[Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Yann Golanski
I cannot seem to be able to install yi via cabal install.  The error I
get is as follows.  I suspect alex is not installed in the correct
place.  

; sudo cabal install yi
Resolving dependencies...
Downloading yi-0.4.3...
Configuring yi-0.4.3...
cabal: alex version =2.0.1  3 is required but it could not be found.
cabal: Error: some packages failed to install:
yi-0.4.3 failed during the configure step. The exception was:
exit: ExitFailure 1
; sudo cabal install alex
Resolving dependencies...
Downloading alex-2.2...
[1 of 1] Compiling Main ( Setup.lhs, dist/setup/Main.o )
Linking dist/setup/setup ...
Warning: defaultUserHooks in Setup script is deprecated.
Configuring alex-2.2...
Warning: No 'build-type' specified. If you do not need a custom Setup.hs
or
./configure script then use 'build-type: Simple'.
Preprocessing executables for alex-2.2...
Building alex-2.2...
[...]
Linking dist/build/alex/alex ...
Installing: /home/yann/.cabal/bin
; sudo cabal install yi
Resolving dependencies...
'yi-0.4.3' is cached.
Configuring yi-0.4.3...
cabal: alex version =2.0.1  3 is required but it could not be found.
cabal: Error: some packages failed to install:
yi-0.4.3 failed during the configure step. The exception was:
exit: ExitFailure 1


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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Austin Seipp
Excerpts from Yann Golanski's message of Wed Jul 30 02:34:05 -0500 2008:
 I cannot seem to be able to install yi via cabal install.  The error I
 get is as follows.  I suspect alex is not installed in the correct
 place.  
 ...

Hi,

cabal-install will put installed binaries in $HOME/.cabal/bin by
default as far as I can tell, you should move the binary somewhere in
your $PATH if you want cabal-install to pick it up for installing yi.

Austin
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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Yann Golanski
Quoth Austin Seipp on Wed, Jul 30, 2008 at 03:45:49 -0500
 Excerpts from Yann Golanski's message of Wed Jul 30 02:34:05 -0500 2008:
  I cannot seem to be able to install yi via cabal install.  The error I
  get is as follows.  I suspect alex is not installed in the correct
  place.  
  ...
 
 Hi,
 
 cabal-install will put installed binaries in $HOME/.cabal/bin by
 default as far as I can tell, you should move the binary somewhere in
 your $PATH if you want cabal-install to pick it up for installing yi.

Well, that indeed sorted that one.  But still no luck:

; sudo cabal install yi
Resolving dependencies...
'yi-0.4.3' is cached.
Configuring yi-0.4.3...
Preprocessing library yi-0.4.3...
Preprocessing executables for yi-0.4.3...
Building yi-0.4.3...

Yi/UI/Vty.hs:42:7:
Could not find module `Graphics.Vty':
  Use -v to see a list of the files searched for.
cabal: Error: some packages failed to install:
yi-0.4.3 failed during the building phase. The exception was:
exit: ExitFailure 1

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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Nicolas Pouillard
Excerpts from Yann Golanski's message of Wed Jul 30 10:59:35 +0200 2008:
 Quoth Austin Seipp on Wed, Jul 30, 2008 at 03:45:49 -0500
  Excerpts from Yann Golanski's message of Wed Jul 30 02:34:05 -0500 2008:
   I cannot seem to be able to install yi via cabal install.  The error I
   get is as follows.  I suspect alex is not installed in the correct
   place.  
   ...
  
  Hi,
  
  cabal-install will put installed binaries in $HOME/.cabal/bin by
  default as far as I can tell, you should move the binary somewhere in
  your $PATH if you want cabal-install to pick it up for installing yi.
 
 Well, that indeed sorted that one.  But still no luck:
 
 ; sudo cabal install yi
 Resolving dependencies...
 'yi-0.4.3' is cached.
 Configuring yi-0.4.3...
 Preprocessing library yi-0.4.3...
 Preprocessing executables for yi-0.4.3...
 Building yi-0.4.3...
 
 Yi/UI/Vty.hs:42:7:
 Could not find module `Graphics.Vty':
   Use -v to see a list of the files searched for.
 cabal: Error: some packages failed to install:
 yi-0.4.3 failed during the building phase. The exception was:
 exit: ExitFailure 1
 

Can you try the vty flag:

$ sudo cabal install yi -fvty

-- 
Nicolas Pouillard aka Ertai


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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Duncan Coutts

On Wed, 2008-07-30 at 03:45 -0500, Austin Seipp wrote:
 Excerpts from Yann Golanski's message of Wed Jul 30 02:34:05 -0500 2008:
  I cannot seem to be able to install yi via cabal install.  The error I
  get is as follows.  I suspect alex is not installed in the correct
  place.  
  ...
 
 Hi,
 
 cabal-install will put installed binaries in $HOME/.cabal/bin by
 default as far as I can tell, you should move the binary somewhere in
 your $PATH if you want cabal-install to pick it up for installing yi.

Yep. See this ticket:

http://hackage.haskell.org/trac/hackage/ticket/289

Of course if anyone would like to volunteer to implement this we'd all
appreciate it.


Duncan

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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Yann Golanski
Quoth Nicolas Pouillard on Wed, Jul 30, 2008 at 11:06:43 +0200
 Excerpts from Yann Golanski's message of Wed Jul 30 10:59:35 +0200 2008:
  ; sudo cabal install yi
  Resolving dependencies...
  'yi-0.4.3' is cached.
  Configuring yi-0.4.3...
  Preprocessing library yi-0.4.3...
  Preprocessing executables for yi-0.4.3...
  Building yi-0.4.3...
  
  Yi/UI/Vty.hs:42:7:
  Could not find module `Graphics.Vty':
Use -v to see a list of the files searched for.
  cabal: Error: some packages failed to install:
  yi-0.4.3 failed during the building phase. The exception was:
  exit: ExitFailure 1
  
 
 Can you try the vty flag:
 
 $ sudo cabal install yi -fvty

Sadly, I get the same error as before.

What debugging output would you need?

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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread John Dorsey
 [problems with cabal install yi]

Curious, I tried this out, on a Debian etch box with GHC 6.8.3.

cabal update ; cabal install yi --global
complained about needing alex =2.0.something and 3.

Then cabal install alex happily installed alex version 2.2.  Finally,
cabal install yi --global worked fine.

Is something amiss with cabal-install?  Shouldn't it have automatically
installed alex?  Or does it only do that with libraries, by design?

For that matter, ghc-pkg list | grep -i alex doesn't list anything,
after I cabal-installed it.  How does cabal verify the prerequisite alex
version?  (Or does it?)

I'm enjoying cabal since I've begun using it, but it's still somewhat
opaque to me.

Regards,
John Dorsey

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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Austin Seipp
Excerpts from John Dorsey's message of Wed Jul 30 13:58:26 -0500 2008:
 Is something amiss with cabal-install?  Shouldn't it have automatically
 installed alex?  Or does it only do that with libraries, by design?

AFAICT, dependencies are only downloaded and installed if they are
listed in a .cabal files 'dependency' field (providing they aren't
already installed) which yes, means libraries by design. I've not had
cabal-install ever track down necessary applications in my
experience.

As well, this issue came up on #haskell the other day and my
conclusion is that no, cabal does not track down and install any
*applications* that are necessary (someone tried to install yi, needed
alex, build failed, and after 'cabal-install alex' everything was
peachy.)

 For that matter, ghc-pkg list | grep -i alex doesn't list anything,
 after I cabal-installed it.  How does cabal verify the prerequisite alex
 version?  (Or does it?)

ghc-pkg lists libraries that are registered with the ghc package
manager (globally and locally); alex is simply an application, not a
library, so there's really nothing for GHC to register. As for telling
what version is necessary, I haven't the slightest.

Duncan, can you shed some light here?

Austin
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Re: [Haskell-cafe] Cabal + yi + alex problem.

2008-07-30 Thread Duncan Coutts

On Wed, 2008-07-30 at 14:58 -0400, John Dorsey wrote:
  [problems with cabal install yi]
 
 Curious, I tried this out, on a Debian etch box with GHC 6.8.3.
 
 cabal update ; cabal install yi --global
 complained about needing alex =2.0.something and 3.
 
 Then cabal install alex happily installed alex version 2.2.  Finally,
 cabal install yi --global worked fine.
 
 Is something amiss with cabal-install?  Shouldn't it have automatically
 installed alex?  Or does it only do that with libraries, by design?

Right, currently it only tracks library dependencies, not tools. See:

http://hackage.haskell.org/trac/hackage/ticket/227
  cabal-install does consider build-tools as dependencies

 For that matter, ghc-pkg list | grep -i alex doesn't list anything,
 after I cabal-installed it.

The ghc package database is of libraries. Applications are not
registered anywhere.

 How does cabal verify the prerequisite alex version?  (Or does it?)

It calls alex --version

 I'm enjoying cabal since I've begun using it, but it's still somewhat
 opaque to me.

There's still plenty of work to do. You and indeed everyone else is most
welcome to get involved and have a go at fixing bugs or adding
frequently requested features.

Easy tickets:
  http://hackage.haskell.org/trac/hackage/report/13

Guide to the source code:
  http://hackage.haskell.org/trac/hackage/wiki/SourceGuide


Duncan

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