Variable: org-publish-use-timestamps-flag
org-publish-use-timestamps-flag is a customizable variable defined in
ox-publish.el.gz.
Value
t
Documentation
Non-nil means use timestamp checking to publish only changed files.
When nil, do no timestamp checking and always publish all files.
Source Code
;; Defined in /usr/src/emacs/lisp/org/ox-publish.el.gz
(defcustom org-publish-use-timestamps-flag t
"Non-nil means use timestamp checking to publish only changed files.
When nil, do no timestamp checking and always publish all files."
:group 'org-export-publish
:type 'boolean)