tools.uniq: adding "uniq" tool.

extra/tools/uniq/authors.txt

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+John Benediktsson

extra/tools/uniq/deploy.factor

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+USING: tools.deploy.config ;
+H{
+    { deploy-name "uniq" }
+    { deploy-ui? f }
+    { deploy-c-types? f }
+    { deploy-console? t }
+    { deploy-unicode? f }
+    { "stop-after-last-window?" t }
+    { deploy-io 3 }
+    { deploy-reflection 6 }
+    { deploy-word-props? f }
+    { deploy-math? t }
+    { deploy-threads? t }
+    { deploy-word-defs? f }
+}

extra/tools/uniq/uniq.factor

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+! Copyright (C) 2011 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: command-line io io.encodings.utf8 io.files kernel
+namespaces sets sequences ;
+
+IN: tools.uniq
+
+: uniq-lines ( -- )
+    f [
+        2dup = [ dup print ] unless nip
+    ] each-line drop ;
+
+: uniq-file ( path/f -- )
+    [
+        utf8 [ uniq-lines ] with-file-reader
+    ] [
+        uniq-lines
+    ] if* ;
+
+: run-uniq ( -- )
+    command-line get [ ?first ] [ ?second ] bi [
+        utf8 [ uniq-file ] with-file-writer
+    ] [
+        uniq-file
+    ] if* ;
+
+MAIN: run-uniq