feat(scanner): added option to scan at startup

closes #251

README.md

@@ -150,7 +150,7 @@ view the admin UI at <http://localhost:4747>
 ## configuration options
 
 | env var                       | command line arg         | description                                                                                                 |
-| ------------------------- | ----------------------- | ----------------------------------------------------------------------------------------------------------- |
+| ----------------------------- | ------------------------ | ----------------------------------------------------------------------------------------------------------- |
 | `GONIC_MUSIC_PATH`            | `-music-path`            | path to your music collection (see also multi-folder support below)                                         |
 | `GONIC_PODCAST_PATH`          | `-podcast-path`          | path to a podcasts directory                                                                                |
 | `GONIC_CACHE_PATH`            | `-cache-path`            | path to store audio transcodes, covers, etc                                                                 |
@@ -161,7 +161,8 @@ view the admin UI at <http://localhost:4747>
 | `GONIC_TLS_KEY`               | `-tls-key`               | **optional** path to a TLS key (enables HTTPS listening)                                                    |
 | `GONIC_PROXY_PREFIX`          | `-proxy-prefix`          | **optional** url path prefix to use if behind reverse proxy. eg `/gonic` (see example configs below)        |
 | `GONIC_SCAN_INTERVAL`         | `-scan-interval`         | **optional** interval (in minutes) to check for new music (automatic scanning disabled if omitted)          |
-| `GONIC_SCAN_WATCHER`      | `-scan-watcher-enabled` | **optional** whether to watch file system for new music and rescan                                          |
+| `GONIC_SCAN_AT_START_ENABLED` | `-scan-at-start-enabled` | **optional** whether to perform an initial scan at startup                                                  |
+| `GONIC_SCAN_WATCHER_ENABLED`  | `-scan-watcher-enabled`  | **optional** whether to watch file system for new music and rescan                                          |
 | `GONIC_JUKEBOX_ENABLED`       | `-jukebox-enabled`       | **optional** whether the subsonic [jukebox api](https://airsonic.github.io/docs/jukebox/) should be enabled |
 | `GONIC_PODCAST_PURGE_AGE`     | `-podcast-purge-age`     | **optional** age (in days) to purge podcast episodes if not accessed                                        |
 | `GONIC_GENRE_SPLIT`           | `-genre-split`           | **optional** a string or character to split genre tags on for multi-genre support (eg. `;`)                 |

cmd/gonic/gonic.go

@@ -37,6 +37,7 @@ func main() {
 	confCachePath := set.String("cache-path", "", "path to cache")
 	confDBPath := set.String("db-path", "gonic.db", "path to database (optional)")
 	confScanIntervalMins := set.Int("scan-interval", 0, "interval (in minutes) to automatically scan music (optional)")
+	confScanAtStart := set.Bool("scan-at-start-enabled", false, "whether to perform an initial scan at startup (optional)")
 	confScanWatcher := set.Bool("scan-watcher-enabled", false, "whether to watch file system for new music and rescan (optional)")
 	confJukeboxEnabled := set.Bool("jukebox-enabled", false, "whether the subsonic jukebox api should be enabled (optional)")
 	confPodcastPurgeAgeDays := set.Int("podcast-purge-age", 0, "age (in days) to purge podcast episodes if not accessed (optional)")
@@ -146,6 +147,9 @@ func main() {
 	if *confPodcastPurgeAgeDays > 0 {
 		g.Add(server.StartPodcastPurger(time.Duration(*confPodcastPurgeAgeDays) * 24 * time.Hour))
 	}
+	if *confScanAtStart {
+		server.ScanAtStart()
+	}
 
 	if err := g.Run(); err != nil {
 		log.Panicf("error in job: %v", err)

server/server.go

@@ -344,6 +344,12 @@ func (s *Server) StartScanTicker(dur time.Duration) (FuncExecute, FuncInterrupt)
 		}
 }
 
+func (s *Server) ScanAtStart() {
+	if _, err := s.scanner.ScanAndClean(scanner.ScanOptions{}); err != nil {
+		log.Printf("error scanning: %v", err)
+	}
+}
+
 func (s *Server) StartScanWatcher() (FuncExecute, FuncInterrupt) {
 	return func() error {
 			log.Printf("starting job 'scan watcher'\n")