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�ZdS(s)Handles all VCS (version control) supporti(tabsolute_importN(tparse(t
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        Return the name of the version control backend if found at given
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        Export the repository at the url to the destination location
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        Returns the correct repository URL and revision by parsing the given
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        Prepare a location to receive a checkout/clone.

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        Clean up current location and download the url repository
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        Return a string representing the requirement needed to
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        Return the url used at location
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        Return the current revision of the files at location
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        Run a VCS subcommand
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        Check if a location is controlled by the vcs.
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