add log_initial_strategy setting

lib/chewy/config.rb

@@ -62,7 +62,12 @@ class Config
       :default_field_type,
 
       # Chewy search request DSL base class, used by every index.
-      :search_class
+      :search_class,
+
+      # Log the first strategy added to stack. May be useful to set to false
+      # when you don't need messages about it being added to (removed from) stack
+      # on every request. Will preserve logging further strategy stack updates.
+      :log_initial_strategy
 
     def self.delegated
       public_instance_methods - superclass.public_instance_methods - Singleton.public_instance_methods
@@ -82,6 +87,7 @@ def initialize
       @default_root_options = {}
       @default_field_type = 'string'.freeze
       self.search_class = Chewy::Search::Request
+      @log_initial_strategy = true
     end
 
     def transport_logger=(logger)

lib/chewy/strategy.rb

@@ -54,14 +54,14 @@ def current
 
     def push(name)
       result = @stack.push resolve(name).new
-      debug "[#{@stack.size}] <- #{current.name}"
+      debug "[#{@stack.size}] <- #{current.name}" if Chewy.log_initial_strategy || @stack.length > 2
       result
     end
 
     def pop
       raise "Can't pop root strategy" if @stack.one?
-      debug "[#{@stack.size}] -> #{current.name}"
       result = @stack.pop.tap(&:leave)
+      debug "[#{@stack.size+1}] -> #{result.name}" if Chewy.log_initial_strategy || @stack.size > 1
       result
     end
 
@@ -77,7 +77,10 @@ def wrap(name)
     def debug(string)
       return unless Chewy.logger && Chewy.logger.debug?
       line = caller.detect { |l| l !~ %r{lib/chewy/strategy.rb:|lib/chewy.rb:} }
-      Chewy.logger.debug(["DEBUG: Chewy strategies stack: #{string}", line.sub(/:in\s.+$/, '')].join(' @ '))
+      Chewy.logger.debug([
+        "DEBUG: Chewy strategies stack: #{string}, now #{current.name}",
+        line.sub(/:in\s.+$/, '')
+      ].join(' @ '))
     end
 
     def resolve(name)

spec/chewy/config_spec.rb

@@ -17,6 +17,7 @@
   its(:reset_no_replicas) { should == false }
   its(:disable_refresh_async) { should == false }
   its(:search_class) { should be < Chewy::Search::Request }
+  its(:log_initial_strategy) { should == true }
 
   describe '#transport_logger=' do
     let(:logger) { Logger.new('/dev/null') }