このインポートを haskell で動作させることができません。
import Network.HTTP.Conduit
コンパイルしようとすると、次のエラーが発生します。
$ ghc Play.hs
Play.hs:1:8:
Could not find module `Network.HTTP.Conduit'
Use -v to see a list of the files searched for.
GHCI でファイルを読み込もうとすると、同じエラーが発生します。
cabal 経由で http-conduit の最新バージョンをインストールしました。cabal からの出力は次のとおりです。
$ cabal -list http-conduit
* http-conduit
Synopsis: HTTP client package with conduit interface and HTTPS support.
Default available version: 1.8.2
Installed versions: 1.6.0.4, 1.8.2
Homepage: http://www.yesodweb.com/book/http-conduit
License: BSD3
* http-conduit-browser
Synopsis: Browser interface to the http-conduit package
Default available version: 1.6.3
Installed versions: 1.6.3
Homepage: https://github.com/exbb2/http-conduit-browser
License: BSD3
違いがある場合は、Ubuntu 12.04 を使用しています。
これがインポートされない理由はありますか?
編集:「ghc-pkg リスト」からの出力:
$ ghc-pkg list http-conduit
WARNING: there are broken packages. Run 'ghc-pkg check' for more details.
/var/lib/ghc/package.conf.d
http-conduit-1.6.0.4
http-conduit-1.8.2
~/.ghc/i386-linux-7.4.1/package.conf.d
そして「ghc-pkg check」から:
$ ghc-pkg check
The following packages are broken, either because they have a problem
listed above, or because they depend on a broken package.
derive-2.5.11
derive-2.5.11
peakachu-0.3.0
peakachu-0.3.0
「ghc-pkg unregister serve-2.5.11」と「ghc-pkg unregister peakachu-0.3.0」を実行した後、「ghc-pkg list http-conduit」からの警告は発生しなくなりましたが、問題は修正されていません。
「ghc-pkg check」の stderr から:
Warning: haddock-interfaces: /usr/local/share/doc/http-conduit-browser-1.6.3/html/http-conduit-browser.haddock doesn't exist or isn't a file
Warning: haddock-html: /usr/local/share/doc/http-conduit-browser-1.6.3/html doesn't exist or isn't a directory
Warning: haddock-interfaces: /usr/local/share/doc/http-conduit-1.8.2/html/http conduit.haddock doesn't exist or isn't a file
Warning: haddock-html: /usr/local/share/doc/http-conduit-1.8.2/html doesn't exist or isn't a directory
「-package http-conduit」でコンパイルした場合の出力:
$ ghc -package http-conduit Play.hs -v
<command line>: cannot satisfy -package http-conduit:
http-conduit-1.8.2-13f7764675fbae0ac9de8bcf7925f78e is unusable due to missing or recursive dependencies:
asn1-data-0.7.1-cb75ffc05237f33632b42d2fb76a7a29 attoparsec-conduit-0.5.0.1-5fe0cc7293ce100ae00db2d7e67f682f blaze-builder-conduit-0.5.0.1-59a72b475661fd25bd4619f58e8b40de certificate-1.3.1-dd3ba477e9b28bd6e4ab3d8865f22a87 conduit-0.5.2.4-88846c185b7e5037f242975916feb7e2 failure-0.2.0.1-49a74d2d91efe8118b3ce4233a86c2be lifted-base-0.1.2-1905d9349e322d5bbdfc585c7291efe4 monad-control-0.3.1.4-2629785f64d5c6eb4b6a72e854127870 network-2.4.0.1-53e0509d073f1b67ec3e641af74cb551 resourcet-0.4.0.1-07b5b503a019bd31b56feec9c26dfaec tls-1.0.1-f578324e807426668353637611a71070 tls-extra-0.5.0-459144227bb52a8255b4a149f58f3520 transformers-base-0.4.1-d27396afe6939ffd84456ceebf04bfbb zlib-conduit-0.5.0.1-f6b2f2e99cffe03ace3d731c20826f12
http-conduit-1.6.0.4-963a389e596e9c9f7c021dc97238cc52 is unusable due to missing or recursive dependencies:
asn1-data-0.7.1-cb75ffc05237f33632b42d2fb76a7a29 attoparsec-conduit-0.5.0.1-5fe0cc7293ce100ae00db2d7e67f682f blaze-builder-conduit-0.5.0.1-59a72b475661fd25bd4619f58e8b40de certificate-1.2.8-78aa58c1d97c0315f599845cf7924ae2 conduit-0.5.2.4-88846c185b7e5037f242975916feb7e2 failure-0.2.0.1-49a74d2d91efe8118b3ce4233a86c2be lifted-base-0.1.2-1905d9349e322d5bbdfc585c7291efe4 monad-control-0.3.1.4-2629785f64d5c6eb4b6a72e854127870 network-2.4.0.1-53e0509d073f1b67ec3e641af74cb551 resourcet-0.4.0.1-07b5b503a019bd31b56feec9c26dfaec tls-0.9.10-bedda6ba89d62d8b86895a07b0d4437e tls-extra-0.4.6-e10848dbad24b59704ecb96d86e5362a transformers-base-0.4.1-d27396afe6939ffd84456ceebf04bfbb zlib-conduit-0.5.0.1-f6b2f2e99cffe03ace3d731c20826f12
すべての依存関係がリストされているようです。「カバールリスト」からの出力は次のとおりです
* asn1-data
Synopsis: ASN1 data reader and writer in RAW, BER and DER forms
Default available version: 0.7.1
Installed versions: 0.7.1
Homepage: http://github.com/vincenthz/hs-asn1-data
License: BSD3
* attoparsec-conduit
Synopsis: Consume attoparsec parsers via conduit.
Default available version: 0.5.0.2
Installed versions: 0.5.0.1
Homepage: http://github.com/snoyberg/conduit
License: BSD3
* blaze-builder-conduit
Synopsis: Convert streams of builders to streams of bytestrings.
Default available version: 0.5.0.1
Installed versions: 0.5.0.1
Homepage: http://github.com/snoyberg/conduit
License: BSD3
* certificate
Synopsis: Certificates and Key Reader/Writer
Default available version: 1.3.1
Installed versions: 1.2.8, 1.3.1
Homepage: http://github.com/vincenthz/hs-certificate
License: BSD3
* conduit
Synopsis: Streaming data processing library.
Default available version: 0.5.2.7
Installed versions: 0.5.2.4
Homepage: http://github.com/snoyberg/conduit
License: BSD3
* failure
Synopsis: A simple type class for success/failure computations.
Default available version: 0.2.0.1
Installed versions: 0.2.0.1
Homepage: http://www.haskell.org/haskellwiki/Failure
License: BSD3
* lifted-base
Synopsis: lifted IO operations from the base library
Default available version: 0.2
Installed versions: 0.1.2
Homepage: https://github.com/basvandijk/lifted-base
License: BSD3
* monad-control
Synopsis: Lift control operations, like exception catching, through monad
transformers
Default available version: 0.3.1.4
Installed versions: 0.3.1.4
Homepage: https://github.com/basvandijk/monad-control
License: BSD3
* network
Synopsis: Low-level networking interface
Default available version: 2.4.0.1
Installed versions: 2.4.0.1
Homepage: https://github.com/haskell/network
License: BSD3
* resourcet
Synopsis: Deterministic allocation and freeing of scarce resources.
Default available version: 0.4.0.2
Installed versions: 0.4.0.1
Homepage: http://github.com/snoyberg/conduit
License: BSD3
* tls
Synopsis: TLS/SSL protocol native implementation (Server and Client)
Default available version: 1.0.1
Installed versions: 0.9.10, 1.0.1
Homepage: http://github.com/vincenthz/hs-tls
License: BSD3
* tls-extra
Synopsis: TLS extra default values and helpers
Default available version: 0.5.0
Installed versions: 0.4.6, 0.4.6, 0.5.0, 0.5.0
Homepage: http://github.com/vincenthz/hs-tls
License: BSD3
* transformers-base
Synopsis: Lift computations from the bottom of a transformer stack
Default available version: 0.4.1
Installed versions: 0.4.1
Homepage: https://github.com/mvv/transformers-base
License: BSD3
* zlib-conduit
Synopsis: Streaming compression/decompression via conduits.
Default available version: 0.5.0.1
Installed versions: 0.5.0.1
Homepage: http://github.com/snoyberg/conduit
License: BSD3
これは、「ghc-pkg list xxxx」からの出力です。xxxx は、「-package http-conduit」フラグを使用してコンパイルした結果の依存関係リスト内の各パッケージです。
/var/lib/ghc/package.conf.d:
asn1-data-0.7.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
attoparsec-conduit-0.5.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
blaze-builder-conduit-0.5.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
certificate-1.2.8
certificate-1.3.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
conduit-0.5.2.4
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
failure-0.2.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
failure-0.2.0.1
/var/lib/ghc/package.conf.d:
lifted-base-0.1.2
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
monad-control-0.3.1.4
~/.ghc/i386-linux-7.4.1/package.conf.d:
monad-control-0.3.1.4
/var/lib/ghc/package.conf.d:
network-2.4.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
network-2.4.0.1
/var/lib/ghc/package.conf.d:
resourcet-0.4.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
tls-0.9.10
tls-1.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
tls-extra-0.4.6
tls-extra-0.5.0
~/.ghc/i386-linux-7.4.1/package.conf.d:
/var/lib/ghc/package.conf.d:
transformers-base-0.4.1
~/.ghc/i386-linux-7.4.1/package.conf.d:
transformers-base-0.4.1
/var/lib/ghc/package.conf.d:
zlib-conduit-0.5.0.1
~/.ghc/i386-linux-7.4.1/package.conf.d: