Re: debian control file out of date? was: Re: live cd-with lilypondhttp://lilypond.org/doc/v2.10/Documentation/topdocs/INSTALL

[Karl Hammar]

Reinhold wrote:
> Am Sonntag, 31. August 2008 schrieb Karl Hammar:
> > Thomas wrote:
> > > On Sat, 2008-08-30 at 22:16 +0100, Rob Canning wrote:
> > > > the debian package lilypond-data has a pre-depend of  texlive  though
> > > > lilypond  no longer has a runtime dependency on tex
> > ...
> > As long as lilypond-book is included there is a dependancy on latex.
> No, there is not. lilypond-book does not need latex, it simply is able to 
> process a file in latex syntax and generate output, that can then be 
> processed with latex. But latex is not required for lilypond-book. It's only 
> required if you want to process that file further.
...

This tells me another story (tt.lytex is the example from [1]):

$ /home/karl/most/music/lilypond/git/lilypond/out/bin/lilypond-book  tt.lytex
lilypond-book (GNU LilyPond) 2.11.58
Reading tt.lytex...
Running latex...This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
 %&-line parsing enabled.
entering extended mode
(/home/karl/tmp/tmpQsPjvx.tex
LaTeX2e <2005/12/01>
Babel <v3.8h> and hyphenation patterns for english, usenglishmax, dumylang, noh
...

lilypond-book do start up another program as seen by:

$ strace /home/karl/most/music/lilypond/git/lilypond/out/bin/lilypond-book  
tt.lytex 2>&1 | grep -C5 clone
close(4)                                = 0
write(2, "Running latex...", 16Running latex...)        = 16
pipe([4, 5])                            = 0
fcntl64(5, F_GETFD)                     = 0
fcntl64(5, F_SETFD, FD_CLOEXEC)         = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 
child_tidptr=0xb7dd66f8) = 6488
close(5)                                = 0
mmap2(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xb797a000
read(4, "", 1048576)                    = 0
mremap(0xb797a000, 1052672, 4096, MREMAP_MAYMOVE) = 0xb797a000
close(4)                                = 0
$

And if you look into the code, you will find:

$ grep -A20 '^def get_latex_textwidth' scripts/out/lilypond-book
def get_latex_textwidth (source):
    m = re.search (r'''(?P<preamble>\\begin\s*{document})''', source)
    if m == None:
        warning (_ ("cannot find \\begin{document} in LaTeX document"))
        
        ## what's a sensible default?
        return 550.0
    
    preamble = source[:m.start (0)]
    latex_document = LATEX_INSPECTION_DOCUMENT % vars ()
    
    (handle, tmpfile) = tempfile.mkstemp('.tex')
    logfile = os.path.splitext (tmpfile)[0] + '.log'
    logfile = os.path.split (logfile)[1]

    tmp_handle = os.fdopen (handle,'w')
    tmp_handle.write (latex_document)
    tmp_handle.close ()
    
    ly.system ('%s %s' % (global_options.latex_program, tmpfile),
               be_verbose=global_options.verbose)
$

lilypond-book only uses latex to extract the textwidh, but there is 
still a dependancy. You might not want to have it, but then you have to 
find the textwidth in another way.

Regards,
/Karl

[1] 
http://lilypond.org/doc/v2.11/Documentation/user/lilypond-program/An-example-of-a-musicological-document