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For Chrome we had to go through a lot of extra effort to make updates not break us. http://neugierig.org/software/chromium/notes/2011/08/zygote.html http://neu

• kuschku 9y ago
  Or you could explicitly design the package so that your pre/postinstall scripts ensure that you install to a separate directory, and rename-replace the old directory, so you can’t get half-finished updates. Regarding the rest, if your code has incompatible API breaks between two patch or minor version changes, you’ll need to rethink your development model.