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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a potential approach that I’d love to get some feedback on. The idea is to inject the class into the global namespace, using an immediate variable expansion to trigger the installation. This is nice because it means you can write
the progress handler directly in the .bb file, alongside the task itself.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">def install_progress_handler():<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> from bb.progress import ProgressHandler<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> class BarProgressHandler(ProgressHandler):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> def __init__(self, d, outfile=None):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> super(BarProgressHandler, self).__init__(d, outfile)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> self._fire_progress(0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> def write(self, string):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> # >> bar stuff here <<<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> super(BarProgressHandler, self).write(string)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> __builtins__["BarProgressHandler"] = BarProgressHandler<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">INITIALIZER := "${@install_progress_handler()}"<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Then a varflag (either [progress] or a perhaps new one) will be used to pass the name of the class to instantiate.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looks like BB_SIGNATURE_HANDLER and BB_SCHEDULERS do something similar.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thoughts?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Chris<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> openembedded-core-bounces@lists.openembedded.org [mailto:openembedded-core-bounces@lists.openembedded.org]
<b>On Behalf Of </b>Chris Laplante via Openembedded-core<br>
<b>Sent:</b> Saturday, April 14, 2018 8:52 PM<br>
<b>To:</b> otavio.salvador@ossystems.com.br<br>
<b>Cc:</b> <br>
<b>Subject:</b> Re: [OE-core] Custom progress handlers<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Great, I'll give it a go then :)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">The type of progress output I'm handling is that of a fixed-width bar that fills up with a certain character (e.g. '*' or '#"). Just like BitBake's own output.
<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Moreover I want to generalize it to support multiple weighted stages, e.g.:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <span style="font-family:"Courier New"">STAGE 1: message</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New""> [######################]</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <span style="font-family:"Courier New"">STAGE 2: message 2</span><o:p></o:p></p>
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<p class="MsoNormal"> <span style="font-family:"Courier New"">[############ ]</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">To the progress handler, a stage generally looks like:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">[ ]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">[# ]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">[## ]</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">[### ]</span><o:p></o:p></p>
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<p class="MsoNormal">… etc.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Will also try to handle the case of an embedded spinner, e.g.: | / - \ -<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks again for the encouragement <span style="font-family:"Segoe UI Emoji",sans-serif">
:)</span><o:p></o:p></p>
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<p class="MsoNormal">Chris<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">-----Original Message-----<br>
From: Otavio Salvador [<a href="mailto:otavio.salvador@ossystems.com.br">mailto:otavio.salvador@ossystems.com.br</a>]
<br>
Sent: Saturday, April 14, 2018 5:05 PM<br>
To: LAPLANTE,CHRIS (A-Little Falls,ex1) <<a href="mailto:chris.laplante@agilent.com">chris.laplante@agilent.com</a>><br>
Cc: Patches and discussions about the oe-core layer <<a href="mailto:openembedded-core@lists.openembedded.org">openembedded-core@lists.openembedded.org</a>><br>
Subject: Re: [OE-core] Custom progress handlers<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">On Sat, Apr 14, 2018 at 11:56 AM, Chris Laplante via Openembedded-core <<a href="mailto:openembedded-core@lists.openembedded.org">openembedded-core@lists.openembedded.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">> I have implemented a simple custom progress handler in <o:p>
</o:p></p>
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<p class="MsoNormal">> bitbake/lib/bb/progress.py. It’s designed to handle bar-style
<o:p></o:p></p>
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<p class="MsoNormal">> progress. To use it for my shell tasks, I have modified <o:p>
</o:p></p>
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<p class="MsoNormal">> “exec_func_shell” in bitbake/lib/bb/build.py. It’s implemented as a new value for the “progress”<o:p></o:p></p>
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<p class="MsoNormal">> varflag.<o:p></o:p></p>
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<p class="MsoNormal">><o:p> </o:p></p>
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<p class="MsoNormal">> Is there a better, more extensible way to add a custom progress
<o:p></o:p></p>
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<p class="MsoNormal">> handler that doesn’t require modifying progress.py and build.py? It
<o:p></o:p></p>
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<p class="MsoNormal">> would be nice to be able to specify the name of the progress handler
<o:p></o:p></p>
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<p class="MsoNormal">> class to use (e.g. via a [progress-class] varflag) and then have build.py dynamically instantiate it.<o:p></o:p></p>
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<p class="MsoNormal">> Is that possible? If so, would OE be interested in a patch to implement it?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I see no problem in adding it; I am curious about your custom handler as well :-)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Otavio Salvador O.S. Systems<o:p></o:p></p>
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<p class="MsoNormal"><a href="http://www.ossystems.com.br">http://www.ossystems.com.br</a>
<a href="http://code.ossystems.com.br">http://code.ossystems.com.br</a><o:p></o:p></p>
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<p class="MsoNormal">Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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