Hi John, A couple of questions:
Although that’s how I ended up here, my actual problem came when I thought “oh, I could just add this to my local copy of the number-theory package, and test whether my implementation is faster or slower than modular-expt.” I don’t understand why you need to “add this to … local copy of the number-theory package”? If you want to compare your version with the math package’s version, you can do something like: #lang racket (require math/number-theory) (define (my-modular-expt a n) ...) (time (my-modular-expt ...)) ; test your version (time (modular-expt ...)) ; test the `math` package's version In fact, by modifying the math package, you will no longer have the math package’s version to compare to! Slightly off-topic: do you find that the math package’s version is too slow? Why did you try to implement your own version in the first place? Best, On Tue, Feb 16, 2021 at 5:24 PM Robby Findler <ro...@cs.northwestern.edu> wrote: > I would not do it quite that way. Here's the steps I recommend: > > git clone https://github.com/racket/racket.git > cd racket > make # get some coffee here > mkdir extra-pkgs > cd extra-pkgs > # make sure `raco` in your path is the one you built just above > raco pkg update --clone math > > .... now do git stuff / racket stuff. > > The upside to avoiding the "PREFIX=..." is that the racket installation is > now completely contained in that directory. Just throw it away when you're > done with it and if you have more than one (perhaps you want to try out an > older version or a released version or something) all you have to do is > update your path. And if you want to update to get some bug fix or > improvement, simply do a git pull and make in the top-level directory > again. (That "make" really does include all of the steps, like it'll run > configure and do all kinds of things so you don't have to worry about it.) > And the "extra-pkgs" directory is just the convention some of us use. > > Robby > > > On Tue, Feb 16, 2021 at 7:10 PM John Kemp <stable.pseudo...@gmail.com> > wrote: > >> > On Feb 16, 2021, at 3:49 PM, Robby Findler <ro...@cs.northwestern.edu> >> wrote: >> > >> > I think you probably want to use "raco update --clone math" and you'll >> end up with a directory named "math": where you run that that is a clone of >> the racket/math github repo and the racket installation you ran "raco" from >> will now use that as the source. Then you can add a remote to it with your >> clone to work on a pull request. You should be able to do this with your >> own built version of racket (which you get by running "make" in the top >> level of a clone of racket/racket) or in a snapshot build or probably even >> in 8.0. >> > >> > Does that help? >> >> Thanks Robby, that definitely helped (although I’m not finished getting >> this to work). >> >> Checking the correct sequence: >> >> 0. cd ~/src >> 1. git clone https://github.com/racket/racket.git >> 2. cd racket && make PREFIX=/usr/local >> 3. cd .. && /usr/local/bin/raco pkg update —clone math (this worked FWIW >> and cloned the math collection to my ~/src directory) >> 4. cd racket && make PREFIX=/usr/local (to install the updated math >> package into this copy of racket) >> 5. /usr/local/bin/racket (to test changes in REPL) >> >> In my case, I think part of my problem was a) two copies of Racket >> installed (so I needed to be more specific about which raco to use) and b) >> not understanding where raco is doing its work. >> >> Cheers, >> >> - johnk >> >> > >> > Robby >> > >> > >> > On Tue, Feb 16, 2021 at 2:36 PM John Kemp <stable.pseudo...@gmail.com> >> wrote: >> > Hi there, >> > >> > I implemented an alternative to the modular-expt function in the >> math/number-theory package, that uses bit-shift ( >> https://gist.github.com/frumioj/2dcc1364464508ec359075d5014d0157), as >> proposed by Bruce Scheier (pseudocode in >> https://en.wikipedia.org/wiki/Modular_exponentiation). >> > >> > Although that’s how I ended up here, my actual problem came when I >> thought “oh, I could just add this to my local copy of the number-theory >> package, and test whether my implementation is faster or slower than >> modular-expt.” >> > >> > First, I forked the github racket/math repo, and couldn’t see a way to >> build that independently of Racket. So then I checked out the racket repo >> itself, which uses raco to get me a copy of the math package collection. I >> was able to build with that, but it seems unconnected to the github >> racket/math repo. >> > >> > I tried various raco incantations to see if it were possible to get a >> copy of my forked math package, but nothing seemed to work, and I am >> concerned I misunderstood the instructions in >> https://docs.racket-lang.org/racket-build-guide/index.html >> > >> > Is there any document that describes how I should be able to both build >> and use a local math/number-theory package, and also be able to use my >> forked copy of that repo to commit my changes? Is it possible for me to >> *only* check out racket/math and build it for my local Racket installation? >> > >> > Thank you, >> > >> > - johnk >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "Racket Developers" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to racket-dev+unsubscr...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/racket-dev/E30EA0E9-DC7F-498C-9F67-42554EBB757E%40gmail.com >> . >> >> -- > You received this message because you are subscribed to the Google Groups > "Racket Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-dev+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-dev/CAL3TdONM%3DGm_t%3DO_X%3D%3DOcR1oj94yTXnSJ8zp3hU3OQ-qsFN2BA%40mail.gmail.com > <https://groups.google.com/d/msgid/racket-dev/CAL3TdONM%3DGm_t%3DO_X%3D%3DOcR1oj94yTXnSJ8zp3hU3OQ-qsFN2BA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Racket Developers" group. 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