Change log level when files are not found (#138)

* Change log level when files are not found

* Adding new flag CI

main.go

@@ -33,6 +33,7 @@ type Flags struct {
 	TargetURL      string `docopt:"-l"`
 	BaseURL        string `docopt:"--base-url"`
 	Config         string `docopt:"--config"`
+	Ci             bool   `docopt:"--ci"`
 }
 
 const (
@@ -70,6 +71,7 @@ Options:
                         [default: auto]
   -c --config <path>   Use the specified configuration file.
                         [default: $HOME/.config/mark]
+  --ci                 Runs on CI mode. It won't fail if files are not found.
   -h --help            Show this message.
   -v --version         Show version.
 `
@@ -121,7 +123,12 @@ func main() {
 		log.Fatal(err)
 	}
 	if len(files) == 0 {
-		log.Fatal("No files matched")
+		msg := "No files matched"
+		if flags.Ci {
+			log.Warning(msg)
+		} else {
+			log.Fatal(msg)
+		}
 	}
 
 	// Loop through files matched by glob pattern