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< h1 > < i class = "glyphicon glyphicon-flash" > < / i > < code class = "obj" > before-prune< / code >
< span class = "sig" > (< code > builder,< / code > < code > all< / code > )< / span > < / h1 >
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< p > This event is emitted right before Lektor searches the build directory for data that does not match a known artifact. Orphaned data is then removed. This event is also emitted before a < code > clean< / code > , that is, when the build directory is completely purged of all data.< / p >
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