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    <p>Hello,</p>
    <p>as written on the tracker, look at using #!subst or #!substdef
      (see core cookbook), they should be able to get the substitution
      value from environment using $env(NAME).</p>
    <p>The master branch introduced #!defenv as a (simpler) alternative.</p>
    <p>Cheers,<br>
      Daniel<br>
    </p>
    <div class="moz-cite-prefix">On 12.12.20 05:33, Syed Shahryar wrote:<br>
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cite="mid:CA+mcf=u8Sn8Yq=U8FLKAzoMs+kLmy1-GabpMOatFx2MUaw6ESA@mail.gmail.com">
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        <div>I tried many combinations of the following but I keep
          getting syntax errors:</div>
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        <div>listen=tls:TLS_IP:$env(TLS_PORT) advertise
          PUBLIC_IP:$env(TLS_PORT)<br>
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        <div><br>
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        <div>TLS_IP and PUBLIC_IP are constants defined at the top using
          #!define. And, TLS_PORT is supposed to be the env variable.<br>
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        -- <br>
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    <pre class="moz-signature" cols="72">-- 
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
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