scanner: use create time if we have it

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/andybalholm/cascadia v1.3.2
 	github.com/dexterlb/mpvipc v0.0.0-20230829142118-145d6eabdc37
 	github.com/disintegration/imaging v1.6.2
+	github.com/djherbis/times v1.6.0
 	github.com/dustin/go-humanize v1.0.1
 	github.com/fatih/structs v1.1.0
 	github.com/fsnotify/fsnotify v1.7.0
@@ -28,6 +29,7 @@ require (
 	go.senan.xyz/flagconf v0.1.8
 	golang.org/x/net v0.24.0
 	golang.org/x/sync v0.7.0
+	golang.org/x/sys v0.19.0
 	gopkg.in/gormigrate.v1 v1.6.0
 	jaytaylor.com/html2text v0.0.0-20230321000545-74c2419ad056
 )
@@ -60,7 +62,6 @@ require (
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	golang.org/x/crypto v0.22.0 // indirect
 	golang.org/x/image v0.15.0 // indirect
-	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect

go.sum

@@ -21,6 +21,8 @@ github.com/dexterlb/mpvipc v0.0.0-20230829142118-145d6eabdc37 h1:s+qNFsO3VsdsKro
 github.com/dexterlb/mpvipc v0.0.0-20230829142118-145d6eabdc37/go.mod h1:CXCwawNJCtFDip7gvbaQVgw0cGjldpyHDIp7oA5prOg=
 github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
 github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
+github.com/djherbis/times v1.6.0 h1:w2ctJ92J8fBvWPxugmXIv7Nz7Q3iDMKNx9v5ocVH20c=
+github.com/djherbis/times v1.6.0/go.mod h1:gOHeRAz2h+VJNZ5Gmc/o7iD9k4wW7NMVqieYCY99oc0=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 h1:Yzb9+7DPaBjB8zlTR87/ElzFsnQfuHnVUVqpZZIcV5Y=
@@ -174,6 +176,7 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220615213510-4f61da869c0c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

scanner/scanner.go

@@ -17,6 +17,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/djherbis/times"
 	"github.com/fsnotify/fsnotify"
 	"github.com/jinzhu/gorm"
 	"github.com/rainycape/unidecode"
@@ -314,17 +315,18 @@ func (s *Scanner) scanDir(tx *db.DB, st *State, absPath string) error {
 }
 
 func (s *Scanner) populateTrackAndArtists(tx *db.DB, st *State, i int, album *db.Album, basename string, absPath string) error {
-	stat, err := os.Stat(absPath)
+	// useful to get the real create/birth time for filesystems and kernels which support it
+	timeSpec, err := times.Stat(absPath)
 	if err != nil {
-		return fmt.Errorf("stating %q: %w", basename, err)
+		return fmt.Errorf("get times %q: %w", basename, err)
 	}
 
 	var track db.Track
 	if err := tx.Where("album_id=? AND filename=?", album.ID, filepath.Base(basename)).First(&track).Error; err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
 		return fmt.Errorf("query track: %w", err)
 	}
 
-	if !st.isFull && track.ID != 0 && stat.ModTime().Before(track.UpdatedAt) {
+	if !st.isFull && track.ID != 0 && timeSpec.ModTime().Before(track.UpdatedAt) {
 		st.seenTracks[track.ID] = struct{}{}
 		return nil
 	}
@@ -363,7 +365,7 @@ func (s *Scanner) populateTrackAndArtists(tx *db.DB, st *State, i int, album *db
 			return fmt.Errorf("populate track artists: %w", err)
 		}
 
-		if err := populateAlbum(tx, album, trags, stat.ModTime()); err != nil {
+		if err := populateAlbum(tx, album, trags, timeSpec.ChangeTime(), timeSpec.BirthTime()); err != nil {
 			return fmt.Errorf("populate album: %w", err)
 		}
 
@@ -372,6 +374,10 @@ func (s *Scanner) populateTrackAndArtists(tx *db.DB, st *State, i int, album *db
 		}
 	}
 
+	stat, err := os.Stat(absPath)
+	if err != nil {
+		return fmt.Errorf("stating %q: %w", basename, err)
+	}
 	if err := populateTrack(tx, album, &track, trags, basename, int(stat.Size())); err != nil {
 		return fmt.Errorf("process %q: %w", basename, err)
 	}
@@ -402,17 +408,17 @@ func (s *Scanner) populateTrackAndArtists(tx *db.DB, st *State, i int, album *db
 	return nil
 }
 
-func populateAlbum(tx *db.DB, album *db.Album, trags tagcommon.Info, modTime time.Time) error {
+func populateAlbum(tx *db.DB, album *db.Album, trags tagcommon.Info, modifiedAt, createdAt time.Time) error {
 	albumName := tagcommon.MustAlbum(trags)
 	album.TagTitle = albumName
 	album.TagTitleUDec = decoded(albumName)
 	album.TagAlbumArtist = tagcommon.MustAlbumArtist(trags)
 	album.TagBrainzID = trags.AlbumBrainzID()
 	album.TagYear = trags.Year()
 
-	album.ModifiedAt = modTime
-	if album.CreatedAt.After(modTime) {
-		album.CreatedAt = modTime // reset created at to match filesytem for new albums
+	album.ModifiedAt = modifiedAt
+	if album.CreatedAt.After(createdAt) {
+		album.CreatedAt = createdAt // reset created at to match filesytem for new albums
 	}
 
 	if err := tx.Save(&album).Error; err != nil {