Automate the procedure for updating copyright year.

* admin/merge-gnulib (GNULIB_MODULES): Add update-copyright.
* admin/notes/years: Mention admin/update-copyright.
* admin/update-copyright: New file.
* build-aux/update-copyright: New file.
* make-dist: Distribute it.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* msdos/autogen/Makefile.in: Update copyright year.

4 files changed, 88 insertions, 3 deletions

diff --git a/admin/ChangeLog b/admin/ChangeLog
index 40d1e069f03..ea47a6798b5 100644
--- a/admin/ChangeLog
+++ b/admin/ChangeLog
@@ -1,3 +1,10 @@
+2013-12-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Automate the procedure for updating copyright year.
+        * merge-gnulib (GNULIB_MODULES): Add update-copyright.
+        * notes/years: Mention admin/update-copyright.
+        * update-copyright: New file.
+
 2013-12-24  Xue Fuqiao  <xfq.free@gmail.com>
 
         * admin.el (add-release-logs):
diff --git a/admin/merge-gnulib b/admin/merge-gnulib
index af9300edbec..a86630f9e17 100755
--- a/admin/merge-gnulib
+++ b/admin/merge-gnulib
@@ -37,7 +37,8 @@ GNULIB_MODULES='
   pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat
   sig2str socklen stat-time stdalign stdarg stdbool stdio
   strftime strtoimax strtoumax symlink sys_stat
-  sys_time time timer-time timespec-add timespec-sub unsetenv utimens
+  sys_time time timer-time timespec-add timespec-sub
+  unsetenv update-copyright utimens
   warnings
 '
 
diff --git a/admin/notes/years b/admin/notes/years
index e6b38c5aefd..57cb5ad7e4f 100644
--- a/admin/notes/years
+++ b/admin/notes/years
@@ -2,6 +2,8 @@ HOW TO MAINTAIN COPYRIGHT YEARS FOR GNU EMACS
 
 Maintaining copyright years is now very simple: every time a new year
 rolls around, add that year to every FSF (and AIST) copyright notice.
+Do this by running the 'admin/update-copyright' script on a fresh bzr
+checkout.  Inspect the results for plausiblity, then commit them.
 
 There's no need to worry about whether an individual file has changed
 in a given year - it's sufficient that Emacs as a whole has changed.
@@ -28,10 +30,10 @@ but should keep the full list in a comment in the source.
  since Emacs 21 came out in 2001, all the subsequent years[1].  We don't
  need to check whether *that file* was changed in those years.
  It's sufficient that *Emacs* was changed in those years (and it was!).
-  
+
  For those files that have been added since then, we should add
  the year it was added to Emacs, and all subsequent years."
-  
+
  --RMS, 2005-07-13
 
 [1] Note that this includes 2001 - see
diff --git a/admin/update-copyright b/admin/update-copyright
new file mode 100755
index 00000000000..64653d97237
--- /dev/null
+++ b/admin/update-copyright
@@ -0,0 +1,75 @@
+#! /bin/sh
+# Update the copyright dates in Emacs sources.
+# Typical usage:
+#
+#       admin/update-copyright
+#
+# By default, this script uses the local-time calendar year.
+# Set the UPDATE_COPYRIGHT_YEAR environment variable to override the default.
+
+# Copyright 2013 Free Software Foundation, Inc.
+
+# This file is part of GNU Emacs.
+
+# GNU Emacs is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU Emacs is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+# written by Paul Eggert
+
+# FIXME: The file 'notes/copyright' says that the AIST copyright years
+# should be updated, but by inspection it appears that some should be
+# updated and some should not be, due to registration numbers, so
+# this script leaves these copyright years alone for now.
+
+: ${UPDATE_COPYRIGHT_USE_INTERVALS=1}
+export UPDATE_COPYRIGHT_USE_INTERVALS
+
+: ${UPDATE_COPYRIGHT_YEAR=$(date +%Y)}
+export UPDATE_COPYRIGHT_YEAR
+
+emacsver=etc/refcards/emacsver.tex
+sed 's/\\def\\year[{][0-9]*[}]/\\def\\year{'"$UPDATE_COPYRIGHT_YEAR"'}'/g \
+  $emacsver >$emacsver.aux &&
+{ cmp -s $emacsver $emacsver.aux ||
+  cp $emacsver.aux $emacsver
+} &&
+rm $emacsver.aux &&
+
+bzr_files=$(bzr ls -RV --kind file) &&
+
+# Do not update the copyright of files that have one or more of the
+# following problems:
+# . They are license files, maintained by the FSF, with their own dates.
+# . Their format cannot withstand changing the contents of copyright strings.
+
+updatable_files=$(find $bzr_files \
+  ! -name COPYING \
+  ! -name doclicense.texi \
+  ! -name gpl.texi \
+  ! -name '*-gzipped' \
+  ! -name '*.ico' \
+  ! -name '*.icns' \
+  ! -name '*.pbm' \
+  ! -name '*.pdf' \
+  ! -name '*.png' \
+  ! -name '*.sig' \
+  ! -name '*.tar' \
+  ! -name '*.tiff' \
+  ! -name '*.xpm' \
+  ! -name eterm-color \
+  ! -name hand.cur \
+  ! -name key.pub \
+  ! -name key.sec \
+  -print) &&
+
+build-aux/update-copyright $updatable_files