Add support for replacing any partition image #103
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This commit adds support for replacing any partition image within the payload with a custom image. This is useful, for example, to add a custom kernel to an OTA, which may involve partitions that wouldn't normally be touched (eg. `vendor_dlkm`). Any image specified via `--replace` will have its corresponding descriptor in the vbmeta image updated. This is handled recursively. For example, replacing `vendor_dlkm` would update both `vbmeta_vendor` and `vbmeta`. This requires all vbmeta images to be extracted during the patching process so that a complete dependency graph can be computed. The performance hit in doing so is negligible, but does require the checksums of the stripped images to be updated for the tests. Fixes: #102 Signed-off-by: Andrew Gunnerson <[email protected]>
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This commit adds support for replacing any partition image within the payload with a custom image. This is useful, for example, to add a custom kernel to an OTA, which may involve partitions that wouldn't normally be touched (eg.
vendor_dlkm).Any image specified via
--replacewill have its corresponding descriptor in the vbmeta image updated. This is handled recursively. For example, replacingvendor_dlkmwould update bothvbmeta_vendorandvbmeta. This requires all vbmeta images to be extracted during the patching process so that a complete dependency graph can be computed. The performance hit in doing so is negligible, but does require the checksums of the stripped images to be updated for the tests.Fixes: #102