Sometimes it's important to perform actions before running the actual app. The classic approach is to tell people to write custom AppRun scripts.

That's not very elegant, though, as the code is pretty much the same every time. Also some plugins might have to set e.g., environment variables to work properly (a good example is #80).

Therefore linuxdeploy should, if necessary, generate an AppRun stub that is prepared to run hooks created by plugins. I guess sourceing all files in some special directory in the AppDir should be sufficient. It'll be best to make a rule that the order must not have any influence on the result.