... and some git scripts...

bin/git-on-tree

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+start_rev=$1
+end_rev=$2
+cmd=$3
+
+
+function main()
+{
+  revs=`git rev-list --reverse ${start_rev}..${end_rev}`
+  for rev in $revs; do
+    git checkout --quiet $rev
+    eval $cmd
+    git reset --hard --quiet
+  done
+  git checkout ${end_rev}
+}
+
+main "$@"