func doGrowFile()

in file.go [714:735]

• 17 lines of code
• 6 McCabe index (conditional complexity)

func doGrowFile(f *File, opts Options) reason {
	maxPages, maxSize, err := initTxMaxSize(f, opts.MaxSize)
	if err != nil {
		return err
	}

	// Transaction completed. Update file allocator limits
	f.allocator.maxPages = maxPages
	f.allocator.maxSize = maxSize

	// Allocate space on disk if prealloc is enabled and new file size is bounded.
	if opts.Prealloc && maxSize > 0 {
		if err := f.truncate(int64(maxSize)); err != nil {
			return err
		}
		if err := f.mmapUpdate(); err != nil {
			return wrapErr(err)
		}
	}

	return nil
}