maintenance: fix test t7900-maintenance.sh

Commit b681b191 introduced the support of systemd timers for git maintenance. A test is leveraging the `systemd-analyze verify` utility to verify the correctness of the systemd unit files generated by git. But on some systems, although the `systemd-analyze` tool is installed and supports the `verify` subcommand, it fails with some permission errors. So, instead of only checking if the `verify` subcommand exists, a more reliable way of detecting whether `systemd-analyze verify` can be used is to try to use it. The SYSTEMD_ANALYZE prerequisite is now trying to run `systemd-analyze verify` on a systemd unit file which is shipped by systemd itself. We can reasonably think that, on systemd hosts, this file is present and valid. Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Lénaïc Huard committed Sep 27, 2021 at 23:30 UTC 670e5973992b6126aa0841c3c6bc183f0cec749f
1 file changed +1 -2
t/t7900-maintenance.sh
+1 -2
@@ -21,8 +21,7 @@ test_xmllint () {
21 }
22
23 test_lazy_prereq SYSTEMD_ANALYZE '
24 - systemd-analyze --help >out &&
25 - grep verify out
24 + systemd-analyze verify /lib/systemd/system/basic.target
25 '
26
27 test_systemd_analyze_verify () {