diff --git a/functions-common b/functions-common
index d92e39c..d6f71b4 100644
--- a/functions-common
+++ b/functions-common
@@ -1130,6 +1130,58 @@
         && $SUDO_PIP rm -rf ${pip_build_tmp}
 }
 
+# ``pip install -e`` the package, which processes the dependencies
+# using pip before running `setup.py develop`
+#
+# Updates the dependencies in project_dir from the
+# openstack/requirements global list before installing anything.
+#
+# Uses globals ``TRACK_DEPENDS``, ``REQUIREMENTS_DIR``, ``UNDO_REQUIREMENTS``
+# setup_develop directory
+function setup_develop() {
+    local project_dir=$1
+
+    echo "cd $REQUIREMENTS_DIR; $SUDO_CMD python update.py $project_dir"
+
+    # Don't update repo if local changes exist
+    # Don't use buggy "git diff --quiet"
+    (cd $project_dir && git diff --exit-code >/dev/null)
+    local update_requirements=$?
+
+    if [ $update_requirements -eq 0 ]; then
+        (cd $REQUIREMENTS_DIR; \
+            $SUDO_CMD python update.py $project_dir)
+    fi
+
+    setup_develop_no_requirements_update $project_dir
+
+    # We've just gone and possibly modified the user's source tree in an
+    # automated way, which is considered bad form if it's a development
+    # tree because we've screwed up their next git checkin. So undo it.
+    #
+    # However... there are some circumstances, like running in the gate
+    # where we really really want the overridden version to stick. So provide
+    # a variable that tells us whether or not we should UNDO the requirements
+    # changes (this will be set to False in the OpenStack ci gate)
+    if [ $UNDO_REQUIREMENTS = "True" ]; then
+        if [ $update_requirements -eq 0 ]; then
+            (cd $project_dir && git reset --hard)
+        fi
+    fi
+}
+
+# ``pip install -e`` the package, which processes the dependencies
+# using pip before running `setup.py develop`
+# Uses globals ``STACK_USER``
+# setup_develop_no_requirements_update directory
+function setup_develop_no_requirements_update() {
+    local project_dir=$1
+
+    pip_install -e $project_dir
+    # ensure that further actions can do things like setup.py sdist
+    safe_chown -R $STACK_USER $1/*.egg-info
+}
+
 
 # Service Functions
 # =================