从堆栈安装ghcjs

Question

我通过堆栈安装stack ghc -- --version了GHC (因此显示GHC-7.10.3)

$ stack install ghcjs

Run from outside a project, using implicit global project config
Using resolver: lts-5.2 from implicit global project's config file: /home/john/.stack/global-project/stack.yaml
The following target packages were not found: ghcjs

一些资源建议ghcjs有点实验性(尽管在后续阶段).

---

看看http://docs.haskellstack.org/en/stable/ghcjs/我想也许我可以找到stack.yaml并改变它.

要使用堆栈> = 0.1.8的GHCJS,将GHCJS版本放在stack.yaml的编译器字段中......然后 stack setup

$ cat ~/.stack/global-project/stack.yaml
# This is the implicit global project's config file, which is only used when
# 'stack' is run outside of a real project.  Settings here do _not_ act as
# defaults for all projects.  To change stack's default settings, edit
# '/home/john/.stack/config.yaml' instead.
#
# For more information about stack's configuration, see
# http://docs.haskellstack.org/en/stable/yaml_configuration.html
#
flags: {}
extra-package-dbs: []
packages: []
extra-deps: []
resolver: lts-5.2

我们被告知看看config.yaml哪个看起来同样空白.这是否正确,我是否会走向死胡同？

$ cat ~/.stack/config.yaml
# This file contains default non-project-specific settings for 'stack', used
# in all projects.  For more information about stack's configuration, see
# http://docs.haskellstack.org/en/stable/yaml_configuration.html
#
{}

我只想ghcjs用堆栈安装.

Answer 1

看看这个页面:http://docs.haskellstack.org/en/stable/ghcjs/

我会尝试:

1. 启动一个新的堆栈项目,例如 stack new js-test

2. 通过添加此节来修改stack.yaml文件(取自上面提到的链接):

   compiler: ghcjs-0.2.0.20160414_ghc-7.10.3
   compiler-check: match-exact
   setup-info:
     ghcjs:
       source:
         ghcjs-0.2.0.20160414_ghc-7.10.3:
           url: https://s3.amazonaws.com/ghcjs/ghcjs-0.2.0.20160414_ghc-7.10.3.tar.gz
           sha1: 6d6f307503be9e94e0c96ef1308c7cf224d06be3
   

3. 更改resolver:为lts-5.12 - 这与上面的节相匹配.

4. 运行stack setup以安装编译器.

第4步需要一段时间.