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libphutil/support/xhpast/find_flex.sh

 

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#!/bin/bash

 

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FLEX=`which flex35 2>/dev/null || which flex 2>/dev/null`

 

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if [ $? -ne 0 ]

 

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then

 

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  echo "ERROR: 'flex' is not installed on this system." 1>&2;

 

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  exit 1;

 

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fi

 

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FLEXVERSION=`"$FLEX" --version`

 

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if [[ $FLEXVERSION == "flex 2.5.4" ]]

 

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then

 

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  echo "ERROR: the version of flex on this system is too old." 1>&2

 

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  echo "Upgrade to at least 2.5.35 (which is NEWER than 2.5.4)." 1>&2

 

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  exit 1;

 

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fi

 

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if [ "$FLEXVERSION" != "flex 2.5.35" -a "$FLEXVERSION" != "flex35 2.5.35" ]

 

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then

 

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  echo "WARNING: the version of flex on this system may be incorrect." 1>&2

 

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  echo "If you receive errors, try upgrading to 2.5.35 or newer." 1>&2

 

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fi

 

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echo $FLEX

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