[Haskell-cafe] cannot install regex-posix using cabal ?
%ghc-pkg list|grep -i regex regex-base-0.93.2 %cabal install regex-posix Resolving dependencies... Configuring regex-posix-0.94.4... Preprocessing library regex-posix-0.94.4... running dist/build/Text/Regex/Posix/Wrap_hsc_make failed command was: dist/build/Text/Regex/Posix/Wrap_hsc_make >dist/build/Text/Regex/Posix/Wrap.hs cabal: Error: some packages failed to install: regex-posix-0.94.4 failed during the building phase. The exception was: ExitFailure 1 How can i fix such a problem ? - e^(π.i) + 1 = 0 -- View this message in context: http://haskell.1045720.n5.nabble.com/cannot-install-regex-posix-using-cabal-tp3301201p3301201.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: archiver 0.1 and 0.2
I'd like to announce a small utility and library which builds on my
WebArchive plugin for gitit: archiver
http://hackage.haskell.org/package/archiver Source is available via
`darcs get http://community.haskell.org/~gwern/archiver/`.
The library half is a simple wrapper around the appropriate HTTP
requests; the executable half reads a text file and loops as it
(slowly) fires off requests and deletes the appropriate URL.
That is, 'archiver' is a daemon which will process a specified text
file, each line of which is a URL, and will one by one request that
the URLs be archived or spidered by http://www.webcitation.org * and
http://www.archive.org ** for future reference. That is, WebCite and
the IA will store a copy of the HTML and hopefully all the non-dynamic
resources the web pages need. (An example would be
http://bits.blogs.nytimes.com/2010/12/07/palm-is-far-from-game-over-says-former-chief/
and http://webcitation.org/5ur7ifr12)
Usage of archiver might look like `while true; do archiver ~/.urls.txt
gwe...@gmail.com; done`***.
There are a number of ways to populate the source text file. For
example, I have a script `firefox-urls` which is called in my crontab
every hour, and which looks like this:
#!/bin/sh
set -e
cp `find ~/.mozilla/ -name "places.sqlite"` ~/
sqlite3 places.sqlite "SELECT url FROM moz_places, moz_historyvisits \
WHERE moz_places.id =
moz_historyvisits.place_id and visit_date > strftime('%s','now','-1
day')*100 ORDER by \
visit_date;" >> ~/.urls.txt
rm ~/places.sqlite
This gets all visited URLs in the last time period and prints them out
to the file for archiver to process. Hence, everything I browse is
backed-up.
More useful perhaps is a script to extract external links from
Markdown files and print them to stdout:
import System.Environment (getArgs)
import Text.Pandoc (defaultParserState, processWithM,
readMarkdown, Inline(Link), Pandoc)
main = getArgs >>= mapM readFile >>= mapM_ analyzePage
analyzePage x = processWithM printLinks (readMarkdown defaultParserState x)
printLinks (Link _ (x, _)) = putStrLn x >> return undefined
printLinks x = return x
So now I can take `find . -name "*.page"`, pass the 100 or so Markdown
files in my wiki as arguments, and add the thousand or so external
links to the archiver queue (eg. `find . -name "*.page" | xargs
runhaskell link-extractor.hs >> ~/.urls.txt`); they will eventually be
archived/backed up and when combined with a tool like link-checker
means that there never need be any broken links since one can either
find a live link or use the archived version.
General comments: I've used archiver for a number of weeks now. It has
never caught up with my Firefox-generated backlog since WebCite seems
to have IP-based throttling so you can't request more often than once
per 20 seconds, according to my experiments, so I removed the hinotify
'watch file' functionality. It may be I was too hasty in removing it.
* http://en.wikipedia.org/wiki/WebCite
** http://en.wikipedia.org/wiki/Internet_Archive
*** There are sporadic exceptions from somewhere in the network or
HTTP libraries, I think
http://linkchecker.sourceforge.net/
--
gwern
http://www.gwern.net
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Re: [Haskell-cafe] ANN: Digestive functors 0.0.2.0
On 12/10/10 10:38, Jasper Van der Jeugt wrote:
> Hello,
>
> Thanks for the error report. Is blaze-html installed correctly? Could
> you cabal install blaze-html and verify that you can import Text.Blaze
> in ghci?
>
Here's the terminal session:
--{--cut here--
/home/evansl/prog_dev/haskell/my-code/digestive-functors $ cabal install
blaze-html
Resolving dependencies...
No packages to be installed. All the requested packages are already
installed.
If you want to reinstall anyway then use the --reinstall flag.
/home/evansl/prog_dev/haskell/my-code/digestive-functors $ cat TextBlaze.hs
module TextBlaze where
import Text.Blaze
/home/evansl/prog_dev/haskell/my-code/digestive-functors $ ghci TextBlaze.hs
GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling TextBlaze( TextBlaze.hs, interpreted )
Ok, modules loaded: TextBlaze.
*TextBlaze>
--}--cut here--
HTH.
-Larry
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Re: [Haskell-cafe] Haskell and javascript
One nice thing that WebSharp does is that you can annotate types and functions and then use them on both sides - on the client and on the server - almost transparently. Then you can write common utility functions once, but you only maintain one code-base and one build workflow. I haven't used it yet, but it looks like a neat idea. Antoine On Fri, Dec 10, 2010 at 10:35 AM, aditya siram wrote: > HJScript[1] ? > > [1] http://hackage.haskell.org/package/HJScript-0.5.0 > > On Fri, Dec 10, 2010 at 9:52 AM, jean-christophe mincke > wrote: >> Hello, >> I have just discovered WebSharp, a .Net product for web development that >> allows you to write client code in F# and have it translated into >> javascript. >> Does anyone know about somethig similar in Haskell? >> >> Thank you >> Regards >> J-C >> >> ___ >> Haskell-Cafe mailing list >> Haskell-Cafe@haskell.org >> http://www.haskell.org/mailman/listinfo/haskell-cafe >> >> > > ___ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: Digestive functors 0.0.2.0
Hello,
Thanks for the error report. Is blaze-html installed correctly? Could
you cabal install blaze-html and verify that you can import Text.Blaze
in ghci?
Cheers,
Jasper
On Fri, Dec 10, 2010 at 5:07 PM, Larry Evans wrote:
> On 12/09/10 16:46, Jasper Van der Jeugt wrote:
>> Hello all,
>>
>> I'm very glad to announce the 0.0.2.0 release of the digestive
>> functors library. The library provides a general API to input
>> consumption, and is an upgrade of formlets.
>>
>> I've written an announcing blogpost and tutorial with more information here:
>>
>> http://jaspervdj.be/posts/2010-12-09-digestive-functors-0.0.2.html
>>
>
> Hi jasper.
>
> Following the instructions on the .html page, I did:
>
> cabal update
> cabal install snap-server
> cabal install digestive-functors-blaze
> cabal install digestive-functors-snap
>
> However, when I tried:
>
> runghc -v 2010-12-09-digestive-functors-0.0.2.lhs
>
> I got:
>
> --{--cut here--
>
> *** Chasing dependencies:
> Chasing modules from: *2010-12-09-digestive-functors-0.0.2.lhs
> Created temporary directory: /tmp/ghc7611_0
> *** Literate pre-processor:
> /usr/lib/ghc-6.12.1/unlit -h 2010-12-09-digestive-functors-0.0.2.lhs
> 2010-12-09-digestive-functors-0.0.2.lhs /tmp/ghc7611_0/ghc7611_0.lpp
>
> 2010-12-09-digestive-functors-0.0.2.lhs:15:9:
> Could not find module `Text.Digestive.Blaze.Html5':
> locations searched:
> Text/Digestive/Blaze/Html5.hs
> Text/Digestive/Blaze/Html5.lhs
> Failed, modules loaded: none.
> *** Deleting temp files:
> Deleting: /tmp/ghc7611_0/ghc7611_0.lpp
>
> --}--cut here--
>
> In directory:
>
> /home/evansl/.cabal/lib/digestive-functors-blaze-0.0.2.0/ghc-6.12.1/Text/Digestive/Blaze
>
> there is:
>
> -rw-r--r-- 1 evansl evansl 13984 Dec 10 09:18 Html5.hi
>
> Please, what should I do?
>
> -regards,
> Larry
>
>
>
> ___
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Re: [Haskell-cafe] Haskell and javascript
HJScript[1] ? [1] http://hackage.haskell.org/package/HJScript-0.5.0 On Fri, Dec 10, 2010 at 9:52 AM, jean-christophe mincke wrote: > Hello, > I have just discovered WebSharp, a .Net product for web development that > allows you to write client code in F# and have it translated into > javascript. > Does anyone know about somethig similar in Haskell? > > Thank you > Regards > J-C > > ___ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > > ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: Digestive functors 0.0.2.0
On 12/09/10 16:46, Jasper Van der Jeugt wrote:
> Hello all,
>
> I'm very glad to announce the 0.0.2.0 release of the digestive
> functors library. The library provides a general API to input
> consumption, and is an upgrade of formlets.
>
> I've written an announcing blogpost and tutorial with more information here:
>
> http://jaspervdj.be/posts/2010-12-09-digestive-functors-0.0.2.html
>
Hi jasper.
Following the instructions on the .html page, I did:
cabal update
cabal install snap-server
cabal install digestive-functors-blaze
cabal install digestive-functors-snap
However, when I tried:
runghc -v 2010-12-09-digestive-functors-0.0.2.lhs
I got:
--{--cut here--
*** Chasing dependencies:
Chasing modules from: *2010-12-09-digestive-functors-0.0.2.lhs
Created temporary directory: /tmp/ghc7611_0
*** Literate pre-processor:
/usr/lib/ghc-6.12.1/unlit -h 2010-12-09-digestive-functors-0.0.2.lhs
2010-12-09-digestive-functors-0.0.2.lhs /tmp/ghc7611_0/ghc7611_0.lpp
2010-12-09-digestive-functors-0.0.2.lhs:15:9:
Could not find module `Text.Digestive.Blaze.Html5':
locations searched:
Text/Digestive/Blaze/Html5.hs
Text/Digestive/Blaze/Html5.lhs
Failed, modules loaded: none.
*** Deleting temp files:
Deleting: /tmp/ghc7611_0/ghc7611_0.lpp
--}--cut here--
In directory:
/home/evansl/.cabal/lib/digestive-functors-blaze-0.0.2.0/ghc-6.12.1/Text/Digestive/Blaze
there is:
-rw-r--r-- 1 evansl evansl 13984 Dec 10 09:18 Html5.hi
Please, what should I do?
-regards,
Larry
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[Haskell-cafe] Haskell and javascript
Hello, I have just discovered WebSharp, a .Net product for web development that allows you to write client code in F# and have it translated into javascript. Does anyone know about somethig similar in Haskell? Thank you Regards J-C ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell-2010 binary IO
Haskell supports binary IO via openBinaryFile, hGetBuf, and hPutBuf . Advanced types like ByteString or Binary are not part of Haskell 2010, I assume because they're too complex to be part of the language standard. On Thu, Dec 9, 2010 at 23:14, Permjacov Evgeniy wrote: > Does haskell 2010 include binary IO? If no, what was the reason? > > ___ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell flickr bindings: "invalid signature" when uploading
Yes, that seems to be the reasonable assumption though I can't find any good changelogs for the api. Further investigation will have to wait until after the weekend :-) Cheers, D On Fri, Dec 10, 2010 at 12:51 PM, Stuart Dootson wrote: > > On 10 Dec 2010, at 12:39 PM, Dougal Stanton wrote: > >> I've mailed the maintainer of the flickr api package but thought I >> would see if other people had this experience too. Google doesn't >> reveal many people using this package as far as I can tell. >> >> In short, authentication works fine but uploading images fails with >> this message. This happens with the included examples/Uploader.hs as >> well as my own code. >> >> toRequest: POST request contains 1 files; unable to represent as query string >> Defaulting to multiform/form-data instead >> Flickr error: >> >> Code: 96 >> Type: Flickr API error >> Details: Invalid signature >> >> I haven't had a chance to dive deeper into this yet, but any advice >> gratefully received. >> >> Cheers, >> >> >> D >> -- >> Dougal Stanton >> dou...@dougalstanton.net // http://www.dougalstanton.net > > That wouldn't surprise me - I have a suspicion the Flickr API has changed > since hs-flickr was released - certainly there are issues with things like > getting full comment information out, for which I've made some mods within a > local copy of hs-flickr, with a mind to push them sometime. > > Stuart Dootson -- Dougal Stanton dou...@dougalstanton.net // http://www.dougalstanton.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell flickr bindings: "invalid signature" when uploading
On 10 Dec 2010, at 12:39 PM, Dougal Stanton wrote: > I've mailed the maintainer of the flickr api package but thought I > would see if other people had this experience too. Google doesn't > reveal many people using this package as far as I can tell. > > In short, authentication works fine but uploading images fails with > this message. This happens with the included examples/Uploader.hs as > well as my own code. > > toRequest: POST request contains 1 files; unable to represent as query string > Defaulting to multiform/form-data instead > Flickr error: > > Code: 96 > Type: Flickr API error > Details: Invalid signature > > I haven't had a chance to dive deeper into this yet, but any advice > gratefully received. > > Cheers, > > > D > -- > Dougal Stanton > dou...@dougalstanton.net // http://www.dougalstanton.net That wouldn't surprise me - I have a suspicion the Flickr API has changed since hs-flickr was released - certainly there are issues with things like getting full comment information out, for which I've made some mods within a local copy of hs-flickr, with a mind to push them sometime. Stuart Dootson ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] haskell flickr bindings: "invalid signature" when uploading
I've mailed the maintainer of the flickr api package but thought I would see if other people had this experience too. Google doesn't reveal many people using this package as far as I can tell. In short, authentication works fine but uploading images fails with this message. This happens with the included examples/Uploader.hs as well as my own code. toRequest: POST request contains 1 files; unable to represent as query string Defaulting to multiform/form-data instead Flickr error: Code: 96 Type: Flickr API error Details: Invalid signature I haven't had a chance to dive deeper into this yet, but any advice gratefully received. Cheers, D -- Dougal Stanton dou...@dougalstanton.net // http://www.dougalstanton.net ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Setting runtime memory limits on GHC programs to avoid thrashing
Enclosed is a simple script that sets GHCRTS and provides a reasonable memory limit on systems that have /proc/meminfo. By default, the GHC runtime will grow to a size that can cause thrashing. John memfree.sh Description: Bourne shell script ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC 7.0.1 developer challenges
Please excuse the grammar errors in my last post. I was very tired. The name of the package that supplies the free function on Linux is procps, not procpc. It's hosted on SourceForge. To compile my program, do the following: $ mv memfree.txt memfree.l $ make LDLIBS=-ll memfree John On Thu, Dec 9, 2010 at 11:36 PM, John D. Ramsdell wrote: > I found out how to compute a good memory limit for the GHC runtime on > Linux systems. One opens /proc/meminfo, and sums the free memory with > the reclaimable memory. The memory allocated to file buffers and the > disk cache are reclaimable, and can be added to the memory of a > growing GHC process. Once you get beyond that memory size, thrashing > is in your futures. > > I have enclosed a short lex program that computes the limit. It's > basically what is done by the procpc program called free, except that > I printed only the number of interest to a GHC runtime. > > John > ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Missing Functor instances in GHC 7?
On Fri, 2010-12-10 at 08:33 +, Simon Peyton-Jones wrote: > If there's a consensus that the behaviour is wrong, or at least > unexpected, would you like to make a reproducible test case and file a > ticket? I took Erik's mail as indicator that the behaviour of GHCi is inconsistent and unexpected: http://hackage.haskell.org/trac/ghc/ticket/4832 Sebastian ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell-2010 binary IO
On Fri, Dec 10, 2010 at 11:30 AM, Henning Thielemann wrote: > > On Fri, 10 Dec 2010, Permjacov Evgeniy wrote: > >> Does haskell 2010 include binary IO? If no, what was the reason? > > Isn't binary IO solved using ByteString and Binary packages - is there a > need to put them into the Haskell report? I would add that by providing the FFI, Haskell 2010 makes the ByteString and binary packages possible and therefore it does support binary IO, albeit the process is greatly simplified by usage of these higher-level libraries. Michael ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] haskell-2010 binary IO
On Fri, 10 Dec 2010, Permjacov Evgeniy wrote: Does haskell 2010 include binary IO? If no, what was the reason? Isn't binary IO solved using ByteString and Binary packages - is there a need to put them into the Haskell report? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Missing Functor instances in GHC 7?
On Fri, Dec 10, 2010 at 09:33, Simon Peyton-Jones wrote: > | Interestingly, if I import only Control.Applicative from within GHCi, it > | does not find the instances defined in Control.Monad.Instances although > | this module is imported in Control.Applicative. On the other hand, if I > | write a file containing the line 'import Control.Applicative' and load > | this file in GHCi then the instances from Control.Monad.Instances are > | visible. > | > | Apparently, importing a module in GHCi differs from importing it in a > | Haskell file and loading this into GHCi. > > I don't believe that should happen, depending on exactly what you mean by > "importing a module in GHCi". I see this as well. Using "import Control.Applicative" in ghci doesn't seem to bring the instance into scope, while using ":m +Control.Applicative" does. See the log below. Note that the instance really isn't available, i.e. it's not a problem with :i. GHCi, version 7.0.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Prelude> :i Functor class Functor f where fmap :: (a -> b) -> f a -> f b (GHC.Base.<$) :: a -> f b -> f a -- Defined in GHC.Base instance Functor Maybe -- Defined in Data.Maybe instance Functor [] -- Defined in GHC.Base instance Functor IO -- Defined in GHC.Base Prelude> import Control.Applicative Prelude Control.Applicative> :i Functor class Functor f where fmap :: (a -> b) -> f a -> f b (<$) :: a -> f b -> f a -- Defined in GHC.Base instance Functor ZipList -- Defined in Control.Applicative instance Monad m => Functor (WrappedMonad m) -- Defined in Control.Applicative instance Functor (Const m) -- Defined in Control.Applicative instance Functor Maybe -- Defined in Data.Maybe instance Functor [] -- Defined in GHC.Base instance Functor IO -- Defined in GHC.Base Prelude Control.Applicative> :m +Control.Applicative Prelude Control.Applicative> :i Functor class Functor f where fmap :: (a -> b) -> f a -> f b (<$) :: a -> f b -> f a -- Defined in GHC.Base instance Functor (Either a) -- Defined in Control.Monad.Instances instance Functor ((->) r) -- Defined in Control.Monad.Instances instance Functor ((,) a) -- Defined in Control.Monad.Instances instance Functor ZipList -- Defined in Control.Applicative instance Monad m => Functor (WrappedMonad m) -- Defined in Control.Applicative instance Functor (Const m) -- Defined in Control.Applicative instance Functor Maybe -- Defined in Data.Maybe instance Functor [] -- Defined in GHC.Base instance Functor IO -- Defined in GHC.Base Prelude Control.Applicative> Erik ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Missing Functor instances in GHC 7?
| Interestingly, if I import only Control.Applicative from within GHCi, it | does not find the instances defined in Control.Monad.Instances although | this module is imported in Control.Applicative. On the other hand, if I | write a file containing the line 'import Control.Applicative' and load | this file in GHCi then the instances from Control.Monad.Instances are | visible. | | Apparently, importing a module in GHCi differs from importing it in a | Haskell file and loading this into GHCi. I don't believe that should happen, depending on exactly what you mean by "importing a module in GHCi". If there's a consensus that the behaviour is wrong, or at least unexpected, would you like to make a reproducible test case and file a ticket? Thanks! Simon ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
