178 lines
5.2 KiB
Plaintext
Executable file
178 lines
5.2 KiB
Plaintext
Executable file
#!/usr/bin/env nix-shell
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#! nix-shell -i python3 --pure
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#! nix-shell -p python3 python3Packages.coloredlogs python3Packages.magic unzip p7zip unrar gnutar gzip
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import logging
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import os
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import subprocess
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import sys
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import typing
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import coloredlogs
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import magic
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# TODO Able to ignore extensions everywhere
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class ArchiveType:
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suffix: str = ""
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fullname: str = ""
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dest_suffix: str = ""
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mime: typing.Optional[str] = None
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header: typing.Optional[bytes] = None
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extract_cmd: typing.Optional[typing.List[str]] = None
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single_file = False
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append_dest = False
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def __init__(self) -> None:
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self.log = logging.getLogger(self.__class__.__name__)
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def dest_name(self, archive: str) -> str:
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return archive + self.dest_suffix
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def fits(self, name_lower: str, mime: str, header: bytes) -> bool:
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if not name_lower.endswith(self.suffix):
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return False
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if self.mime is not None and mime != self.mime:
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return False
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if self.header is not None and not header.startswith(self.header):
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return False
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return True
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def _get_cmd(self, archive: str, dest: str) -> typing.List[str]:
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assert self.extract_cmd
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cmd = self.extract_cmd + [archive]
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if self.append_dest:
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cmd.append(dest)
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return cmd
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def extract(self, archive: str, dest: str) -> None:
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cmd = self._get_cmd(archive, dest)
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if not self.single_file:
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os.mkdir(dest)
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self.log.info("Extracting '%s' into '%s'", archive, dest)
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self.log.debug("%s", cmd)
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if self.single_file:
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r = subprocess.run(cmd)
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else:
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r = subprocess.run(cmd, cwd=dest)
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r.check_returncode()
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if self.single_file:
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assert os.path.isfile(dest)
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extract_fun: typing.Optional[typing.Callable[[str, str], None]] = None
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class ArchiveZip(ArchiveType):
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suffix = ".zip"
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mime = "application/zip"
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extract_cmd = ["unzip"]
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class Archive7z(ArchiveType):
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suffix = ".7z"
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mime = "application/x-7z-compressed"
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extract_cmd = ["7z", "x"]
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class ArchiveRar(ArchiveType):
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suffix = ".rar"
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mime = "application/x-rar"
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extract_cmd = ["unrar", "x"]
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class ArchiveTar(ArchiveType):
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suffix = ".tar"
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mime = "application/x-tar"
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extract_cmd = ["tar", "--extract", "--file"]
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class ArchiveTarGz(ArchiveType):
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suffix = ".tar.gz"
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mime = "application/gzip"
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extract_cmd = ["tar", "--extract", "--gzip", "--file"]
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class ArchiveTarXz(ArchiveType):
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suffix = ".tar.xz"
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mime = "application/x-xz"
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extract_cmd = ["tar", "--extract", "--xz", "--file"]
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class ArchiveGzip(ArchiveType):
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suffix = ".gz"
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mime = "application/gzip"
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single_file = True
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extract_cmd = ["gunzip"]
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class TreeExtractor:
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ARCHIVE_TYPES: typing.List[ArchiveType] = [
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ArchiveZip(),
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Archive7z(),
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ArchiveRar(),
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ArchiveTar(),
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ArchiveTarGz(),
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ArchiveTarXz(),
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ArchiveGzip(),
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]
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def __init__(self) -> None:
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self.log = logging.getLogger("TreeExtractor")
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self.suffixes = set()
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for archive_type in self.ARCHIVE_TYPES:
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self.suffixes.add(archive_type.suffix)
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def extract_tree(self, directory: str = ".") -> None:
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for root, dirs, files in os.walk(directory):
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real_root = os.path.realpath(root)
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for name in files:
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self.log.debug("Handling '%s' '%s'", real_root, name)
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# Initial filtering with suffix
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name_lower = name.lower()
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for suffix in self.suffixes:
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if name_lower.endswith(suffix):
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break
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else:
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self.log.debug("Suffix not matched: %s", name)
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continue
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filepath = os.path.join(real_root, name)
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with open(filepath, "rb") as filedesc:
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header = filedesc.read(1024)
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mime = magic.detect_from_content(header).mime_type
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archive_type = None
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for archtyp in self.ARCHIVE_TYPES:
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if archtyp.fits(name_lower, mime, header):
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archive_type = archtyp
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break
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if not archive_type:
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self.log.debug("Not matched: %s", filepath)
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continue
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dest_name = archive_type.dest_name(name)
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dest = os.path.join(real_root, dest_name)
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dest_tmp = dest + ".tmp"
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try:
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archive_type.extract(filepath, dest_tmp)
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except BaseException as e:
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# TODO Parameters stop on error
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self.log.error(e, exc_info=True)
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else:
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os.unlink(filepath)
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os.rename(dest_tmp, dest)
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if os.path.isdir(dest):
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self.extract_tree(dest)
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def main(self) -> None:
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directory = sys.argv[1] if len(sys.argv) > 1 else "."
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self.extract_tree(directory)
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if __name__ == "__main__":
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coloredlogs.install(level="DEBUG", fmt="%(levelname)s %(message)s")
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TreeExtractor().main()
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