cli can pass -db /path/to/sql.db

src/cmd/config.go

@@ -2,12 +2,33 @@ package cmd
 
 import (
 	"context"
+	"flag"
+	"os"
 	"show-rss/src/cleanup"
 	"show-rss/src/db"
 )
 
-func Config(ctx context.Context) (context.Context, func(), error) {
-	ctx, err := db.Inject(ctx, "/tmp/f.db")
+type Flags struct {
+	DB string
+}
+
+func NewFlags(args []string) (Flags, error) {
+	var result Flags
+
+	fs := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
+	fs.StringVar(&result.DB, "db", "/tmp/f.db", "path to sqlite.db")
+	err := fs.Parse(args)
+
+	return result, err
+}
+
+func Config(ctx context.Context, args []string) (context.Context, func(), error) {
+	flags, err := NewFlags(args)
+	if err != nil {
+		return ctx, nil, err
+	}
+
+	ctx, err = db.Inject(ctx, flags.DB)
 	if err != nil {
 		return ctx, nil, err
 	}

src/cmd/main.go

@@ -10,11 +10,11 @@ import (
 	"time"
 )
 
-func Main(ctx context.Context) error {
+func Main(ctx context.Context, args []string) error {
 	ctx, can := context.WithCancel(ctx)
 	defer can()
 
-	ctx, can, err := Config(ctx)
+	ctx, can, err := Config(ctx, args)
 	if err != nil {
 		return fmt.Errorf("failed to inject: %w", err)
 	}