410 lines
11 KiB
Python
410 lines
11 KiB
Python
import argparse
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import os
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import re
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import send2trash
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import shutil
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import sys
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import time
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from voussoirkit import betterhelp
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from voussoirkit import bytestring
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from voussoirkit import pathclass
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from voussoirkit import winglob
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RESERVE_SPACE_ON_DRIVE = 30 * bytestring.GIBIBYTE
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class RarParException(Exception):
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pass
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class NotEnoughSpace(RarParException):
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pass
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def RARCOMMAND(
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basename,
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input_pattern,
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workdir,
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password=None,
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rec=None,
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rev=None,
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volume=None,
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):
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'''
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winrar
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a = make archive
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-ibck = run in the background
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-ma = rar5 mode
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-m0 = compression level: store
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-mt1 = thread count: 1
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-v{x}M = split into x megabyte volumes
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-ri x:y = x priority (lower is less pri) y ms sleep between ops
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-r = include subdirectories
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-ep1 = arcnames will start relative to the main folder,
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instead of having the whole abspath of the input_pattern.
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-rr{x}% = x% recovery record
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-rv{x}% = x% recovery volumes
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-hp{x} = encrypt with password x
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-y = yes on all prompts
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-x = exclude certain filenames
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destination
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workdir/basename.rar
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files to include
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input_pattern
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'''
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command = [
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'winrar',
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'a -ibck -ma -m0 -mt1 -ri1:30 -r -ep1',
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'-y -xthumbs.db -xdesktop.ini',
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]
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if volume is not None:
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command.append(f'-v{volume}M')
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if rec is not None:
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command.append(f'-rr{rec}%')
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if rev is not None:
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command.append(f'-rv{rev}%')
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if password is not None:
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command.append(f'-hp{password}')
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command.append(f'"{workdir.absolute_path}{os.sep}{basename}.rar"')
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command.append(f'"{input_pattern}"')
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command = ' '.join(command)
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return command
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def PARCOMMAND(workdir, basename, par):
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'''
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phpar2
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c = create pars
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-t1 = thread count: 1
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-r{x} = x% recovery
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destination
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workdir/basename.par2
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'''
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command = [
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'phpar2',
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'c -t1',
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f'-r{par}',
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f'"{workdir.absolute_path}{os.sep}{basename}"',
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f'"{workdir.absolute_path}{os.sep}{basename}*.rar"',
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]
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command = ' '.join(command)
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return command
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def assert_enough_space(pathsize, workdir, moveto, rec, rev, par):
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plus_percent = (rec + rev + par) / 100
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needed = pathsize * (1 + plus_percent)
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reserve = RESERVE_SPACE_ON_DRIVE + needed
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workdir_drive = os.path.splitdrive(workdir.absolute_path)[0]
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free_space = shutil.disk_usage(workdir_drive).free
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if moveto is not None:
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moveto_drive = os.path.splitdrive(moveto.absolute_path)[0]
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free_space = min(free_space, shutil.disk_usage(moveto_drive).free)
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message = ' '.join([
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f'For {bytestring.bytestring(pathsize)},',
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f'Reserving {bytestring.bytestring(reserve)} /',
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f'{bytestring.bytestring(free_space)}.',
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])
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print(message)
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if reserve > free_space:
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raise NotEnoughSpace('Please leave more space')
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def move(pattern, directory):
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files = winglob.glob(pattern)
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for file in files:
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print(file)
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shutil.move(file, directory)
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def _normalize_percentage(rec):
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if rec is None:
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return None
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if rec == 0:
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return None
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if isinstance(rec, str):
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rec = rec.strip('%')
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rec = int(rec)
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if not (0 <= rec <= 100):
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raise ValueError(f'rec, rev, par {rec} must be 0-100.')
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return rec
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def normalize_password(password):
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if password is None:
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return None
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if not isinstance(password, str):
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raise TypeError(f'password must be a {str}, not {type(password)}')
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if password == '':
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return None
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return password
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def _normalize_volume(volume, pathsize):
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if volume is None:
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return None
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if isinstance(volume, int):
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return volume
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if isinstance(volume, float):
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return int(volume)
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if isinstance(volume, str):
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volume = volume.strip()
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if volume == '100%':
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return None
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minmax_parts = re.findall(r'(min|max)\((.+?), (.+?)\)', volume)
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if minmax_parts:
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(func, left, right) = minmax_parts[0]
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func = {'min': min, 'max': max}[func]
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left = _normalize_volume(left, pathsize=pathsize)
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right = _normalize_volume(right, pathsize=pathsize)
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return func(left, right)
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if volume.endswith('%'):
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volume = volume[:-1]
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volume = float(volume) / 100
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volume = (pathsize * volume) / bytestring.MIBIBYTE
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volume = max(1, volume)
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return int(volume)
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return int(volume)
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raise TypeError(f'Invalid volume {type(volume)}.')
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def normalize_volume(volume, pathsize):
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volume = _normalize_volume(volume, pathsize)
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if volume is not None and volume < 1:
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raise ValueError('Volume must be >= 1.')
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return volume
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def run_script(script, dry=False):
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'''
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`script` can be a list of strings, which are command line commands, or
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callable Python functions. They will be run in order, and the sequence
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will terminate if any step returns a bad status code. Your Python functions
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must return either 0 or None to be considered successful, all other return
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values will be considered failures.
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'''
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status = 0
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if dry:
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for command in script:
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print(command)
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return status
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for command in script:
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print(command)
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if isinstance(command, str):
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status = os.system(command)
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else:
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status = command()
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if status not in [0, None]:
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break
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return status
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def rarpar(
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path,
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*,
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basename=None,
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dry=False,
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moveto=None,
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par=None,
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password=None,
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recycle_original=False,
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rec=None,
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rev=None,
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volume=None,
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workdir='.',
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):
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path = pathclass.Path(path)
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path.assert_exists()
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if path.is_dir:
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input_pattern = path.absolute_path + '\\*'
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else:
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input_pattern = path.absolute_path
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workdir = pathclass.Path(workdir)
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workdir.assert_is_directory()
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if moveto:
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moveto = pathclass.Path(moveto)
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moveto.assert_is_directory()
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pathsize = path.size
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volume = normalize_volume(volume, pathsize)
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rec = _normalize_percentage(rec)
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rev = _normalize_percentage(rev)
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par = _normalize_percentage(par)
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if RESERVE_SPACE_ON_DRIVE:
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assert_enough_space(
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pathsize,
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workdir=workdir,
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moveto=moveto,
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rec=rec or 0,
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rev=rev or 0,
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par=par or 0,
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)
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timestamp = time.strftime('%Y-%m-%d')
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if not basename:
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basename = f'{path.basename} ({timestamp})'
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else:
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basename = basename.format(timestamp=timestamp)
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existing = winglob.glob(f'{basename}*.rar')
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if existing:
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raise Exception(f'{existing[0]} already exists.')
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#### ####
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script = []
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rarcommand = RARCOMMAND(
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basename=basename,
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input_pattern=input_pattern,
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password=password,
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rec=rec,
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rev=rev,
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volume=volume,
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workdir=workdir,
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)
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script.append(rarcommand)
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if par:
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parcommand = PARCOMMAND(
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basename=basename,
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par=par,
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workdir=workdir,
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)
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script.append(parcommand)
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def move_rars():
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move(f'{workdir.absolute_path}\\{basename}*.rar', f'{moveto.absolute_path}')
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def move_revs():
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move(f'{workdir.absolute_path}\\{basename}*.rev', f'{moveto.absolute_path}')
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def move_pars():
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move(f'{workdir.absolute_path}\\{basename}*.par2', f'{moveto.absolute_path}')
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if moveto:
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if True:
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script.append(move_rars)
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if rev:
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script.append(move_revs)
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if par:
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script.append(move_pars)
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def recycle():
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send2trash.send2trash(path.absolute_path)
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if recycle_original:
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script.append(recycle)
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#### ####
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status = run_script(script, dry)
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return status
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def rarpar_argparse(args):
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return rarpar(
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path=args.path,
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volume=args.volume,
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basename=args.basename,
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dry=args.dry,
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moveto=args.moveto,
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par=args.par,
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password=args.password,
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rec=args.rec,
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rev=args.rev,
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recycle_original=args.recycle_original,
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workdir=args.workdir,
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)
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DOCSTRING = '''
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path:
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The input file or directory to rarpar.
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--volume X | X% | min(A, B) | max(A, B)
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Split rars into volumes of this many megabytes. Should be
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An integer number of megabytes, or;
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A percentage "X%" to calculate volumes as X% of the file size, down to
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a 1 MB minimum, or;
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A string "min(A, B)" or "max(A, B)" where A and B follow the above rules.
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--rec X
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A integer to generate X% recovery record in the rars.
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See winrar documentation for information about recovery records.
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--rev X
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A integer to generate X% recovery volumes.
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Note that winrar's behavior is the number of revs will always be less than
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the number of rars. If you don't split volumes, you will have 1 rar and
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thus 0 revs even if you ask for 100% rev.
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See winrar documentation for information about recovery volumes.
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--par X
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A number to generate X% recovery with par2.
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--basename
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A basename for the rar and par files. You will end up with
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basename.partXX.rar and basename.par2.
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Without this argument, the default basename is "basename ({timestamp})".
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Your string may include {timestamp} including the braces to get the
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timestamp there.
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--password
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A password with which to encrypt the rar files.
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--workdir:
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The directory in which the rars and pars will be generated while the
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program is working.
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--moveto:
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The directory to which the rars and pars will be moved after the program
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has finished working.
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--recycle:
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The input file or directory will be recycled at the end.
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--dry:
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Print the commands that will be run, but don't actually run them.
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'''
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def main(argv):
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('path')
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parser.add_argument('--volume', dest='volume')
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parser.add_argument('--rec', dest='rec')
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parser.add_argument('--rev', dest='rev')
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parser.add_argument('--par', dest='par')
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parser.add_argument('--basename', dest='basename')
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parser.add_argument('--password', dest='password')
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parser.add_argument('--workdir', dest='workdir', default='.')
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parser.add_argument('--moveto', dest='moveto')
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parser.add_argument('--recycle', dest='recycle_original', action='store_true')
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parser.add_argument('--dry', dest='dry', action='store_true')
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parser.set_defaults(func=rarpar_argparse)
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return betterhelp.single_main(argv, parser, DOCSTRING)
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if __name__ == '__main__':
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raise SystemExit(main(sys.argv[1:]))
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