I have a logging module that works different for prod and dev. I use build tags for this. Everything compiles and works fine, but VSCode doesn’t understand what I’m doing and gives errors.

Here is the minimum working code for prod (logging/logger_prod.go):

//go:build !dev
// +build !dev

package logging

type ProdLogger struct {
}

func NewLogger() Logger {
    return &ProdLogger{}
}

func (l *ProdLogger) Printf(pattern string, args ...interface{}) {
}

And for dev (logging/logger_dev.go):

//go:build dev
// +build dev

package logging

import "fmt"

type DevLogger struct {
}

func NewLogger() Logger {
    return &DevLogger{}
}

func (l *DevLogger) Printf(pattern string, args ...interface{}) {
    fmt.Printf(pattern, args...)
}

Main file (main.go):

package main

import (
    "github.com/eightlay/azula/internal/modules/logging"
)

func main() {
    logger := logging.NewLogger()
    logger.Printf("Hello, World!")
}

My launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Dev",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "cmd/gateway/main.go",
            "envFile": "${workspaceFolder}/.env",
            "env": {
                "GOFLAGS": "-tags=dev"
            }
        },
        {
            "name": "Launch Prod",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "cmd/gateway/main.go",
            "envFile": "${workspaceFolder}/.env",
            "env": {
                "GOFLAGS": "-tags=prod"
            }
        }
    ]
}

The error is: “No packages found for open file ***/logger_prod.go.
This file may be excluded due to its build tags; try adding “-tags=” to your gopls “buildFlags” configuration” in logger_prod.go

I’ve tried to specify buildTags in settings.json – makes no difference.

I’ve tried to use //go:build prod and // +build prod in the prod file. The errors are: “NewLogger redeclared in this block” for both prod and dev files, “undefined: logging.NewLogger” for main.go.

How should I configure VSCode to solve this issue?