From 688284043c0feeed5177dd9ae15f273a172b755c Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Date: Fri, 12 Jun 2020 23:57:37 +0200
Subject: [PATCH] lint: Prevent a false positive

* lisp/org-lint.el (org-lint-deprecated-header-syntax): DIR property
is also meaningful in attachments, so don't warn about header-args
prefix.

Reported-by: Gustavo Barros <gusbrs.2016@gmail.com>
<http://lists.gnu.org/r/emacs-orgmode/2020-06/msg00270.html>
---
 lisp/org-lint.el | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lisp/org-lint.el b/lisp/org-lint.el
index a515b246d..5c5e642ac 100644
--- a/lisp/org-lint.el
+++ b/lisp/org-lint.el
@@ -423,8 +423,10 @@ instead"
 
 (defun org-lint-deprecated-header-syntax (ast)
   (let* ((deprecated-babel-properties
-	  (mapcar (lambda (arg) (symbol-name (car arg)))
-		  org-babel-common-header-args-w-values))
+	  ;; DIR is also used for attachments.
+	  (delete "dir"
+		  (mapcar (lambda (arg) (downcase (symbol-name (car arg))))
+			  org-babel-common-header-args-w-values)))
 	 (deprecated-re
 	  (format "\\`%s[ \t]" (regexp-opt deprecated-babel-properties t))))
     (org-element-map ast '(keyword node-property)