ox: Ignore export settings in commented subtrees

* lisp/ox.el (org-export--delete-commented-subtrees): New function.
(org-export-as): Use new function.

* testing/lisp/test-ox.el (org-test-with-parsed-data,
  test-org-export/get-inbuffer-options): Use new function.
(test-org-export/expand-macro): Add tests.

Reported-by: Andreas Leha <andreas.leha@med.uni-goettingen.de>
<http://permalink.gmane.org/gmane.emacs.orgmode/96267>

lisp/ox.el

@@ -2665,6 +2665,16 @@ The function assumes BUFFER's major mode is `org-mode'."
 	      (overlays-in (point-min) (point-max)))
 	     ov-set)))))
 
+(defun org-export--delete-commented-subtrees ()
+  "Delete commented subtrees or inlinetasks in the buffer."
+  (org-with-wide-buffer
+   (goto-char (point-min))
+   (let ((regexp (concat org-outline-regexp-bol org-comment-string)))
+     (while (re-search-forward regexp nil t)
+       (delete-region
+	(line-beginning-position)
+	(org-element-property :end (org-element-at-point)))))))
+
 (defun org-export--prune-tree (data info)
   "Prune non exportable elements from DATA.
 DATA is the parse tree to traverse.  INFO is the plist holding
@@ -2855,6 +2865,7 @@ Return code as a string."
 	 (run-hook-with-args 'org-export-before-processing-hook
 			     (org-export-backend-name backend))
 	 (org-export-expand-include-keyword)
+	 (org-export--delete-commented-subtrees)
 	 ;; Update macro templates since #+INCLUDE keywords might have
 	 ;; added some new ones.
 	 (org-macro-initialize-templates)

testing/lisp/test-ox.el

@@ -48,6 +48,7 @@ body to execute.  Parse tree is available under the `tree'
 variable, and communication channel under `info'."
   (declare (debug (form body)) (indent 1))
   `(org-test-with-temp-text ,data
+     (org-export--delete-commented-subtrees)
      (let* ((tree (org-element-parse-buffer))
 	    (info (org-export-get-environment)))
        (org-export--prune-tree tree info)
@@ -187,7 +188,16 @@ variable, and communication channel under `info'."
 			  :options '((:k1 "KEYWORD")
 				     (:k2 "KEYWORD")))))
 	    (org-test-with-temp-text "#+KEYWORD: value"
-	      (org-export--get-inbuffer-options backend))))))
+	      (org-export--get-inbuffer-options backend)))))
+  ;; Keywords in commented subtrees are ignored.
+  (should-not
+   (equal "Me"
+	  (org-test-with-parsed-data "* COMMENT H1\n#+AUTHOR: Me"
+	    (plist-get info :author))))
+  (should-not
+   (equal "Mine"
+	  (org-test-with-parsed-data "* COMMENT H1\n** H2\n#+EMAIL: Mine"
+	    (plist-get info :email)))))
 
 (ert-deftest test-org-export/get-subtree-options ()
   "Test setting options from headline's properties."
@@ -1107,13 +1117,26 @@ Footnotes[fn:2], foot[fn:test], digit only[3], and [fn:inline:anonymous footnote
   ;; Date macro takes a optional formatting argument
   (should
    (equal "09-02-15\n"
-    (org-test-with-temp-text "{{{date(%d-%m-%y)}}}\n* d :noexport:\n#+DATE: <2015-02-09>"
-      (org-export-as (org-test-default-backend)))))
+	  (org-test-with-temp-text "{{{date(%d-%m-%y)}}}\n* d :noexport:\n#+DATE: <2015-02-09>"
+	    (org-export-as (org-test-default-backend)))))
   ;; Only single timestamps are formatted
   (should
    (equal "<2015-02x-09>\n"
-    (org-test-with-temp-text "{{{date(%d-%m-%y)}}}\n* d :noexport:\n#+DATE: <2015-02x-09>"
-      (org-export-as (org-test-default-backend))))))
+	  (org-test-with-temp-text "{{{date(%d-%m-%y)}}}\n* d :noexport:\n#+DATE: <2015-02x-09>"
+	    (org-export-as (org-test-default-backend)))))
+  ;; Throw an error when a macro definition is missing.
+  (should-error
+   (org-test-with-temp-text "{{{missing}}}"
+     (org-export-as (org-test-default-backend))))
+  ;; Macros defined in commented subtrees are ignored.
+  (should-error
+   (org-test-with-temp-text
+       "* COMMENT H\n#+MACRO: macro1\n* H2\nvalue\n{{{macro1}}}"
+     (org-export-as (org-test-default-backend))))
+  (should-error
+   (org-test-with-temp-text
+       "* COMMENT H\n** H2\n#+MACRO: macro1\n* H3\nvalue\n{{{macro1}}}"
+     (org-export-as (org-test-default-backend)))))
 
 (ert-deftest test-org-export/before-processing-hook ()
   "Test `org-export-before-processing-hook'."