# encoding: utf-8 """An object for managing IPython profile directories.""" # Copyright (c) IPython Development Team. # Distributed under the terms of the Modified BSD License. import os import shutil import errno from traitlets.config.configurable import LoggingConfigurable from IPython.paths import get_ipython_package_dir from IPython.utils.path import expand_path, ensure_dir_exists from IPython.utils import py3compat from traitlets import Unicode, Bool, observe #----------------------------------------------------------------------------- # Module errors #----------------------------------------------------------------------------- class ProfileDirError(Exception): pass #----------------------------------------------------------------------------- # Class for managing profile directories #----------------------------------------------------------------------------- class ProfileDir(LoggingConfigurable): """An object to manage the profile directory and its resources. The profile directory is used by all IPython applications, to manage configuration, logging and security. This object knows how to find, create and manage these directories. This should be used by any code that wants to handle profiles. """ security_dir_name = Unicode('security') log_dir_name = Unicode('log') startup_dir_name = Unicode('startup') pid_dir_name = Unicode('pid') static_dir_name = Unicode('static') security_dir = Unicode(u'') log_dir = Unicode(u'') startup_dir = Unicode(u'') pid_dir = Unicode(u'') static_dir = Unicode(u'') location = Unicode(u'', help="""Set the profile location directly. This overrides the logic used by the `profile` option.""", ).tag(config=True) _location_isset = Bool(False) # flag for detecting multiply set location @observe('location') def _location_changed(self, change): if self._location_isset: raise RuntimeError("Cannot set profile location more than once.") self._location_isset = True new = change['new'] ensure_dir_exists(new) # ensure config files exist: self.security_dir = os.path.join(new, self.security_dir_name) self.log_dir = os.path.join(new, self.log_dir_name) self.startup_dir = os.path.join(new, self.startup_dir_name) self.pid_dir = os.path.join(new, self.pid_dir_name) self.static_dir = os.path.join(new, self.static_dir_name) self.check_dirs() def _mkdir(self, path, mode=None): """ensure a directory exists at a given path This is a version of os.mkdir, with the following differences: - returns True if it created the directory, False otherwise - ignores EEXIST, protecting against race conditions where the dir may have been created in between the check and the creation - sets permissions if requested and the dir already exists """ if os.path.exists(path): if mode and os.stat(path).st_mode != mode: try: os.chmod(path, mode) except OSError: self.log.warning( "Could not set permissions on %s", path ) return False try: if mode: os.mkdir(path, mode) else: os.mkdir(path) except OSError as e: if e.errno == errno.EEXIST: return False else: raise return True @observe('log_dir') def check_log_dir(self, change=None): self._mkdir(self.log_dir) @observe('startup_dir') def check_startup_dir(self, change=None): self._mkdir(self.startup_dir) readme = os.path.join(self.startup_dir, 'README') if not os.path.exists(readme): import pkgutil with open(readme, 'wb') as f: f.write(pkgutil.get_data(__name__, 'profile/README_STARTUP')) @observe('security_dir') def check_security_dir(self, change=None): self._mkdir(self.security_dir, 0o40700) @observe('pid_dir') def check_pid_dir(self, change=None): self._mkdir(self.pid_dir, 0o40700) def check_dirs(self): self.check_security_dir() self.check_log_dir() self.check_pid_dir() self.check_startup_dir() def copy_config_file(self, config_file, path=None, overwrite=False): """Copy a default config file into the active profile directory. Default configuration files are kept in :mod:`IPython.core.profile`. This function moves these from that location to the working profile directory. """ dst = os.path.join(self.location, config_file) if os.path.isfile(dst) and not overwrite: return False if path is None: path = os.path.join(get_ipython_package_dir(), u'core', u'profile', u'default') src = os.path.join(path, config_file) shutil.copy(src, dst) return True @classmethod def create_profile_dir(cls, profile_dir, config=None): """Create a new profile directory given a full path. Parameters ---------- profile_dir : str The full path to the profile directory. If it does exist, it will be used. If not, it will be created. """ return cls(location=profile_dir, config=config) @classmethod def create_profile_dir_by_name(cls, path, name=u'default', config=None): """Create a profile dir by profile name and path. Parameters ---------- path : unicode The path (directory) to put the profile directory in. name : unicode The name of the profile. The name of the profile directory will be "profile_". """ if not os.path.isdir(path): raise ProfileDirError('Directory not found: %s' % path) profile_dir = os.path.join(path, u'profile_' + name) return cls(location=profile_dir, config=config) @classmethod def find_profile_dir_by_name(cls, ipython_dir, name=u'default', config=None): """Find an existing profile dir by profile name, return its ProfileDir. This searches through a sequence of paths for a profile dir. If it is not found, a :class:`ProfileDirError` exception will be raised. The search path algorithm is: 1. ``py3compat.getcwd()`` 2. ``ipython_dir`` Parameters ---------- ipython_dir : unicode or str The IPython directory to use. name : unicode or str The name of the profile. The name of the profile directory will be "profile_". """ dirname = u'profile_' + name paths = [py3compat.getcwd(), ipython_dir] for p in paths: profile_dir = os.path.join(p, dirname) if os.path.isdir(profile_dir): return cls(location=profile_dir, config=config) else: raise ProfileDirError('Profile directory not found in paths: %s' % dirname) @classmethod def find_profile_dir(cls, profile_dir, config=None): """Find/create a profile dir and return its ProfileDir. This will create the profile directory if it doesn't exist. Parameters ---------- profile_dir : unicode or str The path of the profile directory. """ profile_dir = expand_path(profile_dir) if not os.path.isdir(profile_dir): raise ProfileDirError('Profile directory not found: %s' % profile_dir) return cls(location=profile_dir, config=config)