如何减少 .cabal 文件的 build-depends 字段中的重复? [英] How to reduce duplication in the build-depends fields of a .cabal file?

问题描述

这是一个 .cabal 文件:

Here's a .cabal file:

Name:                myprogram
Version:             0.1
-- blah blah blah
Cabal-version:       >=1.9.2

Executable myprogram
  HS-source-dirs:       src
  Main-is:              Main.hs
  Build-depends:        attoparsec == 0.10.*,
                        base == 4.3.*,
                        -- long long list of packages

Test-Suite test
  HS-source-dirs:       test, src
  Type:                 exitcode-stdio-1.0
  Main-is:              Main.hs
  Build-depends:        attoparsec == 0.10.*,
                        base == 4.3.*,
                        -- long long list of packages
                        QuickCheck == 2.4.*

有什么办法可以用与可执行文件相同，加上 QuickCheck"替换测试套件的一长串依赖于构建的包?

Is there any way I can replace the long list of build-depends packages for the test suite with "same as for the executable, plus QuickCheck"?

版本信息.

• cabal-dev 0.9
• cabal 安装 0.10.2
• Cabal 库 1.10.2.0
• GHC 7.0.4
• Haskell 平台 2011.4.0.0

推荐答案

自 2.2 版 Cabal 支持通用节以来，删除构建信息字段:https://cabal.readthedocs.io/en/latest/developing-packages.html#common-stanzas

Since version 2.2 Cabal supports common stanzas, to dedup build info fields: https://cabal.readthedocs.io/en/latest/developing-packages.html#common-stanzas

cabal-version:       2.2
name:                myprogram
version:             0.1
-- blah blah blah

common deps
  build-depends: base ^>= 4.11,
                 -- long long list of packages
  ghc-options: -Wall

library
  import: deps
  exposed-modules: Foo

test-suite tests
  import: deps
  type: exitcode-stdio-1.0
  main-is: Tests.hs
  build-depends: foo

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