bundler.rb in bundler-2.5.10

- old
+ new

@@ -38,10 +38,11 @@
   ORIGINAL_ENV = environment_preserver.restore
   environment_preserver.replace_with_backup
   SUDO_MUTEX = Thread::Mutex.new
 
   autoload :Checksum,               File.expand_path("bundler/checksum", __dir__)
+  autoload :CLI,                    File.expand_path("bundler/cli", __dir__)
   autoload :CIDetector,             File.expand_path("bundler/ci_detector", __dir__)
   autoload :Definition,             File.expand_path("bundler/definition", __dir__)
   autoload :Dependency,             File.expand_path("bundler/dependency", __dir__)
   autoload :Deprecate,              File.expand_path("bundler/deprecate", __dir__)
   autoload :Digest,                 File.expand_path("bundler/digest", __dir__)
@@ -160,9 +161,28 @@
       if groups.empty?
         # Load all groups, but only once
         @setup = load.setup
       else
         load.setup(*groups)
+      end
+    end
+
+    # Automatically install dependencies if Bundler.settings[:auto_install] exists.
+    # This is set through config cmd `bundle config set --global auto_install 1`.
+    #
+    # Note that this method `nil`s out the global Definition object, so it
+    # should be called first, before you instantiate anything like an
+    # `Installer` that'll keep a reference to the old one instead.
+    def auto_install
+      return unless settings[:auto_install]
+
+      begin
+        definition.specs
+      rescue GemNotFound, GitError
+        ui.info "Automatically installing missing gems."
+        reset!
+        CLI::Install.new({}).run
+        reset!
       end
     end
 
     # Setups Bundler environment (see Bundler.setup) if it is not already set,
     # and loads all gems from groups specified. Unlike ::setup, can be called