--- /dev/null
+USING: kernel file-trees ;
+IN: file-trees.tests
+{ "/sample/1" "/sample/2" "/killer/1" "/killer/2/3"
+"/killer/2/4" "/killer/2/4/6" "/megakiller" } create-tree drop
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--- /dev/null
+USING: accessors delegate delegate.protocols io.pathnames
+kernel locals namespaces sequences vectors
+tools.annotations prettyprint ;
+IN: file-trees
+
+TUPLE: tree node children ;
+CONSULT: sequence-protocol tree children>> [ node>> ] map ;
+
+: <tree> ( start -- tree ) V{ } clone
+ [ tree boa dup children>> ] [ ".." swap tree boa ] bi swap push ;
+
+DEFER: (tree-insert)
+
+: tree-insert ( path tree -- ) [ unclip <tree> ] [ children>> ] bi* (tree-insert) ;
+:: (tree-insert) ( path-rest path-head tree-children -- )
+ tree-children [ node>> path-head node>> = ] find nip
+ [ path-rest swap tree-insert ]
+ [
+ path-head tree-children push
+ path-rest [ path-head tree-insert ] unless-empty
+ ] if* ;
+: create-tree ( file-list -- tree ) [ path-components ] map
+ t <tree> [ [ tree-insert ] curry each ] keep ;
\ No newline at end of file