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2020-10-21perl: check for perl warnings while running testsLibravatar Jeff King2-2/+2
We set "use warnings" in most of our perl code to catch problems. But as the name implies, warnings just emit a message to stderr and don't otherwise affect the program. So our tests are quite likely to miss that warnings are being spewed, as most of them do not look at stderr. We could ask perl to make all warnings fatal, but this is likely annoying for non-developers, who would rather have a running program with a warning than something that refuses to work at all. So instead, let's teach the perl code to respect an environment variable (GIT_PERL_FATAL_WARNINGS) to increase the severity of the warnings. This can be set for day-to-day running if people want to be really pedantic, but the primary use is to trigger it within the test suite. We could also trigger that for every test run, but likewise even the tests failing may be annoying to distro builders, etc (just as -Werror would be for compiling C code). So we'll tie it to a special test-mode variable (GIT_TEST_PERL_FATAL_WARNINGS) that can be set in the environment or as a Makefile knob, and we'll automatically turn the knob when DEVELOPER=1 is set. That should give developers and CI the more careful view without disrupting normal users or packagers. Note that the mapping from the GIT_TEST_* form to the GIT_* form in test-lib.sh is necessary even if they had the same name: the perl scripts need it to be normalized to a perl truth value, and we also have to make sure it's exported (we might have gotten it from the environment, but we might also have gotten it from GIT-BUILD-OPTIONS directly). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05perl: generalize the Git::LoadCPAN facilityLibravatar Ævar Arnfjörð Bjarmason2-58/+8
Change the two wrappers that load from CPAN (local OS) or our own copy to do so via the same codepath. I added the Error.pm wrapper in 20d2a30f8f ("Makefile: replace perl/Makefile.PL with simple make rules", 2017-12-10), and shortly afterwards Matthieu Moy added a wrapper for Mail::Address in bd869f67b9 ("send-email: add and use a local copy of Mail::Address", 2018-01-05). His loader was simpler since Mail::Address doesn't have an "import" method, but didn't do the same sanity checking; For example, a missing FromCPAN directory (which OS packages are likely not to have) wouldn't be explicitly warned about as a "BUG: ...". Update both to use a common implementation based on the previous Error.pm loader. Which has been amended to take the module to load as parameter, as well as whether or not that module has an import method. This loader should be generic enough to handle almost all CPAN modules out there, some use some crazy loading magic and wouldn't like being wrapped like this, but that would be immediately obvious, and we'd find out right away since the module wouldn't work at all. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05perl: move CPAN loader wrappers to another namespaceLibravatar Ævar Arnfjörð Bjarmason2-0/+70
Move the Git::Error and Git::Mail::Address wrappers to the Git::LoadCPAN::Loader::* namespace, e.g. Git::LoadCPAN::Error. That module will then either load Error from CPAN (if installed on the OS), or use Git::FromCPAN::Error. When I added the Error wrapper in 20d2a30f8f ("Makefile: replace perl/Makefile.PL with simple make rules", 2017-12-10) I didn't think about how confusing it would be to have these modules sitting in the same tree as our normal modules. Let's put these all into Git::{Load,From}CPAN::* to clearly distinguish them from the rest. This also makes things a bit less confusing since there was already a Git::Error namespace ever since 8b9150e3e3 ("Git.pm: Handle failed commands' output", 2006-06-24). Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>