autofoo

#!/usr/bin/env bash

# Script to automatically call the "right" version of @AUTOFOO@
# installed within Sage. We read the @AUTOFOO@ output file(s) to
# determine the version from that file. Otherwise, we simply run the
# latest version. In all cases, the version can be overridden by the
# @AUTOVAR@ environment variable.

v="$@AUTOVAR@"

if [ -z "$v" ]; then
    for v_file in @AUTOFILES@; do
        v=`exec 2>/dev/null; sed -n <$v_file \
            's/^\(.*generated.*@AUTOFOO@\( *version\)*\|version=\)[ "]*\([0-9][-0-9a-z.]*\)/\3=/i; T; s/[.]*=.*//; p; q;'`
        if [ -n "$v" ]; then break; fi
    done
fi

# Default version
if [ -z "$v" ]; then
    v=@DEFAULT_VERSION@
fi

prog=`basename "$0"`
exec "$SAGE_LOCAL/@AUTOFOO@-$v/bin/$prog" "$@"