Submodules should include the trac commit of sub-submodules if any.

If you had a submodule with sub-submodules, we'd recurse all the way
into the latter and generate all the necessary trac commits, but then
we'd forget to include that trac commit as a parent of the first
submodule's trac commit. Oops.

Fixes #2.

Author: apenwarr

subtrac.go

@@ -220,6 +220,12 @@ func (c *Cache) tracCommit(path string, commit *object.Commit) (*Trac, error) {
 		if !seenHeads[h.hash] {
 			seenHeads[h.hash] = true
 			newHeads = append(newHeads, h)
+			if h.tracCommit != nil {
+				if !seenTracs[h.tracCommit.Hash] {
+					seenTracs[h.tracCommit.Hash] = true
+					tracs = append(tracs, h.tracCommit)
+				}
+			}
 		}
 	}