How to pass command-line arguments in debug mode in VSCode with golang

Question

I am having difficulty in passing command-line arguments in VSCode (debug mode) with golang.

Below is the small code example and the launch.json:

package main

import (
    "flag"
    "fmt"
)

func main() {
    flag1Ptr := flag.Bool("flag1", false, "flag1 is a flag")
    flag.Parse()
    fmt.Println(*flag1Ptr)
    fmt.Println("Hello, world")
}

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "${fileDirname}",
            "env": {},
            "args": [
                "-flag1"
            ]
        }
    ]
}

The output is always "false" for *flag1Ptr but it should be "true".

Update: The issue disappeared after closing down VSCode and reopening it (I am on a Mac(osX))

I tested your code and it works for me. I get the value true with vscode debugger. — chmike
– chmike, Commented Dec 2, 2019 at 15:42
Very strange. I am using a Mac (osX). I don't know why it is not working. — Dave_J
– Dave_J, Commented Dec 2, 2019 at 15:52
I’ve tested it on a linux computer. I don’t have a mac around to test it. — chmike
– chmike, Commented Dec 2, 2019 at 15:57
I am not sure what happened (I did close down VSCode and reopened it) but it started working. The trace:log file also started working. — Dave_J
– Dave_J, Commented Dec 2, 2019 at 16:45
I experienced similar things too. It looks like restarting vscode when we see something unexpected is the first thing to do. Good to see you solved your problem. — chmike
– chmike, Commented Dec 2, 2019 at 17:48

nettm · Accepted Answer · 2020-08-15 06:57:46Z

50

list all params, for example, command is:

"hello.exe -in InfoEntity.java -out aa.out"

the debug config is:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "${fileDirname}",
            "env": {},
            "args": ["-in", "InfoEntity.java", "-out", "aa.out"]
        }
    ]
}

answered Aug 15, 2020 at 6:57

nettm

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1 Comment

Arya Pourtabatabaie Over a year ago

What if you want to pass arguments to Go itself? Like build tags etc. e.g. go run -tags=sth .

Raven Danish · Accepted Answer · 2024-12-08 11:50:25Z

0

For me just adding launch.json to .vscode worked but not with Run Current File or Node.js options in RUN AND DEBUG menu, I needed to use Launch Program and it worked

answered Dec 8, 2024 at 11:50

Raven Danish

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