Re: Allow parallelism in input/regression/lilypond-book/ (issue 547680043 by address@hidden)

[hanwenn]

On 2020/02/23 10:04:46, hanwenn wrote:
> On 2020/02/23 09:49:24, dak wrote:
> > Stupid question: does the database design of lilypond-book even
allow for
> > uncoordinated parallel runs?
> 
> It's not a stupid question; it's a good question.  
> 
> Writing files atomically (open temp file, write, close, rename), seems
a lot of
> work.
> 
> I've considered adding an advisory lock on the DB directory. Since we
max out
> CPUs when we run lp-book, it shouldn't slow down things, but I was
worried about
> doing file locks cross-platform.
> 
> Maybe I can do flock(1), which at least lets limit the worry to OSX
vs. Linux.

to answer your original question: I think the \sourcefileline statements
can differ between snippets written from different lp-book instances,
and this can trigger a consistency check failure.


https://codereview.appspot.com/547680043/