primeiro commit

2026-09-16 00:18:01 -03:00
commit 1a5a446b5c
10 changed files with 472 additions and 0 deletions
@@ -0,0 +1,108 @@
+// Command he-dydns updates Hurricane Electric dynamic DNS entries.
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+
+	"git.aehoo.net/alphard/he-dydns/internal/config"
+	"git.aehoo.net/alphard/he-dydns/internal/updater"
+)
+
+func main() {
+	log.SetFlags(log.LstdFlags)
+
+	daemon := false
+	configPath := ""
+
+	args := os.Args[1:]
+	for i := 0; i < len(args); i++ {
+		arg := args[i]
+		switch {
+		case arg == "daemon":
+			daemon = true
+		case arg == "-h" || arg == "--help" || arg == "help":
+			usage()
+			return
+		case arg == "--config" || arg == "-config":
+			i++
+			if i >= len(args) {
+				fmt.Fprintf(os.Stderr, "%s requires a path argument\n", arg)
+				usage()
+				os.Exit(2)
+			}
+			configPath = args[i]
+		case strings.HasPrefix(arg, "--config="):
+			configPath = strings.TrimPrefix(arg, "--config=")
+		case strings.HasPrefix(arg, "-config="):
+			configPath = strings.TrimPrefix(arg, "-config=")
+		default:
+			fmt.Fprintf(os.Stderr, "unknown argument: %s\n", arg)
+			usage()
+			os.Exit(2)
+		}
+	}
+
+	if configPath == "" {
+		var err error
+		configPath, err = config.DefaultPath()
+		if err != nil {
+			log.Fatalf("fatal: %v", err)
+		}
+	}
+
+	cfg, err := config.Load(configPath)
+	if err != nil {
+		log.Fatalf("fatal: %v", err)
+	}
+
+	runErr := updater.Run(cfg)
+	if runErr != nil {
+		log.Printf("update pass completed with errors: %v", runErr)
+	}
+
+	if !daemon {
+		if runErr != nil {
+			os.Exit(1)
+		}
+		return
+	}
+
+	interval := time.Duration(cfg.IntervalMinutes) * time.Minute
+	log.Printf("entering daemon mode, updating every %d minute(s)", cfg.IntervalMinutes)
+
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
+
+	for {
+		select {
+		case <-ticker.C:
+			if err := updater.Run(cfg); err != nil {
+				log.Printf("update pass completed with errors: %v", err)
+			}
+		case sig := <-sigCh:
+			log.Printf("received %s, shutting down", sig)
+			return
+		}
+	}
+}
+
+func usage() {
+	defaultPath := "~/.config/he-dydns/config.toml"
+	if p, err := config.DefaultPath(); err == nil {
+		defaultPath = p
+	}
+
+	fmt.Fprintln(os.Stderr, "usage: he-dydns [--config path] [daemon]")
+	fmt.Fprintf(os.Stderr, "  --config path  load configuration from path instead of %s\n", defaultPath)
+	fmt.Fprintln(os.Stderr, "  (no args)      run one update pass and exit")
+	fmt.Fprintln(os.Stderr, "  daemon         run one update pass, then repeat on the configured interval")
+}