From 2e50a00f6930f1c65ca804b78f4a853e2ae2d2c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Tue, 17 Nov 2020 17:13:31 +0100
Subject: [PATCH] test/udev-test: gracefully exit when imports fail

In Fedora rawhide various perl modules are now available as separate
packages that are not pulled in by dependencies. If we don't have some
package, skip the tests.

This ugly code is apparently the way to do conditional imports:
https://www.cs.ait.ac.th/~on/O/oreilly/perl/cookbook/ch12_03.htm.

(cherry picked from commit d40763838278246e2073d15ca927ee700e583afc)

Related: #1642728
---
 test/udev-test.pl | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/test/udev-test.pl b/test/udev-test.pl
index cf6ca6b80c..5b1e33504e 100755
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -18,11 +18,19 @@
 
 use warnings;
 use strict;
-use POSIX qw(WIFEXITED WEXITSTATUS);
-use IPC::SysV qw(IPC_PRIVATE S_IRUSR S_IWUSR IPC_CREAT);
-use IPC::Semaphore;
-use Time::HiRes qw(usleep);
-use Cwd qw(getcwd abs_path);
+
+BEGIN {
+    my $EXIT_TEST_SKIP = 77;
+
+    unless (eval "use POSIX qw(WIFEXITED WEXITSTATUS);
+                  use Cwd qw(getcwd abs_path);
+                  use IPC::Semaphore;
+                  use IPC::SysV qw(IPC_PRIVATE S_IRUSR S_IWUSR IPC_CREAT);
+                  use Time::HiRes qw(usleep); 1") {
+        warn "Failed to import dependencies, skipping the test: $@";
+        exit($EXIT_TEST_SKIP);
+    }
+}
 
 my $udev_bin            = "./test-udev";
 my $valgrind            = 0;