check for ffprobe installed

main.go

@@ -2,23 +2,29 @@ package main
 
 import (
 	"fmt"
+	"os/exec"
 	"time"
 
 	"git.milar.in/nyaanime/logic"
 )
 
 func main() {
-	fmt.Println("generated priority values:")
-	fmt.Print(Map2Table("language", logic.PreferredLanguages))
-	fmt.Print(Map2Table("subtitle", logic.PreferredSubtitles))
-	fmt.Print(Map2Table("resolution", logic.PreferredResolutions))
-	fmt.Println()
+	// check for ffprobe in PATH
+	if _, err := exec.LookPath("ffprobe"); err != nil {
+		panic(err) // TODO error handling
+	}
 
 	// get access token once at startup to be sure that an access token is obtainable at all
 	if _, err := logic.GetAnilistAccessToken(); err != nil {
 		panic(err)
 	}
 
+	fmt.Println("generated priority values:")
+	fmt.Print(Map2Table("language", logic.PreferredLanguages))
+	fmt.Print(Map2Table("subtitle", logic.PreferredSubtitles))
+	fmt.Print(Map2Table("resolution", logic.PreferredResolutions))
+	fmt.Println()
+
 	ticker := time.NewTicker(PollRate)
 	defer ticker.Stop()