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help: include fsmonitor--daemon feature flag in version info 

Add the "feature: fsmonitor--daemon" message to the output of
`git version --build-options`.

The builtin FSMonitor is only available on certain platforms and
even then only when certain Makefile flags are enabled, so print
a message in the verbose version output when it is available.

This can be used by test scripts for prereq testing.  Granted, tests
could just try `git fsmonitor--daemon status` and look for a 128 exit
code or grep for a "not supported" message on stderr, but these
methods are rather obscure.

The main advantage is that the feature message will automatically
appear in bug reports and other support requests.

This concept was also used during the development of Scalar for
similar reasons.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff Hostetler 2022-03-25 18:03:02 +00:00 committed by Junio C Hamano
parent 518a522f40
commit dd77cf61a1
2 changed files with 11 additions and 0 deletions
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4
help.c
View File

@ -12,6 +12,7 @@
#include "refs.h"
#include "parse-options.h"
#include "prompt.h"
#include "fsmonitor-ipc.h"
struct category_description {
uint32_t category;
@ -695,6 +696,9 @@ void get_version_info(struct strbuf *buf, int show_build_options)
strbuf_addf(buf, "sizeof-size_t: %d\n", (int)sizeof(size_t));
strbuf_addf(buf, "shell-path: %s\n", SHELL_PATH);
/* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */
if (fsmonitor_ipc__is_supported())
strbuf_addstr(buf, "feature: fsmonitor--daemon\n");
}
}

7
t/test-lib.sh
View File

@ -1799,3 +1799,10 @@ test_lazy_prereq SHA1 '
# Tests that verify the scheduler integration must set this locally
# to avoid errors.
GIT_TEST_MAINT_SCHEDULER="none:exit 1"
# Does this platform support `git fsmonitor--daemon`
#
test_lazy_prereq FSMONITOR_DAEMON '
git version --build-options >output &&
grep "feature: fsmonitor--daemon" output
'