checkpatch: add "contrib/scripts/checkpatch-feature-branch.sh" script

This takes current HEAD branch, and finds all the commits what
are not on master or one of the nm-1-* branches, and runs
checkpatch.pl on each.

The use is to run checkpatch.pl on all patches of a feature
branch.

2 files changed, 39 insertions, 0 deletions

diff --git a/contrib/scripts/checkpatch-feature-branch.sh b/contrib/scripts/checkpatch-feature-branch.sh
new file mode 100755
index 0000000000..6741317be2
--- /dev/null
+++ b/contrib/scripts/checkpatch-feature-branch.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+die() {
+	printf "%s\n" "$@"
+	exit 1
+}
+
+HEAD="${1:-HEAD}"
+
+BASE_DIR="$(dirname "$0")"
+
+BASE_REF="refs/remotes/origin/"
+
+RANGES=( $(git show-ref | sed 's#^\(.*\) '"$BASE_REF"'\(master\|nm-1-[0-9]\+\)$#\1..'"$HEAD"'#p' -n) )
+
+[ "${#RANGES[@]}" != 0 ] || die "cannot detect git-ranges (HEAD is $(git rev-parse HEAD))"
+
+REFS=( $(git log --reverse --format='%H' "${RANGES[@]}") )
+
+[ "${#REFS[@]}" != 0 ] || die "no refs detected (HEAD is $(git rev-parse HEAD))"
+
+SUCCESS=0
+for H in ${REFS[@]}; do
+    export NM_CHECKPATCH_HEADER=$'\n'">>> VALIDATE \"$(git log --oneline -n1 "$H")\""
+    git format-patch -U65535 --stdout -1 "$H" | "$BASE_DIR/checkpatch.pl"
+    if [ $? != 0 ]; then
+        SUCCESS=1
+    fi
+done
+
+exit $SUCCESS
diff --git a/contrib/scripts/checkpatch.pl b/contrib/scripts/checkpatch.pl
index 0769273bcb..67ffbc4256 100755
--- a/contrib/scripts/checkpatch.pl
+++ b/contrib/scripts/checkpatch.pl
@@ -72,11 +72,19 @@ sub new_file
 	@functions_seen = ();
 }
 
+my $header = $ENV{'NM_CHECKPATCH_HEADER'};
+
 sub complain
 {
 	my $message = shift;
 
 	return unless $check_line;
+
+	if (defined($header)) {
+		warn "$header\n";
+		undef $header;
+	}
+
 	warn "$filename:$line_no: $message:\n";
 	warn "> $line\n\n";
 	$seen_error = 1;