Add initial sdk-build-macos image Packer script

This commit adds the Packer script for building the sdk-build-macos
Tart OCI image.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

sdk-build-macos.pkr.hcl

@@ -0,0 +1,60 @@
+packer {
+  required_plugins {
+    tart = {
+      version = ">= 1.12.0"
+      source  = "github.com/cirruslabs/tart"
+    }
+  }
+}
+
+source "tart-cli" "tart" {
+  vm_base_name = "ghcr.io/cirruslabs/macos-sonoma-xcode:15.3"
+  vm_name      = "sdk-build-macos"
+  cpu_count    = 4
+  memory_gb    = 8
+  disk_size_gb = 100
+  headless     = true
+  ssh_password = "admin"
+  ssh_username = "admin"
+  ssh_timeout  = "120s"
+}
+
+build {
+  sources = ["source.tart-cli.tart"]
+
+  # Update Homebrew packages
+  provisioner "shell" {
+    inline = [
+      "source ~/.zprofile",
+      "brew --version",
+      "brew update",
+      "brew upgrade",
+    ]
+  }
+
+  # Install bash
+  provisioner "shell" {
+    inline = [
+      "source ~/.zprofile",
+      "brew install bash",
+    ]
+  }
+
+  # Install base packages (equivalent to GitHub-hosted runners)
+  provisioner "shell" {
+    inline = [
+      "source ~/.zprofile",
+      "brew install cmake jq git-lfs gnu-tar gnupg wget xz",
+    ]
+  }
+
+  # Install additional packages for SDK build
+  provisioner "shell" {
+    inline = [
+      "source ~/.zprofile",
+      "brew install awscli autoconf automake binutils boost ccache coreutils",
+      "brew install dos2unix dtc gawk gnu-sed gperf help2man meson ncurses",
+      "brew install ninja pkg-config [email protected] texinfo",
+    ]
+  }
+}