[lczyk]

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did some formal verification (fizzbee, my specs are here and here) of the cut path and found 7 minor bugs:

• fix: prefer ignores x-arch paths #330 (this PR)
• fix: validation miss for mutable: true, until: mutate #331
• fix: implicit parents hiding explicit paths #332
• fix: manifest attribution of until: mutate #333
• fix: hard links against content from another package #334
• fix: hard links whose target is not in the manifest #335
• fix: listed mode of copied paths #336

# slices/test-package1.yaml
package: test-package1
slices:
  myslice:
    contents:
      /file: {arch: amd64}

# slices/test-package2.yaml
package: test-package2
slices:
  myslice:
    contents:
      /file: {prefer: test-package1}

for some non-amd64 arch:

$ chisel cut --release ./ --arch arm64 --root $rootfs test-package1_myslice test-package2_myslice
$ test -f $rootfs/file || echo missing
missing

no error from cut. /file silently missing.

repro using chisel-proxy:

$ alias chisel-proxy='go run github.com/lczyk/chisel-proxy/cmd/chisel-proxy@v0.3.0'
$ mkdir -p test-package1 test-package2
$ echo foo > test-package1/file
$ echo bar > test-package2/file
$ chisel-proxy cut --arch arm64 ./test-package1 ./test-package2 ./test-package1.yaml ./test-package2.yaml \
    -- --root ./rootfs test-package1_myslice test-package2_myslice
Extracting files from package "test-package1"...
Extracting files from package "test-package2"...
$ test -f ./rootfs/file || echo missing
missing

fix

Selection now records the arch it was made for (Select already takes it) and Prefers skips listings that do not apply to it.

[lczyk]

mmm... 🤔 lemme check that this kind of bug does not accidentally extend to release validation too...

edit: no

[Copilot]

🟢 Approval recommended

No unresolved blocking issues were identified.

0 open findings

What changed in this PR

Fixes architecture-aware prefer resolution so paths restricted to other architectures do not suppress valid providers.

Changes:

• Records the selected architecture.
• Filters architecture-inapplicable preferred paths.
• Adds setup and slicer regression tests.

File	Description
internal/​setup/​setup.go	Tracks architecture and filters preferences.
internal/​setup/​setup_test.go	Tests architecture-specific preference selection.
internal/​slicer/​slicer_test.go	Adds end-to-end regression coverage.

🧠 Review effort: Lite

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