@@ -40,8 +40,8 @@ type Options struct {
 	Compress bool
 }
 
-func OpenDB(dbPath string) (*sql.DB, error) {
-	return sql.Open(
+func OpenDB(dbPath string) (*sql.DB, errors.E) {
+	db, err := sql.Open(
 		"sqlite",
 		fmt.Sprintf(
 			"file:%s?mode=%s&_pragma=foreign_keys(1)&_pragma=mmap_size(%d)",
@@ -50,9 +50,14 @@ "rwc",
 			16*1024*1024,
 		),
 	)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return db, nil
 }
 
-func NewWriter(db *sql.DB, logger *log.Logger, opts *Options) (*Writer, error) {
+func NewWriter(db *sql.DB, logger *log.Logger, opts *Options) (*Writer, errors.E) {
 	_, err := db.Exec(`
 		CREATE TABLE IF NOT EXISTS url (
 			url_id INTEGER PRIMARY KEY,
@@ -118,20 +123,25 @@
 	return w, nil
 }
 
-func (s *Writer) Mkdirp(string) error {
+func (s *Writer) Mkdirp(string) errors.E {
 	return nil
 }
 
-func (s *Writer) storeURL(path string) (int64, error) {
+func (s *Writer) storeURL(path string) (int64, errors.E) {
 	r, err := s.queries.insertURL.Exec(path)
 	if err != nil {
 		return 0, errors.WithMessagef(err, "inserting URL %s into database", path)
 	}
 
-	return r.LastInsertId()
+	id, err := r.LastInsertId()
+	if err != nil {
+		return 0, errors.WithStack(err)
+	}
+
+	return id, nil
 }
 
-func (s *Writer) storeFile(urlID int64, file *storage.File) (int64, error) {
+func (s *Writer) storeFile(urlID int64, file *storage.File) (int64, errors.E) {
 	if file.ContentType == "" {
 		file.ContentType = http.DetectContentType(file.Encodings["identity"].Bytes())
 		s.log.Warn(
@@ -154,10 +164,15 @@ if err != nil {
 		return 0, errors.WithMessage(err, "inserting file into database")
 	}
 
-	return r.LastInsertId()
+	id, err := r.LastInsertId()
+	if err != nil {
+		return 0, errors.WithStack(err)
+	}
+
+	return id, nil
 }
 
-func (s *Writer) storeEncoding(fileID int64, encoding string, data []byte) error {
+func (s *Writer) storeEncoding(fileID int64, encoding string, data []byte) errors.E {
 	_, err := s.queries.insertContent.Exec(
 		sql.Named("file_id", fileID),
 		sql.Named("encoding", encoding),
@@ -175,7 +190,7 @@
 	return nil
 }
 
-func etag(content []byte) (string, error) {
+func etag(content []byte) (string, errors.E) {
 	hash := fnv.New64a()
 	hash.Write(content)
 
@@ -197,13 +212,13 @@
 	return file
 }
 
-func (s *Writer) WritePost(post *content.Post, content *buffer.Buffer) error {
+func (s *Writer) WritePost(post *content.Post, content *buffer.Buffer) errors.E {
 	s.log.Debug("storing post", "title", post.Title)
 
 	return s.WriteFile(s.NewFileFromPost(post), content)
 }
 
-func (s *Writer) Write(pathname string, title string, content *buffer.Buffer) error {
+func (s *Writer) Write(pathname string, title string, content *buffer.Buffer) errors.E {
 	file := &storage.File{
 		Title:        title,
 		Path:         pathname,
@@ -214,7 +229,7 @@
 	return s.WriteFile(file, content)
 }
 
-func (s *Writer) WriteFile(file *storage.File, content *buffer.Buffer) error {
+func (s *Writer) WriteFile(file *storage.File, content *buffer.Buffer) errors.E {
 	s.log.Debug("storing content", "pathname", file.Path)
 
 	urlID, err := s.storeURL(file.Path)
@@ -271,15 +286,16 @@
 	return nil
 }
 
-func compress(encoding string, content *buffer.Buffer) (compressed *buffer.Buffer, err error) {
+func compress(encoding string, content *buffer.Buffer) (*buffer.Buffer, errors.E) {
 	var w io.WriteCloser
-	compressed = new(buffer.Buffer)
+	compressed := new(buffer.Buffer)
 	switch encoding {
 	case "gzip":
 		w = gzip.NewWriter(compressed)
 	case "br":
 		w = brotli.NewWriter(compressed)
 	case "zstd":
+		var err error
 		w, err = zstd.NewWriter(compressed)
 		if err != nil {
 			return nil, errors.WithMessage(err, "could not create zstd writer")
@@ -287,12 +303,10 @@ }
 	}
 	defer w.Close()
 
-	err = content.SeekStart()
-	if err != nil {
+	if err := content.SeekStart(); err != nil {
 		return nil, errors.WithMessage(err, "seeking to start of content buffer")
 	}
-	_, err = io.Copy(w, content)
-	if err != nil {
+	if _, err := io.Copy(w, content); err != nil {
 		return nil, errors.WithMessage(err, "compressing file")
 	}