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fix(downloader): extract only the shim binary from the archive #604

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fix(downloader): extract only the shim binary from the archive #604

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6 changes: 4 additions & 2 deletions images/downloader/download_shim.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -33,13 +33,15 @@ log "$(tar --version)" "INFO"
log "md5sum: $(md5sum containerd-shim-${SHIM_NAME})" "INFO"
log "sha256sum: $(sha256sum containerd-shim-${SHIM_NAME})" "INFO"

tar -xzf "containerd-shim-${SHIM_NAME}" -C /assets
tar -xzf "containerd-shim-${SHIM_NAME}" -C /tmp
# there may be multiple files in the archive; only copy the shim binary to /assets
cp /tmp/containerd-shim-${SHIM_NAME} /assets
log "download successful:" "INFO"

# Verify SHA-256 if provided
if [ -n "${SHIM_SHA256:-}" ]; then
log "verifying SHA-256 digest..." "INFO"
if echo "${SHIM_SHA256} containerd-shim-${SHIM_NAME}" | sha256sum -c -; then
if echo "${SHIM_SHA256} containerd-shim-${SHIM_NAME}" | sha256sum -c -; then
log "SHA-256 verification passed" "INFO"
else
log "SHA-256 verification FAILED: expected ${SHIM_SHA256} for containerd-shim-${SHIM_NAME}" "ERROR"
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