LilyPond : how to write numbers before staves?

Question

I'm writing some exercises, one per line, and I would like to write a number before each one.

I can't figure out how to do that, so a little help would be appreciated!

My code is pretty simple :

\language "english"
\header {title = "C Major"}

{
  \time 4/4
c' d' e' f' d' e' f' g' e' f' g' a' f' g' a' b' g' a' b' c'' a' b' c'' d'' b' c'' d'' e'' c'' d'' e'' f'' 
}

{
  \time 4/4
f'' e'' d'' c'' e'' d'' c'' b' d'' c'' b' a' c'' b' a' g' b' a' g' f' a' g' f' e' g' f' e' d' f' e' d' c' 
}

Answer 1

If you want to number the staves automatically, you can write some Scheme and label each staff with instrumentName = #(score-number):

\version "2.19.81"

#(define sn 0)

#(define (score-number)
   (set! sn (1+ sn))
   (string-append (number->string sn)))  % "."

\new Staff \with { instrumentName = #(score-number) } { \time 4/4 c' d' e' }

\new Staff \with { instrumentName = #(score-number) } { \time 4/4 c' d' e' }

Answer 2

The standard way of putting anything before a staff is by setting its instrumentName property.

You can put

\set Staff.instrumentName = "1"

into the music, or declare the staff adding a 'with' clause:

\new Staff \with { instrumentName = "1" } { \time 4/4 c' d' e' }

\new Staff \with { instrumentName = "2" } { \time 4/4 f'' e'' d'' }