You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.go
    path of file: ./repos/wails/v2/cmd/wails/flags
    
    the code of the file until where you have to start completion: package flags

import (
	"fmt"
	"os"
	"os/exec"
	"runtime"
	"strings"

	"github.com/leaanthony/slicer"
	"github.com/wailsapp/wails/v2/internal/system"
	"github.com/wailsapp/wails/v2/pkg/commands/build"
	"github.com/wailsapp/wails/v2/pkg/commands/buildtags"
)

const (
	Quiet   int = 0
	Normal  int = 1
	Verbose int = 2
)

// TODO: unify this and `build.Options`
type Build struct {
	Common
	BuildCommon

	NoPackage               bool   `name:"noPackage" description:"Skips platform specific packaging"`
	Upx                     bool   `description:"Compress final binary with UPX (if installed)"`
	UpxFlags                string `d
    
func (b *Build) Process() error {
	// Lookup compiler path
	var err error
	b.compilerPath, err = exec.LookPath(b.Compiler)
	if err != nil {
		return fmt.Errorf("unable to find compiler: %s", b.Compiler)
	}

	// Process User Tags
	b.userTags, err = buildtags.Parse(b.Tags)
	if err != nil {
		return err
	}

	// WebView2 installer strategy (download by default)
	b.WebView2 = strings.ToLower(b.WebView2)
	if b.WebView2 != "" {
		validWV2Runtime := slicer.String([]string{"download", "embed", "browser", "error"})
		if !validWV2Runtime.Contains(b.WebView2) {
			return fmt.Errorf("invalid option for flag 'webview2': %s", b.WebView2)
		}
		b.wv2rtstrategy = "wv2runtime." + b.WebView2
	}

	return nil
}