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It looks like I can tell whether a port is installed and get the version of a installed port in question via the MacPorts registry API. But I do not see any docs on how to use the MacPorts registry API in a Portfile.
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Once I know whether a port is installed and its version number, I should be able to use
<b>conflcts_build-append</b> in a tcl block in the Portfile (e.g. in a <b>pre-configure{}</b> or
<b>pre-build{} </b>block. <b>pre-configure{}</b> probably makes the most sense).</div>
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Can someone point me to some docs on how to use the MacPorts registry API or to some example Portfiles?<br>
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Rob<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size: 11pt; color: rgb(0, 0, 0);" face="Calibri, sans-serif"><b>From:</b> macports-dev <macports-dev-bounces@lists.macports.org> on behalf of Robert Kennedy <amtor@hotmail.com><br>
<b>Sent:</b> May 20, 2023 9:47 AM<br>
<b>To:</b> macports-dev@lists.macports.org <macports-dev@lists.macports.org><br>
<b>Subject:</b> Need Help with the "conflicts_build" PortGroup</font>
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I am upgrading a port where only certain installed releases will prevent the building of the upgraded port.
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Is there a way to use <b>conflicts_build</b> from the <b>conflicts_build PortGroup</b> with only certain installed releases? Maybe it could be done by using a
<b>pre-build {}</b> tcl block?</div>
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Is there a global variable available that is set to the installed version number?
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And is there an easy way to tell if a port is already installed before upgrading?</div>
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Rob</div>
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