How to Set Up the Delve Debugger in Visual Studio Code for Go Development?

Setting Up the Delve Debugger in Visual Studio Code for Go Development

Facing difficulties getting the Go extension for VS Code to work, specifically for Delve debugging? Here's a comprehensive guide to resolve this issue.

Prerequisites:

• Install the latest Go version and set environment variables GOROOT and GOPATH.
• Add $GOPATH/bin to your OS PATH environment.
• Set the environment variable GO15VENDOREXPERIMENT to 1.
• Via the command go get github.com/derekparker/delve/cmd/dlv, ensure the dlv binary is present in $GOPATH/bin.
• Install Visual Studio Code.

VS Code Setup:

1. Launch VS Code Quick Open (Ctrl P), enter "ext install Go", and press Enter.
2. Install "Rich Go language support for Visual Studio Code".
3. Enable and restart VS Code.
4. Open the working directory (e.g., $GOPATHsrchello).
5. Create a new file (Ctrl N) or open hello.go from that folder:

package main

import "fmt"

func main() {
    fmt.Println("Hello World!")
    i := 101
    fmt.Println(i)
}

Debugging in VS Code:

1. Open the debugger (Ctrl Shift D).
2. Set a breakpoint on the line: i := 101.
3. Start debugging (F5).

4. Step through the code:

   • F10: Step Over
   • F11: Step Into
   • Shift F11: Step Out
5. Stop debugging (Shift F5) or restart debugging (Ctrl Shift F5).

Sample launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch",
            "type": "go",
            "request": "launch",
            "mode": "debug",
            "remotePath": "",
            "port": 2345,
            "host": "127.0.0.1",
            "program": "${workspaceRoot}",
            "env": {},
            "args": [],
            "showLog": true
        }
    ]
}

Upon following these steps, Delve debugging should work seamlessly in your VS Code for Go development.

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