utils: add SPDX module

Library/Homebrew/dev-cmd/audit.rb

@@ -4,6 +4,7 @@ require "formula"
 require "formula_versions"
 require "utils/curl"
 require "utils/notability"
+require "utils/spdx"
 require "extend/ENV"
 require "formula_cellar_checks"
 require "cmd/search"
@@ -118,8 +119,7 @@ module Homebrew
     # Check style in a single batch run up front for performance
     style_results = Style.check_style_json(style_files, options) if style_files
     # load licenses
-    spdx = HOMEBREW_LIBRARY_PATH/"data/spdx.json"
-    spdx_data = JSON.parse(spdx.read)
+    spdx_data = SPDX.spdx_data
     new_formula_problem_lines = []
     audit_formulae.sort.each do |f|
       only = only_cops ? ["style"] : args.only

Library/Homebrew/dev-cmd/update-license-data.rb

@@ -1,14 +1,11 @@
 # frozen_string_literal: true
 
 require "cli/parser"
-require "utils/github"
+require "utils/spdx"
 
 module Homebrew
   module_function
 
-  SPDX_PATH = (HOMEBREW_LIBRARY_PATH/"data/spdx.json").freeze
-  SPDX_API_URL = "https://api.github.com/repos/spdx/license-list-data/releases/latest"
-
   def update_license_data_args
     Homebrew::CLI::Parser.new do
       usage_banner <<~EOS
@@ -29,16 +26,14 @@ module Homebrew
     args = update_license_data_args.parse
     ohai "Updating SPDX license data..."
 
-    latest_tag = GitHub.open_api(SPDX_API_URL)["tag_name"]
-    data_url = "https://raw.githubusercontent.com/spdx/license-list-data/#{latest_tag}/json/licenses.json"
-    curl_download(data_url, to: SPDX_PATH, partial: false)
+    SPDX.download_latest_license_data!
 
-    Homebrew.failed = system("git", "diff", "--stat", "--exit-code", SPDX_PATH) if args.fail_if_not_changed?
+    Homebrew.failed = system("git", "diff", "--stat", "--exit-code", SPDX::JSON_PATH) if args.fail_if_not_changed?
 
     return unless args.commit?
 
     ohai "git add"
-    safe_system "git", "add", SPDX_PATH
+    safe_system "git", "add", SPDX::JSON_PATH
     ohai "git commit"
     system "git", "commit", "--message", "data/spdx.json: update to #{latest_tag}"
   end

Library/Homebrew/utils/spdx.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require "utils/github"
+
+module SPDX
+  module_function
+
+  JSON_PATH = (HOMEBREW_LIBRARY_PATH/"data/spdx.json").freeze
+  API_URL = "https://api.github.com/repos/spdx/license-list-data/releases/latest"
+
+  def spdx_data
+    @spdx_data ||= JSON.parse(JSON_PATH.read)
+  end
+
+  def download_latest_license_data!
+    latest_tag = GitHub.open_api(API_URL)["tag_name"]
+    data_url = "https://raw.githubusercontent.com/spdx/license-list-data/#{latest_tag}/json/licenses.json"
+    curl_download(data_url, to: JSON_PATH, partial: false)
+  end
+end