diff options
Diffstat (limited to 'lib/python2.7/site-packages/pip/req/req_uninstall.py')
| -rw-r--r-- | lib/python2.7/site-packages/pip/req/req_uninstall.py | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lib/python2.7/site-packages/pip/req/req_uninstall.py b/lib/python2.7/site-packages/pip/req/req_uninstall.py new file mode 100644 index 0000000..5248430 --- /dev/null +++ b/lib/python2.7/site-packages/pip/req/req_uninstall.py @@ -0,0 +1,195 @@ +from __future__ import absolute_import + +import logging +import os +import tempfile + +from pip.compat import uses_pycache, WINDOWS, cache_from_source +from pip.exceptions import UninstallationError +from pip.utils import rmtree, ask, is_local, renames, normalize_path +from pip.utils.logging import indent_log + + +logger = logging.getLogger(__name__) + + +class UninstallPathSet(object): + """A set of file paths to be removed in the uninstallation of a + requirement.""" + def __init__(self, dist): + self.paths = set() + self._refuse = set() + self.pth = {} + self.dist = dist + self.save_dir = None + self._moved_paths = [] + + def _permitted(self, path): + """ + Return True if the given path is one we are permitted to + remove/modify, False otherwise. + + """ + return is_local(path) + + def add(self, path): + head, tail = os.path.split(path) + + # we normalize the head to resolve parent directory symlinks, but not + # the tail, since we only want to uninstall symlinks, not their targets + path = os.path.join(normalize_path(head), os.path.normcase(tail)) + + if not os.path.exists(path): + return + if self._permitted(path): + self.paths.add(path) + else: + self._refuse.add(path) + + # __pycache__ files can show up after 'installed-files.txt' is created, + # due to imports + if os.path.splitext(path)[1] == '.py' and uses_pycache: + self.add(cache_from_source(path)) + + def add_pth(self, pth_file, entry): + pth_file = normalize_path(pth_file) + if self._permitted(pth_file): + if pth_file not in self.pth: + self.pth[pth_file] = UninstallPthEntries(pth_file) + self.pth[pth_file].add(entry) + else: + self._refuse.add(pth_file) + + def compact(self, paths): + """Compact a path set to contain the minimal number of paths + necessary to contain all paths in the set. If /a/path/ and + /a/path/to/a/file.txt are both in the set, leave only the + shorter path.""" + short_paths = set() + for path in sorted(paths, key=len): + if not any([ + (path.startswith(shortpath) and + path[len(shortpath.rstrip(os.path.sep))] == os.path.sep) + for shortpath in short_paths]): + short_paths.add(path) + return short_paths + + def _stash(self, path): + return os.path.join( + self.save_dir, os.path.splitdrive(path)[1].lstrip(os.path.sep)) + + def remove(self, auto_confirm=False): + """Remove paths in ``self.paths`` with confirmation (unless + ``auto_confirm`` is True).""" + if not self.paths: + logger.info( + "Can't uninstall '%s'. No files were found to uninstall.", + self.dist.project_name, + ) + return + logger.info( + 'Uninstalling %s-%s:', + self.dist.project_name, self.dist.version + ) + + with indent_log(): + paths = sorted(self.compact(self.paths)) + + if auto_confirm: + response = 'y' + else: + for path in paths: + logger.info(path) + response = ask('Proceed (y/n)? ', ('y', 'n')) + if self._refuse: + logger.info('Not removing or modifying (outside of prefix):') + for path in self.compact(self._refuse): + logger.info(path) + if response == 'y': + self.save_dir = tempfile.mkdtemp(suffix='-uninstall', + prefix='pip-') + for path in paths: + new_path = self._stash(path) + logger.debug('Removing file or directory %s', path) + self._moved_paths.append(path) + renames(path, new_path) + for pth in self.pth.values(): + pth.remove() + logger.info( + 'Successfully uninstalled %s-%s', + self.dist.project_name, self.dist.version + ) + + def rollback(self): + """Rollback the changes previously made by remove().""" + if self.save_dir is None: + logger.error( + "Can't roll back %s; was not uninstalled", + self.dist.project_name, + ) + return False + logger.info('Rolling back uninstall of %s', self.dist.project_name) + for path in self._moved_paths: + tmp_path = self._stash(path) + logger.debug('Replacing %s', path) + renames(tmp_path, path) + for pth in self.pth.values(): + pth.rollback() + + def commit(self): + """Remove temporary save dir: rollback will no longer be possible.""" + if self.save_dir is not None: + rmtree(self.save_dir) + self.save_dir = None + self._moved_paths = [] + + +class UninstallPthEntries(object): + def __init__(self, pth_file): + if not os.path.isfile(pth_file): + raise UninstallationError( + "Cannot remove entries from nonexistent file %s" % pth_file + ) + self.file = pth_file + self.entries = set() + self._saved_lines = None + + def add(self, entry): + entry = os.path.normcase(entry) + # On Windows, os.path.normcase converts the entry to use + # backslashes. This is correct for entries that describe absolute + # paths outside of site-packages, but all the others use forward + # slashes. + if WINDOWS and not os.path.splitdrive(entry)[0]: + entry = entry.replace('\\', '/') + self.entries.add(entry) + + def remove(self): + logger.debug('Removing pth entries from %s:', self.file) + with open(self.file, 'rb') as fh: + # windows uses '\r\n' with py3k, but uses '\n' with py2.x + lines = fh.readlines() + self._saved_lines = lines + if any(b'\r\n' in line for line in lines): + endline = '\r\n' + else: + endline = '\n' + for entry in self.entries: + try: + logger.debug('Removing entry: %s', entry) + lines.remove((entry + endline).encode("utf-8")) + except ValueError: + pass + with open(self.file, 'wb') as fh: + fh.writelines(lines) + + def rollback(self): + if self._saved_lines is None: + logger.error( + 'Cannot roll back changes to %s, none were made', self.file + ) + return False + logger.debug('Rolling %s back to previous state', self.file) + with open(self.file, 'wb') as fh: + fh.writelines(self._saved_lines) + return True |