From cff5600c8abebd1ce988b2185c07e998c4a1d483 Mon Sep 17 00:00:00 2001
From: Gabriel Arakaki Giovanini <mail@gabrielgio.me>
Date: Fri, 23 Jun 2023 23:37:57 +0200
Subject: fix: Wrap media scan into a go routine

For some unknown reason `ReadExif` hangs when the context is canceled
through signal handling. Perhaps perl-exif tooling is closing on
`SIGNINT`.
---
 pkg/worker/exif_scanner.go | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/pkg/worker/exif_scanner.go b/pkg/worker/exif_scanner.go
index 6d40dbd..d7865e3 100644
--- a/pkg/worker/exif_scanner.go
+++ b/pkg/worker/exif_scanner.go
@@ -33,8 +33,33 @@ func (e *EXIFScanner) Query(ctx context.Context) ([]*media.Media, error) {
 	return medias, nil
 }
 
+func wrapReadExif(ctx context.Context, path string) (*media.MediaEXIF, error) {
+	c := make(chan *media.MediaEXIF)
+	e := make(chan error)
+	go func() {
+		defer close(c)
+		defer close(e)
+
+		newExif, err := fileop.ReadExif(path)
+		if err != nil {
+			e <- err
+		} else {
+			c <- newExif
+		}
+	}()
+
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case m := <-c:
+		return m, nil
+	case err := <-e:
+		return nil, err
+	}
+}
+
 func (e *EXIFScanner) Process(ctx context.Context, m *media.Media) error {
-	newExif, err := fileop.ReadExif(m.Path)
+	newExif, err := wrapReadExif(ctx, m.Path)
 	if err != nil {
 		return err
 	}
-- 
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