Add CLI flag to only show config UI and skip the slideshow display (so you can config & auto-reload the main piframe ui over ssh and similar

cmd/gui/gui.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"os"
 
@@ -8,6 +9,8 @@ import (
 	"github.com/knadh/koanf/parsers/toml"
 	"github.com/knadh/koanf/providers/confmap"
 	"github.com/knadh/koanf/providers/file"
+	"github.com/knadh/koanf/providers/posflag"
+	flag "github.com/spf13/pflag"
 	//"git.kemonine.info/PiFrame/ui"
 )
 
@@ -29,6 +32,17 @@ const (
 )
 
 func main() {
+	// Command line flag handler
+	f := flag.NewFlagSet("config", flag.ContinueOnError)
+	f.Usage = func() {
+		fmt.Println(f.FlagUsages())
+		os.Exit(0)
+	}
+	// Command line flags
+	f.Bool("config-ui-only", false, "Only show the config UI, NOT the slideshow")
+	// Process command line flags into handler
+	f.Parse(os.Args[1:])
+
 	// Main config variable
 	var pfConfig = koanf.New(".")
 
@@ -41,17 +55,23 @@ func main() {
 		CONFIG_KEY_ALBUMS_SELECTED:    []string{DEFAULT_ALBUM_SELECTED},
 	}, "."), nil)
 
+	// Bring in /etc/defaults/pf.toml if it exists
 	_, err := os.Stat(CONFIG_FILE_PATH)
 	if err != nil {
 		if os.IsNotExist(err) {
 			log.Printf("%s does not exist, USING DEFAULTS", CONFIG_FILE_PATH)
 		} else {
 			if errConfigFile := pfConfig.Load(file.Provider(CONFIG_FILE_PATH), toml.Parser()); errConfigFile != nil {
-				log.Fatalf("Error loading config: %s", err)
+				log.Fatalf("Error loading config : %s", err)
 			}
 		}
 	}
 
+	// Process command line flags
+	if err := pfConfig.Load(posflag.Provider(f, ".", pfConfig), nil); err != nil {
+		log.Fatalf("Error loading command line flags : %v", err)
+	}
+
 	// slideshowDuration := pfConfig.Duration(CONFIG_KEY_SLIDESHOW_DURATION)
 	// hdmiOff := pfConfig.String(CONFIG_KEY_HDMI_OFF)
 	// hdmiOn := pfConfig.String(CONFIG_KEY_HDMI_ON)