My cheatsheet: http://www.wisdomandwonder.com/link/2028/how-pltcollects-works-in-plt-scheme
On Thu, Jan 19, 2012 at 4:50 PM, Imran Rafique <[email protected]> wrote: > Responding to the 2nd part (raco -link) > > Both $PLTCOLLECTS & `raco -link` persist across different racket > installations (ie: they're independent of how and when you compiled & > installed racket itself), but it seems that collections directories added by > `raco -link` take precedence over $PLTCOLLECTS. > > Eg: > # contents = /foo/imran/prelude.rkt > export PLTCOLLECTS="/foo:" > > # contents = /foo2/prelude.rkt > raco -link -n imran /foo2 > > Then, (require imran/prelude) *NEVER* looks in $PLTCOLLECTS. Even if the > copy in /foo2/prelude.rkt is a badly formed module, and > /foo/imran/prelude.rkt is correct. > > At least, thats what I discovered last night after installing from git :) > > -- > Regards, > Imran Rafique > > > On 19 January 2012 13:40, Eduardo Cavazos <[email protected]> wrote: >> >> Hello, >> >> I've been testing out my MPL libraries with Racket 5.2 on Windows 7. >> >> I generally use R6RS implementations and libraries. Thus, I tend to keep >> my library directories in "~/scheme" on Linux or "c:\users\myhomedir\scheme" >> on Windows. MPL has two dependencies (surfage and dharmalab; mentioned in >> the README) that should also be present in the library collection. >> >> So to "install" MPL for Racket on Windows, I simply modified my >> PLTCOLLECTS environment variable. At first I simply defined it as: >> >> c:\users\dharmatech\scheme >> >> However, having only that directory in PLTCOLLECTS caused major problems >> for DrRacket. >> >> My next step was to check the result of: >> >> (get-collects-search-dirs) >> >> and include those paths in PLTCOLLECTS as well. That seemed to do the >> trick. So my PLTCOLLECTS variable now looks like: >> >> C:\Users\dharmatech\AppData\Roaming\Racket\5.2\collects;C:\Program Files >> (x86)\R >> acket\collects;c:\users\dharmatech\scheme >> >> I'd like to provide some basic instructions in the README for getting >> started in a Windows environment with Racket and MPL. Should I suggest that >> the PLTCOLLECTS variable be modified as I've done above? >> >> Section 6.1.3 of the Racket guide recommends using 'raco link' to install >> collections. Would this somehow be better than the PLTCOLLECTS approach? The >> drawback to this is that it appears that the user would have to 'raco link' >> all three library collections (i.e. surfage, dharmalab, mpl). >> >> Once installed, MPL appears to function properly. The test suite passes >> when I run: >> >> c:\Program Files (x86)\Racket>plt-r6rs >> c:\Users\dharmatech\scheme\mpl\test.sps >> >> I recently added an '(mpl all)' library which exports commonly used >> procedures and macros. So to get a REPL up an running, in a DrRacket >> definitions window add: >> >> #!r6rs >> >> (import (mpl rnrs-sans) >> (mpl all)) >> >> hit "Run" and the MPL procedures/macros should available in the >> interactions window. >> >> I normally write my Scheme code as R6RS libraries, not as Racket modules >> and I don't have much experience with the latter. It'd be nice if Racket >> module authors could import MPL libraries into their normal racket modules. >> Of course, MPL exports procedures that conflict naming-wise with traditional >> procedures like +, -, *, /, sin, cos, etc. How should I handle this in >> Racket modules? As a first attempt at mixing Racket and MPL I tried: >> >> #lang racket >> >> (require (lib "mpl/sum-product-power.sls")) >> >> When I multiply 'x' times 'x' I get: >> >> > (* 'x 'x) >> (mcons '^ (mcons 'x (mcons 2 '()))) >> >> In Petite Chez Scheme I get: >> >> > (* 'x 'x) >> (^ x 2) >> >> I guess the 'mcons' stuff is due to the mutable/immutable pairs difference >> between R6RS and default racket. >> >> In R6RS, as shown above, I usually do '(import (mpl rnrs-sans) (mpl >> all))'. The library '(mpl rnrs-sans)' is equivalent to '(rnrs)' except for >> procedures which conflict name-wise with MPL procedures. Would you recommend >> setting up something similar for Racket so that the user can do: >> >> #lang racket-sans >> >> (require (lib "mpl/all.sls")) >> >> Thanks for any hints and tips! >> >> The MPL github project page is at: >> >> https://github.com/dharmatech/mpl >> >> Ed >> ____________________ >> Racket Users list: >> http://lists.racket-lang.org/users > > > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > -- http://www.wisdomandwonder.com/ ACM, AMA, COG, IEEE ____________________ Racket Users list: http://lists.racket-lang.org/users
