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February 26, 2017 15:52
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Command line to partially cure get_iplayer's verbal diarrhoea. ie. don't show output unless/until ERROR or WARNING appears; then display it ALL.
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| get_iplayer --pvr 2>&1 | perl -ne 'if(/ERROR|WARNING/){$q=1;print $b;undef $b;}if($q){print $_;}else{$b.=$_;}' |
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get_iplayer is excellent, but it does tend to be either too verbose, or absolutely silent, as the
--verbose,--quietand--silentoptions are a bit too hefty. Plus, if--pvris specified, the behaviour changes again.So, when run on a cron, you either get a massive email containing useless drivel, or nothing at all. Rather than just grep for errors (which would lose context), this perl one-liner will buffer all output. If no errors occur, then the script is silent, so cron won't send an email. If, however, it comes across
ERRORorWARNING, it'll output everything up to the error, and continue outputting everything afterwards.I really do wish someone would just improve the granularity of get_iplayer's logging instead.