Fixed regression with splitting out new subtree

A folder in a repository that wasn't initially imported as a  subtree could no longer be splitted into an entirely new subtree with no parent.

A fix and a new test to fix that regression is added here.

diff --git a/git-subtree.sh b/git-subtree.sh
index b7c350107e6edc8032eba76d5d74e56628bffd82..a86cfd8b9f8fd9a50e577f0612fea7a7a2b90213 100755 (executable)
--- a/git-subtree.sh
+++ b/git-subtree.sh
@@ -253,6 +253,7 @@ find_existing_splits()
                                if [ -n "$main" -a -n "$sub" ]; then
                                        debug "  Prior: $main -> $sub"
                                        cache_set $main $sub
+                                       cache_set $sub $sub
                                        try_remove_previous "$main"
                                        try_remove_previous "$sub"
                                fi
@@ -569,7 +570,9 @@ cmd_split()
                # ugly.  is there no better way to tell if this is a subtree
                # vs. a mainline commit?  Does it matter?
                if [ -z $tree ]; then
-                       cache_set $rev $rev
+                       if [ -n "$newparents" ]; then
+                               cache_set $rev $rev
+                       fi
                        continue
                fi
 

diff --git a/test.sh b/test.sh
index 8c1f1ea6bdfe6934dfc0e67112dc6a97f82065bc..45237c337492a4deefe918662967faf4add2e9f8 100755 (executable)
--- a/test.sh
+++ b/test.sh
@@ -294,6 +294,15 @@ git subtree split --prefix subdir --branch mainsub4
 # but it wasn't, because it's cache was not set to itself)
 check_equal "$(git log --pretty=format:%P -1 mainsub4)" "$(git rev-parse sub3)"
 
+mkdir subdir2
+create subdir2/main-sub5
+git commit -m "main-sub5"
+git subtree split --prefix subdir2 --branch mainsub5
+
+# also test that we still can split out an entirely new subtree
+# if the parent of the first commit in the tree isn't empty,
+# then the new subtree has accidently been attached to something
+check_equal "$(git log --pretty=format:%P -1 mainsub5)" ""
 
 
 # make sure no patch changes more than one file.  The original set of commits