How to read input when debugging GO in Visual Studio Code?

Question

I want to debug a Go program in Visual Studio Code 1.24.0 which goes like this:

package main

import (
   "fmt"
)

func main() {
 fmt.Println("Hello World")
 var input int
 fmt.Scanf("%d", &input)
 fmt.Printf("Hello %v", input)
}

When start debugging, the program waits for input. I tried giving input via Debug Console, but it didn't work. Properties like externalConsole don't seem to work in launch.json for Go. Any inputs?

Answer 1

现在有一个简单的解决方案。您可以将以下行附加到启动配置中：

"console": "integratedTerminal"

请参阅vscode-go问题#2015

Answer 2

我很高兴与大家分享，找到了一个更可用的解决方案（它在启动之前自动运行任务）。

...

启动.json：

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Connect to server",
            "type": "go",
            "request": "attach",
            "preLaunchTask": "delve",
            "mode": "remote",
            "remotePath": "${workspaceFolder}",
            "port": 23456,
            "host": "127.0.0.1",
            "cwd": "${workspaceFolder}"
        }
    ]
}

和
tasks.json：

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "2.0.0",
    "tasks": [
        {
            "label": "delve",
            "type": "shell",
            "command": "dlv debug --headless --listen=:23456 --api-version=2 \"${workspaceFolder}\"",
            "isBackground": true,
            "presentation": {
                "focus": true,
                "panel": "dedicated",
                "clear": false
            },
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": {
                "pattern": {
                    "regexp": ""
                },
                "background": {
                    "activeOnStart": true,
                    "beginsPattern": {
                        "regexp": ".*"
                    },
                    "endsPattern": {
                        "regexp": ".*server listening.*"
                    }
                }
            }
        }
    ]
}

它期望您正在使用 go.mod，因为 delve 也会查找它来调试目录。

Answer 3

这类似于vscode-go 问题 219

解决方法（由 提出KingRikkie）是：

不过，有一个解决方法。我编写了一个执行以下操作的脚本：

• 编译您的应用程序而不进行优化和内联
• 在新窗口中启动应用程序
• 将 delve 无头附加到其进程 ID。

然后，我在 VScode 中创建了一个新任务，该任务启动脚本并preLaunchTask在launch.json.

就我而言，powershell 脚本位于编译 ' ' 目录中{workspaceRoot}名为 ' ' 的包中：mainmain

$EXECUTABLE_NAME="main"
$EXECUTABLE_PATH=".\main"
$GoPath=((go env | Select-String -Pattern "GOPATH=" | Out-String) -split "=")[1].TrimEnd()
$GoPath+="\bin"
Set-Location $EXECUTABLE_PATH
Start-Process go -ArgumentList 'build -gcflags "-N -l"' -Wait -NoNewWindow # compile without optimizations and inlining
Start-Process ".\$EXECUTABLE_NAME.exe"
$timeOut = 20
$started = $false
# wait for process to start
Do {
    Start-Sleep -Milliseconds 250
    $timeOut--
    $Proc = Get-Process main -ErrorAction SilentlyContinue
    If ($Proc) { 
        $started = $true 
    }
}
Until ($started -or $timeOut -eq 0)
If (!($started)) {
    Write-Error 'Process did not start' 
    Exit
}
$ProcId=($Proc | Select-Object -expand Id)
Start-Process -FilePath "$GoPath\dlv.exe" -ArgumentList "attach $ProcId --headless --listen=:2345 --log" -WindowStyle Hidden

任务：

"label": "debug-attach",
"type": "shell",
"command": "powershell -ExecutionPolicy UnRestricted -File ${workspaceRoot}\\debug-attach.ps1",
"presentation": {
    "reveal": "silent",
    "panel": "shared",
    "echo": false
}

启动配置：

"name": "Attach",
"type": "go",
"request": "launch",
"mode": "remote",
"remotePath": "${workspaceRoot}\\main",
"port": 2345,
"host": "127.0.0.1",
"program": "${workspaceRoot}\\main",
"preLaunchTask": "debug-attach",
"env": {},
"args": [],
"showLog": true

现在，当我按 F5 时，我的应用程序将弹出，调试将自动开始，delve 被隐藏。

自 2018 年 7 月以来，HowieLiuX于 2018 年 12 月报告了以下解决方法

使用远程调试+ vscode 任务：

task.json

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "2.0.0",
    "tasks": [
        {
            "label": "echo",
            "type": "shell",
            "command": "cd ${fileDirname} && dlv debug --headless --listen=:2345 --log --api-version=2",
            "problemMatcher": [],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        }
    ]
}

和：

launch.json:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Connect to server",
            "type": "go",
            "request": "launch",
            "mode": "remote",
            "remotePath": "${fileDirname}",
            "port": 2345,
            "host": "127.0.0.1",
            "program": "${fileDirname}",
            "env": {},
            "args": []
        }
    ]
}

使用快捷键（Mac OS 中为 Shift + cmd + B）运行任务：VSCode 将启动一个新 shell 并运行 delve 服务器。
按 F5 调试.go文件。