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MeshChatX/scripts/ci/setup-cosign.sh

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#!/bin/sh
# Install cosign from GitHub releases with SHA256 verification.
# Usage: setup-cosign.sh [version]
set -eu
COSIGN_VERSION="${1:-3.0.5}"
ARCH="$(uname -m)"
case "$ARCH" in
x86_64) ARCH="amd64" ;;
aarch64) ARCH="arm64" ;;
*) echo "Unsupported architecture: $ARCH" >&2; exit 1 ;;
esac
BASE_URL="https://github.com/sigstore/cosign/releases/download/v${COSIGN_VERSION}"
BINARY="cosign-linux-${ARCH}"
CHECKSUMS_URL="${BASE_URL}/cosign_checksums.txt"
curl -fsSL "$CHECKSUMS_URL" -o /tmp/cosign-checksums.txt
curl -fsSL "${BASE_URL}/${BINARY}" -o /tmp/cosign
EXPECTED="$(grep " ${BINARY}\$" /tmp/cosign-checksums.txt | awk '{print $1}')"
ACTUAL="$(sha256sum /tmp/cosign | awk '{print $1}')"
if [ -z "$EXPECTED" ] || [ "$EXPECTED" != "$ACTUAL" ]; then
echo "SHA256 verification failed for ${BINARY}" >&2
rm -f /tmp/cosign /tmp/cosign-checksums.txt
exit 1
fi
sudo install -m 0755 /tmp/cosign /usr/local/bin/cosign
rm -f /tmp/cosign /tmp/cosign-checksums.txt
cosign version