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#!/usr/bin/python3
import os
import re
import subprocess
import humanfriendly
from .structures import Progress
class Rsync:
_rsync_progress_re = re.compile(r'^\s*(\S+)\s+(\d+)%\s+(\S+)\s+(\S+)\s+$')
def __init__(self, src, dst):
self.proc = subprocess.Popen(
[
'rsync',
'--partial',
# not human readable, easier to parse (but speed still appears
# in human form).
'--no-h',
'--info=progress2',
src,
dst,
],
stdout=subprocess.PIPE,
#stderr=subprocess.DEVNULL,
encoding='utf8',
env={**os.environ,
**{'LC_ALL':'C.UTF-8',
'LANG':'C.UTF-8',
'LANGUAGE':'C.UTF-8',
}},
)
self.last_progress = Progress()
def select_fd(self):
'useful to use selectors with the process stdout file descriptor'
return self.proc.stdout
def progress_read(self):
line = self.proc.stdout.readline()
if match := self._rsync_progress_re.search(line):
self.last_progress = Progress(
int(match.group(1)),
int(match.group(2)),
humanfriendly.parse_size(match.group(3), binary=True),
match.group(4),
)
return self.last_progress
def terminate(self):
self.proc.terminate()
def poll(self):
'returns None if not terminated, otherwise return returncode'
return self.proc.poll()
def wait(self, timeout=None):
return self.proc.wait(timeout)
def __enter__(self):
return self
def __exit__(self, exc_type, value, traceback):
self.terminate()
self.wait()
if __name__ == '__main__':
import sys
import contextlib
with contextlib.suppress(KeyboardInterrupt):
with Rsync(sys.argv[1], sys.argv[2]) as rsync:
while rsync.poll() is None:
progress = rsync.progress_read()
print(f'{progress.bytes}b {progress.percent}% '
f'{progress.speed}b/s {progress.eta}')
rc = rsync.poll()
print(f'rsync ended with code: {rc}')
print('Rsync test main ended')
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