diff --git a/meta/lib/oe/patch.py b/meta/lib/oe/patch.py
new file mode 100644
index 0000000..108bf1d
--- /dev/null
+++ b/meta/lib/oe/patch.py
@@ -0,0 +1,659 @@
+import oe.path
+
+class NotFoundError(bb.BBHandledException):
+    def __init__(self, path):
+        self.path = path
+
+    def __str__(self):
+        return "Error: %s not found." % self.path
+
+class CmdError(bb.BBHandledException):
+    def __init__(self, exitstatus, output):
+        self.status = exitstatus
+        self.output = output
+
+    def __str__(self):
+        return "Command Error: exit status: %d  Output:\n%s" % (self.status, self.output)
+
+
+def runcmd(args, dir = None):
+    import pipes
+
+    if dir:
+        olddir = os.path.abspath(os.curdir)
+        if not os.path.exists(dir):
+            raise NotFoundError(dir)
+        os.chdir(dir)
+        # print("cwd: %s -> %s" % (olddir, dir))
+
+    try:
+        args = [ pipes.quote(str(arg)) for arg in args ]
+        cmd = " ".join(args)
+        # print("cmd: %s" % cmd)
+        (exitstatus, output) = oe.utils.getstatusoutput(cmd)
+        if exitstatus != 0:
+            raise CmdError(exitstatus >> 8, output)
+        return output
+
+    finally:
+        if dir:
+            os.chdir(olddir)
+
+class PatchError(Exception):
+    def __init__(self, msg):
+        self.msg = msg
+
+    def __str__(self):
+        return "Patch Error: %s" % self.msg
+
+class PatchSet(object):
+    defaults = {
+        "strippath": 1
+    }
+
+    def __init__(self, dir, d):
+        self.dir = dir
+        self.d = d
+        self.patches = []
+        self._current = None
+
+    def current(self):
+        return self._current
+
+    def Clean(self):
+        """
+        Clean out the patch set.  Generally includes unapplying all
+        patches and wiping out all associated metadata.
+        """
+        raise NotImplementedError()
+
+    def Import(self, patch, force):
+        if not patch.get("file"):
+            if not patch.get("remote"):
+                raise PatchError("Patch file must be specified in patch import.")
+            else:
+                patch["file"] = bb.fetch2.localpath(patch["remote"], self.d)
+
+        for param in PatchSet.defaults:
+            if not patch.get(param):
+                patch[param] = PatchSet.defaults[param]
+
+        if patch.get("remote"):
+            patch["file"] = bb.data.expand(bb.fetch2.localpath(patch["remote"], self.d), self.d)
+
+        patch["filemd5"] = bb.utils.md5_file(patch["file"])
+
+    def Push(self, force):
+        raise NotImplementedError()
+
+    def Pop(self, force):
+        raise NotImplementedError()
+
+    def Refresh(self, remote = None, all = None):
+        raise NotImplementedError()
+
+    @staticmethod
+    def getPatchedFiles(patchfile, striplevel, srcdir=None):
+        """
+        Read a patch file and determine which files it will modify.
+        Params:
+            patchfile: the patch file to read
+            striplevel: the strip level at which the patch is going to be applied
+            srcdir: optional path to join onto the patched file paths
+        Returns:
+            A list of tuples of file path and change mode ('A' for add,
+            'D' for delete or 'M' for modify)
+        """
+
+        def patchedpath(patchline):
+            filepth = patchline.split()[1]
+            if filepth.endswith('/dev/null'):
+                return '/dev/null'
+            filesplit = filepth.split(os.sep)
+            if striplevel > len(filesplit):
+                bb.error('Patch %s has invalid strip level %d' % (patchfile, striplevel))
+                return None
+            return os.sep.join(filesplit[striplevel:])
+
+        copiedmode = False
+        filelist = []
+        with open(patchfile) as f:
+            for line in f:
+                if line.startswith('--- '):
+                    patchpth = patchedpath(line)
+                    if not patchpth:
+                        break
+                    if copiedmode:
+                        addedfile = patchpth
+                    else:
+                        removedfile = patchpth
+                elif line.startswith('+++ '):
+                    addedfile = patchedpath(line)
+                    if not addedfile:
+                        break
+                elif line.startswith('*** '):
+                    copiedmode = True
+                    removedfile = patchedpath(line)
+                    if not removedfile:
+                        break
+                else:
+                    removedfile = None
+                    addedfile = None
+
+                if addedfile and removedfile:
+                    if removedfile == '/dev/null':
+                        mode = 'A'
+                    elif addedfile == '/dev/null':
+                        mode = 'D'
+                    else:
+                        mode = 'M'
+                    if srcdir:
+                        fullpath = os.path.abspath(os.path.join(srcdir, addedfile))
+                    else:
+                        fullpath = addedfile
+                    filelist.append((fullpath, mode))
+
+        return filelist
+
+
+class PatchTree(PatchSet):
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+        self.patchdir = os.path.join(self.dir, 'patches')
+        self.seriespath = os.path.join(self.dir, 'patches', 'series')
+        bb.utils.mkdirhier(self.patchdir)
+
+    def _appendPatchFile(self, patch, strippath):
+        with open(self.seriespath, 'a') as f:
+            f.write(os.path.basename(patch) + "," + strippath + "\n")
+        shellcmd = ["cat", patch, ">" , self.patchdir + "/" + os.path.basename(patch)]
+        runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+    def _removePatch(self, p):
+        patch = {}
+        patch['file'] = p.split(",")[0]
+        patch['strippath'] = p.split(",")[1]
+        self._applypatch(patch, False, True)
+
+    def _removePatchFile(self, all = False):
+        if not os.path.exists(self.seriespath):
+            return
+        with open(self.seriespath, 'r+') as f:
+            patches = f.readlines()
+        if all:
+            for p in reversed(patches):
+                self._removePatch(os.path.join(self.patchdir, p.strip()))
+            patches = []
+        else:
+            self._removePatch(os.path.join(self.patchdir, patches[-1].strip()))
+            patches.pop()
+        with open(self.seriespath, 'w') as f:
+            for p in patches:
+                f.write(p)
+         
+    def Import(self, patch, force = None):
+        """"""
+        PatchSet.Import(self, patch, force)
+
+        if self._current is not None:
+            i = self._current + 1
+        else:
+            i = 0
+        self.patches.insert(i, patch)
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        shellcmd = ["cat", patch['file'], "|", "patch", "-p", patch['strippath']]
+        if reverse:
+            shellcmd.append('-R')
+
+        if not run:
+            return "sh" + "-c" + " ".join(shellcmd)
+
+        if not force:
+            shellcmd.append('--dry-run')
+
+        output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+        if force:
+            return
+
+        shellcmd.pop(len(shellcmd) - 1)
+        output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+        if not reverse:
+            self._appendPatchFile(patch['file'], patch['strippath'])
+
+        return output
+
+    def Push(self, force = False, all = False, run = True):
+        bb.note("self._current is %s" % self._current)
+        bb.note("patches is %s" % self.patches)
+        if all:
+            for i in self.patches:
+                bb.note("applying patch %s" % i)
+                self._applypatch(i, force)
+                self._current = i
+        else:
+            if self._current is not None:
+                next = self._current + 1
+            else:
+                next = 0
+
+            bb.note("applying patch %s" % self.patches[next])
+            ret = self._applypatch(self.patches[next], force)
+
+            self._current = next
+            return ret
+
+    def Pop(self, force = None, all = None):
+        if all:
+            self._removePatchFile(True)
+            self._current = None
+        else:
+            self._removePatchFile(False)
+
+        if self._current == 0:
+            self._current = None
+
+        if self._current is not None:
+            self._current = self._current - 1
+
+    def Clean(self):
+        """"""
+        self.Pop(all=True)
+
+class GitApplyTree(PatchTree):
+    patch_line_prefix = '%% original patch'
+
+    def __init__(self, dir, d):
+        PatchTree.__init__(self, dir, d)
+
+    @staticmethod
+    def extractPatchHeader(patchfile):
+        """
+        Extract just the header lines from the top of a patch file
+        """
+        lines = []
+        with open(patchfile, 'r') as f:
+            for line in f.readlines():
+                if line.startswith('Index: ') or line.startswith('diff -') or line.startswith('---'):
+                    break
+                lines.append(line)
+        return lines
+
+    @staticmethod
+    def prepareCommit(patchfile):
+        """
+        Prepare a git commit command line based on the header from a patch file
+        (typically this is useful for patches that cannot be applied with "git am" due to formatting)
+        """
+        import tempfile
+        import re
+        author_re = re.compile('[\S ]+ <\S+@\S+\.\S+>')
+        # Process patch header and extract useful information
+        lines = GitApplyTree.extractPatchHeader(patchfile)
+        outlines = []
+        author = None
+        date = None
+        for line in lines:
+            if line.startswith('Subject: '):
+                subject = line.split(':', 1)[1]
+                # Remove any [PATCH][oe-core] etc.
+                subject = re.sub(r'\[.+?\]\s*', '', subject)
+                outlines.insert(0, '%s\n\n' % subject.strip())
+                continue
+            if line.startswith('From: ') or line.startswith('Author: '):
+                authorval = line.split(':', 1)[1].strip().replace('"', '')
+                # git is fussy about author formatting i.e. it must be Name <email@domain>
+                if author_re.match(authorval):
+                    author = authorval
+                    continue
+            if line.startswith('Date: '):
+                if date is None:
+                    dateval = line.split(':', 1)[1].strip()
+                    # Very crude check for date format, since git will blow up if it's not in the right
+                    # format. Without e.g. a python-dateutils dependency we can't do a whole lot more
+                    if len(dateval) > 12:
+                        date = dateval
+                continue
+            if line.startswith('Signed-off-by: '):
+                authorval = line.split(':', 1)[1].strip().replace('"', '')
+                # git is fussy about author formatting i.e. it must be Name <email@domain>
+                if author_re.match(authorval):
+                    author = authorval
+            outlines.append(line)
+        # Write out commit message to a file
+        with tempfile.NamedTemporaryFile('w', delete=False) as tf:
+            tmpfile = tf.name
+            for line in outlines:
+                tf.write(line)
+        # Prepare git command
+        cmd = ["git", "commit", "-F", tmpfile]
+        # git doesn't like plain email addresses as authors
+        if author and '<' in author:
+            cmd.append('--author="%s"' % author)
+        if date:
+            cmd.append('--date="%s"' % date)
+        return (tmpfile, cmd)
+
+    @staticmethod
+    def extractPatches(tree, startcommit, outdir):
+        import tempfile
+        import shutil
+        tempdir = tempfile.mkdtemp(prefix='oepatch')
+        try:
+            shellcmd = ["git", "format-patch", startcommit, "-o", tempdir]
+            out = runcmd(["sh", "-c", " ".join(shellcmd)], tree)
+            if out:
+                for srcfile in out.split():
+                    patchlines = []
+                    outfile = None
+                    with open(srcfile, 'r') as f:
+                        for line in f:
+                            if line.startswith(GitApplyTree.patch_line_prefix):
+                                outfile = line.split()[-1].strip()
+                                continue
+                            patchlines.append(line)
+                    if not outfile:
+                        outfile = os.path.basename(srcfile)
+                    with open(os.path.join(outdir, outfile), 'w') as of:
+                        for line in patchlines:
+                            of.write(line)
+        finally:
+            shutil.rmtree(tempdir)
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        import shutil
+
+        def _applypatchhelper(shellcmd, patch, force = False, reverse = False, run = True):
+            if reverse:
+                shellcmd.append('-R')
+
+            shellcmd.append(patch['file'])
+
+            if not run:
+                return "sh" + "-c" + " ".join(shellcmd)
+
+            return runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+        # Add hooks which add a pointer to the original patch file name in the commit message
+        reporoot = (runcmd("git rev-parse --show-toplevel".split(), self.dir) or '').strip()
+        if not reporoot:
+            raise Exception("Cannot get repository root for directory %s" % self.dir)
+        commithook = os.path.join(reporoot, '.git', 'hooks', 'commit-msg')
+        commithook_backup = commithook + '.devtool-orig'
+        applyhook = os.path.join(reporoot, '.git', 'hooks', 'applypatch-msg')
+        applyhook_backup = applyhook + '.devtool-orig'
+        if os.path.exists(commithook):
+            shutil.move(commithook, commithook_backup)
+        if os.path.exists(applyhook):
+            shutil.move(applyhook, applyhook_backup)
+        with open(commithook, 'w') as f:
+            # NOTE: the formatting here is significant; if you change it you'll also need to
+            # change other places which read it back
+            f.write('echo >> $1\n')
+            f.write('echo "%s: $PATCHFILE" >> $1\n' % GitApplyTree.patch_line_prefix)
+        os.chmod(commithook, 0755)
+        shutil.copy2(commithook, applyhook)
+        try:
+            patchfilevar = 'PATCHFILE="%s"' % os.path.basename(patch['file'])
+            try:
+                shellcmd = [patchfilevar, "git", "--work-tree=%s" % reporoot, "am", "-3", "--keep-cr", "-p%s" % patch['strippath']]
+                return _applypatchhelper(shellcmd, patch, force, reverse, run)
+            except CmdError:
+                # Need to abort the git am, or we'll still be within it at the end
+                try:
+                    shellcmd = ["git", "--work-tree=%s" % reporoot, "am", "--abort"]
+                    runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                except CmdError:
+                    pass
+                # Fall back to git apply
+                shellcmd = ["git", "--git-dir=%s" % reporoot, "apply", "-p%s" % patch['strippath']]
+                try:
+                    output = _applypatchhelper(shellcmd, patch, force, reverse, run)
+                except CmdError:
+                    # Fall back to patch
+                    output = PatchTree._applypatch(self, patch, force, reverse, run)
+                # Add all files
+                shellcmd = ["git", "add", "-f", "-A", "."]
+                output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                # Exclude the patches directory
+                shellcmd = ["git", "reset", "HEAD", self.patchdir]
+                output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                # Commit the result
+                (tmpfile, shellcmd) = self.prepareCommit(patch['file'])
+                try:
+                    shellcmd.insert(0, patchfilevar)
+                    output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+                finally:
+                    os.remove(tmpfile)
+                return output
+        finally:
+            os.remove(commithook)
+            os.remove(applyhook)
+            if os.path.exists(commithook_backup):
+                shutil.move(commithook_backup, commithook)
+            if os.path.exists(applyhook_backup):
+                shutil.move(applyhook_backup, applyhook)
+
+
+class QuiltTree(PatchSet):
+    def _runcmd(self, args, run = True):
+        quiltrc = self.d.getVar('QUILTRCFILE', True)
+        if not run:
+            return ["quilt"] + ["--quiltrc"] + [quiltrc] + args
+        runcmd(["quilt"] + ["--quiltrc"] + [quiltrc] + args, self.dir)
+
+    def _quiltpatchpath(self, file):
+        return os.path.join(self.dir, "patches", os.path.basename(file))
+
+
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+        self.initialized = False
+        p = os.path.join(self.dir, 'patches')
+        if not os.path.exists(p):
+            os.makedirs(p)
+
+    def Clean(self):
+        try:
+            self._runcmd(["pop", "-a", "-f"])
+            oe.path.remove(os.path.join(self.dir, "patches","series"))
+        except Exception:
+            pass
+        self.initialized = True
+
+    def InitFromDir(self):
+        # read series -> self.patches
+        seriespath = os.path.join(self.dir, 'patches', 'series')
+        if not os.path.exists(self.dir):
+            raise NotFoundError(self.dir)
+        if os.path.exists(seriespath):
+            with open(seriespath, 'r') as f:
+                for line in f.readlines():
+                    patch = {}
+                    parts = line.strip().split()
+                    patch["quiltfile"] = self._quiltpatchpath(parts[0])
+                    patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+                    if len(parts) > 1:
+                        patch["strippath"] = parts[1][2:]
+                    self.patches.append(patch)
+
+            # determine which patches are applied -> self._current
+            try:
+                output = runcmd(["quilt", "applied"], self.dir)
+            except CmdError:
+                import sys
+                if sys.exc_value.output.strip() == "No patches applied":
+                    return
+                else:
+                    raise
+            output = [val for val in output.split('\n') if not val.startswith('#')]
+            for patch in self.patches:
+                if os.path.basename(patch["quiltfile"]) == output[-1]:
+                    self._current = self.patches.index(patch)
+        self.initialized = True
+
+    def Import(self, patch, force = None):
+        if not self.initialized:
+            self.InitFromDir()
+        PatchSet.Import(self, patch, force)
+        oe.path.symlink(patch["file"], self._quiltpatchpath(patch["file"]), force=True)
+        with open(os.path.join(self.dir, "patches", "series"), "a") as f:
+            f.write(os.path.basename(patch["file"]) + " -p" + patch["strippath"] + "\n")
+        patch["quiltfile"] = self._quiltpatchpath(patch["file"])
+        patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+
+        # TODO: determine if the file being imported:
+        #      1) is already imported, and is the same
+        #      2) is already imported, but differs
+
+        self.patches.insert(self._current or 0, patch)
+
+
+    def Push(self, force = False, all = False, run = True):
+        # quilt push [-f]
+
+        args = ["push"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+        if not run:
+            return self._runcmd(args, run)
+
+        self._runcmd(args)
+
+        if self._current is not None:
+            self._current = self._current + 1
+        else:
+            self._current = 0
+
+    def Pop(self, force = None, all = None):
+        # quilt pop [-f]
+        args = ["pop"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+
+        self._runcmd(args)
+
+        if self._current == 0:
+            self._current = None
+
+        if self._current is not None:
+            self._current = self._current - 1
+
+    def Refresh(self, **kwargs):
+        if kwargs.get("remote"):
+            patch = self.patches[kwargs["patch"]]
+            if not patch:
+                raise PatchError("No patch found at index %s in patchset." % kwargs["patch"])
+            (type, host, path, user, pswd, parm) = bb.fetch.decodeurl(patch["remote"])
+            if type == "file":
+                import shutil
+                if not patch.get("file") and patch.get("remote"):
+                    patch["file"] = bb.fetch2.localpath(patch["remote"], self.d)
+
+                shutil.copyfile(patch["quiltfile"], patch["file"])
+            else:
+                raise PatchError("Unable to do a remote refresh of %s, unsupported remote url scheme %s." % (os.path.basename(patch["quiltfile"]), type))
+        else:
+            # quilt refresh
+            args = ["refresh"]
+            if kwargs.get("quiltfile"):
+                args.append(os.path.basename(kwargs["quiltfile"]))
+            elif kwargs.get("patch"):
+                args.append(os.path.basename(self.patches[kwargs["patch"]]["quiltfile"]))
+            self._runcmd(args)
+
+class Resolver(object):
+    def __init__(self, patchset, terminal):
+        raise NotImplementedError()
+
+    def Resolve(self):
+        raise NotImplementedError()
+
+    def Revert(self):
+        raise NotImplementedError()
+
+    def Finalize(self):
+        raise NotImplementedError()
+
+class NOOPResolver(Resolver):
+    def __init__(self, patchset, terminal):
+        self.patchset = patchset
+        self.terminal = terminal
+
+    def Resolve(self):
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push()
+        except Exception:
+            import sys
+            os.chdir(olddir)
+            raise
+
+# Patch resolver which relies on the user doing all the work involved in the
+# resolution, with the exception of refreshing the remote copy of the patch
+# files (the urls).
+class UserResolver(Resolver):
+    def __init__(self, patchset, terminal):
+        self.patchset = patchset
+        self.terminal = terminal
+
+    # Force a push in the patchset, then drop to a shell for the user to
+    # resolve any rejected hunks
+    def Resolve(self):
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push(False)
+        except CmdError as v:
+            # Patch application failed
+            patchcmd = self.patchset.Push(True, False, False)
+
+            t = self.patchset.d.getVar('T', True)
+            if not t:
+                bb.msg.fatal("Build", "T not set")
+            bb.utils.mkdirhier(t)
+            import random
+            rcfile = "%s/bashrc.%s.%s" % (t, str(os.getpid()), random.random())
+            with open(rcfile, "w") as f:
+                f.write("echo '*** Manual patch resolution mode ***'\n")
+                f.write("echo 'Dropping to a shell, so patch rejects can be fixed manually.'\n")
+                f.write("echo 'Run \"quilt refresh\" when patch is corrected, press CTRL+D to exit.'\n")
+                f.write("echo ''\n")
+                f.write(" ".join(patchcmd) + "\n")
+            os.chmod(rcfile, 0775)
+
+            self.terminal("bash --rcfile " + rcfile, 'Patch Rejects: Please fix patch rejects manually', self.patchset.d)
+
+            # Construct a new PatchSet after the user's changes, compare the
+            # sets, checking patches for modifications, and doing a remote
+            # refresh on each.
+            oldpatchset = self.patchset
+            self.patchset = oldpatchset.__class__(self.patchset.dir, self.patchset.d)
+
+            for patch in self.patchset.patches:
+                oldpatch = None
+                for opatch in oldpatchset.patches:
+                    if opatch["quiltfile"] == patch["quiltfile"]:
+                        oldpatch = opatch
+
+                if oldpatch:
+                    patch["remote"] = oldpatch["remote"]
+                    if patch["quiltfile"] == oldpatch["quiltfile"]:
+                        if patch["quiltfilemd5"] != oldpatch["quiltfilemd5"]:
+                            bb.note("Patch %s has changed, updating remote url %s" % (os.path.basename(patch["quiltfile"]), patch["remote"]))
+                            # user change?  remote refresh
+                            self.patchset.Refresh(remote=True, patch=self.patchset.patches.index(patch))
+                        else:
+                            # User did not fix the problem.  Abort.
+                            raise PatchError("Patch application failed, and user did not fix and refresh the patch.")
+        except Exception:
+            os.chdir(olddir)
+            raise
+        os.chdir(olddir)