build: add a qrefresh target, like commit for use with mq

Adds a qrefresh target to the top-level Makefile.  It's like commit, but
for use with the Hg mq extension.  It will execute hg qrefresh, so you
should have a current mq patch created with hg qnew already!

It will run the whitespace and cardlist scripts.  If you do not have a
commit message from the current mq patch, it will create a default one,
as make commit does.  If one already exists, then it will put a comment
at the beginning of the existing message with the current diffstat and a
note of any changes the whitespace script made.  The diffstat is done
with qdiff, which will show the total diffstat of the patch instead of
just the diffstat of from the last version of the patch to the current
version.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>

1 files changed, 18 insertions, 1 deletions

diff --git a/v4l/scripts/prep_commit_msg.pl b/v4l/scripts/prep_commit_msg.pl
index f4047c6ba..819009c57 100755
--- a/v4l/scripts/prep_commit_msg.pl
+++ b/v4l/scripts/prep_commit_msg.pl
@@ -1,5 +1,10 @@
 #!/usr/bin/perl
 
+my $diff = 'diff';
+if ($ARGV[0] eq '-q') {
+    $diff = 'qdiff';
+    shift;
+}
 my $autopatch = shift;
 
 # Get Hg username from environment
@@ -45,13 +50,25 @@ if ($user eq "") {
 }
 
 print "# Added/removed/changed files:\n";
-system "hg diff | diffstat -p1 -c";
+system "hg $diff | diffstat -p1 -c";
 if (-s $autopatch) {
 	print "#\n# Note, a problem with your patch was detected!  These changes were made\n";
 	print "# automatically: $autopatch\n";
 	system "diffstat -p0 -c $autopatch";
 	print "#\n# Please review these changes and see if they belong in your patch or not.\n";
 }
+if ($diff eq 'qdiff') {
+	# Use existing mq patch logfile?
+	open IN, "hg qheader |";
+	my @header = <IN>;
+	close IN;
+	if ($#header > 0) {
+		# Use existing header
+		print @header;
+		exit;
+	}
+	# No header, use pre-made log message below
+}
 print <<"EOF";
 #
 # For better log display, please keep a blank line after subject, after from,