Initial matrix client wiring

main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"github.com/matrix-org/gomatrix"
 )
 
 func main() {
@@ -13,11 +14,37 @@ func main() {
 	var logger *log.Logger = log.New(os.Stdout, "", log.Flags())
 
 	// Handle command-line arguments.
+	var homeserver = flag.String("homeserver", "https://matrix.org", "Address of Matrix homeserver")
+	var user = flag.String("user", "", "Full MXID (e.g. @example.domain.tld) of Matrix user")
+	var token = flag.String("token", "", "Access Token of Matrix user")
+	var target = flag.String("target-room", "", "Matrix room to be notified of alerts.")
 	var port = flag.Int("port", 9088, "HTTP port to listen on (incoming alertmanager webhooks)")
 	flag.Parse()
 
+	if *user == "" {
+		logger.Fatal("Matrix user is required. See --help for usage.")
+	}
+	if *token == "" {
+		logger.Fatal("Matrix access token is required. See --help for usage.")
+	}
+	if *target== "" {
+		logger.Fatal("Matrix target room is required. See --help for usage.")
+	}
+
 	// Initialize Matrix client.
-	// TODO
+	matrixClient, err := gomatrix.NewClient(*homeserver, *user, *token)
+	if err != nil {
+		logger.Fatalf("Could not log in to Matrix (%v): %v", *homeserver, err)
+	}
+
+	/*
+	logger.Printf("Syncing with Matrix homserver (%v)", *homeserver)
+	err = matrixClient.Sync()
+	if err != nil {
+		logger.Fatalf("Could not sync with Matrix homeserver (%v): %v", *homeserver, err)
+	}
+	*/
+	_ = matrixClient
 
 	// Initialize HTTP serve (= listen for incoming requests).
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {