Monkey Patch Listen SymlinkDetector warning (#182)

* Monkey Patch Listen::Record::SymlinkDetector#_fail

This removes the warning made from Ruby while still keeping it available with
the Listen.logger on :warn level

You can enable symlink warnings with `LISTEN_GEM_DEBUGGING=warn` when using retest

* Silence Ruby warnings when monkey patching Listen module

Author: AlexB52

Gemfile.lock

@@ -10,7 +10,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     byebug (11.1.3)
-    ffi (1.15.5)
+    ffi (1.16.3)
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)

lib/config/listen.rb

@@ -0,0 +1,29 @@
+# lib/config/listen.rb:4: warning: method redefined; discarding old _fail
+# ~/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/listen-3.8.0/lib/listen/record/symlink_detector.rb:35: warning: previous definition of _fail was here
+
+# Runs a block of code without warnings.
+def silence_warnings(&block)
+  warn_level = $VERBOSE
+  $VERBOSE = nil
+  result = block.call
+  $VERBOSE = warn_level
+  result
+end
+
+silence_warnings do
+
+  # TODO: Update monkey patch when decision is made about
+  #       https://github.com/guard/listen/issues/572
+
+  module Listen
+    class Record
+      class SymlinkDetector
+        def _fail(symlinked, real_path)
+          Listen.logger.warn(format(SYMLINK_LOOP_ERROR, symlinked, real_path))
+          raise Error, "Don't watch locally-symlinked directory twice"
+        end
+      end
+    end
+  end
+
+end

lib/retest.rb

@@ -1,4 +1,6 @@
 require 'listen'
+require 'config/listen'
+
 require 'string/similarity'
 require 'observer'