Added a --onto option, but it's so complicated I can't tell if it works.

diff --git a/git-subtree.sh b/git-subtree.sh
index af1d332e24782b3afb374a46c735235027d38bfd..7e1707ae2afadacc6706731423ab28f06aa9f9d6 100755 (executable)
--- a/git-subtree.sh
+++ b/git-subtree.sh
@@ -13,7 +13,7 @@ git subtree does foo and bar!
 h,help   show the help
 q        quiet
 v        verbose
-onto=    existing subtree revision to connect, if any
+onto=    existing subtree revision to search for parent
 rejoin   merge the new branch back into HEAD
 "
 eval $(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)
@@ -172,6 +172,16 @@ cmd_split()
        debug "Splitting $dir..."
        cache_setup || exit $?
        
+       if [ -n "$onto" ]; then
+               echo "Reading history for $onto..."
+               git rev-list $onto |
+               while read rev; do
+                       # the 'onto' history is already just the subdir, so
+                       # any parent we find there can be used verbatim
+                       cache_set $rev $rev
+               done
+       fi
+       
        unrevs="$(find_existing_splits "$dir" "$revs")"
        
        git rev-list --reverse --parents $revs $unrevs -- "$dir" |