How to Use go

You cannot use go:embed with build tags to select different files for different environments because go:embed directives are processed at compile time and must be valid for the specific build configuration. Instead, use build tags on the file containing the go:embed directive itself to include different files in different builds.

//go:build linux

package main

import "embed"

//go:embed config-linux.json
var ConfigData embed.FS

//go:build windows

package main

import "embed"

//go:embed config-windows.json
var ConfigData embed.FS

You cannot tell Go to pick one file or another based on the environment inside a single go:embed line. Instead, you create separate files for each environment (like Linux or Windows) and use build tags to ensure only the correct file is compiled into your program for that specific operating system.