Apple's document on submitting an app to the Mac App store contains this example use of the command productbuild, from in /Developer/usr/bin/.
productbuild \
--component build/Release/Sample.app /Applications \
--sign "3rd Party Mac Developer Installer: Name1 Name2" \
--product product_definition.plist Sample.pkg
When I run this command on my Sample app, I get the error:
productbuild: error: No product definition plist found at "product_definition.plist".
What is this product_definition.plist, where should it come from, what should be inside it, and what tool should be used to create this plist?