add trace level

Signed-off-by: Thom May <thom@chef.io>

3 files changed, 18 insertions, 5 deletions

diff --git a/lib/mixlib/log.rb b/lib/mixlib/log.rb
index 0934f29..5bcb71d 100644
--- a/lib/mixlib/log.rb
+++ b/lib/mixlib/log.rb
@@ -94,6 +94,7 @@ module Mixlib
 
     # Sets the level for the Logger object by symbol.  Valid arguments are:
     #
+    #  :trace
     #  :debug
     #  :info
     #  :warn
@@ -103,7 +104,7 @@ module Mixlib
     # Throws an ArgumentError if you feed it a bogus log level.
     def level=(new_level)
       level_int = LEVEL_NAMES.key?(new_level) ? new_level : LEVELS[new_level]
-      raise ArgumentError, "Log level must be one of :debug, :info, :warn, :error, or :fatal" if level_int.nil?
+      raise ArgumentError, "Log level must be one of :trace, :debug, :info, :warn, :error, or :fatal" if level_int.nil?
       loggers.each { |l| l.level = level_int }
     end
 
@@ -119,7 +120,7 @@ module Mixlib
     # Note that we *only* query the default logger (@logger) and not any other
     # loggers that may have been added, even though it is possible to configure
     # two (or more) loggers at different log levels.
-    [:debug?, :info?, :warn?, :error?, :fatal?].each do |method_name|
+    [:trace?, :debug?, :info?, :warn?, :error?, :fatal?].each do |method_name|
       class_eval(<<-METHOD_DEFN, __FILE__, __LINE__)
         def #{method_name}
           logger.#{method_name}
diff --git a/lib/mixlib/log/child.rb b/lib/mixlib/log/child.rb
index 7234043..8f33daf 100644
--- a/lib/mixlib/log/child.rb
+++ b/lib/mixlib/log/child.rb
@@ -35,7 +35,7 @@ module Mixlib
       # Note that we *only* query the default logger (@logger) and not any other
       # loggers that may have been added, even though it is possible to configure
       # two (or more) loggers at different log levels.
-      [:debug?, :info?, :warn?, :error?, :fatal?].each do |method_name|
+      [:trace?, :debug?, :info?, :warn?, :error?, :fatal?].each do |method_name|
         class_eval(<<-METHOD_DEFN, __FILE__, __LINE__)
           def #{method_name}
             parent.send(:#{method_name})
diff --git a/lib/mixlib/log/logging.rb b/lib/mixlib/log/logging.rb
index 0e8aed9..be84527 100644
--- a/lib/mixlib/log/logging.rb
+++ b/lib/mixlib/log/logging.rb
@@ -21,7 +21,19 @@ module Mixlib
   module Log
     module Logging
 
-      LEVELS = { :debug => Logger::DEBUG, :info => Logger::INFO, :warn => Logger::WARN, :error => Logger::ERROR, :fatal => Logger::FATAL }.freeze
+      module Severity
+        include ::Logger::Severity
+        TRACE = -1
+
+        SEV_LABEL = %w{TRACE DEBUG INFO WARN ERROR FATAL ANY}.each(&:freeze).freeze
+
+        def to_label(sev)
+          SEV_LABEL[sev + 1] || -"ANY"
+        end
+      end
+      include Severity
+
+      LEVELS = { :trace => TRACE, :debug => DEBUG, :info => INFO, :warn => WARN, :error => ERROR, :fatal => FATAL }.freeze
       LEVEL_NAMES = LEVELS.invert.freeze
 
       attr_accessor :metadata
@@ -33,7 +45,7 @@ module Mixlib
 
       # Define the standard logger methods on this class programmatically.
       # No need to incur method_missing overhead on every log call.
-      [:debug, :info, :warn, :error, :fatal].each do |method_name|
+      [:trace, :debug, :info, :warn, :error, :fatal].each do |method_name|
         level = LEVELS[method_name]
         class_eval(<<-METHOD_DEFN, __FILE__, __LINE__)
         def #{method_name}(msg=nil, data: {}, &block)