fix: remove local keyword from top-level script context

The setup-tools script runs chainsaw installation at the top level,
not inside a function, so local is invalid in bash strict mode.

Author: mchmarny

tools/setup-tools

@@ -365,21 +365,21 @@ if [[ "${SKIP_TOOLS}" == "false" ]]; then
     else
         log_info "Installing Chainsaw ${CHAINSAW_VERSION}..."
         if prompt_continue; then
-            local ver="${CHAINSAW_VERSION#v}"
-            local os_name; os_name="$(uname -s | tr '[:upper:]' '[:lower:]')"
-            local arch; arch="$(uname -m)"
-            case "${arch}" in
-                x86_64) arch="amd64" ;;
-                aarch64|arm64) arch="arm64" ;;
+            CHAINSAW_VER="${CHAINSAW_VERSION#v}"
+            CHAINSAW_OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
+            CHAINSAW_ARCH="$(uname -m)"
+            case "${CHAINSAW_ARCH}" in
+                x86_64) CHAINSAW_ARCH="amd64" ;;
+                aarch64|arm64) CHAINSAW_ARCH="arm64" ;;
             esac
-            local tar="chainsaw_${os_name}_${arch}.tar.gz"
-            local url="https://github.com/kyverno/chainsaw/releases/download/v${ver}/${tar}"
-            local tmp; tmp="$(mktemp -d)"
-            curl -fsSL -o "${tmp}/${tar}" "${url}"
-            tar -xzf "${tmp}/${tar}" -C "${tmp}"
-            sudo mv "${tmp}/chainsaw" /usr/local/bin/chainsaw
+            CHAINSAW_TAR="chainsaw_${CHAINSAW_OS}_${CHAINSAW_ARCH}.tar.gz"
+            CHAINSAW_URL="https://github.com/kyverno/chainsaw/releases/download/v${CHAINSAW_VER}/${CHAINSAW_TAR}"
+            CHAINSAW_TMP="$(mktemp -d)"
+            curl -fsSL -o "${CHAINSAW_TMP}/${CHAINSAW_TAR}" "${CHAINSAW_URL}"
+            tar -xzf "${CHAINSAW_TMP}/${CHAINSAW_TAR}" -C "${CHAINSAW_TMP}"
+            sudo mv "${CHAINSAW_TMP}/chainsaw" /usr/local/bin/chainsaw
             sudo chmod +x /usr/local/bin/chainsaw
-            rm -rf "${tmp}"
+            rm -rf "${CHAINSAW_TMP}"
             log_success "Chainsaw installed"
         fi
     fi