[PATCH] t7900: use pwd -P in macOS maintenance test

[Mark Mentovai <mark@chromium.org>]

$pfx is the basis for the expectation that launchd plist paths formed by
`git maintenance start` will be compared against. These paths are formed
in `git maintenance` by builtin/gc.c launchctl_service_filename(), which
calls path.c interpolate_path() with real_home = 1, causing abspath.c
strbuf_realpath() to resolve a canonical absolute path. Since $pfx is
not determined according to the same realpath semantics, when t7900 is
run from a working directory that contains a symbolic link in its path,
the realpath operation will produce a different path than $pfx contains,
although both paths logically reference the same directory. The test
fails in this case.

Base $pfx on the physical working directory (pwd -P), with all symbolic
links fully resolved, so that the path that the test expects matches
what `git maintenance` generates, even when running from a working
directory whose path contains a symbolic link.

Signed-off-by: Mark Mentovai <mark@chromium.org>
---
 t/t7900-maintenance.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index 8cf89e285f49..677e92f1490e 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -882,7 +882,7 @@ test_expect_success 'stop preserves surrounding schedule' '
 
 test_expect_success 'start and stop macOS maintenance' '
 	# ensure $HOME can be compared against hook arguments on all platforms
-	pfx=$(cd "$HOME" && pwd) &&
+	pfx=$(cd "$HOME" && pwd -P) &&
 
 	write_script print-args <<-\EOF &&
 	echo $* | sed "s:gui/[0-9][0-9]*:gui/[UID]:" >>args
-- 
2.49.0