[PATCH V5 1/3] t/t1517: automate `git subcmd -h` tests outside a repository

[Usman Akinyemi <usmanakinyemi202@gmail.com>]

Replace manual `-h` tests with a loop over all subcommands using
`git --list-cmds=main`. This ensures consistent coverage of `-h`
behavior outside a repo and future-proofs the test by covering
new commands automatically.

Known exceptions are skipped or marked as expected failures.

Suggested-by: Patrick Steinhardt <ps@pks.im>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: D. Ben Knoble <ben.knoble+github@gmail.com>
Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>
---
 t/t1517-outside-repo.sh | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/t/t1517-outside-repo.sh b/t/t1517-outside-repo.sh
index 8f59b867f2..4a827b96f0 100755
--- a/t/t1517-outside-repo.sh
+++ b/t/t1517-outside-repo.sh
@@ -109,8 +109,6 @@ test_expect_success LIBCURL 'remote-http outside repository' '
 
 test_expect_success 'update-server-info does not crash with -h' '
 	test_expect_code 129 git update-server-info -h >usage &&
-	test_grep "[Uu]sage: git update-server-info " usage &&
-	test_expect_code 129 nongit git update-server-info -h >usage &&
 	test_grep "[Uu]sage: git update-server-info " usage
 '
 
@@ -120,5 +118,26 @@ test_expect_success 'prune does not crash with -h' '
 	test_expect_code 129 nongit git prune -h >usage &&
 	test_grep "[Uu]sage: git prune " usage
 '
+for cmd in $(git --list-cmds=main)
+do
+	cmd=${cmd%.*} # strip .sh, .perl, etc.
+	case "$cmd" in
+	archimport | cvsexportcommit | cvsimport | cvsserver | daemon | \
+	difftool--helper | filter-branch | fsck-objects | get-tar-commit-id | \
+	http-backend | http-fetch | http-push | init-db | \
+	merge-octopus | merge-one-file | merge-resolve | mergetool | \
+	mktag | p4 | p4.py | pickaxe | remote-ftp | remote-ftps | \
+	remote-http | remote-https | replay | send-email | \
+	sh-i18n--envsubst | shell | show | stage | submodule | svn | \
+	upload-archive--writer | upload-pack | web--browse | whatchanged)
+		expect_outcome=expect_failure ;;
+	*)
+		expect_outcome=expect_success ;;
+	esac
+	test_$expect_outcome "'git $cmd -h' outside a repository" '
+		test_expect_code 129 nongit git $cmd -h >usage &&
+		test_grep "[Uu]sage: git $cmd " usage
+	'
+done
 
 test_done
-- 
2.50.1