#! /usr/bin/env perl

Copyright 2019-2022 The Inspektor Gadget authors

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

use IPC::Open3; use strict; use warnings;

my $kubectl_gadget_path; my $readme_path; my $readme_line; my $fd;

$kubectl_gadget_path = shift or die "Usage: $0 relative_path_to_kubectl_gadget path_to_README"; $readme_path = shift or die "Usage: $0 path_to_kubectl_gadget path_to_README";

if (substr($kubectl_gadget_path, 0, 1) ne '.') { die "kubectl-gadget must be relative path: ${kubectl_gadget_path}"; }

open $fd, '<', $readme_path or die "Can not open ${readme_path}: $!";

while ($readme_line = <$fd>) { my $exit_status; my @out_lines; my $out_line; my $out; my $err; my $pid;

if ($readme_line !~ m/^\$ kubectl gadget (\w+)? ?--help$/) {
	next;
}

if (defined $1) {
	$pid = open3(undef, $out, $err, $kubectl_gadget_path, $1, '--help');
} else {
	$pid = open3(undef, $out, $err, $kubectl_gadget_path, '--help');
}

waitpid $pid, 0;

$exit_status = $! >> 8;
if ($exit_status != 0) {
	my $err_output;
	my $err_line;

	close $fd or warn "Problem while closing ${readme_path}: $!";

	while ($err_line = <$err>) {
		$err_output .= $err_line;
	}

	die "Problem while running ${kubectl_gadget_path}: ${err_output}";
}

while ($out_line = <$out>) {
	chomp $out_line;

	$readme_line = <$fd>;
	chomp $readme_line;
	if ($readme_line =~ m/\.\.\./) {
		last;
	}

	if ($readme_line ne $out_line) {
		close $fd or warn "Problem while closing ${readme_path}: $!";

		die "Lines do not match: \"${out_line}\" != \"${readme_line}\"";
	}
}

}

close $fd or warn "Problem while closing ${readme_path}: $!";