使用Haskell工具堆栈初始化新的GHCJS项目

Question

使用Haskell初始化GHCJS项目需要做什么？

在堆栈文档之后，我尝试初始化一个GHCJS项目，以便将Haskell代码编译成JavaScript。

在执行stack templates之后，我看到有一个GHCJS模板

ghcjs - Haskell to JavaScript compiler, based on GHC

当我尝试在这个模板中使用新命令时，如下所示：

stack new ghcjsSetup ghcjs

我收到以下错误消息：

Downloading template "ghcjs" to create project "ghcjsSetup" in ghcjsSetup/ ...

The following parameters were needed by the template but not provided: author-email, author-name, category, copyright, github-username
You can provide them in /home/u/.stack/config.yaml, like this:
templates:
  params:
    author-email: value
    author-name: value
    category: value
    copyright: value
    github-username: value
Or you can pass each one as parameters like this:
stack new ghcjsSetup ghcjs -p "author-email:value" -p "author-name:value" -p "category:value" -p "copyright:value" -p "github-username:value"

Looking for .cabal or package.yaml files to use to init the project.
Using cabal packages:
- ghcjsSetup/ghcjsSetup.cabal

Selecting the best among 11 snapshots...

* Partially matches lts-9.11
    ghcjs-base not found
        - ghcjsSetup requires -any

Downloaded nightly-2017-11-01 build plan.    
Unable to parse cabal file: FromString "This package requires at least Cabal version 2.0" Nothing

Answer 1

我最近也犯了同样的错误。显然，你有一个旧版本的stack。您需要将其升级到>= 1.5.1版本。发生此错误是因为我认为Cabal ver. 2.0中的某些文件格式发生了更改。