tools.echo: adding "echo" tool.

extra/tools/echo/authors.txt

@@ -0,0 +1 @@
+John Benediktsson

extra/tools/echo/deploy.factor

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+USING: tools.deploy.config ;
+H{
+    { deploy-name "echo" }
+    { 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/echo/echo.factor

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+! Copyright (C) 2011 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: command-line io kernel namespaces sequences ;
+
+IN: tools.echo
+
+: -n? ( args -- ? args' )
+    [ first "-n" = ] keep over [ rest ] when ;
+
+: echo-args ( args -- )
+    -n? " " join write [ nl ] unless ;
+
+: run-echo ( -- )
+    command-line get [ nl ] [ echo-args ] if-empty ;
+
+MAIN: run-echo