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>

2 files changed, 39 insertions, 6 deletions

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 55ab700f6ba5..3b7a180d9c0d 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/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;
diff --git a/tools/testing/ktest/sample.conf b/tools/testing/ktest/sample.conf
index 911e45ad657a..6c58cd8bbbae 100644
--- a/tools/testing/ktest/sample.conf
+++ b/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.
 #