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Ran 04 Jul 2025 09:28AM UTC

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Committed 04 Jul 2025 09:16AM UTC coverage: 77.719%. Remained the same

Job # 16070495313.1

Build Type

push

github

Committed by

web-flow

Commit Message

Add a `qcow2-to-stdout` Python script (#6559)

This script serves as one half of a `vhd-tool`-like solution for QCOW,
only offering the export side (converting a raw file to a qcow2 stream).
We can't use `qemu-img` or some other ready-made library because these
create a temporary file (seeking in both the source and the
destination), which we want to avoid.

The script is taken from upstream QEMU, with some modifications for our
use-case:
* we want the script to only operate on "raw" files
* it needs to work on block special files as opposed to regular files
* and it needs to export a "difference" between two files, just like
`vhd-tool` does

The script is currently unused.

The import half (`qcow2 stream->raw file`) was merged in
[`ocaml-qcow`](https://github.com/mirage/ocaml-qcow/pull/127) and will
later be integrated into xapi together with this script through a
`qcow_tool_wrapper`.

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