* On Sat, Jan 15, 2011 at 12:08 AM, Paul Smith <psm...@gnu.org> wrote: > * On Fri, 2011-01-14 at 19:57 +0100, Ralf Wildenhues wrote: >> <http://gittup.org/tup/build_system_rules_and_algorithms.pdf>. >> >> No idea whether they are standardized somehow or somewhere. > > http://www.mail-archive.com/help-make@gnu.org/msg08500.html > I think some of that discussion was quite illuminating.
Yes, it is interesting reading. It has quite outstanding features, for example it could tell where parallelization depedencies are missing or wrong and probably even /what/ is wrong. As far as I know there are build systems (ElectricAccelerator) that use such information to fix such issues (rebuild the file when inputs changed to get the correct result and show up some warning). When having a source three constructed of several (sub-) packages, how does a Beta-Build system looks like? Could there be tupfiles including sub-tup-files? What influence has the choice of a Beta-Build to the maintainability of such a sub package? Can they still be orthogonal to each other? How portable can a Beta-Build system be? Isn't it requiring specific extentions to watch the file system by some event bus or such? Is it "simple, stupid"? What happens when changing files during a build? In the example with X, X' and Y, will Y ever show up? Wouldn't a Beta Build include those new changes instantly? (I'm not telling that this would be a disadvantage). How does it work? By overloading libc functions? Or does it even need a kernel module? Access via network file systems such as NFS works? I think a good Beta-Build-System could have some portability mode used when no file system watching works; it could fall-back to a Alpha-Builder, is this right? Would this require to distribute some generated depedency database files or so to make the fall back know needed things which are not in a tupfile? I wonder whether something like a Beta-Build-System is "the future" of building or if there are applications/projects or at least niches where make will persist. Ohh, this was quite out of topic, but an interesting topic. oki, Steffen
