file-monitor: command-line file change monitor.

extra/file-monitor/file-monitor.factor

@@ -0,0 +1,21 @@
+! Copyright (C) 2015 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: accessors command-line formatting fry io io.monitors
+io.pathnames kernel namespaces sequences ;
+
+IN: file-monitor
+
+: file-monitor-loop ( monitor -- )
+    '[
+        _ next-change
+        [ changed>> ] [ path>> ] bi
+        "%u %s\n" printf flush t
+    ] loop ;
+
+: file-monitor-main ( -- )
+    command-line get ?first current-directory get or
+    dup "Monitoring %s\n" printf flush
+    [ t <monitor> file-monitor-loop ] with-monitors ;
+
+MAIN: file-monitor-main