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artifact/kernel: deduplicate config hash inputs

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Reduce kernel_config_modifying_hashes to last assignment per key before
hashing, so that overridden config options do not cause unnecessary
cache invalidation. Uses tac|sort to implement last-value-wins
deduplication.

Co-Authored-By: tabrisnet <tabrisnet@users.noreply.github.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Igor Velkov 2026-01-28 04:10:08 +02:00 committed by tabrisnet
parent 1925fa7228
commit 2f834c2508
1 changed files with 7 additions and 1 deletions
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8
lib/functions/artifacts/artifact-kernel.sh
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@ -127,7 +127,13 @@ function artifact_kernel_prepare_version() {
declare kernel_config_modifying_hashes_hash="undetermined"
declare -a kernel_config_modifying_hashes=()
call_extensions_kernel_config
kernel_config_modification_hash="$(echo "${kernel_config_modifying_hashes[@]}" | sha256sum | cut -d' ' -f1)"
# Reduce to last assignment per key to keep hashing stable and ignore overridden options.
# tac reverses order so last becomes first, then sort -uk keeps first occurrence of each key.
declare -a kernel_config_modifying_hashes_reduced=()
mapfile -t kernel_config_modifying_hashes_reduced < <(
printf '%s\n' "${kernel_config_modifying_hashes[@]}" | tac | LC_ALL=C sort -t '=' -uk 1,1
)
kernel_config_modification_hash="$(printf '%s\n' "${kernel_config_modifying_hashes_reduced[@]}" | sha256sum | cut -d' ' -f1)"
kernel_config_modification_hash="${kernel_config_modification_hash:0:16}" # "long hash"
declare kernel_config_modification_hash_short="${kernel_config_modification_hash:0:${short_hash_size}}"