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CloudFormation - Resource Schema Guard Rail

Breaking Change Rules

Library

Property Related CloudFormation Construct

Rule Name Check Id Message
ensure_old_property_not_removed PR001 "Resource properties MUST NOT be removed"
ensure_old_property_not_turned_immutable PR002 "Only NEWLY ADDED properties can be marked as createOnlyProperties"
ensure_old_property_not_turned_writeonly PR003 "Only NEWLY ADDED properties can be marked as writeOnlyProperties"
ensure_old_property_not_removed_from_readonly PR004 "Only NEWLY ADDED properties can be marked as readOnlyProperties"
PR005 "Resource properties MUST NOT be removed from readOnlyProperties"

Primary Identifier

Rule Name Check Id Message
ensure_primary_identifier_not_changed PID001 "primaryIdentifier cannot add more members"
PID002 "primaryIdentifier cannot remove members"

Required

Rule Name Check Id Message
ensure_no_more_required_properties RQ001 "cannot add more REQUIRED properties"

Type

Rule Name Check Id Message
ensure_property_type_not_changed TP001 "Only NEWLY ADDED properties can have new type added"
TP002 "cannot remove TYPE from a property"
TP003 "cannot change TYPE of a property"

Json Related Validation Constructs

Rule Name Check Id Message
ensure_enum_not_changed ENM001 "CANNOT remove values from enum"
ensure_minlength_not_contracted ML001 "cannot remove minLength from properties"
ML002 "only NEWLY ADDED properties can have additional minLength constraint"
ML003 "new minLength value cannot exceed old value"
ensure_maxlength_not_contracted ML004 "cannot remove maxLength from properties"
ML005 "only NEWLY ADDED properties can have additional maxLength constraint"
ML006 "new maxLength value cannot be less than the old value"
ensure_property_string_pattern_not_changed PAT001 "Only NEWLY ADDED properties can have new pattern added"
PAT002 "cannot remove PATTERN from a property"
PAT003 "cannot change PATTERN of a property"
ensure_minitems_not_contracted MI001 "cannot remove minItems from properties"
MI002 "only NEWLY ADDED properties can have additional minItems constraint"
MI003 "new minItems value cannot exceed old value"
ensure_maxitems_not_contracted MI004 "cannot remove maxItems from properties"
MI005 "only NEWLY ADDED properties can have additional maxItems constraint"
MI006 "new maxItems value cannot be less than the old value"
ensure_minimum_not_contracted MI007 cannot remove minimum from properties
MI008 "only NEWLY ADDED properties can have additional minimum constraint"
MI009 "new minimum value cannot exceed old value"
MI010 "cannot remove maximum from properties"
MI011 "only NEWLY ADDED properties can have additional maximum constraint"
MI012 "new maximum value cannot be less than the old value"

Non CFN Enforced Rules

Rule Name Check Id Message
ensure_default_values_have_not_changed TFDF001 "cannot remove default values from properties"
TFDF002 "cannot change default values"