Simplify copyrighted check

utils/helpers/copyrighted.rb

@@ -2,49 +2,19 @@
 
 # SPDX-License-Identifier: MIT OR Apache-2.0
 #
-# Copyright (c) 2018-2019 Andre Richter <andre.o.richter@gmail.com>
+# Copyright (c) 2018-2020 Andre Richter <andre.o.richter@gmail.com>
 
-def checkin_years(file)
-    checkin_years = `git --no-pager log \
-                     --reverse --pretty=format:'%ad' --date=format:'%Y' #{file}`
-
-    checkin_years.split(/\n/).map!(&:to_i)
-end
-
-def parse_checkin_years(file)
-    checkin_years = checkin_years(file)
-    checkin_years << Time.now.year
-
-    checkin_years.minmax
-end
+def copyrighted?(file)
+    copyright_years = []
 
-def min_max_seen?(copyright_lines, checkin_min, checkin_max)
-    min_seen = false
-    max_seen = false
-    copyright_lines.each do |x|
-        x.scan(/\d\d\d\d/).map!(&:to_i).each do |y|
-            min_seen = true if y == checkin_min
-            max_seen = true if y == checkin_max
-        end
+    File.readlines(file).grep(/.*Copyright.*/).each do |x|
+        copyright_years << x.scan(/\d\d\d\d/).map!(&:to_i)
     end
 
-    [min_seen, max_seen]
-end
-
-def print_on_err(file, copyright_lines, checkin_min, checkin_max)
-    puts file + ': '
-    puts "\tHeader:   " + copyright_lines.inspect
-    puts "\tMin year: " + checkin_min.to_s
-    puts "\tMax year: " + checkin_max.to_s
-end
-
-def copyrighted?(file)
-    checkin_min, checkin_max = parse_checkin_years(file)
-    copyright_lines = File.readlines(file).grep(/.*Copyright.*/)
-    min_seen, max_seen = min_max_seen?(copyright_lines, checkin_min, checkin_max)
+    copyright_years = copyright_years.flatten.uniq
 
-    unless min_seen && max_seen
-        print_on_err(file, copyright_lines, checkin_min, checkin_max)
+    unless copyright_years.include?(Time.now.year)
+        puts "\tHeader:   " + copyright_years.inspect
         return false
     end