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import click
@click.command()
@click.argument("input", type=click.File("rb"), nargs=-1)
@click.argument("output", type=click.File("wb"))
def cli(input, output):
"""This script works similar to the Unix `cat` command but it writes
into a specific file (which could be the standard output as denoted by
the ``-`` sign).
\b
Copy stdin to stdout:
inout - -
\b
Copy foo.txt and bar.txt to stdout:
inout foo.txt bar.txt -
\b
Write stdin into the file foo.txt
inout - foo.txt
"""
for f in input:
while True:
chunk = f.read(1024)
if not chunk:
break
output.write(chunk)
output.flush()
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