REDO-IFCREATE(1)            General Commands Manual           REDO-IFCREATE(1)

NAME
       redo-ifcreate - rebuild target files when source files are created

SYNOPSIS
       redo-ifcreate target [target]...

DESCRIPTION
       redo(1) is a tool for building files and for rebuilding them if any of
       their dependencies have changed.  redo-ifcreate, when invoked from a
       dofile, adds non-existence dependencies of the current redo(1) target
       on all files given as arguments. This means that the current target
       will be rebuilt on invocation of redo(1) if any of the files given as
       arguments to redo-ifcreate exist. If an argument to redo-ifcreate
       exists, it exits with a status code indicating failure.

EXAMPLES
       Consider the following two files all.do and b.do:

       all.do
              #!/bin/sh
              redo-ifchange b

       b.do
              #!/bin/sh
              if [ ! -e c ]; then
               redo-ifcreate c
              fi
              date +%s

       Invoking redo(1) in a directory with these files that does not contain
       a file named c will build a file named b containing a timestamp. The
       next time redo(1) is invoked, it will only rebuild b if a file named c
       was created since the last build. This can be verified by invoking
       redo(1) repeatedly and examining the timestamp b after each invocation,
       then creating a file named c, invoking redo(1) again and examining the
       timestamp again.

HISTORY
       redo-ifcreate was designed by D. J. Bernstein and implemented by Nils
       Dagsson Moskopp.

       Target files depend on nonexistent files <URL:
       https://cr.yp.to/redo/honest-nonfile.html > by D. J. Bernstein

AUTHOR
       redo-ifcreate and this man page were written by Nils Dagsson Moskopp.

COPYRIGHT
       Copyright (C) 2014-2016 Nils Dagsson Moskopp.  License AGPLv3+: GNU
       Affero GPL version 3 or later
       <http://www.gnu.org/licenses/agpl-3.0.html>.  This is free software:
       you are free to create and redistribute it. There is NO WARRANTY, to
       the extent permitted by law.

SEE ALSO
       redo(1), redo-always(1), redo-dot(1), redo-ifchange(1), redo-ood(1),
       redo-sources(1), redo-stamp(1), redo-targets(1)

BUGS
       redo-ifcreate may break if a source filename contains a tab or newline
       character.

                                                              REDO-IFCREATE(1)