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End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

FileUtils.copy_stream

copy_stream(src, dest)

Copies stream src to dest. src must respond to read(n) and dest must respond to write(str).

See also #copy_stream .copy_file .cp .copy_entry also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0