setup: derive target platform constants and kubescape asset name

Author: martin-mat

src/tasks/setup/constants.cr

@@ -1,6 +1,32 @@
 module Setup
-  DEFAULT_OS    = "linux"
-  DEFAULT_ARCH  = "amd64"
+  TARGET_OS = begin
+    {% if flag?(:darwin) %}
+      "darwin"
+    {% else %}
+      "linux"
+    {% end %}
+  end
+
+  TARGET_ARCH = begin
+    {% if flag?(:aarch64) %}
+      "arm64"
+    {% else %}
+      "amd64"
+    {% end %}
+  end
+
+  KUBESCAPE_TARGET_BINARY_NAME = begin
+    case {TARGET_OS, TARGET_ARCH}
+    when {"darwin", "arm64"}
+      "kubescape-arm64-macos-latest"
+    when {"darwin", "amd64"}
+      "kubescape-macos-latest"
+    when {"linux", "arm64"}
+      "kubescape-arm64-ubuntu-latest"
+    else
+      "kubescape-ubuntu-latest"
+    end
+  end
 
   # Versions of the tools
   CLUSTER_API_VERSION         = "1.9.6"
@@ -13,27 +39,27 @@ module Setup
 
   # Useful consts grouped by tools
   CLUSTER_API_URL    = "https://github.com/kubernetes-sigs/cluster-api/releases/download/" +
-                       "v#{CLUSTER_API_VERSION}/clusterctl-#{DEFAULT_OS}-#{DEFAULT_ARCH}"
+                       "v#{CLUSTER_API_VERSION}/clusterctl-#{TARGET_OS}-#{TARGET_ARCH}"
   CLUSTER_API_DIR    = "\#{tools_path}/cluster-api"
   CLUSTERCTL_BINARY  = "#{CLUSTER_API_DIR}/clusterctl"
 
-  KIND_DOWNLOAD_URL  = "https://github.com/kubernetes-sigs/kind/releases/download/v#{KIND_VERSION}/kind-#{DEFAULT_OS}-#{DEFAULT_ARCH}"
+  KIND_DOWNLOAD_URL  = "https://github.com/kubernetes-sigs/kind/releases/download/v#{KIND_VERSION}/kind-#{TARGET_OS}-#{TARGET_ARCH}"
   KIND_DIR           = "#{tools_path}/kind"
 
   KUBESCAPE_DIR      = "#{tools_path}/kubescape"
   KUBESCAPE_URL      = "https://github.com/kubescape/kubescape/releases/download/" +
-                       "v#{KUBESCAPE_VERSION}/kubescape-ubuntu-latest"
+                       "v#{KUBESCAPE_VERSION}/#{KUBESCAPE_TARGET_BINARY_NAME}"
   KUBESCAPE_FRAMEWORK_URL = "https://github.com/kubescape/regolibrary/releases/download/" +
                              "v#{KUBESCAPE_FRAMEWORK_VERSION}/nsa"
 
   GATEKEEPER_REPO    = "https://open-policy-agent.github.io/gatekeeper/charts"
 
   SONOBUOY_DIR       = "#{tools_path}/sonobuoy"
   SONOBUOY_URL       = "https://github.com/vmware-tanzu/sonobuoy/releases/download/" +
-                       "v#{SONOBUOY_K8S_VERSION}/sonobuoy_#{SONOBUOY_K8S_VERSION}_#{DEFAULT_OS}-#{DEFAULT_ARCH}.tar.gz"
+                       "v#{SONOBUOY_K8S_VERSION}/sonobuoy_#{SONOBUOY_K8S_VERSION}_#{TARGET_OS}-#{TARGET_ARCH}.tar.gz"
   SONOBUOY_BINARY    = "#{SONOBUOY_DIR}/sonobuoy"
 
   HELM_DIR           = "#{tools_path}/helm"
-  HELM_URL           = "https://get.helm.sh/helm-v#{HELM_VERSION}-#{DEFAULT_OS}-#{DEFAULT_ARCH}.tar.gz"
-  HELM_BINARY        = "#{HELM_DIR}/#{DEFAULT_OS}-#{DEFAULT_ARCH}/helm"
+  HELM_URL           = "https://get.helm.sh/helm-v#{HELM_VERSION}-#{TARGET_OS}-#{TARGET_ARCH}.tar.gz"
+  HELM_BINARY        = "#{HELM_DIR}/#{TARGET_OS}-#{TARGET_ARCH}/helm"
 end