--- /dev/null
+def get_package_manager(d, root_path):
+    """
+    Returns an OE package manager that can install packages in root_path.
+    """
+    from oe.package_manager import RpmPM, OpkgPM, DpkgPM
+
+    pkg_class = d.getVar("IMAGE_PKGTYPE", True)
+    if pkg_class == "rpm":
+        pm = RpmPM(d,
+                   root_path,
+                   d.getVar('TARGET_VENDOR', True))
+        pm.create_configs()
+
+    elif pkg_class == "ipk":
+        pm = OpkgPM(d,
+                    root_path,
+                    d.getVar("IPKGCONF_TARGET", True),
+                    d.getVar("ALL_MULTILIB_PACKAGE_ARCHS", True))
+
+    elif pkg_class == "deb":
+        pm = DpkgPM(d,
+                    root_path,
+                    d.getVar('PACKAGE_ARCHS', True),
+                    d.getVar('DPKG_ARCH', True))
+
+    pm.write_index()
+    pm.update()
+
+    return pm