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if [ -z "$NARWHAL_ENGINE" ] && [ `uname` == "Darwin" ]; then
# We should check "narwhal-jsc.conf" and the corresponding executable to determine whether JSC can be "$NARWHAL_ENGINE".
if [ -f "$NARWHAL_HOME/packages/narwhal-jsc/narwhal-jsc.conf" ]; then
source "$NARWHAL_HOME/packages/narwhal-jsc/narwhal-jsc.conf"
fi
if [ -z "$NARWHAL_JSC_MODE" ]; then
NARWHAL_JSC_MODE="jscore"
fi
if [ -f "$NARWHAL_HOME/packages/narwhal-jsc/bin/narwhal-$NARWHAL_JSC_MODE" ]; then
export NARWHAL_ENGINE=jsc
fi
fi
if [ "$NARWHAL_ENGINE" == jsc ] && [ `ulimit -n` -lt 1024 ]; then
# JSC and Narwhal together open a lot of files. We want to increase the
# ulimit to a certain minimum here, but only the soft limit. We avoid
# changing the hard limit because someone might want to change the limit
# again later.
ulimit -Sn 1024
fi
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