Updated copyright script to include all copyright years in license templates

This increases file size even further, so eventually we may want to add
ranges. That said, it's not that significant, and helps to make the life of
the project prominant.

tools/copyright

@@ -1,7 +1,7 @@
 #!/bin/bash
 # Updates copyright of various source files and commits to repository
 #
-#  Copyright (C) 2013 Mike Gerwitz
+#  Copyright (C) 2013, 2014 Mike Gerwitz
 #
 #  This file is part of GNU ease.js.
 #
@@ -70,12 +70,21 @@ read -p 'Are you sure you want to continue (y/N)? ' c
 
 copyupdate()
 {
-  years="$1"
-  file="$2"
+  local years="$1"
+  local file="$2"
 
   sed -i "s/\(. \+Copyright (C) \).*\$/\\1$years $owner/" "$file"
 }
 
+getyears()
+{
+  grep -vF '[copyright]' \
+    | cut -d' ' -f4 \
+    | sort -u \
+    | tr '\n' , \
+    | sed 's/,/, /g;s/, $//'
+}
+
 # have at it
 for file in $files; do
   ext="${file##*/*.}"
@@ -83,14 +92,10 @@ for file in $files; do
 
   # determine copyrightable years from commit log and format as year1, year2,
   # ..., yearn (TODO: join consecutive years with dash)
-  years=$(
+  years="$(
     git log --format='%aD %s' --follow -- "$file" \
-      | grep -vF '[copyright]' \
-      | cut -d' ' -f4 \
-      | sort -u \
-      | tr '\n' , \
-      | sed 's/,/, /g;s/, $//'
-  )
+      | getyears
+  )"
 
   # no years, then no history
   if [ -z "$years" ]; then
@@ -103,10 +108,13 @@ for file in $files; do
   echo "$years."
 done
 
-# general files
-year="$( date +%Y )"
-copyupdate "$year" license.tpl
-copyupdate "$year" license-min.tpl
+# general license templates will contain all copyright years
+years="$(
+  git log --format='%aD %s' \
+    | getyears
+)"
+copyupdate "$years" license.tpl
+copyupdate "$years" license-min.tpl
 
 # commit
 git commit -am '[copyright] Copyright update'