Always install the latest GitHub Actions Runner (#117)

scripts/install-actions-runner.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Set shell options to enable fail-fast behavior
+#
+# * -e: fail the script when an error occurs or command fails
+# * -u: fail the script when attempting to reference unset parameters
+# * -o pipefail: by default an exit status of a pipeline is that of its
+#                last command, this fails the pipe early if an error in
+#                any of its commands occurs
+#
+set -euo pipefail
+
+source ~/.zprofile
+brew install jq
+
+DOWNLOAD_URL=$(curl -sS 'https://api.github.com/repos/actions/runner/releases/latest' | jq --raw-output '.assets[] | select(.name | test("actions-runner-osx-arm64-[0-9.]+.tar.gz")) | .browser_download_url')
+
+rm -rf actions-runner && mkdir actions-runner && cd actions-runner
+
+wget -O - "${DOWNLOAD_URL}" | tar xz