bionic (1) yexpand.1.gz

Provided by: nypatchy_20061220+dfsg3-4.3ubuntu1_amd64 bug

NAME
       yexpand - tool to expand environment variables in Nypatchy cradles


SYNOPSIS
       yexpand inputfile [ outputfile ]


DESCRIPTION
       yexpand is a very simple script to expand environment variables in a text file to their current values in
       the shell environment.  It was written to be used with nypatchy cradles.  It is recommended you  not  try
       to use it for any other purposes (note BUGS below).


USAGE
       yexpand  takes  inputfile  as  input, replaces all instances of shell variables (in the form $VARIABLE or
       ${VARIABLE}) with their current values in the environment, and saves the result to outputfile.  Undefined
       variables are replaced with the empty string.  If outputfile is not given, the result is instead saved to
       the current directory as a file of the same name as  inputfile.   Thus  an  input  file  in  the  current
       directory will be overwritten.


BUGS
       This  script  is very simple-minded.  Since it basically just echos its input file as a here-doc, it will
       attempt to perform all types of shell substitution (command  substitution,  etc.)  as  well  as  variable
       substitution.  Hence it is likely to fail on anything except the very simplest text files.

       Additionally,  this  script  creates  a temporary file.  The file is created in the current directory, so
       there should not be security implications.  However, any existing file named file.yexp (where file is the
       basename of inputfile) in the current directory will be overwritten and then deleted.


SEE ALSO
       fcasplit(1),   nycheck(1),   nydiff(1),   nyindex(1),  nylist(1),  nymerge(1),  nypatchy(1),  nyshell(1),
       nysynopt(1), nytidy(1)

       The reference manual for the Nypatchy suite of programs is available in compressed PostScript  format  at
       the following URL:
       http://wwwasdoc.web.cern.ch/wwwasdoc/psdir/p5refman.ps.gz


AUTHOR
       This  manual page was written by Kevin McCarty <kmccarty@debian.org> for the Debian GNU/Linux system (but
       may be used by others).  It is licensed under the GNU General Public License, version 2 or later (at your
       choice).


       Copyright (C) Kevin B. McCarty, 2008.

                                                  Mar 12, 2008                                        YEXPAND(1)