Merge "Clarify OVERWRITE_OLD_IMAGE docs"

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Jenkins 2016-09-01 06:29:21 +00:00 committed by Gerrit Code Review
commit 2904956a60

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@ -19,7 +19,9 @@ to the end of the path if a path is supplied.
By default, the image building scripts will not overwrite existing
disk images, allowing you to compare the newly built image with the
existing one. To change that behaviour, set the variable
``OVERWRITE_OLD_IMAGE`` to any value that isn't ``0``.
``OVERWRITE_OLD_IMAGE`` to any value that isn't ``0``. If this value is
zero then any existing image will be moved before the new image is
written to the destination.
Setting the variable ``DIB_SHOW_IMAGE_USAGE`` will print out a
summarised disk-usage report for the final image of files and