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

templates/base.pkr.hcl

@@ -11,10 +11,6 @@ variable "macos_version" {
   type = string
 }
 
-variable "gha_version" {
-  type = string
-}
-
 source "tart-cli" "tart" {
   vm_base_name = "ghcr.io/cirruslabs/macos-${var.macos_version}-vanilla:latest"
   vm_name      = "${var.macos_version}-base"
@@ -53,15 +49,6 @@ build {
     ]
   }
 
-  provisioner "shell" {
-    inline = [
-      "cd $HOME",
-      "mkdir actions-runner && cd actions-runner",
-      "curl -O -L https://github.com/actions/runner/releases/download/v${var.gha_version}/actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-      "tar xzf ./actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-      "rm actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-    ]
-  }
   provisioner "shell" {
     inline = [
       "/bin/bash -c \"$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\"",
@@ -76,6 +63,12 @@ build {
       "git lfs install",
     ]
   }
+
+  // Install the GitHub Actions runner
+  provisioner "shell" {
+    script = "scripts/install-actions-runner.sh"
+  }
+
   provisioner "shell" {
     inline = [
       "source ~/.zprofile",

templates/xcode.pkr.hcl

@@ -15,10 +15,6 @@ variable "xcode_version" {
   type = string
 }
 
-variable "gha_version" {
-  type = string
-}
-
 variable "android_sdk_tools_version" {
   type    = string
   default = "9477386" # https://developer.android.com/studio/#command-tools
@@ -39,18 +35,6 @@ source "tart-cli" "tart" {
 build {
   sources = ["source.tart-cli.tart"]
 
-  // re-install the actions runner
-  provisioner "shell" {
-    inline = [
-      "cd $HOME",
-      "rm -rf actions-runner",
-      "mkdir actions-runner && cd actions-runner",
-      "curl -O -L https://github.com/actions/runner/releases/download/v${var.gha_version}/actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-      "tar xzf ./actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-      "rm actions-runner-osx-arm64-${var.gha_version}.tar.gz",
-    ]
-  }
-
   provisioner "shell" {
     inline = [
       "source ~/.zprofile",
@@ -62,6 +46,11 @@ build {
     ]
   }
 
+  // Re-install the GitHub Actions runner
+  provisioner "shell" {
+    script = "scripts/install-actions-runner.sh"
+  }
+
   provisioner "shell" {
     inline = [
       "source ~/.zprofile",

variables.pkrvars.hcl

@@ -1,3 +1,2 @@
 macos_version = "sonoma"
-gha_version   = "2.312.0"
 xcode_version = "15.2"