cstyle.pl: echo commands for github workflow

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Melikov <mail@gmelikov.ru>
Closes #10705

scripts/cstyle.pl

@@ -58,8 +58,9 @@ use Getopt::Std;
 use strict;
 
 my $usage =
-"usage: cstyle [-chpvCP] [-o constructs] file ...
+"usage: cstyle [-cghpvCP] [-o constructs] file ...
 	-c	check continuation indentation inside functions
+	-g	print github actions' workflow commands
 	-h	perform heuristic checks that are sometimes wrong
 	-p	perform some of the more picky checks
 	-v	verbose
@@ -73,12 +74,13 @@ my $usage =
 
 my %opts;
 
-if (!getopts("cho:pvCP", \%opts)) {
+if (!getopts("cgho:pvCP", \%opts)) {
 	print $usage;
 	exit 2;
 }
 
 my $check_continuation = $opts{'c'};
+my $github_workflow = $opts{'g'} || $ENV{'CI'};
 my $heuristic = $opts{'h'};
 my $picky = $opts{'p'};
 my $verbose = $opts{'v'};
@@ -198,6 +200,9 @@ sub err($) {
 		} else {
 			printf $fmt, $filename, $., $error;
 		}
+		if ($github_workflow) {
+			printf "::error file=%s,line=%s::%s\n", $filename, $., $error;
+		}
 		$err_stat = 1;
 	}
 }