[PATCH 2/2] builtins: setup repository before print unknown command error

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

From: Duy Nguyen <pclouds@gmail.com>

help_unknown_cmd() will need to look into repository's config, in
order to collect all possible commands/aliases and give a
suggestion. So, repository must be set up before this function is
called.

As it is now, because
 - alias handling will always be done before help_unknown_cmd()
 - alias handling code will search and set up repository if found
 - alias handline code will not undo repository setup

These ensure that repository will always be set up (or attempted to
set up) before help_unknown_cmd(), so there is no issue. But the setup
dependency here is subtle. It may break some day if someone reorders
the loop, for example.

Make the repository setup explicit, to express it clearer, although
this code will never be run (It does not mean the code is not tested,
I removed alias handling code to reproduce the problem, and this code
helped fix it)

Signed-off-by: Duy Nguyen <pclouds@gmail.com>
---
 git.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/git.c b/git.c
index bd1d4bb..d84996c 100644
--- a/git.c
+++ b/git.c
@@ -547,6 +547,10 @@ int main(int argc, const char **argv)
 			exit(1);
 		}
 		if (!done_help) {
+			if (!startup_info->have_run_setup_gitdir) {
+				int nongit_ok;
+				setup_git_directory_gently(&nongit_ok);
+			}
 			cmd = argv[0] = help_unknown_cmd(cmd);
 			done_help = 1;
 		} else
-- 
1.7.0.rc1.541.g2da82.dirty