[src/trunk]: src/distrib/sets In "make sortlists", if the file was already so...

[apb <apb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cd21c4656f0e
branches:  trunk
changeset: 791008:cd21c4656f0e
user:      apb <apb%NetBSD.org@localhost>
date:      Wed Oct 30 15:17:01 2013 +0000

description:
In "make sortlists", if the file was already sorted then don't
change its timestamp.

diffstat:

 distrib/sets/Makefile |  11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diffs (25 lines):

diff -r 6077521506da -r cd21c4656f0e distrib/sets/Makefile
--- a/distrib/sets/Makefile     Wed Oct 30 15:15:12 2013 +0000
+++ b/distrib/sets/Makefile     Wed Oct 30 15:17:01 2013 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile,v 1.89 2013/10/27 09:29:42 apb Exp $
+#      $NetBSD: Makefile,v 1.90 2013/10/30 15:17:01 apb Exp $
 
 # Experimental RCS METALOG versioning
 # (Needs host's rcs(1) commands)
@@ -314,8 +314,13 @@
            ${_MKSHMSG} "sorting $${f#${.CURDIR}/}" ; \
            { grep '^#' "$$f" ; \
              grep -v '^#' "$$f" | sort ; \
-           } >"$$f".tmp \
-           && mv "$$f".tmp "$$f" ; \
+           } >"$$f".tmp; \
+           if cmp "$$f" "$$f".tmp >/dev/null; then \
+             : "$$f is unchanged" ; \
+             rm "$$f".tmp ; \
+           else \
+             mv "$$f".tmp "$$f" ; \
+           fi ; \
          done
 
 #