update-copyright: accept new option: UPDATE_COPYRIGHT_USE_INTERVALS=2

[gnulib.git] / build-aux / update-copyright

diff --git a/build-aux/update-copyright b/build-aux/update-copyright
index d86a12b..30a27f2 100755 (executable)
--- a/build-aux/update-copyright
+++ b/build-aux/update-copyright
@@ -3,7 +3,7 @@ eval '(exit $?0)' && eval 'exec perl -wS -0777 -pi "$0" ${1+"$@"}'
     if 0;
 # Update an FSF copyright year list to include the current year.
 
-my $VERSION = '2011-01-02.20:59'; # UTC
+my $VERSION = '2012-01-27.09:18'; # UTC
 
 # Copyright (C) 2009-2012 Free Software Foundation, Inc.
 #
@@ -110,6 +110,9 @@ my $VERSION = '2011-01-02.20:59'; # UTC
 #      interval (such as 1990-2008).  If unset or set to 0, all existing
 #      copyright year intervals in a reformatted FSF copyright statement
 #      are expanded instead.
+#      If UPDATE_COPYRIGHT_USE_INTERVALS=2, convert a sequence with gaps
+#      to the minimal containing range.  For example, convert
+#      2000, 2004-2007, 2009 to 2000-2009.
 #   3. For testing purposes, you can set the assumed current year in
 #      UPDATE_COPYRIGHT_YEAR.
 #   4. The default maximum line length for a copyright line is 72.
@@ -221,6 +224,10 @@ if (defined $stmt_re)
                   }))
                 )+
               /$1-$3/gx;
+
+            # When it's 2, emit a single range encompassing all year numbers.
+            $ENV{UPDATE_COPYRIGHT_USE_INTERVALS} == 2
+              and $stmt =~ s/\b(\d{4})\b.*\b(\d{4})\b/$1-$2/;
           }
 
         # Format within margin.