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synapse/scripts-dev/check_schema_delta.py

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#!/usr/bin/env python3
# Check that no schema deltas have been added to the wrong version.
import re
from typing import Any, Dict, List
import click
import git
SCHEMA_FILE_REGEX = re.compile(r"^synapse/storage/schema/(.*)/delta/(.*)/(.*)$")
@click.command()
@click.option(
"--force-colors",
is_flag=True,
flag_value=True,
default=None,
help="Always output ANSI colours",
)
def main(force_colors: bool) -> None:
click.secho(
"+++ Checking schema deltas are in the right folder",
fg="green",
bold=True,
color=force_colors,
)
click.secho("Updating repo...")
repo = git.Repo()
repo.remote().fetch()
click.secho("Getting current schema version...")
r = repo.git.show("origin/develop:synapse/storage/schema/__init__.py")
locals: Dict[str, Any] = {}
exec(r, locals)
current_schema_version = locals["SCHEMA_VERSION"]
diffs: List[git.Diff] = repo.remote().refs.develop.commit.diff(None)
# Get the schema version of the local file to check against current schema on develop
with open("synapse/storage/schema/__init__.py") as file:
local_schema = file.read()
new_locals: Dict[str, Any] = {}
exec(local_schema, new_locals)
local_schema_version = new_locals["SCHEMA_VERSION"]
if local_schema_version != current_schema_version:
# local schema version must be +/-1 the current schema version on develop
if abs(local_schema_version - current_schema_version) != 1:
click.secho(
"The proposed schema version has diverged more than one version from develop, please fix!",
fg="red",
bold=True,
color=force_colors,
)
click.get_current_context().exit(1)
# right, we've changed the schema version within the allowable tolerance so
# let's now use the local version as the canonical version
current_schema_version = local_schema_version
click.secho(f"Current schema version: {current_schema_version}")
seen_deltas = False
bad_files = []
for diff in diffs:
if not diff.new_file or diff.b_path is None:
continue
match = SCHEMA_FILE_REGEX.match(diff.b_path)
if not match:
continue
seen_deltas = True
_, delta_version, _ = match.groups()
if delta_version != str(current_schema_version):
bad_files.append(diff.b_path)
if not seen_deltas:
click.secho(
"No deltas found.",
fg="green",
bold=True,
color=force_colors,
)
return
if not bad_files:
click.secho(
f"All deltas are in the correct folder: {current_schema_version}!",
fg="green",
bold=True,
color=force_colors,
)
return
bad_files.sort()
click.secho(
"Found deltas in the wrong folder!",
fg="red",
bold=True,
color=force_colors,
)
for f in bad_files:
click.secho(
f"\t{f}",
fg="red",
bold=True,
color=force_colors,
)
click.secho()
click.secho(
f"Please move these files to delta/{current_schema_version}/",
fg="red",
bold=True,
color=force_colors,
)
click.get_current_context().exit(1)
if __name__ == "__main__":
main()