ci-automation/vms: provide Hyper-V images with .zip compression

On Windows, the .bz2 compression format is not supported by native tooling and external tools like 7zip need to be installed. Switching to .zip compression, there will be no need for the extra step of having external tools. See: flatcar/Flatcar#1009 Signed-off-by: Adrian Vladu <[email protected]>
flatcar · Apr 11, 2024 · c5f6cdb · c5f6cdb
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diff --git a/changelog/changes/2024-04-11-hyperv-images-compression.md b/changelog/changes/2024-04-11-hyperv-images-compression.md
@@ -0,0 +1 @@
+- Hyper-V images, both .vhd and .vhdx files are available as `zip` compressed, switching from `bzip2` to a built-in available Windows compression - `zip` ([scripts#1878](https://github.com/flatcar/scripts/pull/1878))
diff --git a/ci-automation/vms.sh b/ci-automation/vms.sh
@@ -136,6 +136,8 @@ function _vm_build_impl() {
             COMPRESSION_FORMAT="gz,bz2,none"
         elif [[ "${format}" =~ ^(qemu|qemu_uefi)$ ]];then
             COMPRESSION_FORMAT="bz2,none"
+        elif [[ "${format}" =~ ^(hyperv|hyperv_vhdx)$ ]];then
+            COMPRESSION_FORMAT="zip"
         fi
         ./run_sdk_container -n "${vms_container}" -C "${packages_image}" \
             -v "${vernum}" \
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		@@ -0,0 +1 @@
		- Hyper-V images, both .vhd and .vhdx files are available as `zip` compressed, switching from `bzip2` to a built-in available Windows compression - `zip` ([scripts#1878](https://github.com/flatcar/scripts/pull/1878))