add the feature as an option + update README

Author: CharlesDelannoy

README.md

@@ -329,7 +329,9 @@ SafePgMigrations.config.safe_timeout = 5.seconds # Statement timeout used for al
 
 SafePgMigrations.config.lock_timeout = nil # Lock timeout used for all DDL operations except from CREATE / DROP INDEX. If not set, safe_timeout will be used with a deduction of 1% to ensure that the lock timeout is raised in priority
 
-SafePgMigrations.config.max_lock_timeout_for_retry = 1.second # Max lock timeout for the retries for all DDL operations except from CREATE / DROP INDEX. Each retry will increase the lock_timeout by (max_lock_timeout_for_retry - lock_timeout) / max_tries
+SafePgMigrations.config.increase_lock_timeout_on_retry # Activate the lock timeout increase feature on retry if set to true. See max_lock_timeout_for_retry for more information.
+
+SafePgMigrations.config.max_lock_timeout_for_retry = 1.second # Max lock timeout for the retries for all DDL operations except from CREATE / DROP INDEX. Each retry will increase the lock_timeout (if increase_lock_timeout_on_retry option is set to true) by (max_lock_timeout_for_retry - lock_timeout) / max_tries
 
 SafePgMigrations.config.blocking_activity_logger_verbose = true # Outputs the raw blocking queries on timeout. When false, outputs information about the lock instead
 

lib/safe-pg-migrations/configuration.rb

@@ -13,6 +13,7 @@ class Configuration
                     max_tries
                     retry_delay
                     sensitive_logger
+                    increase_lock_timeout_on_retry
                   ])
     attr_reader :lock_timeout, :safe_timeout, :max_lock_timeout_for_retry
 
@@ -28,6 +29,7 @@ def initialize
       self.max_tries = 5
       self.max_lock_timeout_for_retry = 1.second
       self.sensitive_logger = nil
+      self.increase_lock_timeout_on_retry = false
     end
 
     def lock_timeout=(value)

lib/safe-pg-migrations/plugins/statement_retrier.rb

@@ -28,7 +28,7 @@ def retry_if_lock_timeout
         retry_delay = SafePgMigrations.config.retry_delay
         Helpers::Logger.say "Retrying in #{retry_delay} seconds...", sub_item: true
 
-        increase_lock_timeout unless SafePgMigrations.config.lock_timeout.nil?
+        increase_lock_timeout if SafePgMigrations.config.increase_lock_timeout_on_retry && !SafePgMigrations.config.lock_timeout.nil?
 
         sleep retry_delay
         Helpers::Logger.say 'Retrying now.', sub_item: true