Nathaniel, I'm not sure what the software is supposed to do with fine grained dynamic metadata that would make very much sense to the end user. I think you could probably get away with a single flag Dynamic: true / false. Iff true, pip runs the dist-info command after installing bootstrap dependencies. You could still complain if the name & version changed. Of course in a VCS checkout or during development you probably always want the regenerate-metadata behavior.
On Wed, Oct 28, 2015 at 5:18 AM Nathaniel Smith <n...@pobox.com> wrote: > On Tue, Oct 27, 2015 at 7:00 AM, David Cournapeau <courn...@gmail.com> > wrote: > > > > > > On Tue, Oct 27, 2015 at 1:12 PM, Daniel Holth <dho...@gmail.com> wrote: > >> > >> The drawback of .zip is file size since it compresses each file > >> individually rather than giving the compression algorithm a larger > input, > >> it's a great format otherwise. Ubiquitous including Apple iOS packages, > >> Java, word processor file formats. And most Python packages are small. > > > > > > I don't really buy the indexing advantages, especially w/ the current > > implementation of zipfile in python (e.g. loading the whole set of > archives > > at creation time) > > Can you elaborate about what you mean? AFAICT from a quick skim of the > source code, zipfile does eagerly read in the table of contents for > the zip file (i.e., it reads out the list of files and their > metadata), but no actual files are decompressed until you ask for them > individually, and when you do request a specific file then it can be > accessed in O(1) time. This is really different from .tar.gz, where > you have to decompress the entire archive just to get a list of files, > and then you need to decompress the whole thing again each time you > want to access a single file inside. > > (Regarding the size thing, yeah, .tar.gz is smaller, and .tar.bz2 > smaller than that, and .tar.xz smaller again, ... but this doesn't > strike me as an argument for throwing up our hands and leaving the > choice to individual projects, because it's not like they know what > the optimal trade-off is either. IMO we should pick one, and zip is > Good Enough.) > > -n > > -- > Nathaniel J. Smith -- http://vorpus.org >
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