check for license compliance

.gitignore

@@ -10,3 +10,4 @@ assets/vendor/qtip2/basic
 Gemfile.lock
 /.sass-cache
 .ruby-version
+/tmp

Gemfile

@@ -7,4 +7,5 @@ group :test do
   gem "html-proofer"
   gem "rake"
   gem "rspec"
+  gem "nokogiri"
 end

spec/license_spec.rb

@@ -1,36 +1,31 @@
 require 'spec_helper'
 
-# List of licenses that need not be OSI approved
-LICENSE_WHITELIST = %w[
-  unlicense
-  cc0-1.0
-  wtfpl
-  bsd-3-clause-clear
-]
-
 licenses.each do |license|
-  describe "The #{license["title"]} license" do
-    describe "SPDX compliance" do
+
   # "No license" isn't really a license, so no need to test
-      unless license["id"] == "no-license"
-        it "#{license["id"]} should be a valid SPDX ID" do
-          expect(find_spdx(license["id"])).to_not be_nil
+  next if license["id"] == "no-license"
+
+  describe "The #{license["title"]} license" do
+
+    let(:id) { license["id"] }
+
+    it "has an SPDX ID" do
+      expect(spdx_ids).to include(id)
     end
 
-        it "should be the proper SPDX name" do
-          spdx = find_spdx(license["id"])
+    it "uses its SPDX name" do
+      spdx = find_spdx(id)
       expect(spdx[1]["name"].gsub(/ only$/,"")).to eql(license["title"])
     end
 
-        # CC0 and Unlicense are not OSI approved, but that's okay
-        unless LICENSE_WHITELIST.include? license["id"]
-          it "should be OSI approved" do
-            spdx = find_spdx(license["id"])
-            approved = spdx[1]["osiApproved"]
-            expect(approved).to eql(true)
-          end
-        end
-      end
+    it "should be approved by OSI or FSF or OD" do
+      osi = osi_approved?(id)
+      fsf = fsf_approved?(id)
+      od  = od_approved?(id)
+
+      approved = osi || fsf || od
+      msg = "The license must be approved by OSI, FSF, or OD. See https://git.io/vzCTV."
+      expect(approved).to eql(true), msg
     end
   end
 end

spec/spec_helper.rb

@@ -1,6 +1,8 @@
 require 'jekyll'
 require 'open-uri'
 require 'json'
+require 'open-uri'
+require 'nokogiri'
 
 def config_file
   File.expand_path "./_config.yml", source
@@ -54,6 +56,54 @@ def spdx_list
   $spdx ||= JSON.parse(open(url).read)
 end
 
+def spdx_ids
+  spdx_list.map { |name, properties| name.downcase }
+end
+
 def find_spdx(license)
   spdx_list.find { |name, properties| name.downcase == license }
 end
+
+def osi_approved?(id)
+  spdx = find_spdx(id)
+  return false unless spdx
+  spdx[1]["osiApproved"]
+end
+
+def fsf_approved_licenses
+  $fsf_approved_licenses ||= begin
+    url = "https://www.gnu.org/licenses/license-list.en.html"
+    doc = Nokogiri::HTML(open(url).read)
+    list = doc.css(".green dt")
+    licenses = {}
+    list.each do |license|
+      a = license.css("a").find { |link| !link.text.nil? && !link.text.empty? && link.attr("id") }
+      next if a.nil?
+      id = a.attr("id").downcase
+      name = a.text.strip
+      licenses[id] = name
+    end
+    licenses
+  end
+end
+
+def fsf_approved?(id)
+  fsf_approved_licenses.keys.include?(id)
+end
+
+def od_approved_licenses
+  $od_approved_licenses ||= begin
+    url = "http://licenses.opendefinition.org/licenses/groups/od.json"
+    data = open(url).read
+    data = JSON.parse(data)
+    licenses = {}
+    data.each do |id, meta|
+      licenses[id.downcase] = meta["title"]
+    end
+    licenses
+  end
+end
+
+def od_approved?(id)
+  od_approved_licenses.keys.include?(id)
+end