Haskell doctest不加载用cabal-dev管理的包

Question

我正在尝试测试我的项目，它使用了"data-binary-ieee754“和doctest。

我使用cabal dev而不是cabal来管理包依赖关系。我可以构建项目，但doctest似乎无法识别该包。

文档测试.cabal中的定义：

test-suite doctests
  type:            exitcode-stdio-1.0
  hs-source-dirs:  test
  main-is:         doctests.hs
  ghc-options:     -Wall -threaded
  build-depends:   base,
                   doctest >= 0.7,
                   data-binary-ieee754

test/doctests.hs：

module Main where

import Test.DocTest

main :: IO ()
main = doctest ["src/Pattern.hs"]

cabal-dev test doctests的错误消息为：

Running 1 test suites...
Test suite doctests: RUNNING...

src/Pattern.hs:13:8:
    Could not find module `Data.Binary.IEEE754'
    Use -v to see a list of the files searched for.
Test suite doctests: FAIL
Test suite logged to: dist/test/othello-0.1.0-doctests.log
0 of 1 test suites (0 of 1 test cases) passed.

我尝试向doctests.hs添加一些选项，例如

main = doctest ["--optghc=-Lcabal-dev/lib",
                "--optghc=-packagedata-binary-ieee754",
                "src/Pattern.hs"]

但结果是

Running 1 test suites...
Test suite doctests: RUNNING...
doctests: <command line>: cannot satisfy -package data-binary-ieee754
    (use -v for more information)
Test suite doctests: FAIL
Test suite logged to: dist/test/othello-0.1.0-doctests.log
0 of 1 test suites (0 of 1 test cases) passed.

请告诉我如何正确完成此操作。谢谢。

Answer 1

我自己找到了答案。

http://hackage.haskell.org/trac/ghc/ticket/6133很有帮助。

main :: IO ()
main = doctest ["--optghc=-Lcabal-dev/lib",
                "--optghc=-packagedata-binary-ieee754",
                "--optghc=-package-conf=cabal-dev/packages-7.4.1.conf",
                "src/Pattern.hs"]

Answer 2

稍微更新一下这个答案，doctest现在允许您直接调用ghc选项。

您还可以加载沙箱包数据库并从cabal调用。

doctest [ "-package-db .cabal-sandbox/x86_64-linux-ghc-7.10.3-packages.conf.d"
        , "-isrc"
        , "src/<path-to-file>"]

这为我解决了缺少包的问题。