diff --git a/meta/meta-openembedded/meta-oe/classes/gitver.bbclass b/meta/meta-openembedded/meta-oe/classes/gitver.bbclass
new file mode 100644
index 0000000..07f44c3
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+++ b/meta/meta-openembedded/meta-oe/classes/gitver.bbclass
@@ -0,0 +1,84 @@
+# Copyright (C) 2009 Chris Larson <clarson@kergoth.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+#
+# gitver.bbclass provides a GITVER variable which is a (fairly) sane version,
+# for use in ${PV}, extracted from the ${S} git checkout, assuming it is one.
+# This is most useful in concert with srctree.bbclass.
+
+def git_drop_tag_prefix(version):
+    import re
+    if re.match("v\d", version):
+        return version[1:]
+    else:
+        return version
+
+GIT_TAGADJUST = "git_drop_tag_prefix(version)"
+GITVER = "${@get_git_pv(d, tagadjust=lambda version:${GIT_TAGADJUST})}"
+GITSHA = "${@get_git_hash(d)}"
+
+def gitrev_run(cmd, path):
+    (output, error) = bb.process.run(cmd, cwd=path)
+    return output.rstrip()
+
+def get_git_pv(d, tagadjust=None):
+    import os
+
+    srcdir = d.getVar("EXTERNALSRC") or d.getVar("S")
+    gitdir = os.path.abspath(os.path.join(srcdir, ".git"))
+    try:
+        ver = gitrev_run("git describe --tags", gitdir)
+    except:
+        try:
+            ver = gitrev_run("git rev-parse --short HEAD", gitdir)
+            if ver:
+                return "0.0+%s" % ver
+            else:
+                return "0.0"
+
+        except Exception as exc:
+            raise bb.parse.SkipRecipe(str(exc))
+
+    if ver and tagadjust:
+        ver = tagadjust(ver)
+    return ver
+
+def get_git_hash(d):
+    import os
+
+    srcdir = d.getVar("EXTERNALSRC") or d.getVar("S")
+    gitdir = os.path.abspath(os.path.join(srcdir, ".git"))
+    try:
+        rev = gitrev_run("git rev-list HEAD -1")
+        return rev[:7]
+    except Exception as exc:
+        bb.fatal(str(exc))
+
+def mark_recipe_dependencies(path, d):
+    from bb.parse import mark_dependency
+
+    gitdir = os.path.join(path, ".git")
+
+    # Force the recipe to be reparsed so the version gets bumped
+    # if the active branch is switched, or if the branch changes.
+    mark_dependency(d, os.path.join(gitdir, "HEAD"))
+
+    # Force a reparse if anything in the index changes.
+    mark_dependency(d, os.path.join(gitdir, "index"))
+
+    try:
+        ref = gitrev_run("git symbolic-ref -q HEAD", gitdir)
+    except bb.process.CmdError:
+        pass
+    else:
+        if ref:
+            mark_dependency(d, os.path.join(gitdir, ref))
+
+    # Catch new tags.
+    tagdir = os.path.join(gitdir, "refs", "tags")
+    if os.path.exists(tagdir):
+        mark_dependency(d, tagdir)
+
+python () {
+    srcdir = d.getVar("EXTERNALSRC") or d.getVar("S")
+    mark_recipe_dependencies(srcdir, d)
+}