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End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

class method

Gem.post_uninstall

post_uninstall(&hook)

Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance and the spec that was uninstalled when Gem::Uninstaller#uninstall is called

See also .post_reset .prefix .post_install .pre_install also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1