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## Copyright (C) 2007-2013 David Bateman
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or (at
## your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Command} {} run @var{script}
## @deftypefnx {Function File} {} run ("@var{script}")
## Run @var{script} in the current workspace.
##
## Scripts which reside in directories specified in Octave's load
## path, and which end with the extension @file{".m"}, can be run simply by
## typing their name. For scripts not located on the load path, use @code{run}.
##
## The file name @var{script} can be a bare, fully qualified, or relative
## filename and with or without a file extension. If no extension is specified,
## Octave will first search for a script with the @file{".m"} extension before
## falling back to the script name without an extension.
##
## Implementation Note: If @var{script} includes a path component, then
## @code{run} first changes the directory to the directory where @var{script}
## is found. @code{run} then executes the script, and returns to the original
## directory.
## @seealso{path, addpath, source}
## @end deftypefn
function run (script)
if (nargin != 1)
print_usage ();
endif
[d, f, ext] = fileparts (script);
if (! strcmp (ext, ".m"))
## prefer files with .m extension for compatibility with Matlab
if (exist ([script ".m"], "file"))
f = [f ext];
ext = ".m";
script = [script ".m"];
endif
endif
if (! exist (script, "file"))
error ("run: file SCRIPT must exist and be a valid Octave scriptfile");
endif
if (! isempty (d))
if (exist (d, "dir"))
wd = pwd ();
unwind_protect
cd (d);
evalin ("caller", sprintf ('source ("%s%s");', f, ext),
"rethrow (lasterror ())");
unwind_protect_cleanup
cd (wd);
end_unwind_protect
else
error ("run: the path %s doesn't exist", d);
endif
else
if (! isempty (ext))
script = which (script);
else
## Search PATH with null extension ('.' will be stripped and ext = "")
script = which ([script "."]);
endif
evalin ("caller", sprintf ('source ("%s");', script),
"rethrow (lasterror ())");
endif
endfunction
%% Test input validation
%!error run ()
%!error run ("a", "b")
%!error <SCRIPT must exist> run ("__A_very_#unlikely#_file_name__")
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