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package server
import (	"embed"	"flag"	"fmt"	"net/http"	"os"	"os/exec"	"os/signal"	"path"	"strings"	"sync"	"syscall"
	"github.com/esm-dev/esm.sh/server/config"	"github.com/esm-dev/esm.sh/server/storage"
	logx "github.com/ije/gox/log"	"github.com/ije/rex")
var (	cfg          *config.Config	cache        storage.Cache	db           storage.DataBase	fs           storage.FileSystem	buildQueue   *BuildQueue	log          *logx.Logger	embedFS      EmbedFS	fetchLocks   sync.Map	installLocks sync.Map)
type EmbedFS interface {	ReadFile(name string) ([]byte, error)}
// Serve serves ESM serverfunc Serve(efs EmbedFS) {	var (		cfile string		isDev bool		err   error	)
	flag.StringVar(&cfile, "config", "config.json", "the config file path")	flag.BoolVar(&isDev, "dev", false, "to run server in development mode")	flag.Parse()
	if !fileExists(cfile) {		cfg = config.Default()		fmt.Println("Config file not found, use default config")	} else {		cfg, err = config.Load(cfile)		if err != nil {			fmt.Println(err.Error())			os.Exit(1)		}		fmt.Println("Config loaded from", cfile)	}
	if isDev {		cfg.LogLevel = "debug"		cwd, err := os.Getwd()		if err != nil {			fmt.Println(err)			os.Exit(1)		}		embedFS = &devFS{cwd}	} else {		os.Setenv("NO_COLOR", "1") // disable log color in production		embedFS = efs	}
	log, err = logx.New(fmt.Sprintf("file:%s?buffer=32k", path.Join(cfg.LogDir, fmt.Sprintf("main-v%d.log", VERSION))))	if err != nil {		fmt.Printf("initiate logger: %v\n", err)		os.Exit(1)	}	log.SetLevelByName(cfg.LogLevel)
	nodeInstallDir := os.Getenv("NODE_INSTALL_DIR")	if nodeInstallDir == "" {		nodeInstallDir = path.Join(cfg.WorkDir, "nodejs")	}	nodeVer, pnpmVer, err := checkNodejs(nodeInstallDir)	if err != nil {		log.Fatalf("check nodejs: %v", err)	}	if cfg.NpmRegistry == "" {		output, err := exec.Command("npm", "config", "get", "registry").CombinedOutput()		if err == nil {			cfg.NpmRegistry = strings.TrimRight(strings.TrimSpace(string(output)), "/") + "/"		}	}	log.Infof("nodejs: v%s, pnpm: %s, registry: %s", nodeVer, pnpmVer, cfg.NpmRegistry)
	err = initCJSLexerWorkDirectory()	if err != nil {		log.Fatalf("init cjs-lexer: %v", err)	}
	cache, err = storage.OpenCache(cfg.Cache)	if err != nil {		log.Fatalf("init storage(cache,%s): %v", cfg.Cache, err)	}
	fs, err = storage.OpenFS(cfg.Storage)	if err != nil {		log.Fatalf("init storage(fs,%s): %v", cfg.Storage, err)	}
	db, err = storage.OpenDB(cfg.Database)	if err != nil {		log.Fatalf("init storage(db,%s): %v", cfg.Database, err)	}
	buildQueue = newBuildQueue(int(cfg.BuildConcurrency))
	var accessLogger *logx.Logger	if cfg.LogDir == "" {		accessLogger = &logx.Logger{}	} else {		accessLogger, err = logx.New(fmt.Sprintf("file:%s?buffer=32k&fileDateFormat=20060102", path.Join(cfg.LogDir, "access.log")))		if err != nil {			log.Fatalf("initiate access logger: %v", err)		}	}	accessLogger.SetQuite(true) // quite in terminal
	if !cfg.NoCompress {		rex.Use(rex.Compression())	}	rex.Use(		rex.ErrorLogger(log),		rex.AccessLogger(accessLogger),		rex.Header("Server", "esm.sh"),		rex.Cors(rex.CORS{			AllowedOrigins: []string{"*"},			AllowedMethods: []string{				http.MethodGet,				http.MethodPost,			},			ExposedHeaders:   []string{"X-TypeScript-Types"},			AllowCredentials: false,		}),		auth(cfg.AuthSecret),		apiHandler(),		esmHandler(),	)
	C := rex.Serve(rex.ServerConfig{		Port: uint16(cfg.Port),		TLS: rex.TLSConfig{			Port: uint16(cfg.TlsPort),			AutoTLS: rex.AutoTLSConfig{				AcceptTOS: cfg.TlsPort > 0 && !isDev,				CacheDir:  path.Join(cfg.WorkDir, "autotls"),			},		},	})
	log.Infof("Server is ready on http://localhost:%d", cfg.Port)
	c := make(chan os.Signal, 1)	signal.Notify(c, syscall.SIGTERM, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGHUP, syscall.SIGABRT)	select {	case <-c:	case err = <-C:		log.Error(err)	}
	// release resources	db.Close()	log.FlushBuffer()	accessLogger.FlushBuffer()}
func init() {	embedFS = &embed.FS{}	log = &logx.Logger{}}