refactor layout and structure

proxy/cmd/proxy/main.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"log/slog"
+	"os"
+	"runtime"
+	"strings"
+
+	"github.com/netbirdio/netbird/proxy"
+	"golang.org/x/crypto/acme"
+)
+
+const DefaultManagementURL = "https://api.netbird.io:443"
+
+var (
+	// Version is the application version (set via ldflags during build)
+	Version = "dev"
+
+	// Commit is the git commit hash (set via ldflags during build)
+	Commit = "unknown"
+
+	// BuildDate is the build date (set via ldflags during build)
+	BuildDate = "unknown"
+
+	// GoVersion is the Go version used to build the binary
+	GoVersion = runtime.Version()
+)
+
+func envBoolOrDefault(key string, def bool) bool {
+	v, exists := os.LookupEnv(key)
+	if !exists {
+		return def
+	}
+	return v == strings.ToLower("true")
+}
+
+func envStringOrDefault(key string, def string) string {
+	v, exists := os.LookupEnv(key)
+	if !exists {
+		return def
+	}
+	return v
+}
+
+func main() {
+	var (
+		version, acmeCerts                         bool
+		mgmtAddr, addr, certDir, acmeAddr, acmeDir string
+	)
+
+	flag.BoolVar(&version, "v", false, "Print version and exit")
+	flag.StringVar(&mgmtAddr, "mgmt", envStringOrDefault("NB_PROXY_MANAGEMENT_ADDRESS", DefaultManagementURL), "Management address to connect to.")
+	flag.StringVar(&addr, "addr", envStringOrDefault("NB_PROXY_ADDRESS", ":443"), "Reverse proxy address to listen on.")
+	flag.StringVar(&certDir, "cert-dir", envStringOrDefault("NB_PROXY_CERTIFICATE_DIRECTORY", "./certs"), "Directory to store ")
+	flag.BoolVar(&acmeCerts, "acme-certs", envBoolOrDefault("NB_PROXY_ACME_CERTIFICATES", false), "Generate ACME certificates using HTTP-01 challenges.")
+	flag.StringVar(&acmeAddr, "acme-addr", envStringOrDefault("NB_PROXY_ACME_ADDRESS", ":80"), "HTTP address to listen on, used for ACME HTTP-01 certificate generation.")
+	flag.StringVar(&acmeDir, "acme-dir", envStringOrDefault("NB_PROXY_ACME_DIRECTORY", acme.LetsEncryptURL), "URL of ACME challenge directory.")
+	flag.Parse()
+
+	if version {
+		fmt.Printf("Version: %s, Commit: %s, BuildDate: %s, Go: %s", Version, Commit, BuildDate, GoVersion)
+		os.Exit(0)
+	}
+
+	// Write error logs to stderr.
+	errorLog := slog.New(slog.NewTextHandler(os.Stderr, nil))
+
+	srv := proxy.Server{
+		ErrorLog:                 errorLog,
+		ManagementAddress:        mgmtAddr,
+		CertificateDirectory:     certDir,
+		GenerateACMECertificates: acmeCerts,
+		ACMEChallengeAddress:     acmeAddr,
+		ACMEDirectory:            acmeDir,
+	}
+
+	if err := srv.ListenAndServe(context.TODO(), addr); err != nil {
+		log.Fatal(err)
+	}
+}