- cabal-devel - Haskell.org

ANNOUNCE: Cabal 1.4
by Duncan Coutts 18 Jun '08

18 Jun '08

Cabal 1.4 ========= Cabal version 1.4 is out: http://haskell.org/cabal/download.html The user guide and API documentation are also available from the download page. You can also get it from hackage: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/Cabal Release notes ============= There are no huge new features in the Cabal library itself, though there are a number of incremental improvements and lots of bug fixes. The main new feature is that is supports a significantly improved version of cabal-install. You can see a summary of the changes in the change log: http://haskell.org/cabal/release/latest/changelog A few items in particular are changes in existing behaviour: * All .cabal files are treated as UTF-8 and must be valid * Stricter parsing for version strings, eg disallows "1.05" * Default prefix for --user installs is now $HOME/.cabal Compatibility ------------- We have tried to preserve compatibility with all packages that worked with the Cabal-1.2.x series. That is, packages that can be built using Cabal (including custom Setup.hs scripts) but not packages that directly import and use the Cabal API. Packages that directly import and use the Cabal api will need updating. This affects packages that build distro packages for example, rpm debs etc. Bugs and feature requests ------------------------- This is an excellent opportunity to make sure your favourite bug or feature request is properly described in our bug tracker: http://hackage.haskell.org/trac/hackage/ To help us guide development priorities please add yourself to the ticket's cc list and describe why that bug or feature is important to you. Credits ======= On behalf of the Cabal hackers and the community generally I'd like to thank the large number of people who have contributed patches during this development series. Previously I was rather worried that we were not getting enough contributors to fix bugs and do new feature development, but now I'm very pleased. Get involved ============ Of course there's still a lot to do! We have big plans for Cabal-2.0, cabal-install and the Hackage website. So if you're interested in helping out with this core infrastructure project then: * subscribe to the cabal-devel mailing list: http://www.haskell.org/mailman/listinfo/cabal-devel * grab the source: http://haskell.org/cabal/code.html * read the guide to the source code: http://hackage.haskell.org/trac/hackage/wiki/SourceGuide * take a look at our list of bugs and feature requests: http://hackage.haskell.org/trac/hackage/report/12 especially the easy tickets: http://hackage.haskell.org/trac/hackage/report/13 Duncan

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Cabal uses incorrect proxy settings
by Neil Mitchell 17 Jun '08

17 Jun '08

Hi, I just tried: C:\Neil\hoogle>cabal update Downloading package list from server 'http://hackage.haskell.org/packages/archive' Warning: invalid http proxy uri: "wwwcache.sns.york.ac.uk:8080" Warning: proxy uri must be http with a hostname Warning: ignoring http proxy, trying a direct connection Obviously it tried to go via the York cache, which is wrong. So I checked the IE proxy settings, and found the attached screenshot. i.e. the settings are as mentioned, but the checkbox to use those settings is disabled. If you tell me which bit of the registry this gets read from, I'll happily copy those keys. Thanks Neil

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patch applied (cabal-install): Default to global installs on Windows
by Duncan Coutts 16 Jun '08

16 Jun '08

Mon Jun 16 15:38:47 PDT 2008 Duncan Coutts <duncan(a)haskell.org> * Default to global installs on Windows User installs by default elsewhere. Note that this default only affects new config files. Existing windows users will need to change their config file or delete it and let it be re-created. M ./Hackage/Config.hs -9 +18 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080616223847-adfee-…

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Cabal install performs worse on Hugs
by Neil Mitchell 16 Jun '08

16 Jun '08

Hi, Using Cabal 1.4 Branch and Cabal-install HEAD: C:\Neil\uniplate>cabal install --hugs Resolving dependencies... cabal: internal error: could not construct a valid install plan. The proposed (invalid) plan contained the following problems: Package uniplate-1.1 has an invalid configuration, in particular: the package has a dependency base >=3 but no package has been selected to sati sfy it. the package has a dependency containers -any but no package has been selected to satisfy it. the package has a dependency mtl -any but no package has been selected to sati sfy it. But doing it the old way: C:\Neil\uniplate>runhaskell Setup configure --hugs Configuring uniplate-1.1... C:\Neil\uniplate>runhaskell Setup build Preprocessing library uniplate-1.1... Building uniplate-1.1... C:\Neil\uniplate>runhaskell Setup install Installing: C:\Program Files\Haskell\hugs\packages\uniplate Registering uniplate-1.1... It seems like if cabal install is incapable of doing anything good on Hugs, it should at least try to see if it works already. Thanks Neil

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Misplacement of installed binaries
by Neil Mitchell 16 Jun '08

16 Jun '08

Hi, Using Cabal-1.4 and cabal-install head, installing cabal-install puts the binary at: "C:\Documents and Settings\Administrator\Application Data\cabal\bin" That seems like a bad choice of location for installed program files on Windows. Application Data is not for putting binaries into. It is installing programs, and they should go in C:\Program Files\Haskell\bin, as they did with Cabal-1.2. Is there a reason for changing the install location on Windows? Thanks Neil

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Depsolver won't install some installable packages
by Darrin Thompson 16 Jun '08

16 Jun '08

Is this buggy behavior? Installing yi... ... setup: alex version >=2.0.1 && <3 is required but it could not be found. cabal: Error: some packages failed to install: yi-0.3 failed during the configure step. The exception was: exit: ExitFailure 1 $ cabal install alex Resolving dependencies... Downloading alex-2.2... [1 of 1] Compiling Main ( Setup.lhs, dist/setup/Main.o ) ... I observed similar behavior with happs depending on happy. I had to issue an install command for happy and then happs-hsp-template installed. I would guess that what alex and happy have in common is that they are indirect (second order?) dependencies of the user's specified package. Pure speculation on my part. -- Darrin

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patch applied (cabal-install): Overhaul the bogus dependency resolver so it works again
by Duncan Coutts 16 Jun '08

16 Jun '08

Mon Jun 16 10:55:11 PDT 2008 Duncan Coutts <duncan(a)haskell.org> * Overhaul the bogus dependency resolver so it works again The bogusResolver is used for compilers like hugs and nhc98 where we do not know what packages are already installed. We do it by altering the descriptions of the packages we're going to install to remove all of their dependencies. Doing this gives us a valid install plan. We rely on hope to minimise the difference between this install plan and reality. M ./Hackage/Dependency/Bogus.hs -24 +60 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080616175511-adfee-…

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patch applied (cabal-install): Use standard thisPackageVersion rather than inlined definition
by Duncan Coutts 16 Jun '08

16 Jun '08

Mon Jun 16 10:32:53 PDT 2008 Duncan Coutts <duncan(a)haskell.org> * Use standard thisPackageVersion rather than inlined definition M ./Hackage/Install.hs -5 +3 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080616173253-adfee-…

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patch applied (cabal-install): Move getAvailablePackages into IndexUtils module
by Duncan Coutts 16 Jun '08

16 Jun '08

Mon Jun 16 10:12:55 PDT 2008 Duncan Coutts <duncan(a)haskell.org> * Move getAvailablePackages into IndexUtils module M ./Hackage/Fetch.hs -3 +3 M ./Hackage/IndexUtils.hs -2 +12 M ./Hackage/Install.hs -3 +3 M ./Hackage/List.hs -3 +2 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080616171255-adfee-…

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patch applied (cabal-install): Try and pick up the http proxy on windows correctly
by Duncan Coutts 16 Jun '08

16 Jun '08

Mon Jun 16 10:03:12 PDT 2008 Duncan Coutts <duncan(a)haskell.org> * Try and pick up the http proxy on windows correctly Takes account of the ProxyEnabled reg key Allow proxy uris that lack the http:// uri schema. This should really be moved into the HTTP package. M ./Hackage/HttpUtils.hs -20 +60 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080616170312-adfee-…

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