Haskell在vscode中（使用WSL2），断点没有被触发。

huangapple
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英文:

Haskell in vscode (with WSL2), breakpoints not being hit

问题

我想开始学习Haskell，而VSCode似乎是一个不错的集成开发环境。我尝试进行设置。

我尝试了以下步骤：

我进入了WSL2（Ubuntu 20.04.6）中我想要工作的目录，并从那里执行了code .。这将在给定的文件夹中打开VSCode，然后我使用以下命令创建了一个Haskell项目：

  1. stack new my-project
  2. cd my-project
  3. stack setup

然后我使用stack build构建了项目。

接下来，我下载了扩展Haskell语言支持。
然后我下载了扩展Haskell GHCi Debug Adapter Phoityne，并按照以下说明执行：

  1. stack install haskell-dap ghci-dap haskell-debug-adapter

最后，我在VSCode的Run and Debug选项卡下，点击create a launch.json file并选择haskell-debug-adapter。这将在*.vscode文件夹下创建launch.json*文件。

  1. {
  2.     "version": "0.2.0",
  3.     "configurations": [
  4.         {
  5.             "type": "ghc",
  6.             "request": "launch",
  7.             "name": "haskell(stack)",
  8.             "internalConsoleOptions": "openOnSessionStart",
  9.             "workspace": "${workspaceFolder}",
  10.             "startup": "${workspaceFolder}/test/Spec.hs",
  11.             "startupFunc": "",
  12.             "startupArgs": "",
  13.             "stopOnEntry": false,
  14.             "mainArgs": "",
  15.             "ghciPrompt": "H>>= ",
  16.             "ghciInitialPrompt": "> ",
  17.             "ghciCmd": "stack ghci --with-ghc=ghci-dap --test --no-load --no-build --main-is TARGET",
  18.             "ghciEnv": {},
  19.             "logFile": "${workspaceFolder}/.vscode/phoityne.log",
  20.             "logLevel": "WARNING",
  21.             "forceInspect": false
  22.         },
  23.         {
  24.             "type": "ghc",
  25.             "request": "launch",
  26.             "name": "haskell(cabal)",
  27.             "internalConsoleOptions": "openOnSessionStart",
  28.             "workspace": "${workspaceFolder}",
  29.             "startup": "${workspaceFolder}/app/Main.hs",
  30.             "startupFunc": "",
  31.             "startupArgs": "",
  32.             "stopOnEntry": false,
  33.             "mainArgs": "",
  34.             "ghciPrompt": "H>>= ",
  35.             "ghciInitialPrompt": "> ",
  36.             "ghciCmd": "cabal repl -w ghci-dap --repl-no-load --builddir=${workspaceFolder}/.vscode/dist-cabal-repl",
  37.             "ghciEnv": {},
  38.             "logFile": "${workspaceFolder}/.vscode/phoityne.log",
  39.             "logLevel": "WARNING",
  40.             "forceInspect": false
  41.         }
  42.     ]
  43. }

从这个文件中看，似乎{workspaceFolder}/test/Spec.hs是启动的入口点。这个文件包含：

  1. main :: IO ()
  2. main = putStrLn "Test suite not yet implemented"

我在这两行上设置了断点，然后点击了Haskell（stack）配置的绿色播放按钮。

但是，这似乎没有任何作用。它只加载了几秒钟，终端上没有打印任何内容，断点也没有触发。有人知道我做错了什么吗？

英文:

I would like to start learning haskell and it seems vscode would be a decent IDE for this. I tried to set it up.

I tried the following :

I went into WSL2(ubuntu 20.04.6) in the directory I would like to work, and executed code . from there. This opens vscode at the given folder and then I created a haskell project using

  1. stack new my-project
  2. cd my-project
  3. stack setup

Then I build the project using stack build.

Next I donwload the extension haskell language support.
Next I download the extension haskell GHCi Debug Adapter Phoityne and follow the instructions by doing

  1. stack install haskell-dap ghci-dap haskell-debug-adapter

Finally I go under the Run and Debug tab in vscode, I click on create a launch.json file and and choose haskell-debug-adapter. This creates the launch.json file under .vscode folder

  1. {
  2.     // Use IntelliSense to learn about possible attributes.
  3.     // Hover to view descriptions of existing attributes.
  4.     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  5.     "version": "0.2.0",
  6.     "configurations": [
  7.         {
  8.             "type": "ghc",
  9.             "request": "launch",
  10.             "name": "haskell(stack)",
  11.             "internalConsoleOptions": "openOnSessionStart",
  12.             "workspace": "${workspaceFolder}",
  13.             "startup": "${workspaceFolder}/test/Spec.hs",
  14.             "startupFunc": "",
  15.             "startupArgs": "",
  16.             "stopOnEntry": false,
  17.             "mainArgs": "",
  18.             "ghciPrompt": "H>>= ",
  19.             "ghciInitialPrompt": "> ",
  20.             "ghciCmd": "stack ghci --with-ghc=ghci-dap --test --no-load --no-build --main-is TARGET",
  21.             "ghciEnv": {},
  22.             "logFile": "${workspaceFolder}/.vscode/phoityne.log",
  23.             "logLevel": "WARNING",
  24.             "forceInspect": false
  25.         },
  26.         {
  27.             "type": "ghc",
  28.             "request": "launch",
  29.             "name": "haskell(cabal)",
  30.             "internalConsoleOptions": "openOnSessionStart",
  31.             "workspace": "${workspaceFolder}",
  32.             "startup": "${workspaceFolder}/app/Main.hs",
  33.             "startupFunc": "",
  34.             "startupArgs": "",
  35.             "stopOnEntry": false,
  36.             "mainArgs": "",
  37.             "ghciPrompt": "H>>= ",
  38.             "ghciInitialPrompt": "> ",
  39.             "ghciCmd": "cabal repl -w ghci-dap --repl-no-load --builddir=${workspaceFolder}/.vscode/dist-cabal-repl",
  40.             "ghciEnv": {},
  41.             "logFile": "${workspaceFolder}/.vscode/phoityne.log",
  42.             "logLevel": "WARNING",
  43.             "forceInspect": false
  44.         }
  45.     ]
  46. }

It seems from this file that

{workspaceFolder}/test/Spec.hs is the entry point of the launch. This file contains

  1. main :: IO ()
  2. main = putStrLn "Test suite not yet implemented"

I put a breakpoint on both these lines and then click on the green play button for the haskell (stack) configuration.

However, this doesn't do nothing. It just loads for a few seconds and nothing is printed on the terminal and no breakpoints is hit. Does anyone has an idea what I am doing wrong?

答案1

得分: 2

我认为我成功复制了你的问题。 当你运行了：

  1. stack install haskell-dap ghci-dap haskell-debug-adapter

它应该已经将两个程序ghci-dap和haskell-debug-adapter安装到一个目录中，很可能是~/.local/bin。 请检查这些程序是否存在以及该目录是否在你的路径中，具体来说，你可以在VSCode终端窗口中启动ghci-dap --version和haskell-debug-adapter --version吗？

我发现如果这些程序不在我的路径中，我会遇到与你相同的问题——在绿色调试箭头下出现短暂的“等待”动画，然后什么都没有。

英文:

I think I was able to duplicate your problem. When you ran:

  1. stack install haskell-dap ghci-dap haskell-debug-adapter

it should have installed two programs ghci-dap and haskell-debug-adapter into a directory, most likely ~/.local/bin. Check that those programs are there and that that directory is in your path, specifically that you can launch ghci-dap --version and haskell-debug-adapter --version from the terminal Window within VSCode.

I found that if those programs weren't in my path, I experienced the same problem as you -- a brief "waiting" animation under the green debug arrow, and nothing else.

huangapple
  • 本文由 发表于 2023年7月31日 22:38:16
  • 转载请务必保留本文链接：https://go.coder-hub.com/76804669.html
  • haskell
  • haskell-stack
  • visual-studio-code
  • wsl-2
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