Create an OS X package from the command line
 Mon, Jun 23 '03 at 09:57AM ¥ from: carsten 	 
	How to Programmatically Create a Mac OS X Package 
        (from the command-line or a shell script).

Note that any lines ending with a backslash should be one line; 
they've been broken here for a narrower display width.

   1. Set up the files you want to package in a folder called dstroot:

% mkdir ./dstroot
% mkdir -p ./dstroot/usr/local/bin/ \
   dstroot/usr/local/share/man/man1/
% install -m 755 myprog ./dstroot/usr/local/bin/
% install -m 644 myprog.1 \
   ./dstroot/usr/local/share/man/man1/

   2. Create a package info file (this has nothing to do with Fink info files). 
      Either copy one from another .pkg to use as a template, or see this pkg info file from osxutils.

   3. Make the package:

% find dstroot -name .DS_Store -delete
% sudo chown -R root:staff dstroot
% package dstroot mypackage-0.1.info -d . -ignoreDSStore
% rm -f 1
% install -m 644 README.txt \
   mypackage-0.1.pkg/Contents/Resources/ReadMe.txt
% install -m 644 LICENSE.txt \    mypackage-0.1.pkg/Contents/Resources/License.txt
% sudo chown -R root:staff \
   mypackage-0.1.pkg/Contents/Resource
% tar -h mypackage-0.1.pkg -cf mypackage-0.1.pkg.tar
% gzip -9 mypackage-0.1.pkg.tar

See an example Makefile (http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/osxutils/osxutils/Makefile) 
from the osxutils package which builds a .pkg from the command line at SourceForge.