# See https://github.com/returntocorp/semgrep/blob/experimental/docs/config/advanced.md

rules:
####################### PYTHON RULES #######################
  - id: deprecated-render-usage
    pattern: django.shortcuts.render_to_response(...)
    message: "Use render() (from django.shortcuts) instead of render_to_response()"
    languages: [python]
    severity: ERROR

  - id: useless-if-body
    patterns:
      - pattern: |
          if $X:
              $S
          else:
              $S
    message: "Useless if statment; both blocks have the same body"
    languages: [python]
    severity: ERROR

  - id: dont-use-stream-objects-filter
    pattern: Stream.objects.filter(...)
    message: "Please use access_stream_by_*() to fetch Stream objects"
    languages: [python]
    severity: ERROR
    paths:
      - directory: "zerver/views/"

  - id: dont-import-models-in-migrations
    patterns:
      - pattern-not: from zerver.lib.redis_utils import get_redis_client
      - pattern-not: from zerver.lib.utils import generate_random_token
      - pattern-not: from zerver.models import filter_pattern_validator
      - pattern-not: from zerver.models import filter_format_validator
      - pattern-not: from zerver.models import generate_email_token_for_stream
      - pattern-either:
          - pattern: from zerver import $X
          - pattern: from analytics import $X
          - pattern: from confirmation import $X
    message: "Don't import models or other code in migrations; see docs/subsystems/schema-migrations.md"
    languages: [python]
    severity: ERROR
    paths:
      - directory: "**/migrations"
      - path-not: 'zerver/migrations/0032_verify_all_medium_avatar_images.py'
      - path-not: 'zerver/migrations/0104_fix_unreads.py'
      - path-not: 'zerver/migrations/0206_stream_rendered_description.py'
      - path-not: 'zerver/migrations/0209_user_profile_no_empty_password.py'
      - path-not: 'zerver/migrations/0260_missed_message_addresses_from_redis_to_db.py'
      - path-not: 'pgroonga/migrations/0002_html_escape_subject.py'

  - id: logging-format
    languages: [python]
    pattern-either:
      - pattern: logging.debug(... % ...)
      - pattern: logging.debug(... .format(...))
      - pattern: logger.debug(... % ...)
      - pattern: logger.debug(... .format(...))
      - pattern: logging.info(... % ...)
      - pattern: logging.info(... .format(...))
      - pattern: logger.info(... % ...)
      - pattern: logger.info(... .format(...))
      - pattern: logging.warning(... % ...)
      - pattern: logging.warning(... .format(...))
      - pattern: logger.warning(... % ...)
      - pattern: logger.warning(... .format(...))
      - pattern: logging.error(... % ...)
      - pattern: logging.error(... .format(...))
      - pattern: logger.error(... % ...)
      - pattern: logger.error(... .format(...))
      - pattern: logging.critical(... % ...)
      - pattern: logging.critical(... .format(...))
      - pattern: logger.critical(... % ...)
      - pattern: logger.critical(... .format(...))
    severity: ERROR
    message: "Pass format arguments to logging (https://docs.python.org/3/howto/logging.html#optimization)"

  - id: sql-format
    languages: [python]
    pattern-either:
      - pattern: ... .execute(... % ...)
      - pattern: ... .execute("...".format(...))
      - pattern: psycopg2.sql.SQL(... % ...)
      - pattern: psycopg2.sql.SQL(... .format(...))
    severity: ERROR
    message: "Do not write a SQL injection vulnerability please"