Add lib/package_utils.rb to provide a number of package convenience functions. (#9617)

lib/package_utils.rb

@@ -0,0 +1,33 @@
+require 'json'
+require_relative 'const'
+
+class PackageUtils
+  def self.installed?(pkg_name)
+    device_json = JSON.load_file(File.join(CREW_CONFIG_PATH, 'device.json'))
+    return device_json['installed_packages'].any? { |elem| elem['name'] == pkg_name }
+  end
+
+  def self.compatible?(pkg)
+    return pkg.compatibility.casecmp?('all') || pkg.compatibility.include?(ARCH)
+  end
+
+  def self.get_url(pkg, build_from_source: false)
+    if !build_from_source && pkg.binary_sha256&.key?(ARCH.to_sym)
+      return "https://gitlab.com/api/v4/projects/26210301/packages/generic/#{pkg.name}/#{pkg.version}_#{ARCH}/#{pkg.name}-#{pkg.version}-chromeos-#{ARCH}.#{pkg.binary_compression}"
+    elsif pkg.source_url.is_a?(Hash) && pkg.source_url&.key?(ARCH.to_sym)
+      return pkg.source_url[ARCH.to_sym]
+    else
+      return pkg.source_url
+    end
+  end
+
+  def self.get_sha256(pkg, build_from_source: false)
+    if !build_from_source && pkg.binary_sha256&.key?(ARCH.to_sym)
+      return pkg.binary_sha256[ARCH.to_sym]
+    elsif pkg.source_sha256.is_a?(Hash) && pkg.source_sha256&.key?(ARCH.to_sym)
+      return pkg.source_sha256[ARCH.to_sym]
+    else
+      return pkg.source_sha256
+    end
+  end
+end