Difference between revisions of "Haskell package guidelines (Italiano)"

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'''Haskell on Arch Linux'''
 
'''Haskell on Arch Linux'''
  
Haskell is well supported on Arch Linux, with GHC and other key tools available via pacman, and 87% percent of [http://hackage.haskell.org hackage.haskell.org] library database [http://aur.archlinux.org/packages.php?O=0&L=0&C=0&K=arch-haskell&SeB=m&SB=n&SO=a&PP=100&do_Search=Go available via AUR].
+
Haskell is well supported on Arch Linux, with GHC and other key tools available via pacman, a growing number of packages made available by the ArchHaskell group, and a large part of [http://hackage.haskell.org hackage.haskell.org] library database [http://aur.archlinux.org/packages.php?O=0&L=0&C=0&K=arch-haskell&SeB=m&SB=n&SO=a&PP=100&do_Search=Go available via AUR].
  
'''[http://code.haskell.org/arch/arch-haskell-status.html The status of all Haskell packages in Arch Linux]'''
+
The community around Haskell on Arch is active and well organized but your help is always welcome.
 
+
The community around Haskell on Arch is also active and well organized.
+
  
 
== Community ==
 
== Community ==
  
The main resources for the Arch/Haskell community to interact and discuss are:
+
All the details on the [[ArchHaskell]] group is available on its own page.
 
+
* [http://www.gogloom.com/FreeNode/arch-haskell <nowiki>#arch-haskell</nowiki>] irc channel @ freenode.org
+
** Good for quick discussion and planning
+
* [http://haskell.org/mailman/listinfo/arch-haskell arch-haskell@haskell.org] mailing list
+
** Broader announcements, and automated updates
+
* [http://archhaskell.wordpress.com/ Arch Haskell Weekly News]
+
** A blog announcing our progress to the outside world.
+
  
 
== Haskell Packages ==
 
== Haskell Packages ==
Line 30: Line 21:
  
 
==== <nowiki>[Extra]</nowiki> ====
 
==== <nowiki>[Extra]</nowiki> ====
 +
 
* [http://www.archlinux.org/packages/?arch=x86_64&repo=Extra&q=haskell&last_update=&limit=50 Haskell packages in the core system]
 
* [http://www.archlinux.org/packages/?arch=x86_64&repo=Extra&q=haskell&last_update=&limit=50 Haskell packages in the core system]
  
Our [http://haskell.org/haskellwiki/Arch_Linux/Policy policy] is for [extra] to provide the Haskell platform, and popular Haskell applications.
+
Our policy is for [extra] to provide the Haskell platform, and popular Haskell applications.
 +
 
 +
==== <nowiki>[haskell]</nowiki> ====
 +
 
 +
The packages maintained by the ArchHaskell group can be accessed by adding the following entry to pacman.conf:
 +
 
 +
[haskell]
 +
Server = http://andromeda.kiwilight.com/$repo/$arch
  
 
==== <nowiki>AUR</nowiki> ====
 
==== <nowiki>AUR</nowiki> ====
Line 45: Line 44:
  
 
Anything not found here can be installed via [http://aur.archlinux.org/packages.php?ID=17411 cabal-install] direct from Hackage.
 
Anything not found here can be installed via [http://aur.archlinux.org/packages.php?ID=17411 cabal-install] direct from Hackage.
 
== Direction and strategy ==
 
 
The strategy for Haskell on Arch Linux is to support the Haskell platform suite in [extra], and to track Hackage via AUR. This has been adopted as an [http://haskell.org/haskellwiki/Arch_Linux/Policy official policy document].
 
  
 
== Guidelines ==
 
== Guidelines ==
  
In almost all cases cabalised Haskell packages can be automatically translated into Arch packages, via the cabal2arch tool.
+
In almost all cases cabalised Haskell packages can be automatically translated into Arch packages, via the cabal2arch tool. It is strongly recommended that you use the latest released version of this tool, as it implements the packaging policy for Haskell packages.  You can get it in several ways:
  
* [http://aur.archlinux.org/packages.php?ID=17471 Get the latest cabal2arch]
+
* Add the <nowiki>[haskell]</nowiki> repository to pacman.conf and use pacman do install the latest release.
 +
* Download and build the [http://aur.archlinux.org/packages.php?ID=17471 source from AUR], either manually or using one of the many [[AUR Helpers]].
 +
* Install directly from Hackage using "cabal install cabal2arch".
  
It is strongly recommended that you use this tool, as it implements the packaging policy for Haskell packages.
+
===cabal2arch: an example===
These packages are primarily managed by Don Stewart.
+
  
Development version:
+
This example illustrates how to create a new package with cabal2arch. We'll make a new package for the delimited continuations library, CC-delcont:
  
* darcs get http://code.haskell.org/~dons/code/cabal2arch
+
First, set the name and email address to be used in the generated PKGBUILD:
  
Or:
+
export ARCH_HASKELL='My Name <my.name@domain.org>'
  
* cabal install cabal2arch
+
Second, find [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/CC-delcont the hackage page for CC-delcont], then identify the link to the .cabal file. Use this link as an argument to cabal2arch:
  
Most things on http://hackage.haskell.org that are packageable, are already in AUR.
+
<pre>
 +
% cd /tmp
 +
% cabal2arch http://hackage.haskell.org/packages/archive/pandoc/1.6.0.1/pandoc.cabal
 +
Using /tmp/tmp.x9SEhTJ8N9/pandoc.cabal
 +
Feeding the PKGBUILD to `makepkg -g`...
 +
==> Retrieving Sources...
 +
  -> Downloading pandoc-1.6.0.1.tar.gz...
 +
--2011-01-30 22:12:18--  http://hackage.haskell.org/packages/archive/pandoc/1.6.0.1/pandoc-1.6.0.1.tar.gz
 +
Resolving hackage.haskell.org... 69.30.63.204
 +
Connecting to hackage.haskell.org|69.30.63.204|:80... connected.
 +
HTTP request sent, awaiting response... 200 OK
 +
Length: 355477 (347K) [application/x-tar]
 +
Saving to: `pandoc-1.6.0.1.tar.gz.part'
  
If not, download and build cabal2arch, as below, and use that to create
+
    0K .......... .......... .......... .......... .......... 14% 20.3K 15s
the package. This will ensure it follows standard naming, dependency and installation conventions. Drop by #arch-haskell to let us know what is going on.
+
    50K .......... .......... .......... .......... .......... 28% 40.3K 9s
 +
  100K .......... .......... .......... .......... .......... 43% 53.0K 6s
 +
  150K .......... .......... .......... .......... .......... 57% 58.2K 4s
 +
  200K .......... .......... .......... .......... .......... 72% 57.7K 2s
 +
  250K .......... .......... .......... .......... .......... 86% 67.1K 1s
 +
  300K .......... .......... .......... .......... .......   100% 76.4K=7.7s
  
===cabal2arch: an example===
+
2011-01-30 22:12:27 (44.9 KB/s) - `pandoc-1.6.0.1.tar.gz.part' saved [355477/355477]
 
+
This example illustrates how to create a new package with cabal2arch. We'll make a
+
new package for the delimited continuations library, CC-delcont:
+
 
+
First, find [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/CC-delcont the hackage page for CC-delcont], then identify the link to the .cabal file. Use this link
+
as an argument to cabal2arch:
+
  
$ cd /tmp
+
==> Generating checksums for source files...
$ cabal2arch http://hackage.haskell.org/packages/archive/CC-delcont/0.2/CC-delcont.cabal
+
</pre>
Using /tmp/tmp.Ig0H8jCOyO/CC-delcont.cabal
+
Fetching http://hackage.haskell.org/packages/archive/CC-delcont/0.2/CC-delcont-0.2.tar.gz
+
Created /tmp/haskell-cc-delcont.tar.gz
+
  
 
Checking what was created:
 
Checking what was created:
  
  $ ls
+
  % ls
  haskell-cc-delcont haskell-cc-delcont.tar.gz
+
  haskell-cc-delcont
  
The .tar.gz is a zipped PKGBUILD ready to upload to AUR.
 
 
You can now inspect the PKGBUILD and install script for the library:
 
You can now inspect the PKGBUILD and install script for the library:
  
    # Contributor: Arch Haskell Team <arch-haskell@haskell.org>
+
<pre>
    # Package generated by cabal2arch 0.6.1
+
# Maintainer: My Name <my.name@domain.org>
    pkgname=haskell-cc-delcont
+
_hkgname=pandoc
    pkgrel=1
+
pkgname=haskell-pandoc
    pkgver=0.2
+
pkgver=1.6.0.1
    pkgdesc="Delimited continuations and dynamically scoped variables"
+
pkgrel=1
    url="http://hackage.haskell.org/package/CC-delcont"
+
pkgdesc="Conversion between markup formats"
    license=('custom:OtherLicense')
+
url="http://hackage.haskell.org/package/${_hkgname}"
    arch=('i686' 'x86_64')
+
license=('GPL')
    makedepends=()
+
arch=('i686' 'x86_64')
    depends=('ghc' 'haskell-cabal')
+
makedepends=()
    options=('strip')
+
depends=('ghc' 'haskell-http=4000.0.9' 'haskell-bytestring=0.9.1.7' 'haskell-containers=0.3.0.0' 'haskell-directory=1.0.1.1' 'haskell-extensible-exceptions=0.1.1.1' 'haskell-filepath=1.1.0.4' 'haskell-mtl>=1.1' 'haskell-network=2.2.1.7' 'haskell-old-time=1.0.0.5' 'haskell-parsec=2.1.0.1' 'haskell-pretty=1.0.1.1' 'haskell-process=1.0.1.3' 'haskell-random=1.0.0.2' 'haskell-syb=0.1.0.2' 'haskell-texmath<0.5' 'haskell-utf8-string>=0.3' 'haskell-xhtml=3000.2.0.1' 'haskell-xml<1.4' 'haskell-zip-archive<0.2')
    source=(http://hackage.haskell.org/packages/archive/CC-delcont/0.2/CC-delcont-0.2.tar.gz)
+
options=('strip')
    install=haskell-cc-delcont.install
+
source=(http://hackage.haskell.org/packages/archive/${_hkgname}/${pkgver}/${_hkgname}-${pkgver}.tar.gz)
    md5sums=('e52149fca9bf76330a7c159917152790')
+
install=${pkgname}.install
    build() {
+
md5sums=('d19a630462595941b3100dff6f839aa3')
        cd ${srcdir}/CC-delcont-0.2
+
build() {
        runhaskell Setup configure --prefix=/usr --docdir=/usr/share/doc/${pkgname} || return 1
+
    cd ${srcdir}/${_hkgname}-${pkgver}
        runhaskell Setup build                   || return 1
+
    runhaskell Setup configure -O --enable-split-objs --enable-shared \
        runhaskell Setup haddock || return 1
+
      --prefix=/usr --docdir=/usr/share/doc/${pkgname} --libsubdir=\$compiler/site-local/\$pkgid
        runhaskell Setup register  --gen-script || return 1
+
    runhaskell Setup build
        runhaskell Setup unregister --gen-script || return 1
+
    runhaskell Setup haddock
        install -D -m744 register.sh  ${pkgdir}/usr/share/haskell/$pkgname/register.sh
+
    runhaskell Setup register  --gen-script
        install    -m744 unregister.sh ${pkgdir}/usr/share/haskell/$pkgname/unregister.sh
+
    runhaskell Setup unregister --gen-script
        install -d -m755 $pkgdir/usr/share/doc/ghc/libraries
+
    sed -i -r -e "s|ghc-pkg.*unregister[^ ]* |&'--force' |" unregister.sh
        ln -s /usr/share/doc/${pkgname}/html ${pkgdir}/usr/share/doc/ghc/libraries/CC-delcont
+
}
        runhaskell Setup copy --destdir=${pkgdir} || return 1
+
package() {
        install -D -m644 LICENSE ${pkgdir}/usr/share/licenses/$pkgname/LICENSE || return 1
+
    cd ${srcdir}/${_hkgname}-${pkgver}
        rm -f ${pkgdir}/usr/share/doc/${pkgname}/LICENSE
+
    install -D -m744 register.sh  ${pkgdir}/usr/share/haskell/${pkgname}/register.sh
    }
+
    install    -m744 unregister.sh ${pkgdir}/usr/share/haskell/${pkgname}/unregister.sh
 +
    install -d -m755 ${pkgdir}/usr/share/doc/ghc/html/libraries
 +
    ln -s /usr/share/doc/${pkgname}/html ${pkgdir}/usr/share/doc/ghc/html/libraries/${_hkgname}
 +
    runhaskell Setup copy --destdir=${pkgdir}
 +
}
 +
</pre>
  
 
It follows the conventions for Haskell packages:
 
It follows the conventions for Haskell packages:
  
* Maintainer is by default the Arch Haskell team.
 
 
* Libraries are prefixed with "haskell-"
 
* Libraries are prefixed with "haskell-"
* "core" and "extra" Haskell libraries are not included as explicit dependencies, since ghc provides them
+
* All libraries that the package depend on are listed (libraries shipped with ghc are dealt with by having the ghc package provide them)
 
* It uses cabal to generate a post-install register/unregister script, with a standard name.
 
* It uses cabal to generate a post-install register/unregister script, with a standard name.
 
* We use haddock to build the documentation.
 
* We use haddock to build the documentation.
* Profiling versions of the library aren't currently installed (''TODO'')
 
  
All Haskell libraries should follow these naming conventions, and using the cabal2arch tool
+
All Haskell libraries should follow these naming conventions, and using the latest release of cabal2arch will ensure this is the case.
will ensure this is the case.
+
 
+
Inspect the bundle, and confirm you can build and install it:
+
 
+
    $ makepkg -s
+
    $ makepkg -i
+
 
+
And we're ready to go. Now your .tar.gz is ready to upload to AUR.
+
 
+
=== "Provides" ===
+
 
+
[http://haskell.org/haskellwiki/Arch_Linux/Preferred_Package_Tools See the discussion on the use of "provides" here].
+
 
+
===Uploading the the Haskell repository ===
+
 
+
'''This section is out of date'''
+
 
+
The following (ad hoc) script is currently used to upload packages after running cabal2arch to the respository, and keep it in sync:
+
+
#!/bin/sh
+
set -e
+
makepkg -i
+
scp *-x86_64.pkg.tar.gz code.haskell.org:/srv/code/arch/x86_64/
+
repo-add /home/dons/haskell.db.tar.gz *.pkg.tar.gz
+
rm -rf *.tar.gz pkg src
+
pwd=`pwd`
+
dir=`basename $pwd`
+
cd ..
+
scp -r $dir code.haskell.org:/srv/code/arch/x86_64/
+
scp $HOME/haskell.db.tar.gz code.haskell.org:/srv/code/arch/x86_64/
+
 
+
This is to be used by those with arch-haskell repository write permissions.
+
  
 
===Guidelines for Libraries===
 
===Guidelines for Libraries===
Line 173: Line 147:
  
 
* libraries have their cabal names prefixed with "haskell-"
 
* libraries have their cabal names prefixed with "haskell-"
* all haskell dependencies are statically linked, so can go in the makedepends field.
 
 
* all libraries have a dependency on 'ghc'
 
* all libraries have a dependency on 'ghc'
* libraries don't need to have explicit dependencies on core Haskell packages -- these come in the 'ghc' package. (e.g. array, base, containers, random,  process etc).
+
* all libraries that are depended on must be listed in the depends-array in the PKGBUILD
 
* be careful about dependencies from gtk2hs: cairo, svg, glib, gtk. These are all provided by the 'gtk2hs' package, not , e.g. "haskell-cairo"
 
* be careful about dependencies from gtk2hs: cairo, svg, glib, gtk. These are all provided by the 'gtk2hs' package, not , e.g. "haskell-cairo"
* we want to resolve dependencies with a fixed constraint to base>=3.0
 
* be careful about dependencies on the libraries provided by the basic 'ghc' package, which include:
 
  
ALUT-2.1.0.0        cgi-3001.1.5.1      network-2.1.0.0      regex-base-0.72.0.1
+
Registering Haskell libraries is done via a register hook, see above.
Cabal-1.2.3.0      containers-0.1.0.1  old-locale-1.0.0.0    regex-compat-0.71.0.1
+
GLUT-2.1.1.1        directory-1.0.0.0    old-time-1.0.0.0      regex-posix-0.72.0.2
+
HUnit-1.2.0.0      fgl-5.4.1.1          packedstring-0.1.0.0  stm-2.1.1.0
+
OpenAL-1.3.1.1      filepath-1.1.0.0    parallel-1.0.0.0      template-haskell-2.2.0.0
+
OpenGL-2.2.1.1      haskell-src-1.0.1.1  parsec-2.1.0.0        time-1.1.2.0
+
QuickCheck-1.1.0.0  haskell98-1.0.1.0    pretty-1.0.0.0        unix-2.3.0.0
+
array-0.1.0.0      hpc-0.5.0.0          process-1.0.0.0      xhtml-3000.0.2.1
+
base-3.0.1.0        html-1.0.1.1        random-1.0.0.0
+
bytestring-0.9.0.1  mtl-1.1.0.0          readline-1.0.1.0
+
 
+
These libraries don't need explicit dependencies to be set. cabal2arch solves all  these constraints for us.
+
 
+
Registering Haskell libraries is done via a register hook:
+
 
+
build() {
+
    cd ${srcdir}/cabal2arch-0.1
+
    runhaskell Setup configure --prefix=/usr || return 1
+
    runhaskell Setup build                  || return 1
+
    -- generate register scripts
+
    runhaskell Setup register  --gen-script || return 1
+
    runhaskell Setup unregister --gen-script || return 1
+
    install -D -m744 register.sh    ${pkgdir}/usr/share/haskell/$pkgname/register.sh
+
    install    -m744 unregister.sh ${pkgdir}/usr/share/haskell/$pkgname/unregister.sh
+
    runhaskell Setup copy --destdir=${pkgdir} || return 1
+
    -- usual Haskell BSD3 license isnt' official
+
    install -D -m644 LICENSE ${pkgdir}/usr/share/licenses/$pkgname/LICENSE || return 1
+
}
+
 
+
* Examples:
+
haskell-zlib, haskell-mersenne-random
+
  
 
===Guidelines for Programs ===
 
===Guidelines for Programs ===
  
* Have their normal name. Examples:
+
* Have their normal name. Examples: hmp3, xmonad, ghc, cabal-install
hmp3, xmonad, ghc, cabal-install
+
  
* Be careful about dynamically linked runtime dependencies on C. For example, all GHC-produced binaries
+
* Be careful about dynamically linked runtime dependencies on C. For example, all GHC-produced binaries have a runtime dependency on 'gmp'. OpenGL or GtT-based binaries will have additional 'depends'. cabal2arch will attempt to work out the C dependencies, but there may be others implied by Haskell dependencies that are missed.
have a runtime dependency on 'gmp'. OpenGL or GtT-based binaries will have additional 'depends'. cabal2arch will attempt to work out the C dependencies, but there may be others implied by Haskell dependencies that are missed.
+
  
 
* Use executable stripping, --enable-executable-stripping. cabal2arch will do this automatically.
 
* Use executable stripping, --enable-executable-stripping. cabal2arch will do this automatically.
 
== Haskell on Arch: current state ==
 
 
* http://www.galois.com/~dons/arch-haskell-status.html
 
 
===AUR===
 
 
There's another [http://aur.archlinux.org/packages.php?O=0&L=0&C=0&K=haskell&SB=v&SO=d&PP=100&SeB=nd&do_Orphans= > 550 Haskell packages] in AUR.
 
 
== Building all of Hackage ==
 
 
The following simple script, with cabal-install and cabal2arch installed,
 
will do a simple run over all the Haskell packages on haskell.org,
 
creating arch packages for them. Before you start it is worthwhile removing all haskell packages, and reinstalling them. And then editing your unpacked haskell package directory to remove base libraries -- you probably don't want to install them.
 
 
 
    #!/bin/sh
 
    cabal update
 
    tmpdir=`mktemp -d`
 
    finaldir=`mktemp -d`
 
    cd $tmpdir
 
    tar xzf $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz
 
    for dir in * ; do
 
        if [ ! -d $dir ] ; then
 
            continue
 
        fi
 
        cd $dir
 
        lib=`ls --color=never -1 | tail -1`
 
        echo "************** Building package for $dir-$lib"
 
        cd $lib
 
        cabal2arch *.cabal > $dir.log 2>&1
 
        cd `find . -type d -a ! -name '.'`
 
        if makepkg -sm > ../$dir.log 2>&1 ; then
 
            echo "OK: " $dir-$lib
 
            cp *.pkg.tar.gz $finaldir/
 
            sudo pacman -A *.pkg.tar.gz
 
            rm *.pkg.tar.gz
 
            rm -rf pkg src *.tar.gz
 
            cd ..
 
            cp -R `find . -type d -a ! -name '.'` $finaldir/
 
            cp *.tar.gz $finaldir/
 
        else
 
            echo "Failed"
 
        fi
 
        cd $tmpdir
 
    done
 
    echo `ls $finaldir/*pkg* | wc -l` "build packages in $finaldir"
 
    echo "Now: scp -r $finaldir/* code.haskell.org:/srv/code/arch/$MACHTYPE/"
 
  
 
== Automatic local building of Hackage Packages with cabal2arch using Bauerbill ==
 
== Automatic local building of Hackage Packages with cabal2arch using Bauerbill ==
 +
{{Warning|''Bauerbill'' development has been officially discontinued: its latest version does not work with ''pacman>&#61;3.5''. See [https://bbs.archlinux.org/viewtopic.php?id&#61;115660].}}
 
Although there are a number of haskell packages on AUR, there will always be outdated packages on AUR. If this happens and you want to create a fully updated package you would normally use cabal2arch. This however can become painful/time consuming if you have numerous packages with different dependencies (some of which may/may not be updated). Instead you can automatic this process by using [[Bauerbill]] which has the --hackage flag, allowing you to create AUR packages from Hackage locally. Below is an example of some common commands
 
Although there are a number of haskell packages on AUR, there will always be outdated packages on AUR. If this happens and you want to create a fully updated package you would normally use cabal2arch. This however can become painful/time consuming if you have numerous packages with different dependencies (some of which may/may not be updated). Instead you can automatic this process by using [[Bauerbill]] which has the --hackage flag, allowing you to create AUR packages from Hackage locally. Below is an example of some common commands
  

Revision as of 10:48, 26 March 2011


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Haskell on Arch Linux

Haskell is well supported on Arch Linux, with GHC and other key tools available via pacman, a growing number of packages made available by the ArchHaskell group, and a large part of hackage.haskell.org library database available via AUR.

The community around Haskell on Arch is active and well organized but your help is always welcome.

Community

All the details on the ArchHaskell group is available on its own page.

Haskell Packages

The core Haskell tools are available in the core system (extra):

[Extra]

Our policy is for [extra] to provide the Haskell platform, and popular Haskell applications.

[haskell]

The packages maintained by the ArchHaskell group can be accessed by adding the following entry to pacman.conf:

[haskell]
Server = http://andromeda.kiwilight.com/$repo/$arch

AUR

A huge number (almost 2000) packages built from http://hackage.haskell.org

These generally improve on installing directly from Hackage as they resolve required C libraries. They can be installed as, for example:

   sudo paktahn -S haskell-csv

Anything not found here can be installed via cabal-install direct from Hackage.

Guidelines

In almost all cases cabalised Haskell packages can be automatically translated into Arch packages, via the cabal2arch tool. It is strongly recommended that you use the latest released version of this tool, as it implements the packaging policy for Haskell packages. You can get it in several ways:

  • Add the [haskell] repository to pacman.conf and use pacman do install the latest release.
  • Download and build the source from AUR, either manually or using one of the many AUR Helpers.
  • Install directly from Hackage using "cabal install cabal2arch".

cabal2arch: an example

This example illustrates how to create a new package with cabal2arch. We'll make a new package for the delimited continuations library, CC-delcont:

First, set the name and email address to be used in the generated PKGBUILD:

export ARCH_HASKELL='My Name <my.name@domain.org>'

Second, find the hackage page for CC-delcont, then identify the link to the .cabal file. Use this link as an argument to cabal2arch:

% cd /tmp
% cabal2arch http://hackage.haskell.org/packages/archive/pandoc/1.6.0.1/pandoc.cabal
Using /tmp/tmp.x9SEhTJ8N9/pandoc.cabal
Feeding the PKGBUILD to `makepkg -g`...
==> Retrieving Sources...
  -> Downloading pandoc-1.6.0.1.tar.gz...
--2011-01-30 22:12:18--  http://hackage.haskell.org/packages/archive/pandoc/1.6.0.1/pandoc-1.6.0.1.tar.gz
Resolving hackage.haskell.org... 69.30.63.204
Connecting to hackage.haskell.org|69.30.63.204|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 355477 (347K) [application/x-tar]
Saving to: `pandoc-1.6.0.1.tar.gz.part'

     0K .......... .......... .......... .......... .......... 14% 20.3K 15s
    50K .......... .......... .......... .......... .......... 28% 40.3K 9s
   100K .......... .......... .......... .......... .......... 43% 53.0K 6s
   150K .......... .......... .......... .......... .......... 57% 58.2K 4s
   200K .......... .......... .......... .......... .......... 72% 57.7K 2s
   250K .......... .......... .......... .......... .......... 86% 67.1K 1s
   300K .......... .......... .......... .......... .......   100% 76.4K=7.7s

2011-01-30 22:12:27 (44.9 KB/s) - `pandoc-1.6.0.1.tar.gz.part' saved [355477/355477]

==> Generating checksums for source files...

Checking what was created:

% ls
haskell-cc-delcont

You can now inspect the PKGBUILD and install script for the library:

# Maintainer: My Name <my.name@domain.org>
_hkgname=pandoc
pkgname=haskell-pandoc
pkgver=1.6.0.1
pkgrel=1
pkgdesc="Conversion between markup formats"
url="http://hackage.haskell.org/package/${_hkgname}"
license=('GPL')
arch=('i686' 'x86_64')
makedepends=()
depends=('ghc' 'haskell-http=4000.0.9' 'haskell-bytestring=0.9.1.7' 'haskell-containers=0.3.0.0' 'haskell-directory=1.0.1.1' 'haskell-extensible-exceptions=0.1.1.1' 'haskell-filepath=1.1.0.4' 'haskell-mtl>=1.1' 'haskell-network=2.2.1.7' 'haskell-old-time=1.0.0.5' 'haskell-parsec=2.1.0.1' 'haskell-pretty=1.0.1.1' 'haskell-process=1.0.1.3' 'haskell-random=1.0.0.2' 'haskell-syb=0.1.0.2' 'haskell-texmath<0.5' 'haskell-utf8-string>=0.3' 'haskell-xhtml=3000.2.0.1' 'haskell-xml<1.4' 'haskell-zip-archive<0.2')
options=('strip')
source=(http://hackage.haskell.org/packages/archive/${_hkgname}/${pkgver}/${_hkgname}-${pkgver}.tar.gz)
install=${pkgname}.install
md5sums=('d19a630462595941b3100dff6f839aa3')
build() {
    cd ${srcdir}/${_hkgname}-${pkgver}
    runhaskell Setup configure -O --enable-split-objs --enable-shared \
       --prefix=/usr --docdir=/usr/share/doc/${pkgname} --libsubdir=\$compiler/site-local/\$pkgid
    runhaskell Setup build
    runhaskell Setup haddock
    runhaskell Setup register   --gen-script
    runhaskell Setup unregister --gen-script
    sed -i -r -e "s|ghc-pkg.*unregister[^ ]* |&'--force' |" unregister.sh
}
package() {
    cd ${srcdir}/${_hkgname}-${pkgver}
    install -D -m744 register.sh   ${pkgdir}/usr/share/haskell/${pkgname}/register.sh
    install    -m744 unregister.sh ${pkgdir}/usr/share/haskell/${pkgname}/unregister.sh
    install -d -m755 ${pkgdir}/usr/share/doc/ghc/html/libraries
    ln -s /usr/share/doc/${pkgname}/html ${pkgdir}/usr/share/doc/ghc/html/libraries/${_hkgname}
    runhaskell Setup copy --destdir=${pkgdir}
}

It follows the conventions for Haskell packages:

  • Libraries are prefixed with "haskell-"
  • All libraries that the package depend on are listed (libraries shipped with ghc are dealt with by having the ghc package provide them)
  • It uses cabal to generate a post-install register/unregister script, with a standard name.
  • We use haddock to build the documentation.

All Haskell libraries should follow these naming conventions, and using the latest release of cabal2arch will ensure this is the case.

Guidelines for Libraries

In general, each .cabal file should map to one PKGBUILD. The following conventions hold:

  • libraries have their cabal names prefixed with "haskell-"
  • all libraries have a dependency on 'ghc'
  • all libraries that are depended on must be listed in the depends-array in the PKGBUILD
  • be careful about dependencies from gtk2hs: cairo, svg, glib, gtk. These are all provided by the 'gtk2hs' package, not , e.g. "haskell-cairo"

Registering Haskell libraries is done via a register hook, see above.

Guidelines for Programs

  • Have their normal name. Examples: hmp3, xmonad, ghc, cabal-install
  • Be careful about dynamically linked runtime dependencies on C. For example, all GHC-produced binaries have a runtime dependency on 'gmp'. OpenGL or GtT-based binaries will have additional 'depends'. cabal2arch will attempt to work out the C dependencies, but there may be others implied by Haskell dependencies that are missed.
  • Use executable stripping, --enable-executable-stripping. cabal2arch will do this automatically.

Automatic local building of Hackage Packages with cabal2arch using Bauerbill

Warning: Bauerbill development has been officially discontinued: its latest version does not work with pacman>=3.5. See [1].

Although there are a number of haskell packages on AUR, there will always be outdated packages on AUR. If this happens and you want to create a fully updated package you would normally use cabal2arch. This however can become painful/time consuming if you have numerous packages with different dependencies (some of which may/may not be updated). Instead you can automatic this process by using Bauerbill which has the --hackage flag, allowing you to create AUR packages from Hackage locally. Below is an example of some common commands

   bauerbill -S --hackage [pkgs] : build [pkgs] directly from Hackage*
   bauerbill -Si --hackage [pkgs] : look up information about [pkgs]
   bauerbill -Ss --hackage [args] : search for [args]
   bauerbill -Qu --hackage : list upgradable Hackage packages

Syncing packages with the --hackage flag will interactively download all dependencies of the package from Hackage, convert them using cabal2arch and then build/install them (while checking dependencies). You can combine this with the --aur flag to give precedence to Hackage packages that are on AUR