From ec54f0d9adb50baa14eae44a1b8c410f794d32de Mon Sep 17 00:00:00 2001
From: Win Treese <treese@acm.org>
Date: Fri, 5 Feb 2010 22:02:43 -0500
Subject: [PATCH] Make sure that <prefix> exists when splitting.

And test cases for that check, as well as for an error if no prefix is
specified at all.
---
 git-subtree.sh | 5 +++++
 test.sh        | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/git-subtree.sh b/git-subtree.sh
index 009c0db9b..52d4c0aeb 100755
--- a/git-subtree.sh
+++ b/git-subtree.sh
@@ -105,6 +105,11 @@ esac
 if [ -z "$prefix" ]; then
 	die "You must provide the --prefix option."
 fi
+
+if [ "$command" = "split" -a """"! -e "$prefix" ]; then
+	die "$prefix does not exist."
+fi
+
 dir="$(dirname "$prefix/.")"
 
 if [ "$command" != "pull" ]; then
diff --git a/test.sh b/test.sh
index cfe3a3c25..d0a2c86c2 100755
--- a/test.sh
+++ b/test.sh
@@ -140,6 +140,14 @@ git subtree merge --prefix=subdir FETCH_HEAD
 git branch pre-split
 check_equal "$(last_commit_message)" "Merge commit '$(git rev-parse sub2)' into mainline"
 
+# Check that prefix argument is required for split (exits with warning and exit status = 1)
+! result=$(git subtree split 2>&1)
+check_equal "You must provide the --prefix option." "$result"
+
+# Check that the <prefix> exists for a split.
+! result=$(git subtree split --prefix=non-existent-directory 2>&1)
+check_equal "non-existent-directory does not exist." "$result"
+
 # check if --message works for split+rejoin
 spl1=$(git subtree split --annotate='*' --prefix subdir --onto FETCH_HEAD --message "Split & rejoin" --rejoin)
 echo "spl1={$spl1}"
-- 
2.26.2