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We make use of
install_if
in our appraisals. However, if you aren't using Bundler 2.4 then you can't generate any appraisal gemfiles.This commit enforces the correct version of Bundler by adding a check to the Gemfile itself. This isn't ideal, but we can't simply add
gem "bundler", "~> 2.4"
to the Gemfile because of the new-ish logic in Bundler which automatically switches to the version of Bundler specified by theBUNDLED WITH
section in the lockfile. Unfortunately, we can't commit the lockfiles to the repo, so neither adding thegem
line nor updating theBUNDLED WITH
would work.