-;; Helper for parts which are generally not included in the default
-;; SEXP output.
-(defun notmuch-get-bodypart-internal (query part-number process-crypto)
- (let ((args '("show" "--format=raw"))
- (part-arg (format "--part=%s" part-number)))
- (setq args (append args (list part-arg)))
- (if process-crypto
- (setq args (append args '("--decrypt"))))
- (setq args (append args (list query)))
+(defun notmuch-get-bodypart-binary (msg part process-crypto)
+ "Return the unprocessed content of PART in MSG.
+
+This returns the \"raw\" content of the given part after content
+transfer decoding, but with no further processing (see the
+discussion of --format=raw in man notmuch-show). In particular,
+this does no charset conversion."
+ (let ((args `("show" "--format=raw"
+ ,(format "--part=%d" (plist-get part :id))
+ ,@(when process-crypto '("--decrypt"))
+ ,(notmuch-id-to-query (plist-get msg :id)))))