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Don't loop # for 5 minutes like charmhelpers because we expect the human to notice and # resolve to apt conflict or try again. # Hope for an optimal first try. APT_RETRIES = [1.0, 5.0, 10.0] def assert_valid_apt_credentials(repo_url, username, password): """Validate apt credentials for a PPA. @param repo_url: private-ppa url path @param username: PPA login username. @param password: PPA login password or resource token. @raises: UserFacingError for invalid credentials, timeout or unexpected errors. """ protocol, repo_path = repo_url.split("://") if not os.path.exists("/usr/lib/apt/apt-helper"): return try: with tempfile.TemporaryDirectory() as tmpd: util.subp( [ "/usr/lib/apt/apt-helper", "download-file", "{}://{}:{}@{}/ubuntu/pool/".format( protocol, username, password, repo_path ), os.path.join(tmpd, "apt-helper-output"), ], timeout=APT_HELPER_TIMEOUT, ) except util.ProcessExecutionError as e: if e.exit_code == 100: stderr = str(e.stderr).lower() if re.search(r"401\s+unauthorized|httperror401", stderr): raise exceptions.UserFacingError( "Invalid APT credentials provided for {}".format(repo_url) ) elif re.search(r"connection timed out", stderr): raise exceptions.UserFacingError( "Timeout trying to access APT repository at {}".format( repo_url ) ) raise exceptions.UserFacingError( "Unexpected APT error. See /var/log/ubuntu-advantage.log" ) except subprocess.TimeoutExpired: raise exceptions.UserFacingError( "Cannot validate credentials for APT repo." " Timeout after {} seconds trying to reach {}.".format( APT_HELPER_TIMEOUT, repo_path ) ) def run_apt_command(cmd, error_msg) -> str: """Run an apt command, retrying upon failure APT_RETRIES times. :return: stdout from successful run of the apt command. :raise UserFacingError: on issues running apt-cache policy. """ try: out, _err = util.subp(cmd, capture=True, retry_sleeps=APT_RETRIES) except util.ProcessExecutionError as e: if "Could not get lock /var/lib/dpkg/lock" in str(e.stderr): error_msg += " Another process is running APT." raise exceptions.UserFacingError(error_msg) return out def add_auth_apt_repo( repo_filename: str, repo_url: str, credentials: str, suites: "List[str]", keyring_file: str, ) -> None: """Add an authenticated apt repo and credentials to the system. @raises: InvalidAPTCredentialsError when the token provided can't access the repo PPA. """ try: username, password = credentials.split(":") except ValueError: # Then we have a bearer token username = "bearer" password = credentials series = util.get_platform_info()["series"] if repo_url.endswith("/"): repo_url = repo_url[:-1] assert_valid_apt_credentials(repo_url, username, password) # Does this system have updates suite enabled? updates_enabled = False policy = run_apt_command( ["apt-cache", "policy"], status.MESSAGE_APT_POLICY_FAILED ) for line in policy.splitlines(): # We only care about $suite-updates lines if "a={}-updates".format(series) not in line: continue # We only care about $suite-updates from the Ubuntu archive if "o=Ubuntu," not in line: continue updates_enabled = True break content = "" for suite in suites: if series not in suite: continue # Only enable suites matching this current series maybe_comment = "" if "-updates" in suite and not updates_enabled: logging.debug( 'Not enabling apt suite "%s" because "%s-updates" is not' " enabled", suite, series, ) maybe_comment = "# " content += ( "{maybe_comment}deb {url}/ubuntu {suite} main\n" "# deb-src {url}/ubuntu {suite} main\n".format( maybe_comment=maybe_comment, url=repo_url, suite=suite ) ) util.write_file(repo_filename, content) add_apt_auth_conf_entry(repo_url, username, password) source_keyring_file = os.path.join(KEYRINGS_DIR, keyring_file) destination_keyring_file = os.path.join(APT_KEYS_DIR, keyring_file) gpg.export_gpg_key(source_keyring_file, destination_keyring_file) def add_apt_auth_conf_entry(repo_url, login, password): """Add or replace an apt auth line in apt's auth.conf file or conf.d.""" apt_auth_file = get_apt_auth_file_from_apt_config() _protocol, repo_path = repo_url.split("://") if repo_path.endswith("/"): # strip trailing slash repo_path = repo_path[:-1] if os.path.exists(apt_auth_file): orig_content = util.load_file(apt_auth_file) else: orig_content = "" repo_auth_line = ( "machine {repo_path}/ login {login} password {password}" "{cmt}".format( repo_path=repo_path, login=login, password=password, cmt=APT_AUTH_COMMENT, ) ) added_new_auth = False new_lines = [] for line in orig_content.splitlines(): machine_match = re.match(r"machine\s+(?P[.\-\w]+)/?.*", line) if machine_match: matched_repo = machine_match.group("repo_url") if matched_repo == repo_path: # Replace old auth with new auth at same line new_lines.append(repo_auth_line) added_new_auth = True continue if matched_repo in repo_path: # Insert our repo before. We are a more specific apt repo match new_lines.append(repo_auth_line) added_new_auth = True new_lines.append(line) if not added_new_auth: new_lines.append(repo_auth_line) new_lines.append("") util.write_file(apt_auth_file, "\n".join(new_lines), mode=0o600) def remove_repo_from_apt_auth_file(repo_url): """Remove a repo from the shared apt auth file""" _protocol, repo_path = repo_url.split("://") if repo_path.endswith("/"): # strip trailing slash repo_path = repo_path[:-1] apt_auth_file = get_apt_auth_file_from_apt_config() if os.path.exists(apt_auth_file): apt_auth = util.load_file(apt_auth_file) auth_prefix = "machine {repo_path}/ login".format(repo_path=repo_path) content = "\n".join( [line for line in apt_auth.splitlines() if auth_prefix not in line] ) if not content: os.unlink(apt_auth_file) else: util.write_file(apt_auth_file, content, mode=0o600) def remove_auth_apt_repo( repo_filename: str, repo_url: str, keyring_file: str = None ) -> None: """Remove an authenticated apt repo and credentials to the system""" util.del_file(repo_filename) if keyring_file: keyring_file = os.path.join(APT_KEYS_DIR, keyring_file) util.del_file(keyring_file) remove_repo_from_apt_auth_file(repo_url) def restore_commented_apt_list_file(filename: str) -> None: """Uncomment commented deb lines in the given file.""" file_content = util.load_file(filename) file_content = file_content.replace("# deb ", "deb ") util.write_file(filename, file_content) def add_ppa_pinning(apt_preference_file, repo_url, origin, priority): """Add an apt preferences file and pin for a PPA.""" series = util.get_platform_info()["series"] _protocol, repo_path = repo_url.split("://") if repo_path.endswith("/"): # strip trailing slash repo_path = repo_path[:-1] content = ( "Package: *\n" "Pin: release o={origin}, n={series}\n" "Pin-Priority: {priority}\n".format( origin=origin, priority=priority, series=series ) ) util.write_file(apt_preference_file, content) def get_apt_auth_file_from_apt_config(): """Return to patch to the system configured APT auth file.""" out, _err = util.subp( ["apt-config", "shell", "key", APT_CONFIG_AUTH_PARTS_DIR] ) if out: # then auth.conf.d parts is present return out.split("'")[1] + "90ubuntu-advantage" else: # then use configured /etc/apt/auth.conf out, _err = util.subp( ["apt-config", "shell", "key", APT_CONFIG_AUTH_FILE] ) return out.split("'")[1].rstrip("/") def find_apt_list_files(repo_url, series): """List any apt files in APT_CONFIG_LISTS_DIR given repo_url and series.""" _protocol, repo_path = repo_url.split("://") if repo_path.endswith("/"): # strip trailing slash repo_path = repo_path[:-1] lists_dir = "/var/lib/apt/lists" out, _err = util.subp(["apt-config", "shell", "key", APT_CONFIG_LISTS_DIR]) if out: # then lists dir is present in config lists_dir = out.split("'")[1] aptlist_filename = repo_path.replace("/", "_") return sorted( glob.glob( os.path.join( lists_dir, aptlist_filename + "_dists_{}*".format(series) ) ) ) def remove_apt_list_files(repo_url, series): """Remove any apt list files present for this repo_url and series.""" for path in find_apt_list_files(repo_url, series): if os.path.exists(path): os.unlink(path) def clean_apt_sources(*, _entitlements=None): """ Clean apt sources list files written by uaclient :param _entitlements: The uaclient.entitlements module to use, defaults to uaclient.entitlements. (This is only present for testing, because the import happens within the function to avoid circular imports.) """ if _entitlements is None: from uaclient import entitlements as _entitlements for ent_cls in _entitlements.ENTITLEMENT_CLASSES: if not hasattr(ent_cls, "repo_url"): continue repo_list_glob = ent_cls.repo_list_file_tmpl.format( name=ent_cls.name, series="*" ) # Remove list files for path in glob.glob(repo_list_glob): logging.info("Removing apt source file: %s", path) os.unlink(path) def get_installed_packages() -> "List[str]": out, _ = util.subp(["dpkg-query", "-W", "--showformat=${Package}\\n"]) return out.splitlines()