Support for number charts, transposition when generating charts.

src/pco_chordspkg/cliconstants.nim

@@ -1,4 +1,4 @@
-const PCO_CHORDS_VERSION* = "0.4.1"
+const PCO_CHORDS_VERSION* = "0.5.0"
 
 const USAGE* = """Usage:
   pco_chords [options]
@@ -6,12 +6,20 @@ const USAGE* = """Usage:
 
 Options:
 
-  -i, --input <in-file>     Read input from <in-file> (rather than from
+  -i, --input <in-file>       Read input from <in-file> (rather than from
                               STDIN, which is the default).
 
-  -o, --output <out-file>   Write output to <out-file> (rather than from
+  -o, --output <out-file>     Write output to <out-file> (rather than from
                               STDOUT, which is the default).
 
+  -t, --transpose <distance>  Transpose the chart by the given number of
+                              semitones. Distance can be expressed as a
+                              positive or negative number of semitones,
+                              for example: 4, +3 or -5.
+
+  -n, --number-chart          Write out a chart using the Nashville number
+                              system rather than explicit pitches.
+
   --help                      Print this usage information
   --debug                     Enable debug logging.
   --echo-args                 Echo the input parameters.