added refresh db capability and did some refactoring

handlerPkgs.go

@@ -9,17 +9,17 @@ import (
 	"gitea.ewpt3ch.dev/ewpt3ch/pkgstash/internal/cache"
 )
 
-func handlePackage(w http.ResponseWriter, req *http.Request, c *cache.Cache) {
+func (s *Server) handlePackage(w http.ResponseWriter, req *http.Request) {
 	// build file paths from the request, they follow archlinux repo
-	// <reporoot>/[core, extra, etc]/os/[x86_64, arm, etc]/package.pkg.tar.zst[.sig]
+	// <mirrorroot>/[core, extra, etc]/os/[x86_64, arm, etc]/package.pkg.tar.zst[.sig]
 	repo := req.PathValue("repo")
 	arch := req.PathValue("arch")
 	file := req.PathValue("file")
-	relPath := filepath.Join(repo, "os", arch, file) //path from repo root to pkg or db file
-	pkgPath := filepath.Join(repoRoot, relPath)      //path for local read of the file
+	repoPath := filepath.Join(repo, "os", arch, file)    //path from mirror root to pkg or db file
+	pkgPath := filepath.Join(s.cfg.MirrorRoot, repoPath) //absolute path for local read of the file
 
 	if _, err := os.Stat(pkgPath); err != nil {
-		err = c.Fetch(relPath)
+		err = s.c.Fetch(repoPath)
 		if err != nil {
 			var upstreamErr *cache.UpstreamError
 			if errors.As(err, &upstreamErr) {