cli/reply: reduce the reply format abstractions

Now that we've made the various reply formats quite similar to each
other, there's no point in keeping the abstractions. They are now
close enough to be put in one function.

For now, a mime node will be uselessly created for the headers-only
case, but this is insignificant, and may change in the future.

notmuch-reply.c

@@ -599,92 +599,6 @@ create_reply_message(void *ctx,
     return reply;
 }
 
-static int
-notmuch_reply_format_default(void *ctx,
-			     notmuch_config_t *config,
-			     notmuch_message_t *message,
-			     notmuch_show_params_t *params,
-			     notmuch_bool_t reply_all,
-			     unused (sprinter_t *sp))
-{
-    GMimeMessage *reply;
-    mime_node_t *node;
-
-    if (mime_node_open (ctx, message, &params->crypto, &node))
-	return 1;
-
-    reply = create_reply_message (ctx, config, message, reply_all, FALSE);
-    if (!reply)
-	return 1;
-
-    show_reply_headers (reply);
-    format_part_reply (node);
-
-    g_object_unref (G_OBJECT (reply));
-    talloc_free (node);
-
-    return 0;
-}
-
-static int
-notmuch_reply_format_sprinter(void *ctx,
-			      notmuch_config_t *config,
-			      notmuch_message_t *message,
-			      notmuch_show_params_t *params,
-			      notmuch_bool_t reply_all,
-			      sprinter_t *sp)
-{
-    GMimeMessage *reply;
-    mime_node_t *node;
-
-    if (mime_node_open (ctx, message, &params->crypto, &node))
-	return 1;
-
-    reply = create_reply_message (ctx, config, message, reply_all, FALSE);
-    if (!reply)
-	return 1;
-
-    sp->begin_map (sp);
-
-    /* The headers of the reply message we've created */
-    sp->map_key (sp, "reply-headers");
-    format_headers_sprinter (sp, reply, TRUE);
-
-    /* Start the original */
-    sp->map_key (sp, "original");
-    format_part_sprinter (ctx, sp, node, TRUE, TRUE, FALSE);
-
-    /* End */
-    sp->end (sp);
-
-    g_object_unref (G_OBJECT (reply));
-    talloc_free (node);
-
-    return 0;
-}
-
-/* This format is currently tuned for a git send-email --notmuch hook */
-static int
-notmuch_reply_format_headers_only(void *ctx,
-				  notmuch_config_t *config,
-				  notmuch_message_t *message,
-				  unused (notmuch_show_params_t *params),
-				  notmuch_bool_t reply_all,
-				  unused (sprinter_t *sp))
-{
-    GMimeMessage *reply;
-
-    reply = create_reply_message (ctx, config, message, reply_all, TRUE);
-    if (!reply)
-	return 1;
-
-    show_reply_headers (reply);
-
-    g_object_unref (G_OBJECT (reply));
-
-    return 0;
-}
-
 enum {
     FORMAT_DEFAULT,
     FORMAT_JSON,
@@ -698,17 +612,12 @@ static int do_reply(notmuch_config_t *config,
 		    int format,
 		    notmuch_bool_t reply_all)
 {
+    GMimeMessage *reply;
+    mime_node_t *node;
     notmuch_messages_t *messages;
     notmuch_message_t *message;
     notmuch_status_t status;
     struct sprinter *sp = NULL;
-    int ret = 0;
-    int (*reply_format_func) (void *ctx,
-			      notmuch_config_t *config,
-			      notmuch_message_t *message,
-			      notmuch_show_params_t *params,
-			      notmuch_bool_t reply_all,
-			      struct sprinter *sp);
 
     if (format == FORMAT_JSON || format == FORMAT_SEXP) {
 	unsigned count;
@@ -721,18 +630,11 @@ static int do_reply(notmuch_config_t *config,
 	    fprintf (stderr, "Error: search term did not match precisely one message (matched %d messages).\n", count);
 	    return 1;
 	}
-    }
 
-    if (format == FORMAT_HEADERS_ONLY) {
+	if (format == FORMAT_JSON)
-	reply_format_func = notmuch_reply_format_headers_only;
-    } else if (format == FORMAT_JSON) {
-	reply_format_func = notmuch_reply_format_sprinter;
 	    sp = sprinter_json_create (config, stdout);
-    } else if (format == FORMAT_SEXP) {
+	else
-	reply_format_func = notmuch_reply_format_sprinter;
 	    sp = sprinter_sexp_create (config, stdout);
-    } else {
-	reply_format_func = notmuch_reply_format_default;
     }
 
     status = notmuch_query_search_messages_st (query, &messages);
@@ -745,15 +647,40 @@ static int do_reply(notmuch_config_t *config,
     {
 	message = notmuch_messages_get (messages);
 
-	ret = reply_format_func(config, config, message, params, reply_all, sp);
+	if (mime_node_open (config, message, &params->crypto, &node))
+	    return 1;
 
-	notmuch_message_destroy (message);
+	reply = create_reply_message (config, config, message, reply_all,
+				      format == FORMAT_HEADERS_ONLY);
+	if (!reply)
+	    return 1;
 
-	if (ret)
+	if (format == FORMAT_JSON || format == FORMAT_SEXP) {
-	    break;
+	    sp->begin_map (sp);
+
+	    /* The headers of the reply message we've created */
+	    sp->map_key (sp, "reply-headers");
+	    format_headers_sprinter (sp, reply, TRUE);
+
+	    /* Start the original */
+	    sp->map_key (sp, "original");
+	    format_part_sprinter (config, sp, node, TRUE, TRUE, FALSE);
+
+	    /* End */
+	    sp->end (sp);
+	} else {
+	    show_reply_headers (reply);
+	    if (format == FORMAT_DEFAULT)
+		format_part_reply (node);
 	}
 
-    return ret;
+	g_object_unref (G_OBJECT (reply));
+	talloc_free (node);
+
+	notmuch_message_destroy (message);
+    }
+
+    return 0;
 }
 
 int