[Python] Is there a tool to create repo manifest file with SHA based on current work directory?

I'm using repo, which is used by Android project, to manage my project.

Is there a tool to create repo manifest file with SHA based on current work directory as the following?

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
<remote fetch="git://address.com/" name="origin" review="review.address.com"/>
<default remote="origin" revision="ics-something" sync-j="4"/>
<manifest-server url="http://manifests.address.com:8000"/>
<!-- sniff -->
<project name="platform/frameworks/base" path="frameworks/base"
revision="ecb41a77411358d385e3fde5b4e98a5f3d9cfdd5"/>
<project name="platform/packages/apps/Bluetooth" path="packages/apps/Bluetooth"
revision="621bae79f1a250e443eb83d1f473c533bea493dc"/>
<!-- sniff -->
</manifest>


I mean to create a new manifest file base the current manifest, and the project revision value is the HEAD SHA of projects in current work directory.

Thank you in advance.

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