Add debug/info logging for knife config file finding

To resolve a chicken/egg issue with the logger being configured *after*
the config is located and read, knife will now check for a KNIFE_DEBUG
variable and initialize the logger to debug early in the startup process
when that variable is set.

1 files changed, 72 insertions, 0 deletions

diff --git a/lib/chef/null_logger.rb b/lib/chef/null_logger.rb
new file mode 100644
index 0000000000..5195cc5ce2
--- /dev/null
+++ b/lib/chef/null_logger.rb
@@ -0,0 +1,72 @@
+#
+# Author:: Daniel DeLeo (<dan@getchef.com>)
+# Copyright:: Copyright (c) 2014 Chef Software, Inc
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+class Chef
+
+  # Null logger implementation that just ignores everything. This is used by
+  # classes that are intended to be reused outside of Chef, but need to offer
+  # logging functionality when used by other Chef code.
+  #
+  # It does not define the full interface provided by Logger, just enough to be
+  # a reasonable duck type. In particular, methods setting the log level, log
+  # device, etc., are not implemented because any code calling those methods
+  # probably expected a real logger and not this "fake" one.
+  class NullLogger
+
+    def fatal(message, &block)
+    end
+
+    def error(message, &block)
+    end
+
+    def warn(message, &block)
+    end
+
+    def info(message, &block)
+    end
+
+    def debug(message, &block)
+    end
+
+    def add(severity, message=nil, progname=nil)
+    end
+
+    def <<(message)
+    end
+
+    def fatal?
+      false
+    end
+
+    def error?
+      false
+    end
+
+    def warn?
+      false
+    end
+
+    def info?
+      false
+    end
+
+    def debug?
+      false
+    end
+
+  end
+end