From b045c16cffe6eb86c157a6c7397166a46e147442 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Sun, 2 Dec 2012 10:24:46 -0500
Subject: [PATCH] submodule add: configure existing submodule url if not set

Note that relative repository arguments passed to

  $ git submodule add <repository> [<path>]

are expanded relative to the superproject's remote URL, not relative
to the current working directory.

Signed-off-by: W. Trevor King <wking@tremily.us>
---
 git-submodule.sh | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index dd00adb08..8b47db6a3 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -496,7 +496,18 @@ Use -f if you really want to add it." >&2
 		else
 			die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 		fi
-
+		# if the submodule's remote URL is not set, set it
+		up_path=$(get_up_path "$sm_path")
+		sub_url=$(join_urls "$up_path" "$realrepo")
+		(
+			clear_local_git_env
+			cd "$sm_path" &&
+			remote=$(get_default_remote) &&
+			if ! git config remote."$remote".url > /dev/null 2>/dev/null
+			then
+				git config remote."$remote".url "$sub_url"
+			fi
+		) || die "$(eval_gettext "Unable to configure submodule remote '\$sm_path'")"
 	else
 
 		module_clone "$sm_path" "$realrepo" "$reference" || exit
-- 
2.26.2