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# Store grep(1)'s --help output in a variable
grep_help=$(grep --help 2>/dev/null)
# Define and store appropriate colors for grep(1) if applicable
case $grep_help in
*--color*)
GREP_COLORS='ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36'
export GREP_COLORS
;;
esac
# Use GREP_OPTIONS to add some useful --exclude and --exclude-dir options to
# grep(1) calls if applicable
case $grep_help in
*--exclude*)
for exclude in .gitignore .gitmodules ; do
GREP_OPTIONS=${GREP_OPTIONS:+$GREP_OPTIONS }'--exclude='$exclude
done
unset -v exclude
;;
esac
case $grep_help in
*--exclude-dir*)
for exclude_dir in .cvs .git .hg .svn ; do
GREP_OPTIONS=${GREP_OPTIONS:+$GREP_OPTIONS }'--exclude-dir='$exclude_dir
done
unset -v exclude_dir
;;
esac
# We're done parsing grep(1)'s --help output now
unset -v grep_help
# Export the grep(1) options if we decided on any
if [ -n "$GREP_OPTIONS" ] ; then
export GREP_OPTIONS
fi
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