Add a bunch of manpages.

Documentation/redo-ifcreate.md

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+% redo-ifcreate(1) Redo 0.00
+% Avery Pennarun <apenwarr@gmail.com>
+% 2010-12-12
+
+# NAME
+
+redo-ifcreate - rebuild the current target if source files are created
+
+# SYNOPSIS
+
+redo-ifcreate [sources...]
+
+
+# DESCRIPTION
+
+Normally redo-ifcreate is run from a .do file that has been
+executed by `redo`(1).  See `redo`(1) for more details.
+
+redo-ifcreate takes a list of nonexistent files (*sources*)
+and adds them as dependencies to the current target (the
+one calling redo-ifcreate).  If any of those files are
+created in the future, the target will be marked as needing
+to be rebuilt.
+
+If one of the given files exists at the time redo-ifcreate
+is called, it will return a nonzero exit code.
+
+If you want to declare dependencies on files that already
+exist, use `redo-ifchange`(1) instead.
+
+
+# REDO
+
+Part of the `redo`(1) suite.
+    
+# CREDITS
+
+The original concept for `redo` was created by D. J.
+Bernstein and documented on his web site
+(http://cr.yp.to/redo.html).  This independent implementation
+was created by Avery Pennarun and you can find its source
+code at http://github.com/apenwarr/redo.
+
+
+# SEE ALSO
+
+`redo`(1), `redo-ifchange`(1), `redo-always`(1), `redo-stamp`(1)