diff options
Diffstat (limited to 'synapse')
| -rwxr-xr-x | synapse/app/homeserver.py | 5 | ||||
| -rw-r--r-- | synapse/config/cas.py | 4 | ||||
| -rw-r--r-- | synapse/rest/client/v1/login.py | 84 | ||||
| -rw-r--r-- | synapse/storage/__init__.py | 375 | ||||
| -rw-r--r-- | synapse/storage/engines/postgres.py | 2 | ||||
| -rw-r--r-- | synapse/storage/engines/sqlite3.py | 4 | ||||
| -rw-r--r-- | synapse/storage/schema/delta/24/fts.py | 2 | ||||
| -rw-r--r-- | synapse/storage/schema_prepare.py | 395 |
8 files changed, 463 insertions, 408 deletions
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py index 190b03e2f7..b284d07cf0 100755 --- a/synapse/app/homeserver.py +++ b/synapse/app/homeserver.py @@ -35,9 +35,8 @@ if __name__ == '__main__': from synapse.storage.engines import create_engine, IncorrectDatabaseSetup -from synapse.storage import ( - are_all_users_on_domain, UpgradeDatabaseException, -) +from synapse.storage import are_all_users_on_domain +from synapse.storage.schema_prepare import UpgradeDatabaseException from synapse.server import HomeServer diff --git a/synapse/config/cas.py b/synapse/config/cas.py index 81d034e8f0..d268680729 100644 --- a/synapse/config/cas.py +++ b/synapse/config/cas.py @@ -27,13 +27,17 @@ class CasConfig(Config): if cas_config: self.cas_enabled = True self.cas_server_url = cas_config["server_url"] + self.cas_required_attributes = cas_config.get("required_attributes", {}) else: self.cas_enabled = False self.cas_server_url = None + self.cas_required_attributes = {} def default_config(self, config_dir_path, server_name, **kwargs): return """ # Enable CAS for registration and login. #cas_config: # server_url: "https://cas-server.com" + # #required_attributes: + # # name: value """ diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py index a99dcaab6f..2e3e4f39f3 100644 --- a/synapse/rest/client/v1/login.py +++ b/synapse/rest/client/v1/login.py @@ -45,8 +45,8 @@ class LoginRestServlet(ClientV1RestServlet): self.idp_redirect_url = hs.config.saml2_idp_redirect_url self.saml2_enabled = hs.config.saml2_enabled self.cas_enabled = hs.config.cas_enabled - self.cas_server_url = hs.config.cas_server_url + self.cas_required_attributes = hs.config.cas_required_attributes self.servername = hs.config.server_name def on_GET(self, request): @@ -125,6 +125,47 @@ class LoginRestServlet(ClientV1RestServlet): @defer.inlineCallbacks def do_cas_login(self, cas_response_body): + user, attributes = self.parse_cas_response(cas_response_body) + + for required_attribute, required_value in self.cas_required_attributes.items(): + # If required attribute was not in CAS Response - Forbidden + if required_attribute not in attributes: + raise LoginError(401, "Unauthorized", errcode=Codes.UNAUTHORIZED) + + # Also need to check value + if required_value is not None: + actual_value = attributes[required_attribute] + # If required attribute value does not match expected - Forbidden + if required_value != actual_value: + raise LoginError(401, "Unauthorized", errcode=Codes.UNAUTHORIZED) + + user_id = UserID.create(user, self.hs.hostname).to_string() + auth_handler = self.handlers.auth_handler + user_exists = yield auth_handler.does_user_exist(user_id) + if user_exists: + user_id, access_token, refresh_token = ( + yield auth_handler.login_with_cas_user_id(user_id) + ) + result = { + "user_id": user_id, # may have changed + "access_token": access_token, + "refresh_token": refresh_token, + "home_server": self.hs.hostname, + } + + else: + user_id, access_token = ( + yield self.handlers.registration_handler.register(localpart=user) + ) + result = { + "user_id": user_id, # may have changed + "access_token": access_token, + "home_server": self.hs.hostname, + } + + defer.returnValue((200, result)) + + def parse_cas_response(self, cas_response_body): root = ET.fromstring(cas_response_body) if not root.tag.endswith("serviceResponse"): raise LoginError(401, "Invalid CAS response", errcode=Codes.UNAUTHORIZED) @@ -133,33 +174,22 @@ class LoginRestServlet(ClientV1RestServlet): for child in root[0]: if child.tag.endswith("user"): user = child.text - user_id = UserID.create(user, self.hs.hostname).to_string() - auth_handler = self.handlers.auth_handler - user_exists = yield auth_handler.does_user_exist(user_id) - if user_exists: - user_id, access_token, refresh_token = ( - yield auth_handler.login_with_cas_user_id(user_id) - ) - result = { - "user_id": user_id, # may have changed - "access_token": access_token, - "refresh_token": refresh_token, - "home_server": self.hs.hostname, - } - - else: - user_id, access_token = ( - yield self.handlers.registration_handler.register(localpart=user) - ) - result = { - "user_id": user_id, # may have changed - "access_token": access_token, - "home_server": self.hs.hostname, - } - - defer.returnValue((200, result)) + if child.tag.endswith("attributes"): + attributes = {} + for attribute in child: + # ElementTree library expands the namespace in attribute tags + # to the full URL of the namespace. + # See (https://docs.python.org/2/library/xml.etree.elementtree.html) + # We don't care about namespace here and it will always be encased in + # curly braces, so we remove them. + if "}" in attribute.tag: + attributes[attribute.tag.split("}")[1]] = attribute.text + else: + attributes[attribute.tag] = attribute.text + if user is None or attributes is None: + raise LoginError(401, "Invalid CAS response", errcode=Codes.UNAUTHORIZED) - raise LoginError(401, "Invalid CAS response", errcode=Codes.UNAUTHORIZED) + return (user, attributes) class LoginFallbackRestServlet(ClientV1RestServlet): diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py index 5f91ef77c0..a1bd9c4ce9 100644 --- a/synapse/storage/__init__.py +++ b/synapse/storage/__init__.py @@ -43,22 +43,12 @@ from .receipts import ReceiptsStore from .search import SearchStore -import fnmatch -import imp import logging -import os -import re logger = logging.getLogger(__name__) -# Remember to update this number every time a change is made to database -# schema files, so the users will be informed on server restarts. -SCHEMA_VERSION = 24 - -dir_path = os.path.abspath(os.path.dirname(__file__)) - # Number of msec of granularity to store the user IP 'last seen' time. Smaller # times give more inserts into the database even for readonly API hits # 120 seconds == 2 minutes @@ -160,371 +150,6 @@ class DataStore(RoomMemberStore, RoomStore, ) -def read_schema(path): - """ Read the named database schema. - - Args: - path: Path of the database schema. - Returns: - A string containing the database schema. - """ - with open(path) as schema_file: - return schema_file.read() - - -class PrepareDatabaseException(Exception): - pass - - -class UpgradeDatabaseException(PrepareDatabaseException): - pass - - -def prepare_database(db_conn, database_engine): - """Prepares a database for usage. Will either create all necessary tables - or upgrade from an older schema version. - """ - try: - cur = db_conn.cursor() - version_info = _get_or_create_schema_state(cur, database_engine) - - if version_info: - user_version, delta_files, upgraded = version_info - _upgrade_existing_database( - cur, user_version, delta_files, upgraded, database_engine - ) - else: - _setup_new_database(cur, database_engine) - - # cur.execute("PRAGMA user_version = %d" % (SCHEMA_VERSION,)) - - cur.close() - db_conn.commit() - except: - db_conn.rollback() - raise - - -def _setup_new_database(cur, database_engine): - """Sets up the database by finding a base set of "full schemas" and then - applying any necessary deltas. - - The "full_schemas" directory has subdirectories named after versions. This - function searches for the highest version less than or equal to - `SCHEMA_VERSION` and executes all .sql files in that directory. - - The function will then apply all deltas for all versions after the base - version. - - Example directory structure: - - schema/ - delta/ - ... - full_schemas/ - 3/ - test.sql - ... - 11/ - foo.sql - bar.sql - ... - - In the example foo.sql and bar.sql would be run, and then any delta files - for versions strictly greater than 11. - """ - current_dir = os.path.join(dir_path, "schema", "full_schemas") - directory_entries = os.listdir(current_dir) - - valid_dirs = [] - pattern = re.compile(r"^\d+(\.sql)?$") - for filename in directory_entries: - match = pattern.match(filename) - abs_path = os.path.join(current_dir, filename) - if match and os.path.isdir(abs_path): - ver = int(match.group(0)) - if ver <= SCHEMA_VERSION: - valid_dirs.append((ver, abs_path)) - else: - logger.warn("Unexpected entry in 'full_schemas': %s", filename) - - if not valid_dirs: - raise PrepareDatabaseException( - "Could not find a suitable base set of full schemas" - ) - - max_current_ver, sql_dir = max(valid_dirs, key=lambda x: x[0]) - - logger.debug("Initialising schema v%d", max_current_ver) - - directory_entries = os.listdir(sql_dir) - - for filename in fnmatch.filter(directory_entries, "*.sql"): - sql_loc = os.path.join(sql_dir, filename) - logger.debug("Applying schema %s", sql_loc) - executescript(cur, sql_loc) - - cur.execute( - database_engine.convert_param_style( - "INSERT INTO schema_version (version, upgraded)" - " VALUES (?,?)" - ), - (max_current_ver, False,) - ) - - _upgrade_existing_database( - cur, - current_version=max_current_ver, - applied_delta_files=[], - upgraded=False, - database_engine=database_engine, - ) - - -def _upgrade_existing_database(cur, current_version, applied_delta_files, - upgraded, database_engine): - """Upgrades an existing database. - - Delta files can either be SQL stored in *.sql files, or python modules - in *.py. - - There can be multiple delta files per version. Synapse will keep track of - which delta files have been applied, and will apply any that haven't been - even if there has been no version bump. This is useful for development - where orthogonal schema changes may happen on separate branches. - - Different delta files for the same version *must* be orthogonal and give - the same result when applied in any order. No guarantees are made on the - order of execution of these scripts. - - This is a no-op of current_version == SCHEMA_VERSION. - - Example directory structure: - - schema/ - delta/ - 11/ - foo.sql - ... - 12/ - foo.sql - bar.py - ... - full_schemas/ - ... - - In the example, if current_version is 11, then foo.sql will be run if and - only if `upgraded` is True. Then `foo.sql` and `bar.py` would be run in - some arbitrary order. - - Args: - cur (Cursor) - current_version (int): The current version of the schema. - applied_delta_files (list): A list of deltas that have already been - applied. - upgraded (bool): Whether the current version was generated by having - applied deltas or from full schema file. If `True` the function - will never apply delta files for the given `current_version`, since - the current_version wasn't generated by applying those delta files. - """ - - if current_version > SCHEMA_VERSION: - raise ValueError( - "Cannot use this database as it is too " + - "new for the server to understand" - ) - - start_ver = current_version - if not upgraded: - start_ver += 1 - - logger.debug("applied_delta_files: %s", applied_delta_files) - - for v in range(start_ver, SCHEMA_VERSION + 1): - logger.debug("Upgrading schema to v%d", v) - - delta_dir = os.path.join(dir_path, "schema", "delta", str(v)) - - try: - directory_entries = os.listdir(delta_dir) - except OSError: - logger.exception("Could not open delta dir for version %d", v) - raise UpgradeDatabaseException( - "Could not open delta dir for version %d" % (v,) - ) - - directory_entries.sort() - for file_name in directory_entries: - relative_path = os.path.join(str(v), file_name) - logger.debug("Found file: %s", relative_path) - if relative_path in applied_delta_files: - continue - - absolute_path = os.path.join( - dir_path, "schema", "delta", relative_path, - ) - root_name, ext = os.path.splitext(file_name) - if ext == ".py": - # This is a python upgrade module. We need to import into some - # package and then execute its `run_upgrade` function. - module_name = "synapse.storage.v%d_%s" % ( - v, root_name - ) - with open(absolute_path) as python_file: - module = imp.load_source( - module_name, absolute_path, python_file - ) - logger.debug("Running script %s", relative_path) - module.run_upgrade(cur, database_engine) - elif ext == ".pyc": - # Sometimes .pyc files turn up anyway even though we've - # disabled their generation; e.g. from distribution package - # installers. Silently skip it - pass - elif ext == ".sql": - # A plain old .sql file, just read and execute it - logger.debug("Applying schema %s", relative_path) - executescript(cur, absolute_path) - else: - # Not a valid delta file. - logger.warn( - "Found directory entry that did not end in .py or" - " .sql: %s", - relative_path, - ) - continue - - # Mark as done. - cur.execute( - database_engine.convert_param_style( - "INSERT INTO applied_schema_deltas (version, file)" - " VALUES (?,?)", - ), - (v, relative_path) - ) - - cur.execute("DELETE FROM schema_version") - cur.execute( - database_engine.convert_param_style( - "INSERT INTO schema_version (version, upgraded)" - " VALUES (?,?)", - ), - (v, True) - ) - - -def get_statements(f): - statement_buffer = "" - in_comment = False # If we're in a /* ... */ style comment - - for line in f: - line = line.strip() - - if in_comment: - # Check if this line contains an end to the comment - comments = line.split("*/", 1) - if len(comments) == 1: - continue - line = comments[1] - in_comment = False - - # Remove inline block comments - line = re.sub(r"/\*.*\*/", " ", line) - - # Does this line start a comment? - comments = line.split("/*", 1) - if len(comments) > 1: - line = comments[0] - in_comment = True - - # Deal with line comments - line = line.split("--", 1)[0] - line = line.split("//", 1)[0] - - # Find *all* semicolons. We need to treat first and last entry - # specially. - statements = line.split(";") - - # We must prepend statement_buffer to the first statement - first_statement = "%s %s" % ( - statement_buffer.strip(), - statements[0].strip() - ) - statements[0] = first_statement - - # Every entry, except the last, is a full statement - for statement in statements[:-1]: - yield statement.strip() - - # The last entry did *not* end in a semicolon, so we store it for the - # next semicolon we find - statement_buffer = statements[-1].strip() - - -def executescript(txn, schema_path): - with open(schema_path, 'r') as f: - for statement in get_statements(f): - txn.execute(statement) - - -def _get_or_create_schema_state(txn, database_engine): - # Bluntly try creating the schema_version tables. - schema_path = os.path.join( - dir_path, "schema", "schema_version.sql", - ) - executescript(txn, schema_path) - - txn.execute("SELECT version, upgraded FROM schema_version") - row = txn.fetchone() - current_version = int(row[0]) if row else None - upgraded = bool(row[1]) if row else None - - if current_version: - txn.execute( - database_engine.convert_param_style( - "SELECT file FROM applied_schema_deltas WHERE version >= ?" - ), - (current_version,) - ) - applied_deltas = [d for d, in txn.fetchall()] - return current_version, applied_deltas, upgraded - - return None - - -def prepare_sqlite3_database(db_conn): - """This function should be called before `prepare_database` on sqlite3 - databases. - - Since we changed the way we store the current schema version and handle - updates to schemas, we need a way to upgrade from the old method to the - new. This only affects sqlite databases since they were the only ones - supported at the time. - """ - with db_conn: - schema_path = os.path.join( - dir_path, "schema", "schema_version.sql", - ) - create_schema = read_schema(schema_path) - db_conn.executescript(create_schema) - - c = db_conn.execute("SELECT * FROM schema_version") - rows = c.fetchall() - c.close() - - if not rows: - c = db_conn.execute("PRAGMA user_version") - row = c.fetchone() - c.close() - - if row and row[0]: - db_conn.execute( - "REPLACE INTO schema_version (version, upgraded)" - " VALUES (?,?)", - (row[0], False) - ) - - def are_all_users_on_domain(txn, database_engine, domain): sql = database_engine.convert_param_style( "SELECT COUNT(*) FROM users WHERE name NOT LIKE ?" diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py index 4a855ffd56..7e45dabf4c 100644 --- a/synapse/storage/engines/postgres.py +++ b/synapse/storage/engines/postgres.py @@ -13,7 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. -from synapse.storage import prepare_database +from synapse.storage.schema_prepare import prepare_database from ._base import IncorrectDatabaseSetup diff --git a/synapse/storage/engines/sqlite3.py b/synapse/storage/engines/sqlite3.py index d18e2808d1..0eeaa45d19 100644 --- a/synapse/storage/engines/sqlite3.py +++ b/synapse/storage/engines/sqlite3.py @@ -13,7 +13,9 @@ # See the License for the specific language governing permissions and # limitations under the License. -from synapse.storage import prepare_database, prepare_sqlite3_database +from synapse.storage.schema_prepare import ( + prepare_database, prepare_sqlite3_database +) class Sqlite3Engine(object): diff --git a/synapse/storage/schema/delta/24/fts.py b/synapse/storage/schema/delta/24/fts.py index a806f4b8d3..f9b4bba4ed 100644 --- a/synapse/storage/schema/delta/24/fts.py +++ b/synapse/storage/schema/delta/24/fts.py @@ -14,7 +14,7 @@ import logging -from synapse.storage import get_statements +from synapse.storage.schema_prepare import get_statements from synapse.storage.engines import PostgresEngine, Sqlite3Engine import ujson diff --git a/synapse/storage/schema_prepare.py b/synapse/storage/schema_prepare.py new file mode 100644 index 0000000000..1ddf55be4d --- /dev/null +++ b/synapse/storage/schema_prepare.py @@ -0,0 +1,395 @@ +# -*- coding: utf-8 -*- +# Copyright 2014, 2015 OpenMarket Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +import fnmatch +import imp +import logging +import os +import re + + +logger = logging.getLogger(__name__) + + +# Remember to update this number every time a change is made to database +# schema files, so the users will be informed on server restarts. +SCHEMA_VERSION = 24 + +dir_path = os.path.abspath(os.path.dirname(__file__)) + + +def read_schema(path): + """ Read the named database schema. + + Args: + path: Path of the database schema. + Returns: + A string containing the database schema. + """ + with open(path) as schema_file: + return schema_file.read() + + +class PrepareDatabaseException(Exception): + pass + + +class UpgradeDatabaseException(PrepareDatabaseException): + pass + + +def prepare_database(db_conn, database_engine): + """Prepares a database for usage. Will either create all necessary tables + or upgrade from an older schema version. + """ + try: + cur = db_conn.cursor() + version_info = _get_or_create_schema_state(cur, database_engine) + + if version_info: + user_version, delta_files, upgraded = version_info + _upgrade_existing_database( + cur, user_version, delta_files, upgraded, database_engine + ) + else: + _setup_new_database(cur, database_engine) + + # cur.execute("PRAGMA user_version = %d" % (SCHEMA_VERSION,)) + + cur.close() + db_conn.commit() + except: + db_conn.rollback() + raise + + +def _setup_new_database(cur, database_engine): + """Sets up the database by finding a base set of "full schemas" and then + applying any necessary deltas. + + The "full_schemas" directory has subdirectories named after versions. This + function searches for the highest version less than or equal to + `SCHEMA_VERSION` and executes all .sql files in that directory. + + The function will then apply all deltas for all versions after the base + version. + + Example directory structure: + + schema/ + delta/ + ... + full_schemas/ + 3/ + test.sql + ... + 11/ + foo.sql + bar.sql + ... + + In the example foo.sql and bar.sql would be run, and then any delta files + for versions strictly greater than 11. + """ + current_dir = os.path.join(dir_path, "schema", "full_schemas") + directory_entries = os.listdir(current_dir) + + valid_dirs = [] + pattern = re.compile(r"^\d+(\.sql)?$") + for filename in directory_entries: + match = pattern.match(filename) + abs_path = os.path.join(current_dir, filename) + if match and os.path.isdir(abs_path): + ver = int(match.group(0)) + if ver <= SCHEMA_VERSION: + valid_dirs.append((ver, abs_path)) + else: + logger.warn("Unexpected entry in 'full_schemas': %s", filename) + + if not valid_dirs: + raise PrepareDatabaseException( + "Could not find a suitable base set of full schemas" + ) + + max_current_ver, sql_dir = max(valid_dirs, key=lambda x: x[0]) + + logger.debug("Initialising schema v%d", max_current_ver) + + directory_entries = os.listdir(sql_dir) + + for filename in fnmatch.filter(directory_entries, "*.sql"): + sql_loc = os.path.join(sql_dir, filename) + logger.debug("Applying schema %s", sql_loc) + executescript(cur, sql_loc) + + cur.execute( + database_engine.convert_param_style( + "INSERT INTO schema_version (version, upgraded)" + " VALUES (?,?)" + ), + (max_current_ver, False,) + ) + + _upgrade_existing_database( + cur, + current_version=max_current_ver, + applied_delta_files=[], + upgraded=False, + database_engine=database_engine, + ) + + +def _upgrade_existing_database(cur, current_version, applied_delta_files, + upgraded, database_engine): + """Upgrades an existing database. + + Delta files can either be SQL stored in *.sql files, or python modules + in *.py. + + There can be multiple delta files per version. Synapse will keep track of + which delta files have been applied, and will apply any that haven't been + even if there has been no version bump. This is useful for development + where orthogonal schema changes may happen on separate branches. + + Different delta files for the same version *must* be orthogonal and give + the same result when applied in any order. No guarantees are made on the + order of execution of these scripts. + + This is a no-op of current_version == SCHEMA_VERSION. + + Example directory structure: + + schema/ + delta/ + 11/ + foo.sql + ... + 12/ + foo.sql + bar.py + ... + full_schemas/ + ... + + In the example, if current_version is 11, then foo.sql will be run if and + only if `upgraded` is True. Then `foo.sql` and `bar.py` would be run in + some arbitrary order. + + Args: + cur (Cursor) + current_version (int): The current version of the schema. + applied_delta_files (list): A list of deltas that have already been + applied. + upgraded (bool): Whether the current version was generated by having + applied deltas or from full schema file. If `True` the function + will never apply delta files for the given `current_version`, since + the current_version wasn't generated by applying those delta files. + """ + + if current_version > SCHEMA_VERSION: + raise ValueError( + "Cannot use this database as it is too " + + "new for the server to understand" + ) + + start_ver = current_version + if not upgraded: + start_ver += 1 + + logger.debug("applied_delta_files: %s", applied_delta_files) + + for v in range(start_ver, SCHEMA_VERSION + 1): + logger.debug("Upgrading schema to v%d", v) + + delta_dir = os.path.join(dir_path, "schema", "delta", str(v)) + + try: + directory_entries = os.listdir(delta_dir) + except OSError: + logger.exception("Could not open delta dir for version %d", v) + raise UpgradeDatabaseException( + "Could not open delta dir for version %d" % (v,) + ) + + directory_entries.sort() + for file_name in directory_entries: + relative_path = os.path.join(str(v), file_name) + logger.debug("Found file: %s", relative_path) + if relative_path in applied_delta_files: + continue + + absolute_path = os.path.join( + dir_path, "schema", "delta", relative_path, + ) + root_name, ext = os.path.splitext(file_name) + if ext == ".py": + # This is a python upgrade module. We need to import into some + # package and then execute its `run_upgrade` function. + module_name = "synapse.storage.v%d_%s" % ( + v, root_name + ) + with open(absolute_path) as python_file: + module = imp.load_source( + module_name, absolute_path, python_file + ) + logger.debug("Running script %s", relative_path) + module.run_upgrade(cur, database_engine) + elif ext == ".pyc": + # Sometimes .pyc files turn up anyway even though we've + # disabled their generation; e.g. from distribution package + # installers. Silently skip it + pass + elif ext == ".sql": + # A plain old .sql file, just read and execute it + logger.debug("Applying schema %s", relative_path) + executescript(cur, absolute_path) + else: + # Not a valid delta file. + logger.warn( + "Found directory entry that did not end in .py or" + " .sql: %s", + relative_path, + ) + continue + + # Mark as done. + cur.execute( + database_engine.convert_param_style( + "INSERT INTO applied_schema_deltas (version, file)" + " VALUES (?,?)", + ), + (v, relative_path) + ) + + cur.execute("DELETE FROM schema_version") + cur.execute( + database_engine.convert_param_style( + "INSERT INTO schema_version (version, upgraded)" + " VALUES (?,?)", + ), + (v, True) + ) + + +def get_statements(f): + statement_buffer = "" + in_comment = False # If we're in a /* ... */ style comment + + for line in f: + line = line.strip() + + if in_comment: + # Check if this line contains an end to the comment + comments = line.split("*/", 1) + if len(comments) == 1: + continue + line = comments[1] + in_comment = False + + # Remove inline block comments + line = re.sub(r"/\*.*\*/", " ", line) + + # Does this line start a comment? + comments = line.split("/*", 1) + if len(comments) > 1: + line = comments[0] + in_comment = True + + # Deal with line comments + line = line.split("--", 1)[0] + line = line.split("//", 1)[0] + + # Find *all* semicolons. We need to treat first and last entry + # specially. + statements = line.split(";") + + # We must prepend statement_buffer to the first statement + first_statement = "%s %s" % ( + statement_buffer.strip(), + statements[0].strip() + ) + statements[0] = first_statement + + # Every entry, except the last, is a full statement + for statement in statements[:-1]: + yield statement.strip() + + # The last entry did *not* end in a semicolon, so we store it for the + # next semicolon we find + statement_buffer = statements[-1].strip() + + +def executescript(txn, schema_path): + with open(schema_path, 'r') as f: + for statement in get_statements(f): + txn.execute(statement) + + +def _get_or_create_schema_state(txn, database_engine): + # Bluntly try creating the schema_version tables. + schema_path = os.path.join( + dir_path, "schema", "schema_version.sql", + ) + executescript(txn, schema_path) + + txn.execute("SELECT version, upgraded FROM schema_version") + row = txn.fetchone() + current_version = int(row[0]) if row else None + upgraded = bool(row[1]) if row else None + + if current_version: + txn.execute( + database_engine.convert_param_style( + "SELECT file FROM applied_schema_deltas WHERE version >= ?" + ), + (current_version,) + ) + applied_deltas = [d for d, in txn.fetchall()] + return current_version, applied_deltas, upgraded + + return None + + +def prepare_sqlite3_database(db_conn): + """This function should be called before `prepare_database` on sqlite3 + databases. + + Since we changed the way we store the current schema version and handle + updates to schemas, we need a way to upgrade from the old method to the + new. This only affects sqlite databases since they were the only ones + supported at the time. + """ + with db_conn: + schema_path = os.path.join( + dir_path, "schema", "schema_version.sql", + ) + create_schema = read_schema(schema_path) + db_conn.executescript(create_schema) + + c = db_conn.execute("SELECT * FROM schema_version") + rows = c.fetchall() + c.close() + + if not rows: + c = db_conn.execute("PRAGMA user_version") + row = c.fetchone() + c.close() + + if row and row[0]: + db_conn.execute( + "REPLACE INTO schema_version (version, upgraded)" + " VALUES (?,?)", + (row[0], False) + ) |