Programatically change which opens a file type

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08-13-2009

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Programatically change which opens a file type

Hi there,

If we have 2 apps on our customers machines that can both open files of a certain file extension, is there any way via shell commands to set which application should be the default?

Essentially, I'm hoping to replicate Get Info > Open With > Change All, but using a script.

Thanks in advance!
Dave

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gopen

GOPEN(1)						       GNUstep System Manual							  GOPEN(1)

NAME

       gopen - open files

SYNOPSIS

       gopen [-a application] [-o] [-p] [-NXHost hostname] [filename]

DESCRIPTION

       The gopen command allows you open a file (or directory) as if you had double clicked the object's icon.

       It is possible to specify one or more filenames which are interpreted relative to the current working directory.

       By  default,  gopen will open filename with the application currently assigned to the file's extension. But by specifing the -a flag on the
       command line you can tell gopen to open the file with another application.

       You can also directly print a file without ( -p ) or with ( -p -o ) opening it.

       As with most other GNUstep software, it is easily possible to attach the process to a remote window server using the -NXHost flag.

OPTIONS

       -a application
	      use application to open filename

       -o     open filename (may be used in conjunction with -p ).

       -p     print filename instead of opening.

       -NXHost hostname
	      attach to remote window server on hostname

EXAMPLES

       Open all files with a .txt extension in the current directory:

       gopen *.txt

       To open a source file in CodeEditor (instead of the current default application), type:

       gopen -a CodeEditor MySourceFile.m

       To print the .plan file in your home folder, use the -p flag:

       gopen -p ~/.plan

BUGS

       Using the -a application argument, gopen allows you to open any kind of file with any application you want. This does,  however,  not  work
       with applications employing the NSDocument architecture as they will only receive filenames whose types the application has registered.	To
       circumvent this limitation, applications may advertise their ability to open all kinds of files through the "*" filetype.   When  gopen	is
       used with only the -a application argument but no filename
	present, the application is simply launched without opening a specific file.

SEE ALSO

       GNUstep(7), openapp(1)

HISTORY

       gopen was written November 2001.

       This manual page was first written July 2003.

AUTHORS

       gopen was written by Gregory Casamento <greg_casamento@yahoo.com>.

       This man page was written by Martin Brecher <martin@mb-itconsulting.com>.

GNUstep 							    August 2003 							  GOPEN(1)

OS X (Apple)