<div dir="ltr">Hi Sam,<div> <div>I was replacing net/url, but with a copy of the system library which I was modifying in a way that would not alter the existing public interface. I was relying on some external packages like racket-couchdb that I'd rather keep working as-is in terms of the net/url interface. At least at that time I thought then that this was an important consideration.</div> <div> </div><div>However, I've found that there are a few changes I should make to net/*l that will indeed break dependencies. And once you start down that road, the fun never stops. Then it took just a couple of minutes to rename my copy of the "net" directory and all references in dependencies.</div> <div> </div><div>Still, I do think this is a useful case to support (i.e. shadowing a system collection), and works well enough with DrRacket.</div><div> </div><div>Erik.</div></div></div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Oct 22, 2013 at 6:19 PM, Sam Tobin-Hochstadt <<a href="mailto:samth@cs.indiana.edu" target="_blank">samth@cs.indiana.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Tue, Oct 22, 2013 at 8:54 PM, Erik Pearson <<a href="mailto:erik@adaptations.com">erik@adaptations.com</a>> wrote: > Thanks. > > raco link -d <collections-dir> is working, that is, my collections are > found, although I still have one little problem. The precedence of my linked > collection directory seems to be lower than for the built-in collections. > With the explicit collections directory setting in drracket I'm able to set > the github directory higher, which allows me to shadow built-in collections. > Now my code is loading the built in collection, rather than the replacement > I'm using. > > A workaround could be to rename the replacement collection (net), which is > not a big deal, but inconvenient. > > Please let me know if I'm wrong about this. Otherwise, is there a > recommended way to shadow a system collection? One question: are you replacing actual system libraries, or just adding new things to, for example, the `net` collection? If you're just adding `net/quic` or something like that, then the precedence shouldn't matter. If you're actually _replacing_ something like `net/url`, then that's more worrying, because it will potentially cause parts of Racket to break. Sam > > Thanks, Erik. > > > On Tue, Oct 22, 2013 at 4:42 PM, Sam Tobin-Hochstadt <<a href="mailto:samth@cs.indiana.edu">samth@cs.indiana.edu</a>> > wrote: >> >> On Tue, Oct 22, 2013 at 7:36 PM, Greg Hendershott >> <<a href="mailto:greghendershott@gmail.com">greghendershott@gmail.com</a>> wrote: >> > I think the equivalent to DrRacket's Collection Paths setting might be >> > to use the PLTCOLLECTS environment variable? See: >> > >> > <a href="http://docs.racket-lang.org/reference/collects.html" target="_blank">http://docs.racket-lang.org/reference/collects.html</a> >> > >> > Also there are a number of command-line flags; I'm not sure which >> > corresponds to exactly what you need: >> > >> > $ racket -h >> > ... >> > -X <dir>, --collects <dir> : Main collects at <dir> (or "" disables >> > all) >> > -S <dir>, --search <dir> : More collects at <dir> (after main >> > collects) >> > -A <dir>, --addon <dir> : Addon directory at <dir> >> > -R <paths>, --compiled <paths> : Set compiled-file search roots to >> > <paths> >> > -C <file>, --links <file> : User-specific collection links at <file> >> > ... >> >> `-S` is the one that's like `PLTCOLLECTS`. >> >> But more generally, I would strongly encourage Erik (and others) not >> to use PLTCOLLECTS or its analogues, but instead to use the package >> system (or `raco link`). >> >> `raco link` is probably the simplest thing to do here, like so: >> >> raco link -d /home/epearson/work/racket/github >> >> That should set up all the collections you have. >> >> Better still would be to set up a package, even one locally that you >> don't distribute. >> >> Sam >> >> >> > >> > On Tue, Oct 22, 2013 at 4:39 PM, Erik Pearson <<a href="mailto:erik@adaptations.com">erik@adaptations.com</a>> >> > wrote: >> >> Hi, >> >> I've just switched over to the Racket github master from 5.3.6. It is >> >> set up >> >> well enough that development proceeds normally. I have setup a >> >> collection >> >> directory which contains libraries that I'm developing and upon which >> >> my >> >> main projects depend. For DrRacket work I have used Language -> Choose >> >> Language ... -> Collection Paths to set this up, putting my collection >> >> path >> >> at the top so that it can override the system path if it needs to. >> >> Works >> >> great. >> >> >> >> But this Collection Paths setting does not seem to be honored by Racket >> >> -> >> >> Create Executable. Similarly from the command line raco exe does not >> >> seem to >> >> be using these preferences, nor can I figure out how to tell raco to >> >> use my >> >> collection directory. >> >> >> >> The specific error message I am getting is: >> >> >> >> /home/epearson/work/racket/coco/scgi-server.rkt:4:8: collection not >> >> found >> >> for module path: (lib "racqueb/scgi2") >> >> collection: "racqueb" >> >> in collection directories: >> >> /home/epearson/.racket/development/collects >> >> /home/epearson/work/racket/plt/plt/racket/collects >> >> context...: >> >> show-collection-err >> >> standard-module-name-resolver >> >> standard-module-name-resolver >> >> >> >> >> >> /home/epearson/work/racket/plt/plt/racket/collects/compiler/embed.rkt:394:0: >> >> get-code >> >> >> >> >> >> /home/epearson/work/racket/plt/plt/racket/collects/compiler/embed.rkt:993:0: >> >> do-write-module-bundle >> >> >> >> >> >> /home/epearson/work/racket/plt/plt/racket/collects/compiler/embed.rkt:1517:51 >> >> >> >> >> >> /home/epearson/work/racket/plt/plt/racket/collects/compiler/private/elf.rkt:190:6: >> >> temp19 >> >> >> >> As you can see, is using the default collection paths, and not the one >> >> that >> >> I've added via DrRacket preferences, which would be >> >> /home/epearson/work/racket/github. >> >> >> >> So, the question is -- first, I guess this might be considered a bug in >> >> DrRacket -- since Create Executable is not using the same collection >> >> paths >> >> as the IDE? Second, is there a way to supply raco exe and distribute >> >> with a >> >> new collection path? Ideally I would just supply a new one which is >> >> added to >> >> the top of the path list, but I could also just reconstruct the >> >> collection >> >> path list from scratch if need be. (The docs for >> >> create-embedding-executable >> >> imply this.) >> >> >> >> (BTW I'm not implying that anything has changed in this regard from >> >> 5.3.6. >> >> In 5.3.6 I had used links to the individual libraries, but in github >> >> master >> >> I had switched to using the collection paths, which is less maintenance >> >> and >> >> allows seamless shadowing of system libraries with custom >> >> replacements.) >> >> >> >> Thanks, >> >> Erik. >> >> >> >> >> >> ____________________ >> >> Racket Users list: >> >> <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> >> >> >> > ____________________ >> > Racket Users list: >> > <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> > > > > > -- > Erik Pearson > Adaptations > ;; web form and function </blockquote></div> <div> </div>-- Erik Pearson Adaptations ;; web form and function </div>