| """ |
| Autotest tempfile wrapper for mkstemp (known as tempfile here) and |
| mkdtemp (known as tempdir). |
| |
| This wrapper provides a mechanism to clean up temporary files/dirs once they |
| are no longer need. |
| |
| Files/Dirs will have a unique_id prepended to the suffix and a |
| _autotmp_ tag appended to the prefix. |
| |
| It is required that the unique_id param is supplied when a temp dir/file is |
| created. |
| """ |
| |
| import shutil, os, logging |
| import tempfile as module_tempfile |
| |
| _TEMPLATE = '_autotmp_' |
| |
| |
| class tempfile(object): |
| """ |
| A wrapper for tempfile.mkstemp |
| |
| @param unique_id: required, a unique string to help identify what |
| part of code created the tempfile. |
| @var name: The name of the temporary file. |
| @var fd: the file descriptor of the temporary file that was created. |
| @return a tempfile object |
| example usage: |
| t = autotemp.tempfile(unique_id='fig') |
| t.name # name of file |
| t.fd # file descriptor |
| t.fo # file object |
| t.clean() # clean up after yourself |
| """ |
| def __init__(self, unique_id, suffix='', prefix='', dir=None, |
| text=False): |
| suffix = unique_id + suffix |
| prefix = prefix + _TEMPLATE |
| self.fd, self.name = module_tempfile.mkstemp(suffix=suffix, |
| prefix=prefix, |
| dir=dir, text=text) |
| self.fo = os.fdopen(self.fd) |
| |
| |
| def clean(self): |
| """ |
| Remove the temporary file that was created. |
| This is also called by the destructor. |
| """ |
| if self.fo: |
| self.fo.close() |
| if self.name and os.path.exists(self.name): |
| os.remove(self.name) |
| |
| self.fd = self.fo = self.name = None |
| |
| |
| def __del__(self): |
| try: |
| if self.name is not None: |
| logging.debug('Cleaning %s', self.name) |
| self.clean() |
| except: |
| try: |
| msg = 'An exception occurred while calling the destructor' |
| logging.exception(msg) |
| except: |
| pass |
| |
| |
| class tempdir(object): |
| """ |
| A wrapper for tempfile.mkdtemp |
| |
| @var name: The name of the temporary dir. |
| @return A tempdir object |
| example usage: |
| b = autotemp.tempdir(unique_id='exemdir') |
| b.name # your directory |
| b.clean() # clean up after yourself |
| """ |
| def __init__(self, suffix='', unique_id='', prefix='', dir=None, |
| auto_clean=True): |
| """ |
| Initialize temp directory. |
| |
| @param suffix: suffix for dir. |
| @param prefix: prefix for dir. Defaults to '_autotmp'. |
| @param unique_id: unique id of tempdir. |
| @param dir: parent directory of the tempdir. Defaults to /tmp. |
| @param auto_clean: automatically clean up the tempdir in destructor. |
| |
| eg: autotemp.tempdir(suffix='suffix', unique_id='123', prefix='prefix') |
| creates a dir like '/tmp/prefix_autotmp_<random hash>123suffix' |
| """ |
| self.auto_clean = auto_clean |
| suffix = unique_id + suffix |
| prefix = prefix + _TEMPLATE |
| self.name = module_tempfile.mkdtemp(suffix=suffix, |
| prefix=prefix, dir=dir) |
| |
| |
| def clean(self): |
| """ |
| Remove the temporary dir that was created. |
| This is also called by the destructor. |
| """ |
| if self.name and os.path.exists(self.name): |
| shutil.rmtree(self.name) |
| |
| self.name = None |
| |
| |
| def __del__(self): |
| try: |
| if self.name and self.auto_clean: |
| logging.debug('Clean was not called for ' + self.name) |
| self.clean() |
| except: |
| try: |
| msg = 'An exception occurred while calling the destructor' |
| logging.exception(msg) |
| except: |
| pass |
| |
| |
| class dummy_dir(object): |
| """A dummy object representing a directory with a name. |
| |
| Only used for compat with the tmpdir, in cases where we wish to |
| reuse a dir with the same interface but not to delete it after |
| we're done using it. |
| """ |
| |
| def __init__(self, name): |
| """Initialize the dummy_dir object. |
| |
| @param name: Path the the directory. |
| """ |
| self.name = name |