(Man-getpage-in-background): Force recent `man's to output

escape sequences even when stdout is not a tty.  (Bug#1142)

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/man.el b/lisp/man.el
index 353a9032992..5b77b0b12d6 100644
--- a/lisp/man.el
+++ b/lisp/man.el
@@ -829,6 +829,10 @@ all sections related to a subject, put something appropriate into the
                               (Man-width (frame-width))
                               ((window-width))))))
         (setenv "GROFF_NO_SGR" "1")
+        ;; Since man-db 2.4.3-1, man writes plain text with no escape
+        ;; sequences when stdout is not a tty.  In 2.5.0, the following
+        ;; env-var was added to allow control of this (see Debian Bug#340673).
+        (setenv "MAN_KEEP_FORMATTING" "1")
         (if (fboundp 'start-process)
             (set-process-sentinel
              (start-process manual-program buffer