Make database path more dynamic

cmd/main.go

@@ -1,19 +1,39 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 	"os"
+	"path"
 
 	"haberdasher-twirp/haberdasher"
 	"haberdasher-twirp/internal/haberdasherserver"
 )
 
 func main() {
+	var cwd, dbPath, dbDir string
+	var err error
+
 	var bind string = ":8080"
+
+	cwd, err = os.Getwd()
+	dbPath = path.Join(cwd, "var/hat.db")
+	dbDir = path.Dir(dbPath)
+
+	if _, err = os.Stat(dbDir); os.IsNotExist(err) {
+		err = os.Mkdir(dbDir, 0700)
+		if err != nil {
+			fmt.Printf("boltdb: %s\n", err)
+		}
+	}
+
 	if len(os.Args) > 1 {
 		bind = os.Args[1]
 	}
-	server := &haberdasherserver.Server{}
+
+	fmt.Printf("boltdb: %s\n", dbPath)
+
+	server := &haberdasherserver.Server{DBPath: dbPath}
 	twirpHandler := haberdasher.NewHaberdasherServer(server)
 
 	http.ListenAndServe(bind, twirpHandler)

internal/haberdasherserver/server.go

@@ -16,7 +16,9 @@ import (
 
 const dbBucket = "hats"
 
-type Server struct{}
+type Server struct {
+	DBPath string
+}
 
 type Hat struct {
 	Inches int32  `json:"inchues"`
@@ -64,7 +66,7 @@ func HatQueryToHatQueryModel(q *pb.HatQuery) HatQuery {
 }
 
 func (s *Server) MakeHat(ctx context.Context, size *pb.Size) (hat *pb.Hat, err error) {
-	st, _ := NewStore("hat.db", 0600, nil)
+	st, _ := NewStore(s.DBPath, 0600, nil)
 	defer st.Close()
 
 	if size.Inches <= 0 {
@@ -85,7 +87,7 @@ func (s *Server) MakeHat(ctx context.Context, size *pb.Size) (hat *pb.Hat, err e
 }
 
 func (s *Server) ListHats(ctx context.Context, q *pb.HatQuery) (hats *pb.Hats, err error) {
-	st, _ := NewStore("hat.db", 0600, nil)
+	st, _ := NewStore(s.DBPath, 0600, nil)
 	defer st.Close()
 
 	hs, err := st.ListHats(HatQueryToHatQueryModel(q))