update comments

main.go

@@ -36,7 +36,7 @@ type ROMCache struct {
 const (
 	romDirectory      = "public"               // directory where ROMs are available for download
 	buildOutDirectory = "out"                  // directory from build system containing artifacts which we can move to romDirectory
-	cacheFile         = "public/romcache.json"
+	cacheFile         = "public/romcache.json" // persistence between server restarts so we don't have to rehash all the ROM files each time the program starts
 )
 
 var ( // evil global variable
@@ -67,7 +67,7 @@ func init() {
 		log.Printf("loaded cached file: %s", rom.Filename)
 	}
 
-	// Check if any new build artifacts and preload the romCache
+	// Check if any new build artifacts and load any new files into the romCache
 	moveBuildArtifacts()
 	go updateROMCache()
 }
@@ -179,9 +179,11 @@ func updateROMCache() {
 }
 
 // http - GET /
-// Writes JSON response for the updater app to know what versions are available to download
+// The LineageOS updater app needs a JSON array of type LineageOSROM
+// Marshal's romCache.ROMs to JSON to serve as the response body
+
 func lineageOSROMListHandler(w http.ResponseWriter, r *http.Request) {
-	go func() {
+	go func() { // Also checks for new builds - TBD need a better method as the first request will return no new updates.  inotify?
 		newBuilds := moveBuildArtifacts()
 		if newBuilds {
 			updateROMCache()