[PATCH v5 1/7] git: esnure correct git directory setup with -h

["Lessley Dennington via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Lessley Dennington <lessleydennington@xxxxxxxxx>

Ensure correct git directory setup when -h is passed with commands. This
specifically applies to repos with special help text configuration
variables and to commands run with -h outside a repository. This
will also protect against test failures in the upcoming change to BUG in
prepare_repo_settings if no git directory exists.

Note: this diff is better seen when ignoring whitespace changes.

Co-authored-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Lessley Dennington <lessleydennington@xxxxxxxxx>
---
 git.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/git.c b/git.c
index 60c2784be45..03a2dfa5174 100644
--- a/git.c
+++ b/git.c
@@ -421,27 +421,28 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 	int status, help;
 	struct stat st;
 	const char *prefix;
-
+	int run_setup = (p->option & (RUN_SETUP | RUN_SETUP_GENTLY));
 	prefix = NULL;
 	help = argc == 2 && !strcmp(argv[1], "-h");
-	if (!help) {
-		if (p->option & RUN_SETUP)
-			prefix = setup_git_directory();
-		else if (p->option & RUN_SETUP_GENTLY) {
-			int nongit_ok;
-			prefix = setup_git_directory_gently(&nongit_ok);
-		}
-		precompose_argv_prefix(argc, argv, NULL);
-		if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
-		    !(p->option & DELAY_PAGER_CONFIG))
-			use_pager = check_pager_config(p->cmd);
-		if (use_pager == -1 && p->option & USE_PAGER)
-			use_pager = 1;
-
-		if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
-		    startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
-			trace_repo_setup(prefix);
+	if (help && (run_setup & RUN_SETUP))
+		/* demote to GENTLY to allow 'git cmd -h' outside repo */
+		run_setup = RUN_SETUP_GENTLY;
+
+	if (run_setup & RUN_SETUP)
+		prefix = setup_git_directory();
+	else if (run_setup & RUN_SETUP_GENTLY) {
+		int nongit_ok;
+		prefix = setup_git_directory_gently(&nongit_ok);
 	}
+	precompose_argv_prefix(argc, argv, NULL);
+	if (use_pager == -1 && run_setup &&
+		!(p->option & DELAY_PAGER_CONFIG))
+		use_pager = check_pager_config(p->cmd);
+	if (use_pager == -1 && p->option & USE_PAGER)
+		use_pager = 1;
+	if (run_setup && startup_info->have_repository)
+		/* get_git_dir() may set up repo, avoid that */
+		trace_repo_setup(prefix);
 	commit_pager_choice();
 
 	if (!help && get_super_prefix()) {
-- 
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