[media] docs-rst: parse-headers.pl: make debug a command line option

Add a parser for the --debug option, in order to allow
seeing what the parser is doing.

Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/Documentation/sphinx/parse-headers.pl b/Documentation/sphinx/parse-headers.pl
index 74089b0da798..531c710fc73f 100755
--- a/Documentation/sphinx/parse-headers.pl
+++ b/Documentation/sphinx/parse-headers.pl
@@ -2,12 +2,18 @@
 use strict;
 use Text::Tabs;
 
-# Uncomment if debug is needed
-#use Data::Dumper;
-
-# change to 1 to generate some debug prints
 my $debug = 0;
 
+while ($ARGV[0] =~ m/^-(.*)/) {
+        my $cmd = shift @ARGV;
+        if ($cmd eq "--debug") {
+                require Data::Dumper;
+                $debug = 1;
+                next;
+        }
+        die "argument $cmd unknown";
+}
+
 if (scalar @ARGV < 2 || scalar @ARGV > 3) {
         die "Usage:\n\t$0 <file in> <file out> [<exceptions file>]\n";
 }