[svn-r5058] Purpose:

Feature/bug fix
Description:
    The 'snapshot diff' command is run in all cases, even after the initial
    "snapshot diff" and hosts are polled to run the test.  It would not cause
    any harm except wasting time repeating diff'ing.  Also, the path is
    quite right to invoke snapshot by merely "bin/snapshot diff" since it
    has not "cd" to the right directory yet.
Solution:
    Added a new option of "-nodiff" to skip the special diff request.
    Then make "runtest" to call itself again with it to prevent
    any further unnecessary diff'ing.
Platforms tested:
    eirene

bin/runtest

@@ -422,7 +422,7 @@ FLUSH_FILES()
 USAGE()
 {
 cat <<EOF
-Usage: runtest [-h] [-debug] [-r<version>] [-all] [-nocvs] [<host> ...]
+Usage: runtest [-h] [-debug] [-r<version>] [-all] [-nocvs] [-nodiff] [<host> ...]
     -h
 	print this help page
     -debug
@@ -433,6 +433,8 @@ Usage: runtest [-h] [-debug] [-r<version>] [-all] [-nocvs] [<host> ...]
 	launch tests for all pre-defined testing hosts
     -nocvs
 	do not do cvs commands
+    -nodiff
+	do not do diff commands
     <host>
 	launch tests for <host>
     
@@ -481,6 +483,10 @@ while [ $# -gt 0 ]; do
 	    # do not do cvs commands
 	    NOCVS=nocvs
 	    ;;
+	-nodiff)
+	    # do not do diff commands
+	    NODIFF=nodiff
+	    ;;
 	-*) # Unknow option
 	    PRINT "Unknown option ($1)"
 	    USAGE
@@ -599,17 +605,20 @@ fi
 
 # run a snapshot diff to see if any significant differences between
 # the current and previous versions
-($SNAPSHOT diff ) >> $DIFFLOG 2>&1
-errcode=$?
-if [ $errcode -eq 0 ]; then
-    # no need to run test
-    PRINT "NO TEST: no significant differences between current and previous versions" |
-        tee -a $PASSEDLOG
-    exit 0
+if [ -z "$NODIFF" ]; then
+    $SNAPSHOT diff >> $DIFFLOG 2>&1
+    errcode=$?
+    if [ $errcode -eq 0 ]; then
+	# no need to run test
+	PRINT "NO TEST: no significant differences between current and previous versions" |
+	    tee -a $PASSEDLOG
+	exit 0
+    fi
 fi
 
 # we can use the version of script in SNAPYARD/current now
-PROGNAME="$SNAPYARD/current/$PROGNAME"
+# Don't do the diff any more.
+PROGNAME="$SNAPYARD/current/$PROGNAME -nodiff"
 
 # Decide to do test for the local host or for remote hosts
 if [ -n "$TESTHOST" -a $HOSTNAME != "$TESTHOST" ]; then