ktest: Add PATCHCHECK_CHERRY

Add a way to run a patchcheck test on the commits that are in one branch
but not in another. This uses git cherry to find a list of commits to
test each one with.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -194,6 +194,7 @@ my $config_bisect_check;
 
 my $patchcheck_type;
 my $patchcheck_start;
+my $patchcheck_cherry;
 my $patchcheck_end;
 
 # set when a test is something other that just building or install
@@ -320,6 +321,7 @@ my %option_map = (
 
     "PATCHCHECK_TYPE"		=> \$patchcheck_type,
     "PATCHCHECK_START"		=> \$patchcheck_start,
+    "PATCHCHECK_CHERRY"		=> \$patchcheck_cherry,
     "PATCHCHECK_END"		=> \$patchcheck_end,
 );
 
@@ -3181,9 +3183,16 @@ sub patchcheck {
 
     my $start = $patchcheck_start;
 
+    my $cherry = $patchcheck_cherry;
+    if (!defined($cherry)) {
+	$cherry = 0;
+    }
+
     my $end = "HEAD";
     if (defined($patchcheck_end)) {
 	$end = $patchcheck_end;
+    } elsif ($cherry) {
+	die "PATCHCHECK_END must be defined with PATCHCHECK_CHERRY\n";
     }
 
     # Get the true sha1's since we can use things like HEAD~3
@@ -3197,24 +3206,38 @@ sub patchcheck {
 	$type = "boot";
     }
 
-    open (IN, "git log --pretty=oneline $end|") or
-	dodie "could not get git list";
+    if ($cherry) {
+	open (IN, "git cherry -v $start $end|") or
+	    dodie "could not get git list";
+    } else {
+	open (IN, "git log --pretty=oneline $end|") or
+	    dodie "could not get git list";
+    }
 
     my @list;
 
     while (<IN>) {
 	chomp;
+	# git cherry adds a '+' we want to remove
+	s/^\+ //;
 	$list[$#list+1] = $_;
 	last if (/^$start/);
     }
     close(IN);
 
-    if ($list[$#list] !~ /^$start/) {
-	fail "SHA1 $start not found";
+    if (!$cherry) {
+	if ($list[$#list] !~ /^$start/) {
+	    fail "SHA1 $start not found";
+	}
+
+	# go backwards in the list
+	@list = reverse @list;
     }
 
-    # go backwards in the list
-    @list = reverse @list;
+    doprint("Going to test the following commits:\n");
+    foreach my $l (@list) {
+	doprint "$l\n";
+    }
 
     my $save_clean = $noclean;
     my %ignored_warnings;

tools/testing/ktest/sample.conf

@@ -906,6 +906,16 @@
 #
 #  PATCHCHECK_END is the last patch to check (default HEAD)
 #
+#  PATCHCHECK_CHERRY if set to non zero, then git cherry will be
+#      performed against PATCHCHECK_START and PATCHCHECK_END. That is
+#
+#      git cherry ${PATCHCHECK_START} ${PATCHCHECK_END}
+#
+#      Then the changes found will be tested.
+#
+#      Note, PATCHCHECK_CHERRY requires PATCHCHECK_END to be defined.
+#      (default 0)
+#
 #  PATCHCHECK_TYPE is required and is the type of test to run:
 #      build, boot, test.
 #