Store index jars in persistent storage

cmd/fdroidcl/update.go

@@ -15,7 +15,6 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/mvdan/basedir"
 	"github.com/mvdan/fdroidcl"
 )
 
@@ -102,20 +101,7 @@ func downloadEtag(url, path string, sum []byte) error {
 }
 
 func indexPath(name string) string {
-	cache, err := basedir.Cache()
-	if err != nil {
-		log.Fatalf("Could not determine cache dir: %v", err)
-	}
-	return filepath.Join(appSubdir(cache), repoName+".jar")
-}
-
-func appSubdir(dir string, subdir ...string) string {
-	elems := append([]string{dir, "fdroidcl"}, subdir...)
-	p := filepath.Join(elems...)
-	if err := os.MkdirAll(p, 0755); err != nil {
-		log.Fatalf("Could not create app dir: %v", err)
-	}
-	return p
+	return filepath.Join(mustConfig(), repoName+".jar")
 }
 
 func mustLoadIndex() *fdroidcl.Index {