1 files changed, 7 insertions, 0 deletions
diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
index 46333c8986..8507182a60 100644
--- a/lib/bundler/settings.rb
+++ b/lib/bundler/settings.rb
@@ -54,6 +54,13 @@ module Bundler
     end
 
     def []=(key, value)
+      if self[:given_flags]
+        Bundler::SharedHelpers.major_deprecation \
+          "Starting in Bundler 2.0, flags passed to commands "\
+          "will no longer be automatically remembered. Instead please set flags " \
+          "you want remembered between commands using `bundle config "\
+          "<setting name> <setting value>`, i.e. `bundle config #{key} #{value}`."
+      end
       local_config_file || raise(GemfileNotFound, "Could not locate Gemfile")
       set_key(key, value, @local_config, local_config_file)
     end