Allow setting of default temperature scale

README.md

@@ -53,6 +53,7 @@ If you are running an older version of OS X and the install fails you might want
   --no-scale                           Display just the stat value
   --value-only                         No graph, label, or scale
   -f, --fahrenheit                     Display temperatures in fahrenheit
+  -c, --celcius                        Display temperatures in celcius (default)
 
   for more help see: https://github.com/Chris911/iStats
 ```
@@ -65,6 +66,15 @@ iStats now supports extra sensors for advanced users. Here's how to enable that
 2. Enable extra sensors by running `istats enable key` or `istats enable all`
 3. Run `istats` or `istats extra` to see the extra sensors information.
 
+The temperature scale can be configured persistently by adding a section to `~/.iStats/sensors.conf` like this:
+
+```
+[app_config]
+temperature_scale = fahrenheit
+```
+
+The valid values are 'fahrenheit' and 'celcius' (which is the default) and can be overridden using the corresponding command line options.
+
 ## Contributing
 
 1. Fork it

lib/iStats/command.rb

@@ -88,7 +88,7 @@ def parse_options
           :display_graphs => true,
           :display_labels => true,
           :display_scale => true,
-          :temperature_scale => 'celcius',
+          :temperature_scale => ($config.params.dig('app_config', 'temperature_scale') || 'celcius').downcase
         }
 
         opt_parser = OptionParser.new do |opts|
@@ -123,6 +123,10 @@ def parse_options
           opts.on('-f', '--fahrenheit', 'Display temperatures in fahrenheit') do
             options[:temperature_scale] = 'fahrenheit'
           end
+
+          opts.on('-c', '--celcius', 'Display temperatures in celcius (default)') do
+            options[:temperature_scale] = 'celcius'
+          end
         end
 
         begin
@@ -175,6 +179,7 @@ def help(error = nil)
           --no-scale                           Display just the stat value
           --value-only                         No graph, label, or scale
           -f, --fahrenheit                     Display temperatures in fahrenheit
+          -c, --celcius                        Display temperatures in celcius (default)
 
           for more help see: https://github.com/Chris911/iStats
         ".gsub(/^ {8}/, '') # strip the first eight spaces of every line

lib/iStats/version.rb

@@ -1,3 +1,3 @@
 module IStats
-  VERSION = '1.6.1'
+  VERSION = '1.6.2'
 end