diff options
Diffstat (limited to 'gamechestcli/gamechest/runners/extract.py')
-rw-r--r-- | gamechestcli/gamechest/runners/extract.py | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/gamechestcli/gamechest/runners/extract.py b/gamechestcli/gamechest/runners/extract.py new file mode 100644 index 0000000..e8011a7 --- /dev/null +++ b/gamechestcli/gamechest/runners/extract.py @@ -0,0 +1,96 @@ +import os +import re +import subprocess + +import humanfriendly + +from ..structures import Progress +from .runnerbase import RunnerBase, neutral_locale_variables + + +class Extract(RunnerBase): + + _progress_re = re.compile(r'^\s*(\S+)\s+\[([^]]+)/s\]\s+ETA\s+(\S+)\s*$') + + def __init__(self, src, dst): + common_parameters = dict( + encoding='utf8', + env={**os.environ, + **neutral_locale_variables, + }, + ) + self.src_size = os.stat(src).st_size + self.pv_proc = subprocess.Popen( + [ + 'pv', + '--force', + '--format', '%b %a %e', + src, + ], + stdout=subprocess.PIPE, + stderr=subprocess.PIPE, + **common_parameters, + ) + lzip_command = '/usr/bin/lzip' + plzip_command = '/usr/bin/plzip' + lzip_command_to_use = lzip_command + if os.path.exists(plzip_command): + lzip_command_to_use = plzip_command + self.zip_proc = subprocess.Popen( + [ + lzip_command_to_use, + '--decompress', + ], + stdin=self.pv_proc.stdout, + stdout=subprocess.PIPE, + **common_parameters, + ) + self.tar_proc = subprocess.Popen( + [ + 'tar', + '-C', dst, + '-xf', '-' + ], + stdin=self.zip_proc.stdout, + **common_parameters, + ) + self.last_progress = Progress() + + def get_read_fd(self): + return self.pv_proc.stderr + + def progress_read(self): + line = self.pv_proc.stderr.readline() + if match := self._progress_re.search(line): + written_bytes = humanfriendly.parse_size(match.group(1)) + self.last_progress = Progress( + nbbytes=written_bytes, + percent=int(100 * written_bytes / self.src_size), + speed=humanfriendly.parse_size(match.group(2)), + eta=match.group(3), + ) + return self.last_progress + + def terminate(self): + for proc in (self.pv_proc, self.zip_proc, self.tar_proc): + proc.terminate() + + def poll(self): + return self.tar_proc.poll() + + def close(self): + self.pv_proc.wait() + self.zip_proc.wait() + self.tar_proc.wait() + + +if __name__ == '__main__': + import sys + import contextlib + with contextlib.suppress(KeyboardInterrupt): + with Extract(sys.argv[1], sys.argv[2]) as runner: + while runner.poll() is None: + print(runner.progress_read()) + rc = runner.poll() + print('ended with code:', rc) + print('test main ended') |