Add edit option to clear note

lib/timetrap/cli.rb

@@ -71,6 +71,7 @@ module CLI
     -z, --append              Append to the current note instead of replacing it
                                 the delimiter between appended notes is
                                 configurable (see configure)
+    -c, --clear               Allow an empty note, can be used to clear existing notes
     -m, --move <sheet>        Move to another sheet
 
   * in - Start the timer for the current timesheet.
@@ -247,14 +248,18 @@ def edit
       end
 
       if Config['note_editor']
-        if args['-z']
+        if args['-c']
+          entry.update :note => ''
+        elsif args['-z']
           note = [entry.note, get_note_from_external_editor].join(Config['append_notes_delimiter'])
           entry.update :note => note
         elsif editing_a_note?
           entry.update :note => get_note_from_external_editor(entry.note)
         end
       else
-        if unused_args =~ /.+/
+        if args['-c']
+          entry.update :note => ''
+        elsif unused_args =~ /.+/
           note = unused_args
           if args['-z']
             note = [entry.note, note].join(Config['append_notes_delimiter'])

spec/timetrap_spec.rb

@@ -211,6 +211,16 @@ def invoke command
           expect(Timetrap::Timer.active_entry.note).to eq 'running entry//new//more'
         end
 
+        it "should allow clearing the description of the active period" do
+          expect(Timetrap::Timer.active_entry.note).to eq 'running entry'
+          invoke 'edit --clear'
+          expect(Timetrap::Timer.active_entry.note).to eq ''
+          invoke 'edit running entry'
+          expect(Timetrap::Timer.active_entry.note).to eq 'running entry'
+          invoke 'edit -c'
+          expect(Timetrap::Timer.active_entry.note).to eq ''
+        end
+
         it "should edit the start time of the active period" do
           invoke 'edit --start "yesterday 10am"'
           expect(Timetrap::Timer.active_entry.start).to eq Chronic.parse("yesterday 10am")
@@ -340,6 +350,20 @@ def invoke command
               expect(Timetrap::Timer.active_entry.note).to eq 'running entry//appended in editor'
             end
           end
+
+          context "clearing" do
+            it "should clear the last entry with -c" do
+              expect(Timetrap::Timer.active_entry.note).to eq 'running entry'
+              invoke "edit -c"
+              expect(Timetrap::Timer.active_entry.note).to eq ''
+            end
+
+            it "should clear the last entry with --clear" do
+              expect(Timetrap::Timer.active_entry.note).to eq 'running entry'
+              invoke "edit --clear"
+              expect(Timetrap::Timer.active_entry.note).to eq ''
+            end
+          end
         end
       end