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build: reject Ubuntu initramfs source edits made during packing - #584
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The focused guard addresses the provenance mismatch with regression coverage for both outcomes and no identified blocking issues.
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What changed in this PR
Fixes #506 by preventing native Ubuntu initramfs builds from recording provenance that does not match their source inputs.
Changes:
- Captures the customization digest before root preparation and checks it again after packing.
- Removes the artifact and manifest and fails if inputs changed.
- Adds regression coverage for changed and unchanged sources.
| File | Description |
|---|---|
| scripts/test_nvx_tools.py | Tests source-mutation rejection, cleanup, and unchanged-source success. |
| scripts/nvx_tools/build.py | Adds the Ubuntu input digest snapshot and post-pack validation. |
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The Ubuntu manifest recorded the customization digest computed after the archive was packed, so an edit to a customization source during the build produced an artifact whose helpers came from the old source while the manifest advertised the new digest. The release guest-input gate accepted it. Snapshot the digest before the root is prepared and compare it again after packing. On a mismatch, remove the artifact and its manifest and fail, as the Alpine and kernel builds already do. Fixes microsoft#506 Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com> Signed-off-by: jay23606 <4602056+jay23606@users.noreply.github.com>
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Fixes #506.
Summary
initramfs source inputs changed during the build, matching the Alpine and kernel paths.Test
test_ubuntu_initramfs_rejects_source_mutation_during_pack: the mutation case fails before this change (noScriptError) and passes after; the unchanged-source control passes before and after.test_nvx_tools.py: 485 pass, 54 skipped, 0 failures. ruff check and ruff format are clean.🤖 Generated with Claude Code