Alignment of instrument names

[Francesco Napoleoni]

Hello everyone

A foreword: I’m an italian enthusiastic LilyPond user and I want to thank you 
all for your efforts in making such a beautiful piece of software.

Now my question: (how) can I get instrument names at the start of staves 
automatically aligned to the internal page margin?

The code (minimal, I hope) is attached as mozart.ly and the result as 
mozart.pdf. The problem is that the string “Violoncello e contrabbasso” goes 
out of the page edge, as can be seen on the pdf.

At the moment the only workaround I have found is to fiddle with “indent”.

I have to add that in some handcrafted editions I have seen, the indentation 
of the first system is based on the width of the longest instrument name, 
the latter starting at the printing margin.

In principle such alignment could be obtained enclosing the column of all the 
instrument names in a box, which in turn could be aligned to the printing 
margin, but I don’t have a clue on how to achieve this in LilyPond.

Any ideas?

Thank you
Francesco Napoleoni

mozart.pdf
Description: Adobe PDF document

mozart.ly
Description: Text Data