Improved diagnostic output: when the build fails because a package cannot be cloned into the build drive, it says which package and the repo source and destination. Improved caching logic, so that it doesn't depend on network availability as much. Improved indentation.

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#!perl -w

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use strict;

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# Sorts the input, removes duplicates, and outputs it

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# Read it

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my @content = <>;

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# Sort it, and grep to remove duplicates

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my $previous = "\n\n";

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@content = grep {$_ ne $previous && ($previous = $_, 1) } sort @content;

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# Write it

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print @content;