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1
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""" |
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2
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Operating system functions. |
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3
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""" |
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4
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__all__ = [ |
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5
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'abspath', |
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6
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'pushd_popd', |
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7
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'unzip_file_to_dir', |
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8
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'atomic_write', |
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9
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] |
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10
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11
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from atomicwrites import atomic_write as atomic_write_, AtomicWriter |
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12
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from tempfile import TemporaryDirectory |
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13
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import contextlib |
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14
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from os import getcwd, chdir, stat, fchmod, umask |
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15
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from os.path import exists, abspath as abspath_ |
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16
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17
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from zipfile import ZipFile |
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18
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19
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def abspath(url): |
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20
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""" |
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21
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Get a full path to a file or file URL |
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22
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23
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See os.abspath |
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24
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""" |
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25
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if url.startswith('file://'): |
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26
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url = url[len('file://'):] |
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27
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return abspath_(url) |
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28
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29
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@contextlib.contextmanager |
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30
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def pushd_popd(newcwd=None, tempdir=False): |
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31
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if newcwd and tempdir: |
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32
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raise Exception("pushd_popd can accept either newcwd or tempdir, not both") |
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33
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try: |
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34
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oldcwd = getcwd() |
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35
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except FileNotFoundError as e: # pylint: disable=unused-variable |
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36
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# This happens when a directory is deleted before the context is exited |
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37
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oldcwd = '/tmp' |
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38
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try: |
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39
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if tempdir: |
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40
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with TemporaryDirectory() as tempcwd: |
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41
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chdir(tempcwd) |
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42
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yield tempcwd |
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43
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else: |
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44
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if newcwd: |
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45
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chdir(newcwd) |
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46
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yield newcwd |
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47
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finally: |
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48
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chdir(oldcwd) |
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49
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50
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def unzip_file_to_dir(path_to_zip, output_directory): |
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51
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""" |
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52
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Extract a ZIP archive to a directory |
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53
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""" |
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54
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z = ZipFile(path_to_zip, 'r') |
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55
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z.extractall(output_directory) |
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56
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z.close() |
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57
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58
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59
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60
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# ht @pabs3 |
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61
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# https://github.com/untitaker/python-atomicwrites/issues/42 |
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62
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class AtomicWriterPerms(AtomicWriter): |
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63
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def get_fileobject(self, **kwargs): |
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64
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f = super().get_fileobject(**kwargs) |
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65
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try: |
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66
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mode = stat(self._path).st_mode |
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67
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except FileNotFoundError: |
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68
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# Creating a new file, emulate what os.open() does |
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69
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mask = umask(0) |
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70
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umask(mask) |
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71
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mode = 0o664 & ~mask |
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72
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fd = f.fileno() |
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73
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fchmod(fd, mode) |
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74
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return f |
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75
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76
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@contextlib.contextmanager |
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77
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def atomic_write(fpath): |
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78
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with atomic_write_(fpath, writer_cls=AtomicWriterPerms, overwrite=True) as f: |
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79
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yield f |
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80
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OCR-D /
core
