFile(const std::string& name, Mode perms = Mode::Read);
 
     std::string GetName() const override;
@@ -25,6 +27,8 @@ struct RealVfsFile : public VfsFile {
     bool Rename(const std::string& name) override;
 
 private:
+    bool Close();
+
     FileUtil::IOFile backing;
     std::string path;
     std::string parent_path;