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#!/bin/sh
# This scripts updates all the "Copyright" lines in source files with the
# correct most recent modification years.
#
# It must be given a file in argument. A typical usage can be to run it on all
# code source files:
#
# find \( -name '*.m' -or -name '*.cc' -or -name '*.hh' -or -name '*.c' -or -name '*.h' -or -name '*.f' \) -exec fix-copyright-years '{}' ';'
#
# The LAST_UPDATE_COMMIT variable must be updated to contain the number of the
# last commit in which such a copyright update has been done.
#
# Note that the script does not understand some unusual copyright notices: it
# will display a message in that case.
LAST_UPDATE_COMMIT=1bf81c9f5a79757c23356f16fe015ae4f10bebde
if [ -z "$1" ]; then
echo "Give a filename in argument"
exit 1
fi
if [ ! -f "$1" ]; then
echo "$1: Unknown file"
exit 1
fi
GITYEAR=$(git log $LAST_UPDATE_COMMIT.. --date=short --pretty=format:%cd -n 1 $1 | sed "s/\([0-9]\{4\}\)-[0-9]\{2\}-[0-9]\{2\}/\1/")
if [ -z "$GITYEAR" ]; then
# Not in git
exit 0
fi
COPYLINES=$(grep -c Copyright $1)
if [ $COPYLINES -eq 0 ]; then
echo "$1: File has no copyright line"
exit 1
fi
if [ $COPYLINES -ge 2 ]; then
COPYLINES=$(grep Copyright $1)
echo "$1: File has too many copyright lines (Git year: $GITYEAR): $COPYLINES"
exit 1
fi
COPYLINE=$(grep -o -E "Copyright \(C\) ([[:digit:]]{4}-)?[[:digit:]]{4} Dynare Team" $1)
if [ -z "$COPYLINE" ]; then
COPYLINE=$(grep Copyright $1)
echo "$1: Unsupported copyright notice (Git year: $GITYEAR): $COPYLINE"
exit 1
fi
ACTUALYEAR=$(echo $COPYLINE | sed "s/Copyright (C) \([0-9]\{4\}-\)\?\([0-9]\{4\}\) Dynare Team/\2/")
if [ $GITYEAR -gt $ACTUALYEAR ]; then
sed -i "s/Copyright (C) \([0-9]\{4\}\)\(-[0-9]\{4\}\)\? Dynare Team/Copyright (C) \1-$GITYEAR Dynare Team/" $1
echo "$1: Updating to $GITYEAR"
fi
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